[51/77] Use opt_scalar_int_mode when iterating over integer modes

This patch uses opt_scalar_int_mode rather than machine_mode
when iterating over scalar_int_modes, in cases where that helps
with future patches.  (Using machine_mode is still OK in places
that don't really care about the mode being a scalar integer.)

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* cse.c (cse_insn): Use opt_scalar_int_mode for the mode iterator.
* explow.c (hard_function_value): Likewise.
* expmed.c (extract_fixed_bit_field_1): Likewise.  Move the
convert_to_mode call outside the loop.
* expr.c (alignment_for_piecewise_move): Use opt_scalar_int_mode
for the mode iterator.  Require the mode specified by max_pieces
to exist.
(emit_block_move_via_movmem): Use opt_scalar_int_mode for the
mode iterator.
(copy_blkmode_to_reg): Likewise.
(set_storage_via_setmem): Likewise.
* optabs.c (prepare_cmp_insn): Likewise.
* rtlanal.c (init_num_sign_bit_copies_in_rep): Likewise.
* stor-layout.c (finish_bitfield_representative): Likewise.

gcc/fortran/
* trans-types.c (gfc_init_kinds): Use opt_scalar_int_mode for
the mode iterator.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251503

[50/77] Add helper routines for SUBREG_PROMOTED_VAR_P subregs

When subregs contain promoted values, as indicated by
SUBREG_PROMOTED_VAR_P, both the unpromoted (outer) and
promoted (inner) values are known to be scalar integers.
This patch adds helper routines that get the modes as
scalar_int_modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* rtl.h (subreg_unpromoted_mode, subreg_promoted_mode): New functions.
* expr.c (convert_move): Use them.
(convert_modes): Likewise.
(store_expr_with_bounds): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251502

[49/77] Simplify nonzero/num_sign_bits hooks

The two implementations of the reg_nonzero_bits and reg_num_sign_bits
hooks ignored the "known_x", "known_mode" and "known_ret" arguments,
so this patch removes them.  It adds a new scalar_int_mode parameter
that specifies the mode of "x".  (This mode might be different from
"mode", which is the mode in which "x" is used.)

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* rtl.h (rtl_hooks::reg_nonzero_bits): Add a scalar_int_mode
parameter for the mode of "x".  Remove the "known_x", "known_mode"
and "known_ret" arguments.  Change the type of the mode argument
to scalar_int_mode.
(rtl_hooks:reg_num_sign_bit_copies): Likewise.
* combine.c (reg_nonzero_bits_for_combine): Update accordingly.
(reg_num_sign_bit_copies_for_combine): Likewise.
* rtlanal.c (nonzero_bits1): Likewise.
(num_sign_bit_copies1): Likewise.
* rtlhooks-def.h (reg_nonzero_bits_general): Likewise.
(reg_num_sign_bit_copies_general): Likewise.
* rtlhooks.c (reg_num_sign_bit_copies_general): Likewise.
(reg_nonzero_bits_general): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251501

[48/77] Make subroutines of num_sign_bit_copies operate on scalar_int_mode

Similarly to the nonzero_bits patch, this one moves the mode
class check and VOIDmode handling from num_sign_bit_copies1
to num_sign_bit_copies itself, then changes the subroutines
to operate on scalar_int_modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* rtlanal.c (num_sign_bit_copies): Handle VOIDmode here rather
than in subroutines.  Return 1 for non-integer modes.
(cached_num_sign_bit_copies): Change the type of the mode parameter
to scalar_int_mode.
(num_sign_bit_copies1): Likewise.  Remove early exit for other mode
classes.  Handle CONST_INT_P first and then check whether X also
has a scalar integer mode.  Check the same thing for inner registers
of a SUBREG and for values that are being extended or truncated.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251500

[47/77] Make subroutines of nonzero_bits operate on scalar_int_mode

nonzero_bits1 assumed that all bits of a floating-point or vector mode
were needed.  It seems likely that fixed-point modes should have been
handled in the same way.  After excluding those, the only remaining
modes that are likely to be useful are scalar integer ones.

This patch moves the mode class check to nonzero_bits itself, along
with the handling of mode == VOIDmode.  The subroutines of nonzero_bits
can then take scalar_int_modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* rtlanal.c (nonzero_bits): Handle VOIDmode here rather than
in subroutines.  Return the mode mask for non-integer modes.
(cached_nonzero_bits): Change the type of the mode parameter
to scalar_int_mode.
(nonzero_bits1): Likewise.  Remove early exit for other mode
classes.  Handle CONST_INT_P first and then check whether X
also has a scalar integer mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251499

[46/77] Make widest_int_mode_for_size return a scalar_int_mode

The comment for widest_int_mode said that it returns "the widest integer
mode no wider than SIZE", but it actually returns the widest integer
mode that is narrower than SIZE.  In practice SIZE is always greater
than 1, so it can always pick QImode in the worst case.  The VOIDmode
paths seem to be dead.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* expr.c (widest_int_mode_for_size): Make the comment match the code.
Return a scalar_int_mode and assert that the size is greater than
one byte.
(by_pieces_ninsns): Update accordingly and remove VOIDmode handling.
(op_by_pieces_d::op_by_pieces_d): Likewise.
(op_by_pieces_d::run): Likewise.
(can_store_by_pieces): Likewise.

From-SVN: r251498

[45/77] Make extract_left_shift take a scalar_int_mode

This patch passes the mode of the shifted value to extract_left_shift
and updates the only caller so that the mode is a scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (extract_left_shift): Add a mode argument and update
recursive calls.
(make_compound_operation_int): Change the type of the mode parameter
to scalar_int_mode and update the call to extract_left_shift.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251497

[44/77] Make simplify_and_const_int take a scalar_int_mode

After previous patches, top-level calls to simplify_and_const_int
always pass a scalar_int_mode.  The only call site that needs to
be updated is the recursive one in simplify_and_const_int_1,
at which point we know "varop" has a scalar integer mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (simplify_and_const_int): Change the type of the mode
parameter to scalar_int_mode.
(simplify_and_const_int_1): Likewise.  Update recursive call.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251496

[43/77] Use scalar_int_mode in simplify_comparison

The main loop of simplify_comparison starts with:

      if (GET_MODE_CLASS (mode) != MODE_INT
          && ! (mode == VOIDmode
                && (GET_CODE (op0) == COMPARE || COMPARISON_P (op0))))
        break;

So VOIDmode is only acceptable when comparing a COMPARE,
EQ, NE, etc. operand against a constant.  After this, the loop
calls simplify_compare_const to:

  (a) bring the constant op1 closer to 0 where possible and
  (b) use nonzero_bits and num_sign_bit_copies to get a simpler
      constant.

(a) works for both integer and VOID modes, (b) is specific
to integer modes.

The loop then has a big switch statement that handles further
simplifications.  This switch statement checks for COMPARISON_P
codes but not for COMPARE.

This patch uses scalar_int_mode to make the split between
(a) and (b) more explicit.  It also takes the COMPARISON_P
handling out of the switch statement and does it first,
so that the rest of the loop can treat the mode as a
scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (simplify_compare_const): Check that the mode is a
scalar_int_mode (rather than VOIDmode) before testing its
precision.
(simplify_comparison): Move COMPARISON_P handling out of the
loop and restrict the latter part of the loop to scalar_int_modes.
Check is_a <scalar_int_mode> before calling HWI_COMPUTABLE_MODE_P
and when considering SUBREG_REGs.  Use is_int_mode instead of
checking GET_MODE_CLASS against MODE_INT.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251495

[42/77] Use scalar_int_mode in simplify_shift_const_1

This patch makes simplify_shift_const_1 use scalar_int_modes
for all code that is specific to scalars rather than vectors.
This includes situations in which the new shift mode is different
from the original one, since the function never changes the mode
of vector shifts.  That in turn makes it more natural to test for
equal modes in simplify_shift_const_1 rather than try_widen_shift_mode
(which only applies to scalars).

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (try_widen_shift_mode): Move check for equal modes to...
(simplify_shift_const_1): ...here.  Use scalar_int_mode for
shift_unit_mode and for modes involved in scalar shifts.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251494

[41/77] Split scalar integer handling out of force_to_mode

force_to_mode exits partway through for modes that aren't scalar
integers.  This patch splits the remainder of the function out
into a subroutine, force_int_to_mode, so that the modes from that
point on can have type scalar_int_mode.

The patch also makes sure that xmode is kept up-to-date with x
and uses xmode instead of GET_MODE (x) throughout.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (force_int_to_mode): New function, split out from...
(force_to_mode): ...here.  Keep xmode up-to-date and use it
instead of GET_MODE (x).

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251493

[40/77] Use scalar_int_mode for extraction_insn fields

insv, extv and eztzv modify or read a field in a register or
memory.  The field always has a scalar integer mode, while the
register or memory either has a scalar integer mode or BLKmode.
The mode of the bit position is also a scalar integer.

This patch uses the type system to make that explicit.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* optabs-query.h (extraction_insn::struct_mode): Change type to
opt_scalar_int_mode and update comment.
(extraction_insn::field_mode): Change type to scalar_int_mode.
(extraction_insn::pos_mode): Likewise.
* combine.c (make_extraction): Update accordingly.
* optabs-query.c (get_traditional_extraction_insn): Likewise.
(get_optab_extraction_insn): Likewise.
* recog.c (simplify_while_replacing): Likewise.
* expmed.c (narrow_bit_field_mem): Change the type of the mode
parameter to opt_scalar_int_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251492

[39/77] Two changes to the get_best_mode interface

get_best_mode always returns a scalar_int_mode on success,
so this patch makes that explicit in the type system.  Also,
the "largest_mode" argument is used simply to provide a maximum
size, and in practice that size is always a compile-time constant,
even when the concept of variable-sized modes is added later.
The patch therefore passes the size directly.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (bit_field_mode_iterator::next_mode): Take a pointer
to a scalar_int_mode instead of a machine_mode.
(bit_field_mode_iterator::m_mode): Change type to opt_scalar_int_mode.
(get_best_mode): Return a boolean and use a pointer argument to store
the selected mode.  Replace the limit mode parameter with a bit limit.
* expmed.c (adjust_bit_field_mem_for_reg): Use scalar_int_mode
for the values returned by bit_field_mode_iterator::next_mode.
(store_bit_field): Update call to get_best_mode.
(store_fixed_bit_field): Likewise.
(extract_fixed_bit_field): Likewise.
* expr.c (optimize_bitfield_assignment_op): Likewise.
* fold-const.c (optimize_bit_field_compare): Likewise.
(fold_truth_andor_1): Likewise.
* stor-layout.c (bit_field_mode_iterator::next_mode): As above.
Update for new type of m_mode.
(get_best_mode): As above.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251491

[38/77] Move SCALAR_INT_MODE_P out of strict_volatile_bitfield_p

strict_volatile_bitfield_p returns false for any mode that isn't
a scalar integer.  This patch moves the check to the caller and
makes strict_volatile_bitfield_p take the mode as a scalar_int_mode.
The handling of a true return can then also use the mode as a
scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* expmed.c (strict_volatile_bitfield_p): Change the type of fieldmode
to scalar_int_mode.  Remove check for SCALAR_INT_MODE_P.
(store_bit_field): Check is_a <scalar_int_mode> before calling
strict_volatile_bitfield_p.
(extract_bit_field): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251490

[37/77] Use scalar_int_mode when emitting cstores

cstore patterns always have a scalar integer result, which has the
value 0 for "false" and STORE_FLAG_VALUE for "true".  This patch
makes that explicit using scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* target.def (cstore_mode): Return a scalar_int_mode.
* doc/tm.texi: Regenerate.
* config/sparc/sparc.c (sparc_cstore_mode): Return a scalar_int_mode.
* targhooks.h (default_cstore_mode): Likewise.
* targhooks.c (default_cstore_mode): Likewise, using a forced
conversion.
* expmed.c (emit_cstore): Expect the target of the cstore to be
a scalar_int_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251489

[36/77] Use scalar_int_mode in the RTL iv routines

This patch changes the iv modes in rtx_iv from machine_mode
to scalar_int_mode.  It also passes the mode of the iv down
to subroutines; this avoids the previous situation in which
the mode information was sometimes lost and had to be added
by the caller on return.

Some routines already took a mode argument, but the patch
tries to standardise on passing it immediately before the
argument it describes.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* cfgloop.h (rtx_iv): Change type of extend_mode and mode to
scalar_int_mode.
(niter_desc): Likewise mode.
(iv_analyze): Add a mode parameter.
(biv_p): Likewise.
(iv_analyze_expr): Pass the mode paraeter before the rtx it describes
and change its type to scalar_int_mode.
* loop-iv.c: Update commentary at head of file.
(iv_constant): Pass the mode paraeter before the rtx it describes
and change its type to scalar_int_mode.  Remove VOIDmode handling.
(iv_subreg): Change the type of the mode parameter to scalar_int_mode.
(iv_extend): Likewise.
(shorten_into_mode): Likewise.
(iv_add): Use scalar_int_mode.
(iv_mult): Likewise.
(iv_shift): Likewise.
(canonicalize_iv_subregs): Likewise.
(get_biv_step_1): Pass the outer_mode parameter before the rtx
it describes and change its mode to scalar_int_mode.   Also change
the type of the returned inner_mode to scalar_int_mode.
(get_biv_step): Likewise, turning outer_mode from a pointer
into a direct parameter.  Update call to get_biv_step_1.
(iv_analyze_biv): Add an outer_mode parameter.  Update calls to
iv_constant and get_biv_step.
(iv_analyze_expr): Pass the mode parameter before the rtx it describes
and change its type to scalar_int_mode.  Don't initialise iv->mode
to VOIDmode and remove later checks for its still being VOIDmode.
Update calls to iv_analyze_op and iv_analyze_expr.  Check
is_a <scalar_int_mode> when changing the mode under consideration.
(iv_analyze_def): Ignore registers that don't have a scalar_int_mode.
Update call to iv_analyze_expr.
(iv_analyze_op): Add a mode parameter.  Reject subregs whose
inner register is not also a scalar_int_mode.  Update call to
iv_analyze_biv.
(iv_analyze): Add a mode parameter.  Update call to iv_analyze_op.
(biv_p): Add a mode parameter.  Update call to iv_analyze_biv.
(iv_number_of_iterations): Use is_a <scalar_int_mode> instead of
separate mode class checks.  Update calls to iv_analyze.  Remove
fix-up of VOIDmodes after iv_analyze_biv.
* loop-unroll.c (analyze_iv_to_split_insn): Reject registers that
don't have a scalar_int_mode.  Update call to biv_p.

From-SVN: r251488

[35/77] Add uses of as_a <scalar_int_mode>

This patch adds asserting as_a <scalar_int_mode> conversions
to contexts in which the input is known to be a scalar integer mode.

In expand_divmod, op1 is always a scalar_int_mode if
op1_is_constant (but might not be otherwise).

In expand_binop, the patch reverses a < comparison in order to
avoid splitting a long line.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* cfgexpand.c (convert_debug_memory_address): Use
as_a <scalar_int_mode>.
* combine.c (expand_compound_operation): Likewise.
(make_extraction): Likewise.
(change_zero_ext): Likewise.
(simplify_comparison): Likewise.
* cse.c (cse_insn): Likewise.
* dwarf2out.c (minmax_loc_descriptor): Likewise.
(mem_loc_descriptor): Likewise.
(loc_descriptor): Likewise.
* expmed.c (init_expmed_one_mode): Likewise.
(synth_mult): Likewise.
(emit_store_flag_1): Likewise.
(expand_divmod): Likewise.  Use HWI_COMPUTABLE_MODE_P instead
of a comparison with size.
* expr.c (expand_assignment): Use as_a <scalar_int_mode>.
(reduce_to_bit_field_precision): Likewise.
* function.c (expand_function_end): Likewise.
* internal-fn.c (expand_arith_overflow_result_store): Likewise.
* loop-doloop.c (doloop_modify): Likewise.
* optabs.c (expand_binop): Likewise.
(expand_unop): Likewise.
(expand_copysign_absneg): Likewise.
(prepare_cmp_insn): Likewise.
(maybe_legitimize_operand): Likewise.
* recog.c (const_scalar_int_operand): Likewise.
* rtlanal.c (get_address_mode): Likewise.
* simplify-rtx.c (simplify_unary_operation_1): Likewise.
(simplify_cond_clz_ctz): Likewise.
* tree-nested.c (get_nl_goto_field): Likewise.
* tree.c (build_vector_type_for_mode): Likewise.
* var-tracking.c (use_narrower_mode): Likewise.

gcc/c-family/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* c-common.c (c_common_type_for_mode): Use as_a <scalar_int_mode>.

gcc/lto/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* lto-lang.c (lto_type_for_mode): Use as_a <scalar_int_mode>.

From-SVN: r251487

[34/77] Add a SCALAR_INT_TYPE_MODE macro

This patch adds a SCALAR_INT_TYPE_MODE macro that asserts
that the type has a scalar integer mode and returns it as
a scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* tree.h (SCALAR_INT_TYPE_MODE): New macro.
* builtins.c (expand_builtin_signbit): Use it.
* cfgexpand.c (expand_debug_expr): Likewise.
* dojump.c (do_jump): Likewise.
(do_compare_and_jump): Likewise.
* dwarf2cfi.c (expand_builtin_init_dwarf_reg_sizes): Likewise.
* expmed.c (make_tree): Likewise.
* expr.c (expand_expr_real_2): Likewise.
(expand_expr_real_1): Likewise.
(try_casesi): Likewise.
* fold-const-call.c (fold_const_call_ss): Likewise.
* fold-const.c (unextend): Likewise.
(extract_muldiv_1): Likewise.
(fold_single_bit_test): Likewise.
(native_encode_int): Likewise.
(native_encode_string): Likewise.
(native_interpret_int): Likewise.
* gimple-fold.c (gimple_fold_builtin_memset): Likewise.
* internal-fn.c (expand_addsub_overflow): Likewise.
(expand_neg_overflow): Likewise.
(expand_mul_overflow): Likewise.
(expand_arith_overflow): Likewise.
* match.pd: Likewise.
* stor-layout.c (layout_type): Likewise.
* tree-cfg.c (verify_gimple_assign_ternary): Likewise.
* tree-ssa-math-opts.c (convert_mult_to_widen): Likewise.
* tree-ssanames.c (get_range_info): Likewise.
* tree-switch-conversion.c (array_value_type) Likewise.
* tree-vect-patterns.c (vect_recog_rotate_pattern): Likewise.
(vect_recog_divmod_pattern): Likewise.
(vect_recog_mixed_size_cond_pattern): Likewise.
* tree-vrp.c (extract_range_basic): Likewise.
(simplify_float_conversion_using_ranges): Likewise.
* tree.c (int_fits_type_p): Likewise.
* ubsan.c (instrument_bool_enum_load): Likewise.
* varasm.c (mergeable_string_section): Likewise.
(narrowing_initializer_constant_valid_p): Likewise.
(output_constant): Likewise.

gcc/cp/
* cvt.c (cp_convert_to_pointer): Use SCALAR_INT_TYPE_MODE.

gcc/fortran/
* target-memory.c (size_integer): Use SCALAR_INT_TYPE_MODE.
(size_logical): Likewise.

gcc/objc/
* objc-encoding.c (encode_type): Use SCALAR_INT_TYPE_MODE.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251486

[33/77] Add a NARROWEST_INT_MODE macro

This patch replaces uses of GET_CLASS_NARROWEST_MODE (MODE_INT) with a
new NARROWEST_INT_MODE macro, which has type scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (NARROWEST_INT_MODE): New macro.
* expr.c (alignment_for_piecewise_move): Use it instead of
GET_CLASS_NARROWEST_MODE (MODE_INT).
(push_block): Likewise.
* stor-layout.c (bit_field_mode_iterator::bit_field_mode_iterator):
Likewise.
* tree-vrp.c (simplify_float_conversion_using_ranges): Likewise.

gcc/ada/
* gcc-interface/decl.c (validate_size): Use NARROWEST_INT_MODE
instead of GET_CLASS_NARROWEST_MODE (MODE_INT).

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251485

[32/77] Check is_a <scalar_int_mode> before calling valid_pointer_mode

A future patch will make valid_pointer_mode take a scalar_int_mode
instead of a machine_mode.  is_a <...> rather than as_a <...> is
needed here because we're checking a mode supplied by the user.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/c-family/
* c-attribs.c (handle_mode_attribute): Check for a scalar_int_mode
before calling targetm.addr_space.valid_pointer_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251484

[31/77] Use scalar_int_mode for move2add

The postreload move2add optimisations are specific to scalar
integers.  This patch adds an explicit check to the main guarding
"if" and propagates the information through subroutines.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* postreload.c (move2add_valid_value_p): Change the type of the
mode parameter to scalar_int_mode.
(move2add_use_add2_insn): Add a mode parameter and use it instead
of GET_MODE (reg).
(move2add_use_add3_insn): Likewise.
(reload_cse_move2add): Update accordingly.

From-SVN: r251483

[30/77] Use scalar_int_mode for doubleword splits

This patch uses is_a <scalar_int_mode> in a couple of places that
were splitting doubleword integer operations into word_mode
operations.  It also uses scalar_int_mode in the expand_expr_real_2
handling of doubleword shifts.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* expr.c (expand_expr_real_2): Use scalar_int_mode for the
double-word mode.
* lower-subreg.c (resolve_shift_zext): Use is_a <scalar_int_mode>.
* optabs.c (expand_unop): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251482

[29/77] Make some *_loc_descriptor helpers take scalar_int_mode

The *_loc_descriptor routines for clz, popcount, bswap and rotate
all required SCALAR_INT_MODE_P.  This patch moves the checks into
the caller (mem_loc_descriptor) so that the types of the mode
parameters can be scalar_int_mode instead of machine_mode.

The MOD handling in mem_loc_descriptor is also specific to
scalar integer modes.  Adding an explicit check allows
typed_binop to take a scalar_int_mode too.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* dwarf2out.c (typed_binop): Change mode parameter to scalar_int_mode.
(clz_loc_descriptor): Likewise.  Remove SCALAR_INT_MODE_P check.
(popcount_loc_descriptor): Likewise.
(bswap_loc_descriptor): Likewise.
(rotate_loc_descriptor): Likewise.
(mem_loc_descriptor): Add is_a <scalar_int_mode> checks before
calling the functions above.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251481

[28/77] Use is_a <scalar_int_mode> for miscellaneous types of test

This patch adds is_a <scalar_int_mode> checks to various places
that were explicitly or implicitly restricted to integers already,
in cases where adding an explicit is_a <scalar_int_mode> is useful
for later patches.

In simplify_if_then_else, the:

  GET_MODE (XEXP (XEXP (t, 0), N))

expressions were equivalent to:

  GET_MODE (XEXP (t, 0))

due to the type of operation.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (sign_extend_short_imm): Add is_a <scalar_int_mode>
checks.
(try_combine): Likewise.
(simplify_if_then_else): Likewise.
* cse.c (cse_insn): Likewise.
* dwarf2out.c (mem_loc_descriptor): Likewise.
* emit-rtl.c (gen_lowpart_common): Likewise.
* simplify-rtx.c (simplify_truncation): Likewise.
(simplify_binary_operation_1): Likewise.
(simplify_const_relational_operation): Likewise.
(simplify_ternary_operation): Likewise.
* tree-ssa-loop-ivopts.c (force_expr_to_var_cost): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251480

[27/77] Use is_a <scalar_int_mode> before LOAD_EXTEND_OP

This patch adds is_a <scalar_int_mode> checks before load_extend_op/
LOAD_EXTEND_OP calls, if that becomes useful for later patches.
(load_extend_op will return UNKNOWN for any other type of mode.)

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* cse.c (cse_insn): Add is_a <scalar_int_mode> checks.
* reload.c (push_reload): Likewise.
(find_reloads): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251479

[26/77] Use is_a <scalar_int_mode> in subreg/extract simplifications

This patch adds is_a <scalar_int_mode> checks to various places that
were optimising subregs or extractions in ways that only made sense
for scalar integers.  Often the subreg transformations were looking
for extends, truncates or shifts and trying to remove the subreg, which
wouldn't be correct if the SUBREG_REG was a vector rather than a scalar.

The simplify_binary_operation_1 part also removes a redundant:

  GET_MODE (opleft) == GET_MODE (XEXP (opright, 0))

since this must be true for:

  (ior A (lshifrt B ...))  A == opleft, B == XEXP (opright, 0)

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (find_split_point): Add is_a <scalar_int_mode> checks.
(make_compound_operation_int): Likewise.
(change_zero_ext): Likewise.
* expr.c (convert_move): Likewise.
(convert_modes): Likewise.
* fwprop.c (forward_propagate_subreg): Likewise.
* loop-iv.c (get_biv_step_1): Likewise.
* optabs.c (widen_operand): Likewise.
* postreload.c (move2add_valid_value_p): Likewise.
* recog.c (simplify_while_replacing): Likewise.
* simplify-rtx.c (simplify_unary_operation_1): Likewise.
(simplify_binary_operation_1): Likewise.  Remove redundant
mode equality check.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251478

[25/77] Use is_a <scalar_int_mode> for bitmask optimisations

Explicitly check for scalar_int_mode in code that maps arithmetic
to full-mode bit operations.  These operations wouldn't work correctly
for vector modes, for example.  In many cases this is enforced also by
checking whether an operand is CONST_INT_P, but there were other cases
where the condition is more indirect.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* combine.c (combine_simplify_rtx): Add checks for
is_a <scalar_int_mode>.
(simplify_if_then_else): Likewise.
(make_field_assignment): Likewise.
(simplify_comparison): Likewise.
* ifcvt.c (noce_try_bitop): Likewise.
* loop-invariant.c (canonicalize_address_mult): Likewise.
* simplify-rtx.c (simplify_unary_operation_1): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251477

[24/77] Replace a != BLKmode check with is_a <scalar_int_mode>

This patch replaces a check against BLKmode with a check
of is_a <scalar_int_mode>, in a case where scalar integer
modes were the only useful alternatives left.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* gimple-fold.c (gimple_fold_builtin_memory_op): Use
is_a <scalar_int_mode> instead of != BLKmode.

From-SVN: r251476

[23/77] Replace != VOIDmode checks with is_a <scalar_int_mode>

This patch replaces some checks against VOIDmode with checks
of is_a <scalar_int_mode>, in cases where scalar integer modes
were the only useful alternatives left.

gcc/
2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

* cfgexpand.c (expand_debug_expr): Use is_a <scalar_int_mode>
instead of != VOIDmode.
* combine.c (if_then_else_cond): Likewise.
(change_zero_ext): Likewise.
* dwarf2out.c (mem_loc_descriptor): Likewise.
(loc_descriptor): Likewise.
* rtlanal.c (canonicalize_condition): Likewise.
* simplify-rtx.c (simplify_relational_operation_1): Likewise.

From-SVN: r251475

[22/77] Replace !VECTOR_MODE_P with is_a <scalar_int_mode>

This patch replaces some checks of !VECTOR_MODE_P with checks
of is_a <scalar_int_mode>, in cases where the scalar integer
modes were the only useful alternatives left.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* simplify-rtx.c (simplify_binary_operation_1): Use
is_a <scalar_int_mode> instead of !VECTOR_MODE_P.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251474

[21/77] Replace SCALAR_INT_MODE_P checks with is_a <scalar_int_mode>

This patch replaces checks of "SCALAR_INT_MODE_P (...)" with
"is_a <scalar_int_mode> (..., &var)" in cases where it becomes
useful to refer to the mode as a scalar_int_mode.  It also
replaces some checks for the two constituent classes (MODE_INT
and MODE_PARTIAL_INT).

The patch also introduces is_a <scalar_int_mode> checks for some
uses of HWI_COMPUTABLE_MODE_P, which is a subcondition of
SCALAR_INT_MODE_P.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* wide-int.h (int_traits<unsigned char>) New class.
(int_traits<unsigned short>) Likewise.
* cfgexpand.c (expand_debug_expr): Use is_a <scalar_int_mode>.
Use GET_MODE_UNIT_PRECISION and remove redundant test for
SCALAR_INT_MODE_P.
* combine.c (set_nonzero_bits_and_sign_copies): Use
is_a <scalar_int_mode>.
(find_split_point): Likewise.
(combine_simplify_rtx): Likewise.
(simplify_logical): Likewise.
(expand_compound_operation): Likewise.
(expand_field_assignment): Likewise.
(make_compound_operation): Likewise.
(extended_count): Likewise.
(change_zero_ext): Likewise.
(simplify_comparison): Likewise.
* dwarf2out.c (scompare_loc_descriptor): Likewise.
(ucompare_loc_descriptor): Likewise.
(minmax_loc_descriptor): Likewise.
(mem_loc_descriptor): Likewise.
(loc_descriptor): Likewise.
* expmed.c (init_expmed_one_mode): Likewise.
* lra-constraints.c (lra_constraint_offset): Likewise.
* optabs.c (prepare_libcall_arg): Likewise.
* postreload.c (move2add_note_store): Likewise.
* reload.c (operands_match_p): Likewise.
* rtl.h (load_extend_op): Likewise.
* rtlhooks.c (gen_lowpart_general): Likewise.
* simplify-rtx.c (simplify_truncation): Likewise.
(simplify_unary_operation_1): Likewise.
(simplify_binary_operation_1): Likewise.
(simplify_const_binary_operation): Likewise.
(simplify_const_relational_operation): Likewise.
(simplify_subreg): Likewise.
* stor-layout.c (bitwise_mode_for_mode): Likewise.
* var-tracking.c (adjust_mems): Likewise.
(prepare_call_arguments): Likewise.

gcc/ada/
* gcc-interface/decl.c (check_ok_for_atomic_type): Use
is_a <scalar_int_mode>.
* gcc-interface/trans.c (Pragma_to_gnu): Likewise.
* gcc-interface/utils.c (gnat_type_for_mode): Likewise.

gcc/fortran/
* trans-types.c (gfc_type_for_mode): Use is_a <scalar_int_mode>.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251473

[20/77] Replace MODE_INT checks with is_int_mode

Replace checks of "GET_MODE_CLASS (...) == MODE_INT" with
"is_int_mode (..., &var)", in cases where it becomes useful
to refer to the mode as a scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (is_int_mode): New fuction.
* combine.c (find_split_point): Use it.
(combine_simplify_rtx): Likewise.
(simplify_if_then_else): Likewise.
(simplify_set): Likewise.
(simplify_shift_const_1): Likewise.
(simplify_comparison): Likewise.
* config/aarch64/aarch64.c (aarch64_rtx_costs): Likewise.
* cse.c (notreg_cost): Likewise.
(cse_insn): Likewise.
* cselib.c (cselib_lookup_1): Likewise.
* dojump.c (do_jump_1): Likewise.
(do_compare_rtx_and_jump): Likewise.
* dse.c (get_call_args): Likewise.
* dwarf2out.c (rtl_for_decl_init): Likewise.
(native_encode_initializer): Likewise.
* expmed.c (emit_store_flag_1): Likewise.
(emit_store_flag): Likewise.
* expr.c (convert_modes): Likewise.
(store_field): Likewise.
(expand_expr_real_1): Likewise.
* fold-const.c (fold_read_from_constant_string): Likewise.
* gimple-ssa-sprintf.c (get_format_string): Likewise.
* optabs-libfuncs.c (gen_int_libfunc): Likewise.
* optabs.c (expand_binop): Likewise.
(expand_unop): Likewise.
(expand_abs_nojump): Likewise.
(expand_one_cmpl_abs_nojump): Likewise.
* simplify-rtx.c (mode_signbit_p): Likewise.
(val_signbit_p): Likewise.
(val_signbit_known_set_p): Likewise.
(val_signbit_known_clear_p): Likewise.
(simplify_relational_operation_1): Likewise.
* tree.c (vector_type_mode): Likewise.

gcc/go/
* go-lang.c (go_langhook_type_for_mode): Use is_int_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251472

[19/77] Add a smallest_int_mode_for_size helper function

This patch adds a wrapper around smallest_mode_for_size
for cases in which the mode class is MODE_INT.  Unlike
(int_)mode_for_size, smallest_mode_for_size always returns
a mode of the specified class, asserting if no such mode exists.
smallest_int_mode_for_size therefore returns a scalar_int_mode
rather than an opt_scalar_int_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (smallest_mode_for_size): Fix formatting.
(smallest_int_mode_for_size): New function.
* cfgexpand.c (expand_debug_expr): Use smallest_int_mode_for_size
instead of smallest_mode_for_size.
* combine.c (make_extraction): Likewise.
* config/arc/arc.c (arc_expand_movmem): Likewise.
* config/arm/arm.c (arm_expand_divmod_libfunc): Likewise.
* config/i386/i386.c (ix86_get_mask_mode): Likewise.
* config/s390/s390.c (s390_expand_insv): Likewise.
* config/sparc/sparc.c (assign_int_registers): Likewise.
* config/spu/spu.c (spu_function_value): Likewise.
(spu_function_arg): Likewise.
* coverage.c (get_gcov_type): Likewise.
(get_gcov_unsigned_t): Likewise.
* dse.c (find_shift_sequence): Likewise.
* expmed.c (store_bit_field_1): Likewise.
* expr.c (convert_move): Likewise.
(store_field): Likewise.
* internal-fn.c (expand_arith_overflow): Likewise.
* optabs-query.c (get_best_extraction_insn): Likewise.
* optabs.c (expand_twoval_binop_libfunc): Likewise.
* stor-layout.c (layout_type): Likewise.
(initialize_sizetypes): Likewise.
* targhooks.c (default_get_mask_mode): Likewise.
* tree-ssa-loop-manip.c (canonicalize_loop_ivs): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251471

[18/77] Make int_mode_for_mode return an opt_scalar_int_mode

Also use int_mode_for_mode instead of (int_)mode_for_size
in cases where the requested size was the bitsize of an
existing mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (opt_mode::else_blk): New function.
(int_mode_for_mode): Declare.
* stor-layout.c (int_mode_for_mode): Return an opt_scalar_int_mode.
* builtins.c (expand_builtin_signbit): Adjust for new int_mode_for_mode
return type.
* cfgexpand.c (expand_debug_expr): Likewise.
* combine.c (gen_lowpart_or_truncate): Likewise.
(gen_lowpart_for_combine): Likewise.
* config/aarch64/aarch64.c (aarch64_emit_approx_sqrt): Likewise.
* config/avr/avr.c (avr_to_int_mode): Likewise.
(avr_out_plus_1): Likewise.
(avr_out_plus): Likewise.
(avr_out_round): Likewise.
* config/i386/i386.c (ix86_split_to_parts): Likewise.
* config/s390/s390.c (s390_expand_vec_compare_cc): Likewise.
(s390_expand_vcond): Likewise.
* config/spu/spu.c (spu_split_immediate): Likewise.
(spu_expand_mov): Likewise.
* dse.c (get_stored_val): Likewise.
* expmed.c (store_bit_field_1): Likewise.
(convert_extracted_bit_field): Use int_mode_for_mode instead of
int_mode_for_size.
(extract_bit_field_1): Adjust for new int_mode_for_mode return type.
(extract_low_bits): Likewise.
* expr.c (emit_group_load_1): Likewise.  Separate out the BLKmode
handling rather than repeating the check.
(emit_group_store): Likewise.
(emit_move_via_integer): Adjust for new int_mode_for_mode return type.
* optabs.c (expand_absneg_bit): Likewise.
(expand_copysign_absneg): Likewise.
(expand_copysign_bit): Likewise.
* tree-if-conv.c (ifcvt_can_use_mask_load_store): Likewise.
* tree-vect-slp.c (vect_transform_slp_perm_load): Likewise.
* tree-vect-stmts.c (vect_gen_perm_mask_any): Likewise.
* var-tracking.c (prepare_call_arguments):  Likewise.
* config/powerpcspe/powerpcspe.c (rs6000_do_expand_vec_perm): Use
int_mode_for_mode instead of mode_for_size.
* config/rs6000/rs6000.c (rs6000_do_expand_vec_perm): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251470

[17/77] Add an int_mode_for_size helper function

This patch adds a wrapper around mode_for_size for cases in which
the mode class is MODE_INT (the commonest case).  The return type
can then be an opt_scalar_int_mode instead of a machine_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (int_mode_for_size): New function.
* builtins.c (set_builtin_user_assembler_name): Use int_mode_for_size
instead of mode_for_size.
* calls.c (save_fixed_argument_area): Likewise.  Make use of BLKmode
explicit.
* combine.c (expand_field_assignment): Use int_mode_for_size
instead of mode_for_size.
(make_extraction): Likewise.
(simplify_shift_const_1): Likewise.
(simplify_comparison): Likewise.
* dojump.c (do_jump): Likewise.
* dwarf2out.c (mem_loc_descriptor): Likewise.
* emit-rtl.c (init_derived_machine_modes): Likewise.
* expmed.c (flip_storage_order): Likewise.
(convert_extracted_bit_field): Likewise.
* expr.c (copy_blkmode_from_reg): Likewise.
* graphite-isl-ast-to-gimple.c (max_mode_int_precision): Likewise.
* internal-fn.c (expand_mul_overflow): Likewise.
* lower-subreg.c (simple_move): Likewise.
* optabs-libfuncs.c (init_optabs): Likewise.
* simplify-rtx.c (simplify_unary_operation_1): Likewise.
* tree.c (vector_type_mode): Likewise.
* tree-ssa-strlen.c (handle_builtin_memcmp): Likewise.
* tree-vect-data-refs.c (vect_lanes_optab_supported_p): Likewise.
* tree-vect-generic.c (expand_vector_parallel): Likewise.
* tree-vect-stmts.c (vectorizable_load): Likewise.
(vectorizable_store): Likewise.

gcc/ada/
* gcc-interface/decl.c (gnat_to_gnu_entity): Use int_mode_for_size
instead of mode_for_size.
(gnat_to_gnu_subprog_type): Likewise.
* gcc-interface/utils.c (make_type_from_size): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251469

[16/77] Add scalar_int_mode_pod

This patch adds a POD class for scalar integers, as an instance
of a new pod_mode template.  Later patches will use pod_mode in
situations that really do need to be POD; this patch is simply
using PODs to remove load-time initialisation.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* coretypes.h (pod_mode): New type.
(scalar_int_mode_pod): New typedef.
* machmode.h (pod_mode): New class.
(int_n_data_t::m): Change type to scalar_int_mode_pod.
* genmodes.c (emit_mode_int_n): Update accordingly.
* lower-subreg.h (target_lower_subreg): Change type to
scalar_int_mode_pod.
* gdbhooks.py (build_pretty_printer): Handle pod_mode and
scalar_int_mode_pod.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251468

[15/77] Add scalar_int_mode

Similar to the previous scalar_float_mode patch, but for modes that
satisfy SCALAR_INT_MODE_P.  There are very many uses of scalar integers,
so this patch only makes a token change to the types of byte_mode,
word_mode, ptr_mode and rs6000_pmode.  The next patches in the series
gradually replace more uses.

The patch also removes and adds casts to some target-specific code
due to the new types of SImode, DImode and Pmode.

The as_a <scalar_int_mode> goes away in a later patch.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* config/powerpcspe/powerpcspe.h (rs6000_pmode): Change type from
machine_mode to scalar_int_mode.
* config/powerpcspe/powerpcspe.c (rs6000_pmode): Likewise.
(rs6000_option_override_internal): Remove cast to int.
* config/rs6000/rs6000.h (rs6000_pmode): Change type from
machine_mode to scalar_int_mode.
* config/rs6000/rs6000.c (rs6000_pmode): Likewise.
(rs6000_option_override_internal): Remove cast to int.
* config/s390/s390.h (Pmode): Remove cast to machine_mode.
* config/epiphany/epiphany.h (RTX_OK_FOR_OFFSET_P): Add cast
to machine_mode.
* config/s390/s390.c (s390_expand_builtin): Likewise.
* coretypes.h (scalar_int_mode): New type.
(opt_scalar_int_mode): New typedef.
* machmode.h (scalar_int_mode): New class.
(scalar_int_mode::includes_p): New function.
(byte_mode): Change type to scalar_int_mode.
(word_mode): Likewise.
(ptr_mode): Likewise.
* emit-rtl.c (byte_mode): Likewise.
(word_mode): Likewise.
(ptr_mode): Likewise.
(init_derived_machine_modes): Update accordingly.
* genmodes.c (get_mode_class): Return scalar_int_mode for MODE_INT
and MODE_PARTIAL_INT.
* gdbhooks.py (build_pretty_printer): Handle scalar_int_mode and
opt_scalar_int_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251467

[14/77] Make libgcc_floating_mode_supported_p take a scalar_float_mode

As per subject.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* target.def (libgcc_floating_mode_supported_p): Take a
scalar_float_mode.
* doc/tm.texi: Regenerate.
* targhooks.h (default_libgcc_floating_mode_supported_p): Take a
scalar_float_mode.
* targhooks.c (default_libgcc_floating_mode_supported_p): Likewise.
* config/aarch64/aarch64.c (aarch64_libgcc_floating_mode_supported_p):
Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251466

[13/77] Make floatn_mode return an opt_scalar_float_mode

As per subject.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* target.def (default_floatn_mode): Return an opt_scalar_float_mode.
* doc/tm.texi: Regenerate.
* config/arm/arm.c (arm_floatn_mode): Return an opt_scalar_float_mode.
* config/powerpcspe/powerpcspe.c (rs6000_floatn_mode): Likewise.
* config/rs6000/rs6000.c (rs6000_floatn_mode): Likewise.
* targhooks.h (default_floatn_mode): Likewise.
* targhooks.c (default_floatn_mode): Likewise.
* tree.c (build_common_tree_nodes): Update accordingly.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251465

[12/77] Use opt_scalar_float_mode when iterating over float modes

This means that we know when accessing the modes that the size is
a compile-time constant, even for SVE.  It also enables stricter
type safety in later patches.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (mode_iterator::start): Provide overload for opt_modes.
(mode_iterator::iterate_p): Likewise.
(mode_iterator::get_wider): Likewise.
* expr.c (init_expr_target): Use opt_scalar_float_mode.

gcc/ada/
* gcc-interface/misc.c (fp_prec_to_size): Use opt_scalar_float_mode.
(fp_size_to_prec): Likewise.

gcc/c-family/
* c-cppbuiltin.c (c_cpp_builtins): Use opt_scalar_float_mode.

gcc/fortran/
* trans-types.c (gfc_init_kinds): Use opt_scalar_float_mode
and FOR_EACH_MODE_IN_CLASS.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251464

[11/77] Add a float_mode_for_size helper function

This provides a type-safe way to ask for a float mode and get it as a
scalar_float_mode.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* coretypes.h (opt_scalar_float_mode): New typedef.
* machmode.h (float_mode_for_size): New function.
* emit-rtl.c (double_mode): Delete.
(init_emit_once): Use float_mode_for_size.
* stor-layout.c (layout_type): Likewise.
* gdbhooks.py (build_pretty_printer): Handle opt_scalar_float_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251463

Fix test-case vrp104.c.

2017-08-30  Martin Liska  <mliska@suse.cz>

* gcc.dg/tree-ssa/vrp104.c: Change dump file name.

From-SVN: r251462

[10/77] Make assemble_real take a scalar_float_mode

As per subject.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* output.h (assemble_real): Take a scalar_float_mode.
* config/arm/arm.c (arm_assemble_integer): Update accordingly.
* config/arm/arm.md (consttable_4): Likewise.
(consttable_8): Likewise.
(consttable_16): Likewise.
* config/mips/mips.md (consttable_float): Likewise.
* config/s390/s390.c (s390_output_pool_entry): Likewise.
* varasm.c (assemble_real): Take a scalar_float_mode.
(output_constant_pool_2): Update accordingly.
(output_constant): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251461

[9/77] Add SCALAR_FLOAT_TYPE_MODE

This patch adds a macro that extracts the TYPE_MODE and forcibly
converts it to a scalar_float_mode.  The forcible conversion
includes a gcc_checking_assert that the mode is a SCALAR_FLOAT_MODE_P.

This becomes important as more static type checking is added by
later patches.  It has the additional benefit of bypassing the
VECTOR_TYPE_P (...) ? vector_type_mode (...) : ... condition
in TYPE_MODE; in release builds the new macro is a simple
field access.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* tree.h (SCALAR_FLOAT_TYPE_MODE): New macro.
* builtins.c (expand_builtin_signbit): Use it instead of TYPE_MODE.
* fold-const.c (fold_convert_const_real_from_fixed): Likewise.
(native_encode_real): Likewise.
(native_interpret_real): Likewise.
* hsa-brig.c (emit_immediate_scalar_to_buffer): Likewise.
* tree-vrp.c (simplify_float_conversion_using_ranges): Likewise.

gcc/cp/
* mangle.c (write_real_cst): Use SCALAR_FLOAT_TYPE_MODE
instead of TYPE_MODE.

gcc/fortran/
* target-memory.c (size_float): Use SCALAR_FLOAT_TYPE_MODE
instead of TYPE_MODE.

gcc/objc/
* objc-encoding.c (encode_type): Use SCALAR_FLOAT_TYPE_MODE
instead of TYPE_MODE.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251460

[8/77] Simplify gen_trunc/extend_conv_libfunc

Replace checks of:

  GET_MODE_CLASS (fmode) != MODE_FLOAT && !DECIMAL_FLOAT_MODE_P (fmode)

with !is_a <scalar_float_mode> and use MODE_CLASS equality/inequality
instead of:

  (GET_MODE_CLASS (tmode) == MODE_FLOAT && DECIMAL_FLOAT_MODE_P (fmode))
  || (GET_MODE_CLASS (fmode) == MODE_FLOAT && DECIMAL_FLOAT_MODE_P (tmode))

and:

  (GET_MODE_CLASS (tmode) == MODE_FLOAT
   && GET_MODE_CLASS (fmode) == MODE_FLOAT)
  || (DECIMAL_FLOAT_MODE_P (fmode) && DECIMAL_FLOAT_MODE_P (tmode))

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* optabs-libfuncs.c (gen_trunc_conv_libfunc): Use is_a
<scalar_float_mode>.  Simplify.
(gen_extend_conv_libfunc): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251459

[7/77] Add scalar_float_mode

This patch adds a scalar_float_mode class, which wraps a mode enum
that is known to satisfy SCALAR_FLOAT_MODE_P.  Things like "SFmode"
now give a scalar_float_mode object instead of a machine_mode.
This in turn needs a change to the real.h format_helper, so that
it can accept both machine_modes and scalar_float_modes.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* coretypes.h (scalar_float_mode): New type.
* machmode.h (mode_traits::from_int): Use machine_mode if
USE_ENUM_MODES is defined.
(is_a): New function.
(as_a): Likewise.
(dyn_cast): Likewise.
(scalar_float_mode): New class.
(scalar_float_mode::includes_p): New function.
(is_float_mode): Likewise.
* gdbhooks.py (MachineModePrinter): New class.
(build_pretty_printer): Use it for scalar_float_mode.
* real.h (FLOAT_MODE_FORMAT): Use as_a <scalar_float_mode>.
(format_helper::format_helper): Turn into a template.
* genmodes.c (get_mode_class): New function.
(emit_insn_modes_h): Give modes the class returned by get_mode_class,
or machine_mode if none.
* config/aarch64/aarch64.c (aarch64_simd_valid_immediate): Use
as_a <scalar_float_mode>.
* dwarf2out.c (mem_loc_descriptor): Likewise.
(insert_float): Likewise.
(add_const_value_attribute): Likewise.
* simplify-rtx.c (simplify_immed_subreg): Likewise.
* optabs.c (expand_absneg_bit): Take a scalar_float_mode.
(expand_unop): Update accordingly.
(expand_abs_nojump): Likewise.
(expand_copysign_absneg): Take a scalar_float_mode.
(expand_copysign_bit): Likewise.
(expand_copysign): Update accordingly.

gcc/ada/
* gcc-interface/utils.c (gnat_type_for_mode): Use is_a
<scalar_float_mode> instead of SCALAR_FLOAT_MODE_P.

gcc/go/
* go-lang.c (go_langhook_type_for_mode): Use is_float_mode.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251458

[6/77] Make GET_MODE_WIDER return an opt_mode

GET_MODE_WIDER previously returned VOIDmode if no wider mode existed.
That would cause problems with stricter mode classes, since VOIDmode
isn't for example a valid scalar integer or floating-point mode.
This patch instead makes it return a new opt_mode<T> class, which
holds either a T or nothing.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* coretypes.h (opt_mode): New class.
* machmode.h (opt_mode): Likewise.
(opt_mode::else_void): New function.
(opt_mode::require): Likewise.
(opt_mode::exists): Likewise.
(GET_MODE_WIDER_MODE): Turn into a function and return an opt_mode.
(GET_MODE_2XWIDER_MODE): Likewise.
(mode_iterator::get_wider): Update accordingly.
(mode_iterator::get_2xwider): Likewise.
(mode_iterator::get_known_wider): Likewise, turning into a template.
* combine.c (make_extraction): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
* config/cr16/cr16.h (LONG_REG_P): Likewise.
* rtlanal.c (init_num_sign_bit_copies_in_rep): Likewise.
* config/c6x/c6x.c (c6x_rtx_costs): Update use of
GET_MODE_2XWIDER_MODE, forcing a wider mode to exist.
* lower-subreg.c (init_lower_subreg): Likewise.
* optabs-libfuncs.c (init_sync_libfuncs_1): Likewise, but not
on the final iteration.
* config/i386/i386.c (ix86_expand_set_or_movmem): Check whether
a wider mode exists before asking for a move pattern.
(get_mode_wider_vector): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
(expand_vselect_vconcat): Update use of GET_MODE_2XWIDER_MODE,
returning false if no such mode exists.
* config/ia64/ia64.c (expand_vselect_vconcat): Likewise.
* config/mips/mips.c (mips_expand_vselect_vconcat): Likewise.
* expmed.c (init_expmed_one_mode): Update use of GET_MODE_WIDER_MODE.
Avoid checking for a MODE_INT if we already know the mode is not a
SCALAR_INT_MODE_P.
(extract_high_half): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
(expmed_mult_highpart_optab): Likewise.
(expmed_mult_highpart): Likewise.
* expr.c (expand_expr_real_2): Update use of GET_MODE_WIDER_MODE,
using else_void.
* lto-streamer-in.c (lto_input_mode_table): Likewise.
* optabs-query.c (find_widening_optab_handler_and_mode): Likewise.
* stor-layout.c (bit_field_mode_iterator::next_mode): Likewise.
* internal-fn.c (expand_mul_overflow): Update use of
GET_MODE_2XWIDER_MODE.
* omp-low.c (omp_clause_aligned_alignment): Likewise.
* tree-ssa-math-opts.c (convert_mult_to_widen): Update use of
GET_MODE_WIDER_MODE.
(convert_plusminus_to_widen): Likewise.
* tree-switch-conversion.c (array_value_type): Likewise.
* var-tracking.c (emit_note_insn_var_location): Likewise.
* tree-vrp.c (simplify_float_conversion_using_ranges): Likewise.
Return false inside rather than outside the loop if no wider mode
exists
* optabs.c (expand_binop): Update use of GET_MODE_WIDER_MODE
and GET_MODE_2XWIDER_MODE
(can_compare_p): Use else_void.
* gdbhooks.py (OptMachineModePrinter): New class.
(build_pretty_printer): Use it for opt_mode.

gcc/ada/
* gcc-interface/decl.c (validate_size): Update use of
GET_MODE_WIDER_MODE, forcing a wider mode to exist.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251457

[5/77] Small tweak to array_value_type

Store the type mode in a variable so that a later,
more mechanical patch can change its type.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* tree-switch-conversion.c (array_value_type): Only read TYPE_MODE
once.  Use get_narrowest_mode instead of GET_CLASS_NARROWEST_MODE.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251456

[4/77] Add FOR_EACH iterators for modes

The new iterators are:

- FOR_EACH_MODE_IN_CLASS: iterate over all the modes in a mode class.

- FOR_EACH_MODE_FROM: iterate over all the modes in a class,
  starting at a given mode.

- FOR_EACH_WIDER_MODE: iterate over all the modes in a class,
  starting at the next widest mode after a given mode.

- FOR_EACH_2XWIDER_MODE: same, but considering only modes that
  are two times wider than the previous mode.

- FOR_EACH_MODE_UNTIL: iterate over all the modes in a class until
  a given mode is reached.

- FOR_EACH_MODE: iterate over all the modes in a class between
  two given modes, inclusive of the first but not the second.

These help with the stronger type checking added by later patches,
since every new mode will be in the same class as the previous one.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
            Alan Hayward  <alan.hayward@arm.com>
            David Sherwood  <david.sherwood@arm.com>

gcc/
* machmode.h (mode_traits): New structure.
(get_narrowest_mode): New function.
(mode_iterator::start): Likewise.
(mode_iterator::iterate_p): Likewise.
(mode_iterator::get_wider): Likewise.
(mode_iterator::get_known_wider): Likewise.
(mode_iterator::get_2xwider): Likewise.
(FOR_EACH_MODE_IN_CLASS): New mode iterator.
(FOR_EACH_MODE): Likewise.
(FOR_EACH_MODE_FROM): Likewise.
(FOR_EACH_MODE_UNTIL): Likewise.
(FOR_EACH_WIDER_MODE): Likewise.
(FOR_EACH_2XWIDER_MODE): Likewise.
* builtins.c (expand_builtin_strlen): Use new mode iterators.
* combine.c (simplify_comparison): Likewise
* config/i386/i386.c (type_natural_mode): Likewise.
* cse.c (cse_insn): Likewise.
* dse.c (find_shift_sequence): Likewise.
* emit-rtl.c (init_derived_machine_modes): Likewise.
(init_emit_once): Likewise.
* explow.c (hard_function_value): Likewise.
* expmed.c (extract_fixed_bit_field_1): Likewise.
(extract_bit_field_1): Likewise.
(expand_divmod): Likewise.
(emit_store_flag_1): Likewise.
* expr.c (init_expr_target): Likewise.
(convert_move): Likewise.
(alignment_for_piecewise_move): Likewise.
(widest_int_mode_for_size): Likewise.
(emit_block_move_via_movmem): Likewise.
(copy_blkmode_to_reg): Likewise.
(set_storage_via_setmem): Likewise.
(compress_float_constant): Likewise.
* omp-low.c (omp_clause_aligned_alignment): Likewise.
* optabs-query.c (get_best_extraction_insn): Likewise.
* optabs.c (expand_binop): Likewise.
(expand_twoval_unop): Likewise.
(expand_twoval_binop): Likewise.
(widen_leading): Likewise.
(widen_bswap): Likewise.
(expand_parity): Likewise.
(expand_unop): Likewise.
(prepare_cmp_insn): Likewise.
(prepare_float_lib_cmp): Likewise.
(expand_float): Likewise.
(expand_fix): Likewise.
(expand_sfix_optab): Likewise.
* postreload.c (move2add_use_add2_insn): Likewise.
* reg-stack.c (reg_to_stack): Likewise.
* reginfo.c (choose_hard_reg_mode): Likewise.
* rtlanal.c (init_num_sign_bit_copies_in_rep): Likewise.
* stor-layout.c (mode_for_size): Likewise.
(smallest_mode_for_size): Likewise.
(mode_for_vector): Likewise.
(finish_bitfield_representative): Likewise.
* tree-ssa-math-opts.c (target_supports_divmod_p): Likewise.
* tree-vect-generic.c (type_for_widest_vector_mode): Likewise.
* tree-vect-stmts.c (vectorizable_conversion): Likewise.
* var-tracking.c (prepare_call_arguments): Likewise.

gcc/ada/
* gcc-interface/misc.c (fp_prec_to_size): Use new mode iterators.
(fp_size_to_prec): Likewise.

gcc/c-family/
* c-common.c (c_common_fixed_point_type_for_size): Use new mode
iterators.
* c-cppbuiltin.c (c_cpp_builtins): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251455

[3/77] Allow machine modes to be classes

This patch makes various changes that allow modes like SImode to be
classes rather than enums.

Firstly, it adds inline functions for all mode size properties,
with the macros being simple wrappers around them.  This is necessary
for the __builtin_constant_p trick to continue working effectively when
the mode arguments are slightly more complex (but still foldable at
compile time).

These inline functions are trivial and heavily used.  There's not much
point keeping them out-of-line at -O0: if anything it would make
debugging harder rather than easier, and it would also slow things down.
The patch therefore marks them as "always_inline", if that's available.
Later patches use this approach too.

Using inline functions means that it's no longer possible to pass
an int to GET_MODE_PRECISION etc.  The Fortran and powerpcspe-c.c
parts are needed to avoid instances of that.

The patch continues to use enums for gencondmd.c, so that more
mode comparisons are integer constant expressions when checking
for always-true or always-false conditions.  This is the only
intended use of USE_ENUM_MODES.

The patch also enforces the previous replacement of case statements
by defining modes as:

  #define FOOmode ((void) 0, E_FOOmode)

This adds no overhead but makes sure that new uses of "case FOOmode:"
don't accidentally creep in when FOOmode has no specific class associated
with it.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* genconditions.c (write_header): Add a "#define USE_ENUM_MODES".
* genmodes.c (emit_insn_modes_h): Define FOOmode to E_FOOmode if
USE_ENUM_MODES is defined and to ((void) 0, E_FOOmode) otherwise.
* machmode.h (mode_size): Move earlier in file.
(mode_precision): Likewise.
(mode_inner): Likewise.
(mode_nunits): Likewise.
(mode_unit_size): Likewise.
(unit_unit_precision): Likewise.
(mode_wider): Likewise.
(mode_2xwider): Likewise.
(machine_mode): New class.
(mode_to_bytes): New function.
(mode_to_bits): Likewise.
(mode_to_precision): Likewise.
(mode_to_inner): Likewise.
(mode_to_unit_size): Likewise.
(mode_to_unit_precision): Likewise.
(mode_to_nunits): Likewise.
(GET_MODE_SIZE): Use mode_to_bytes.
(GET_MODE_BITSIZE): Use mode_to_bits.
(GET_MODE_PRECISION): Use mode_to_precision.
(GET_MODE_INNER): Use mode_to_inner.
(GET_MODE_UNIT_SIZE): Use mode_to_unit_size.
(GET_MODE_UNIT_PRECISION): Use mode_to_unit_precision.
(GET_MODE_NUNITS): Use mode_to_nunits.
* system.h (ALWAYS_INLINE): New macro.
* config/powerpcspe/powerpcspe-c.c
(altivec_resolve_overloaded_builtin): Use machine_mode instead of
int for arg1_mode and arg2_mode.

gcc/fortran/
* trans-types.c (gfc_init_kinds): Use machine_mode instead of int
for "mode".

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251454

[2/77] Add an E_ prefix to case statements

All case statements need to be updated to use the prefixed names,
since the unprefixed names will eventually not be integer constant
expressions.  This patch does a mechanical substitution over the whole
codebase.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* config/aarch64/aarch64-builtins.c (aarch64_simd_builtin_std_type):
Prefix mode names with E_ in case statements.
* config/aarch64/aarch64-elf.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/aarch64/aarch64.c (aarch64_split_simd_combine): Likewise.
(aarch64_split_simd_move): Likewise.
(aarch64_gen_storewb_pair): Likewise.
(aarch64_gen_loadwb_pair): Likewise.
(aarch64_gen_store_pair): Likewise.
(aarch64_gen_load_pair): Likewise.
(aarch64_get_condition_code_1): Likewise.
(aarch64_constant_pool_reload_icode): Likewise.
(get_rsqrte_type): Likewise.
(get_rsqrts_type): Likewise.
(get_recpe_type): Likewise.
(get_recps_type): Likewise.
(aarch64_gimplify_va_arg_expr): Likewise.
(aarch64_simd_container_mode): Likewise.
(aarch64_emit_load_exclusive): Likewise.
(aarch64_emit_store_exclusive): Likewise.
(aarch64_expand_compare_and_swap): Likewise.
(aarch64_gen_atomic_cas): Likewise.
(aarch64_emit_bic): Likewise.
(aarch64_emit_atomic_swap): Likewise.
(aarch64_emit_atomic_load_op): Likewise.
(aarch64_evpc_trn): Likewise.
(aarch64_evpc_uzp): Likewise.
(aarch64_evpc_zip): Likewise.
(aarch64_evpc_ext): Likewise.
(aarch64_evpc_rev): Likewise.
(aarch64_evpc_dup): Likewise.
(aarch64_gen_ccmp_first): Likewise.
(aarch64_gen_ccmp_next): Likewise.
* config/alpha/alpha.c (alpha_scalar_mode_supported_p): Likewise.
(alpha_emit_xfloating_libcall): Likewise.
(emit_insxl): Likewise.
(alpha_arg_type): Likewise.
* config/arc/arc.c (arc_vector_mode_supported_p): Likewise.
(arc_preferred_simd_mode): Likewise.
(arc_secondary_reload): Likewise.
(get_arc_condition_code): Likewise.
(arc_print_operand): Likewise.
(arc_legitimate_constant_p): Likewise.
* config/arc/arc.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/arc/arc.md (casesi_load): Likewise.
(casesi_compact_jump): Likewise.
* config/arc/predicates.md (proper_comparison_operator): Likewise.
(cc_use_register): Likewise.
* config/arm/aout.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/arm/arm-builtins.c (arm_simd_builtin_std_type): Likewise.
(arm_init_iwmmxt_builtins): Likewise.
* config/arm/arm.c (thumb1_size_rtx_costs): Likewise.
(neon_expand_vector_init): Likewise.
(arm_attr_length_move_neon): Likewise.
(maybe_get_arm_condition_code): Likewise.
(arm_emit_vector_const): Likewise.
(arm_preferred_simd_mode): Likewise.
(arm_output_iwmmxt_tinsr): Likewise.
(thumb1_output_casesi): Likewise.
(thumb2_output_casesi): Likewise.
(arm_emit_load_exclusive): Likewise.
(arm_emit_store_exclusive): Likewise.
(arm_expand_compare_and_swap): Likewise.
(arm_evpc_neon_vuzp): Likewise.
(arm_evpc_neon_vzip): Likewise.
(arm_evpc_neon_vrev): Likewise.
(arm_evpc_neon_vtrn): Likewise.
(arm_evpc_neon_vext): Likewise.
(arm_validize_comparison): Likewise.
* config/arm/neon.md (neon_vc<cmp_op><mode>): Likewise.
* config/avr/avr-c.c (avr_resolve_overloaded_builtin): Likewise.
* config/avr/avr.c (avr_rtx_costs_1): Likewise.
* config/c6x/c6x.c (c6x_vector_mode_supported_p): Likewise.
(c6x_preferred_simd_mode): Likewise.
* config/epiphany/epiphany.c (get_epiphany_condition_code): Likewise.
(epiphany_rtx_costs): Likewise.
* config/epiphany/predicates.md (proper_comparison_operator):
Likewise.
* config/frv/frv.c (condexec_memory_operand): Likewise.
(frv_emit_move): Likewise.
(output_move_single): Likewise.
(output_condmove_single): Likewise.
(frv_hard_regno_mode_ok): Likewise.
(frv_matching_accg_mode): Likewise.
* config/h8300/h8300.c (split_adds_subs): Likewise.
(h8300_rtx_costs): Likewise.
(h8300_print_operand): Likewise.
(compute_mov_length): Likewise.
(output_logical_op): Likewise.
(compute_logical_op_length): Likewise.
(compute_logical_op_cc): Likewise.
(h8300_shift_needs_scratch_p): Likewise.
(output_a_shift): Likewise.
(compute_a_shift_length): Likewise.
(compute_a_shift_cc): Likewise.
(expand_a_rotate): Likewise.
(output_a_rotate): Likewise.
* config/i386/i386.c (classify_argument): Likewise.
(function_arg_advance_32): Likewise.
(function_arg_32): Likewise.
(function_arg_64): Likewise.
(function_value_64): Likewise.
(ix86_gimplify_va_arg): Likewise.
(ix86_legitimate_constant_p): Likewise.
(put_condition_code): Likewise.
(split_double_mode): Likewise.
(ix86_avx256_split_vector_move_misalign): Likewise.
(ix86_expand_vector_logical_operator): Likewise.
(ix86_split_idivmod): Likewise.
(ix86_expand_adjust_ufix_to_sfix_si): Likewise.
(ix86_build_const_vector): Likewise.
(ix86_build_signbit_mask): Likewise.
(ix86_match_ccmode): Likewise.
(ix86_cc_modes_compatible): Likewise.
(ix86_expand_branch): Likewise.
(ix86_expand_sse_cmp): Likewise.
(ix86_expand_sse_movcc): Likewise.
(ix86_expand_int_sse_cmp): Likewise.
(ix86_expand_vec_perm_vpermi2): Likewise.
(ix86_expand_vec_perm): Likewise.
(ix86_expand_sse_unpack): Likewise.
(ix86_expand_int_addcc): Likewise.
(ix86_split_to_parts): Likewise.
(ix86_vectorize_builtin_gather): Likewise.
(ix86_vectorize_builtin_scatter): Likewise.
(avx_vpermilp_parallel): Likewise.
(inline_memory_move_cost): Likewise.
(ix86_tieable_integer_mode_p): Likewise.
(x86_maybe_negate_const_int): Likewise.
(ix86_expand_vector_init_duplicate): Likewise.
(ix86_expand_vector_init_one_nonzero): Likewise.
(ix86_expand_vector_init_one_var): Likewise.
(ix86_expand_vector_init_concat): Likewise.
(ix86_expand_vector_init_interleave): Likewise.
(ix86_expand_vector_init_general): Likewise.
(ix86_expand_vector_set): Likewise.
(ix86_expand_vector_extract): Likewise.
(emit_reduc_half): Likewise.
(ix86_emit_i387_round): Likewise.
(ix86_mangle_type): Likewise.
(ix86_expand_round_sse4): Likewise.
(expand_vec_perm_blend): Likewise.
(canonicalize_vector_int_perm): Likewise.
(ix86_expand_vec_one_operand_perm_avx512): Likewise.
(expand_vec_perm_1): Likewise.
(expand_vec_perm_interleave3): Likewise.
(expand_vec_perm_even_odd_pack): Likewise.
(expand_vec_perm_even_odd_1): Likewise.
(expand_vec_perm_broadcast_1): Likewise.
(ix86_vectorize_vec_perm_const_ok): Likewise.
(ix86_expand_vecop_qihi): Likewise.
(ix86_expand_mul_widen_hilo): Likewise.
(ix86_expand_sse2_abs): Likewise.
(ix86_expand_pextr): Likewise.
(ix86_expand_pinsr): Likewise.
(ix86_preferred_simd_mode): Likewise.
(ix86_simd_clone_compute_vecsize_and_simdlen): Likewise.
* config/i386/sse.md (*andnot<mode>3): Likewise.
(<mask_codefor><code><mode>3<mask_name>): Likewise.
(*<code><mode>3): Likewise.
* config/ia64/ia64.c (ia64_expand_vecint_compare): Likewise.
(ia64_expand_atomic_op): Likewise.
(ia64_arg_type): Likewise.
(ia64_mode_to_int): Likewise.
(ia64_scalar_mode_supported_p): Likewise.
(ia64_vector_mode_supported_p): Likewise.
(expand_vec_perm_broadcast): Likewise.
* config/iq2000/iq2000.c (iq2000_move_1word): Likewise.
(iq2000_function_arg_advance): Likewise.
(iq2000_function_arg): Likewise.
* config/m32c/m32c.c (m32c_preferred_reload_class): Likewise.
* config/m68k/m68k.c (output_dbcc_and_branch): Likewise.
(m68k_libcall_value): Likewise.
(m68k_function_value): Likewise.
(sched_attr_op_type): Likewise.
* config/mcore/mcore.c (mcore_output_move): Likewise.
* config/microblaze/microblaze.c (microblaze_function_arg_advance):
Likewise.
(microblaze_function_arg): Likewise.
* config/mips/mips.c (mips16_build_call_stub): Likewise.
(mips_print_operand): Likewise.
(mips_mode_ok_for_mov_fmt_p): Likewise.
(mips_vector_mode_supported_p): Likewise.
(mips_preferred_simd_mode): Likewise.
(mips_expand_vpc_loongson_even_odd): Likewise.
(mips_expand_vec_unpack): Likewise.
(mips_expand_vi_broadcast): Likewise.
(mips_expand_vector_init): Likewise.
(mips_expand_vec_reduc): Likewise.
(mips_expand_msa_cmp): Likewise.
* config/mips/mips.md (casesi_internal_mips16_<mode>): Likewise.
* config/mn10300/mn10300.c (mn10300_print_operand): Likewise.
(cc_flags_for_mode): Likewise.
* config/msp430/msp430.c (msp430_print_operand): Likewise.
* config/nds32/nds32-md-auxiliary.c (nds32_mem_format): Likewise.
(nds32_output_casesi_pc_relative): Likewise.
* config/nds32/nds32.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/nvptx/nvptx.c (nvptx_ptx_type_from_mode): Likewise.
(nvptx_gen_unpack): Likewise.
(nvptx_gen_pack): Likewise.
(nvptx_gen_shuffle): Likewise.
(nvptx_gen_wcast): Likewise.
(nvptx_preferred_simd_mode): Likewise.
* config/pa/pa.c (pa_secondary_reload): Likewise.
* config/pa/predicates.md (base14_operand): Likewise.
* config/powerpcspe/powerpcspe-c.c
(altivec_resolve_overloaded_builtin): Likewise.
* config/powerpcspe/powerpcspe.c (rs6000_setup_reg_addr_masks):
Likewise.
(rs6000_preferred_simd_mode): Likewise.
(output_vec_const_move): Likewise.
(rs6000_expand_vector_extract): Likewise.
(rs6000_split_vec_extract_var): Likewise.
(reg_offset_addressing_ok_p): Likewise.
(rs6000_legitimate_offset_address_p): Likewise.
(rs6000_legitimize_address): Likewise.
(rs6000_emit_set_const): Likewise.
(rs6000_const_vec): Likewise.
(rs6000_emit_move): Likewise.
(spe_build_register_parallel): Likewise.
(rs6000_darwin64_record_arg_recurse): Likewise.
(swap_selector_for_mode): Likewise.
(spe_init_builtins): Likewise.
(paired_init_builtins): Likewise.
(altivec_init_builtins): Likewise.
(do_load_for_compare): Likewise.
(rs6000_generate_compare): Likewise.
(rs6000_expand_float128_convert): Likewise.
(emit_load_locked): Likewise.
(emit_store_conditional): Likewise.
(rs6000_output_function_epilogue): Likewise.
(rs6000_handle_altivec_attribute): Likewise.
(rs6000_function_value): Likewise.
(emit_fusion_gpr_load): Likewise.
(emit_fusion_p9_load): Likewise.
(emit_fusion_p9_store): Likewise.
* config/powerpcspe/predicates.md (easy_fp_constant): Likewise.
(fusion_gpr_mem_load): Likewise.
(fusion_addis_mem_combo_load): Likewise.
(fusion_addis_mem_combo_store): Likewise.
* config/rs6000/predicates.md (easy_fp_constant): Likewise.
(fusion_gpr_mem_load): Likewise.
(fusion_addis_mem_combo_load): Likewise.
(fusion_addis_mem_combo_store): Likewise.
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
Likewise.
* config/rs6000/rs6000-string.c (do_load_for_compare): Likewise.
* config/rs6000/rs6000.c (rs6000_setup_reg_addr_masks): Likewise.
(rs6000_preferred_simd_mode): Likewise.
(output_vec_const_move): Likewise.
(rs6000_expand_vector_extract): Likewise.
(rs6000_split_vec_extract_var): Likewise.
(reg_offset_addressing_ok_p): Likewise.
(rs6000_legitimate_offset_address_p): Likewise.
(rs6000_legitimize_address): Likewise.
(rs6000_emit_set_const): Likewise.
(rs6000_const_vec): Likewise.
(rs6000_emit_move): Likewise.
(rs6000_darwin64_record_arg_recurse): Likewise.
(swap_selector_for_mode): Likewise.
(paired_init_builtins): Likewise.
(altivec_init_builtins): Likewise.
(rs6000_expand_float128_convert): Likewise.
(emit_load_locked): Likewise.
(emit_store_conditional): Likewise.
(rs6000_output_function_epilogue): Likewise.
(rs6000_handle_altivec_attribute): Likewise.
(rs6000_function_value): Likewise.
(emit_fusion_gpr_load): Likewise.
(emit_fusion_p9_load): Likewise.
(emit_fusion_p9_store): Likewise.
* config/rx/rx.c (rx_gen_move_template): Likewise.
(flags_from_mode): Likewise.
* config/s390/predicates.md (s390_alc_comparison): Likewise.
(s390_slb_comparison): Likewise.
* config/s390/s390.c (s390_handle_vectorbool_attribute): Likewise.
(s390_vector_mode_supported_p): Likewise.
(s390_cc_modes_compatible): Likewise.
(s390_match_ccmode_set): Likewise.
(s390_canonicalize_comparison): Likewise.
(s390_emit_compare_and_swap): Likewise.
(s390_branch_condition_mask): Likewise.
(s390_rtx_costs): Likewise.
(s390_secondary_reload): Likewise.
(__SECONDARY_RELOAD_CASE): Likewise.
(s390_expand_cs): Likewise.
(s390_preferred_simd_mode): Likewise.
* config/s390/vx-builtins.md (vec_packsu_u<mode>): Likewise.
* config/sh/sh.c (sh_print_operand): Likewise.
(dump_table): Likewise.
(sh_secondary_reload): Likewise.
* config/sh/sh.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/sh/sh.md (casesi_worker_1): Likewise.
(casesi_worker_2): Likewise.
* config/sparc/predicates.md (icc_comparison_operator): Likewise.
(fcc_comparison_operator): Likewise.
* config/sparc/sparc.c (sparc_expand_move): Likewise.
(emit_soft_tfmode_cvt): Likewise.
(sparc_preferred_simd_mode): Likewise.
(output_cbranch): Likewise.
(sparc_print_operand): Likewise.
(sparc_expand_vec_perm_bmask): Likewise.
(vector_init_bshuffle): Likewise.
* config/spu/spu.c (spu_scalar_mode_supported_p): Likewise.
(spu_vector_mode_supported_p): Likewise.
(spu_expand_insv): Likewise.
(spu_emit_branch_or_set): Likewise.
(spu_handle_vector_attribute): Likewise.
(spu_builtin_splats): Likewise.
(spu_builtin_extract): Likewise.
(spu_builtin_promote): Likewise.
(spu_expand_sign_extend): Likewise.
* config/tilegx/tilegx.c (tilegx_scalar_mode_supported_p): Likewise.
(tilegx_simd_int): Likewise.
* config/tilepro/tilepro.c (tilepro_scalar_mode_supported_p): Likewise.
(tilepro_simd_int): Likewise.
* config/v850/v850.c (const_double_split): Likewise.
(v850_print_operand): Likewise.
(ep_memory_offset): Likewise.
* config/vax/vax.c (vax_rtx_costs): Likewise.
(vax_output_int_move): Likewise.
(vax_output_int_add): Likewise.
(vax_output_int_subtract): Likewise.
* config/visium/predicates.md (visium_branch_operator): Likewise.
* config/visium/visium.c (rtx_ok_for_offset_p): Likewise.
(visium_print_operand_address): Likewise.
* config/visium/visium.h (ASM_OUTPUT_ADDR_DIFF_ELT): Likewise.
* config/xtensa/xtensa.c (xtensa_mem_offset): Likewise.
(xtensa_expand_conditional_branch): Likewise.
(xtensa_copy_incoming_a7): Likewise.
(xtensa_output_literal): Likewise.
* dfp.c (decimal_real_maxval): Likewise.
* targhooks.c (default_libgcc_floating_mode_supported_p): Likewise.

gcc/c-family/
* c-cppbuiltin.c (mode_has_fma): Prefix mode names with E_ in
case statements.

gcc/objc/
* objc-encoding.c (encode_gnu_bitfield): Prefix mode names with E_ in
case statements.

libobjc/
* encoding.c (_darwin_rs6000_special_round_type_align): Prefix mode
names with E_ in case statements.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251453

[1/77] Add an E_ prefix to mode names

Later patches will add wrapper types for specific classes
of mode.  E.g. SImode will be a scalar_int_mode, SFmode will be a
scalar_float_mode, etc.  This patch prepares for that change by adding
an E_ prefix to the mode enum values.  It also adds #defines that map
the unprefixed names to the prefixed names; e.g:

  #define QImode E_QImode

Later patches will change this to use things like scalar_int_mode
where appropriate.

The patch continues to use enum values to initialise static data.
This isn't necessary for correctness, but it cuts down on the amount
of load-time initialisation and shouldn't have any downsides.

The patch also changes things like:

  cmp_mode == DImode ? DFmode : DImode

to:

  cmp_mode == DImode ? E_DFmode : E_DImode

This is because DImode and DFmode will eventually be different
classes, so the original ?: wouldn't be well-formed.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>
    Alan Hayward  <alan.hayward@arm.com>
    David Sherwood  <david.sherwood@arm.com>

gcc/
* genmodes.c (mode_size_inline): Add an E_ prefix to mode names.
(mode_nunits_inline): Likewise.
(mode_inner_inline): Likewise.
(mode_unit_size_inline): Likewise.
(mode_unit_precision_inline): Likewise.
(emit_insn_modes_h): Likewise.  Also emit a #define of the
unprefixed name.
(emit_mode_wider): Add an E_ prefix to mode names.
(emit_mode_complex): Likewise.
(emit_mode_inner): Likewise.
(emit_mode_adjustments): Likewise.
(emit_mode_int_n): Likewise.
* config/aarch64/aarch64-builtins.c (v8qi_UP, v4hi_UP, v4hf_UP)
(v2si_UP, v2sf_UP, v1df_UP, di_UP, df_UP, v16qi_UP, v8hi_UP, v8hf_UP)
(v4si_UP, v4sf_UP, v2di_UP, v2df_UP, ti_UP, oi_UP, ci_UP, xi_UP)
(si_UP, sf_UP, hi_UP, hf_UP, qi_UP): Likewise.
(CRC32_BUILTIN, ENTRY): Likewise.
* config/aarch64/aarch64.c (aarch64_push_regs): Likewise.
(aarch64_pop_regs): Likewise.
(aarch64_process_components): Likewise.
* config/alpha/alpha.c (alpha_emit_conditional_move): Likewise.
* config/arm/arm-builtins.c (v8qi_UP, v4hi_UP, v4hf_UP, v2si_UP)
(v2sf_UP, di_UP, v16qi_UP, v8hi_UP, v8hf_UP, v4si_UP, v4sf_UP)
(v2di_UP, ti_UP, ei_UP, oi_UP, hf_UP, si_UP, void_UP): Likewise.
* config/arm/arm.c (arm_init_libfuncs): Likewise.
* config/i386/i386-builtin-types.awk (ix86_builtin_type_vect_mode):
Likewise.
* config/i386/i386-builtin.def (pcmpestr): Likewise.
(pcmpistr): Likewise.
* config/microblaze/microblaze.c (double_memory_operand): Likewise.
* config/mmix/mmix.c (mmix_output_condition): Likewise.
* config/powerpcspe/powerpcspe.c (rs6000_init_hard_regno_mode_ok):
Likewise.
* config/rl78/rl78.c (mduc_regs): Likewise.
* config/rs6000/rs6000.c (rs6000_init_hard_regno_mode_ok): Likewise.
(htm_expand_builtin): Likewise.
* config/sh/sh.h (REGISTER_NATURAL_MODE): Likewise.
* config/sparc/sparc.c (emit_save_or_restore_regs): Likewise.
* config/xtensa/xtensa.c (print_operand): Likewise.
* expmed.h (NUM_MODE_PARTIAL_INT): Likewise.
(NUM_MODE_VECTOR_INT): Likewise.
* genoutput.c (null_operand): Likewise.
(output_operand_data): Likewise.
* genrecog.c (print_parameter_value): Likewise.
* lra.c (debug_operand_data): Likewise.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251452

Split out parts of scompare_loc_descriptor and emit_store_flag

This patch splits some cases out of scompare_loc_descriptor and
emit_store_flag, which helps with the upcoming machmode series.

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* dwarf2out.c (scompare_loc_descriptor_wide)
(scompare_loc_descriptor_narrow): New functions, split out from...
(scompare_loc_descriptor): ...here.
* expmed.c (emit_store_flag_int): New function, split out from...
(emit_store_flag): ...here.

From-SVN: r251451

dwarf2out.c (dwarf2out_finish): Remove setting AT_pubnames.

2017-08-30  Richard Biener  <rguenther@suse.de>

* dwarf2out.c (dwarf2out_finish): Remove setting AT_pubnames.
(dwarf2out_early_finish): Move setting of AT_pubnames from
early debug output to early finish.

From-SVN: r251450

msp430.h: Pass -mcode/data-region to the linker and -mdata-region to the assembler.

* gcc/config/msp430/msp430.h: Pass -mcode/data-region to the linker
and -mdata-region to the assembler.

From-SVN: r251449

dwarf2out.c (add_dwarf_attr): Check we don't add duplicate attributes.

2017-08-30  Richard Biener  <rguenther@suse.de>

* dwarf2out.c (add_dwarf_attr): Check we don't add duplicate
attributes.
(gen_subprogram_die): Add DW_AT_object_pointer only early.
(dwarf2out_early_global_decl): Only generate a DIE for the
abstract origin if it doesn't already exist or is a declaration DIE.
(resolve_addr): Do not add the linkage name twice when
generating a stub DIE for the DW_TAG_GNU_call_site target.

* g++.dg/pr78112-2.C: Do not expect duplicate DW_AT_object_pointer.

From-SVN: r251448

[rs6000] int->machine_mode in rs6000-c.c

2017-08-30  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
Use machine_mode rather than int for arg1_mode.

From-SVN: r251447

Daily bump.

From-SVN: r251444

net/internal/socktest: build sys_unix.go on AIX

    Reviewed-on: https://go-review.googlesource.com/59913

From-SVN: r251440

libgo: netinet/icmp6.h require netinet/in.h on AIX

    Reviewed-on: https://go-review.googlesource.com/59912

From-SVN: r251439

PR c++/81236 - ICE with template-id in generic lambda

* semantics.c (finish_id_expression): Remove special dependent case.
Avoid some later pieces when dependent.
(finish_qualified_id_expr): Do normal BASELINK handling in a
template.  Always build a SCOPE_REF for a destructor BIT_NOT_EXPR.
(parsing_default_capturing_generic_lambda_in_template): Remove.
* parser.c (cp_parser_postfix_dot_deref_expression): Always give an
error for types that will never be complete.
* mangle.c (write_expression): Add sanity check.
* tree.c (build_qualified_name): Add sanity check.
(cp_walk_subtrees): Walk into the class context of a BASELINK.
* lambda.c (add_capture): Improve diagnostic for generic lambda
capture failure.
* call.c (build_new_method_call_1): Print the right constructor
name.

From-SVN: r251438

libgo: fix Stat_t on AIX

    Reviewed-on: https://go-review.googlesource.com/59911

From-SVN: r251436

runtime: make go-nosys.c compile with !HAVE_SYSCALL

    Reviewed-on: https://go-review.googlesource.com/59910

From-SVN: r251435

tweak ChangeLog

From-SVN: r251434

Reimplement handling of lambdas in templates.

* cp-tree.h (LAMBDA_FUNCTION_P): Check DECL_DECLARES_FUNCTION_P.
* decl.c (start_preparsed_function): Call start_lambda_scope.
(finish_function): Call finish_lambda_scope.
* init.c (get_nsdmi): Call start/finish_lambda_scope.
* lambda.c (start_lambda_scope): Only ignore VAR_DECL in a function.
* parser.c (cp_parser_function_definition_after_declarator): Don't
call start/finish_lambda_scope.
* pt.c (retrieve_specialization): Ignore lambda functions in
templates.
(find_parameter_packs_r): Ignore capture proxies.  Look into
lambdas.
(check_for_bare_parameter_packs): Allow bare packs in lambdas.
(tsubst_default_argument): Call start/finish_lambda_scope.
(tsubst_function_decl): Handle lambda functions differently.
(tsubst_template_decl): Likewise.
(tsubst_expr) [DECL_EXPR]: Skip closure declarations and capture
proxies.
(tsubst_lambda_expr): Create a new closure rather than instantiate
the one from the template.
(tsubst_copy_and_build): Don't register a specialization of a pack.
(regenerate_decl_from_template): Call start/finish_lambda_scope.
(instantiate_decl): Remove special lambda function handling.
* semantics.c (process_outer_var_ref): Remove special generic lambda
handling.  Don't implicitly capture in a lambda in a template.  Look
for an existing proxy.
* class.c (current_nonlambda_class_type): Use decl_type_context.

From-SVN: r251433

re PR target/82015 (PowerPC should check if 2nd argument to __builtin_unpackv1ti and similar functions is 0 or 1)

[gcc]
2017-08-29  Michael Meissner  <meissner@linux.vnet.ibm.com>

PR target/82015
* config/rs6000/rs6000.c (rs6000_expand_binop_builtin): Insure
that the second argument of the built-in functions to unpack
128-bit scalar types to 64-bit values is 0 or 1.  Change to use a
switch statement instead a lot of if statements.
* config/rs6000/rs6000.md (unpack<mode>, FMOVE128_VSX iterator):
Allow 64-bit values to be in Altivec registers as well as
traditional floating point registers.
(pack<mode>, FMOVE128_VSX iterator): Likewise.

[gcc/testsuite]
2017-08-29  Michael Meissner  <meissner@linux.vnet.ibm.com>

PR target/82015
* gcc.target/powerpc/pr82015.c: New test.

From-SVN: r251432

PR c++/78840 - ICE with const and nested generic lambda

* g++.dg/cpp1y/lambda-generic-const5.C: New.

From-SVN: r251431

Remove unnecessary LAMBDA_EXPR fields.

* cp-tree.h (LAMBDA_EXPR_CLOSURE): Use TREE_TYPE.
(LAMBDA_EXPR_RETURN_TYPE): Remove.
(struct tree_lambda_expr): Remove closure and return_type fields.
* lambda.c (build_lambda_expr): Don't set LAMBDA_EXPR_RETURN_TYPE.
* pt.c (tsubst_copy_and_build): Likewise.
* parser.c (cp_parser_lambda_declarator_opt): Track return type.
(cp_parser_lambda_body): Adjust unspecified return type check.
* ptree.c (cxx_print_lambda_node): Don't print closure or
return type.

From-SVN: r251430

PR c++/80935 - wrong C++17 error with lambda

* decl.c (check_for_uninitialized_const_var): Check
is_instantiation_of_constexpr.
* constexpr.c (ensure_literal_type_for_constexpr_object): Check
is_instantiation_of_constexpr.
(potential_constant_expression_1): Check var_in_maybe_constexpr_fn.

From-SVN: r251429

Various small fixes.

* lambda.c (build_lambda_object): Check for error_mark_node.
* pt.c (make_pack_expansion): Set PACK_EXPANSION_LOCAL_P on the type
pack as well.
(tsubst_decl) [FUNCTION_DECL]: Set DECL_CONTEXT on the parameters.
(tsubst) [TEMPLATE_PARM_INDEX]: Check for error_mark_node.

From-SVN: r251428

PR c++/80767 - unnecessary instantiation of generic lambda

* call.c (convert_like_real): Call build_user_type_conversion_1 if
cand is null.
(add_conv_candidate): Build a ck_user conversion with no candidate.

From-SVN: r251427

Fix lambdas in template default argument of inherited ctor.

* method.c (synthesized_method_base_walk): Replace an inherited
template with its specialization.
(synthesized_method_walk): Make inheriting_ctor a pointer.
(maybe_explain_implicit_delete, explain_implicit_non_constexpr)
(deduce_inheriting_ctor, implicitly_declare_fn): Adjust.

From-SVN: r251426

Adjust C++17 class deduction use of DECL_ABSTRACT_ORIGIN.

* pt.c (build_deduction_guide): Set DECL_ABSTRACT_ORIGIN on the
template, not the function.
(template_guide_p): Adjust.

From-SVN: r251425

Support copying local_specializations.

* cp-tree.h (enum lss_policy): New.
(local_specialization_stack): Add policy parameter to default ctor.
* pt.c (local_specialization_stack): Copy local_specializations if
lss_copy.

From-SVN: r251424

Add immediate potential_constant_expression variants.

* constexpr.c (potential_constant_expression_1): Add "now" parm.
(is_constant_expression, require_constant_expression): New.
(is_static_init_expression, is_nondependent_constant_expression)
(is_nondependent_static_init_expression): Drop "potential".
* except.c (build_must_not_throw_expr): Do type conversion on
value-dependent argument.
* pt.c, semantics.c, typeck2.c: Use variants without "potential".

From-SVN: r251423

Instantiate default arguments/member initializers once.

* init.c (get_nsdmi): Remember NSDMI instantiations.
* parser.c (inject_this_parameter): Be more picky about
current_class_ptr.
* pt.c (tsubst_copy): Simplify 'this' handling.
(tsubst_default_argument): Remember default argument
instantiations.  Take parameter number.
(tsubst_default_arguments): Pass it.
* call.c (convert_default_arg): Likewise.

From-SVN: r251422

Fix default argument conversion failure and SFINAE.

* call.c (build_over_call): Check convert_default_arg result for
error_mark_node.
* parser.c (cp_parser_late_parsing_default_args): Remember
error_mark_node.

From-SVN: r251421

runtime: fix lfstack for 64-bit AIX

    Reviewed-on: https://go-review.googlesource.com/57550

From-SVN: r251420

*.c: Remove excess braces from target selectors.

* gcc.target/i386/*.c: Remove excess braces from target selectors.

From-SVN: r251419

ira-costs: avoid missing base registers in record_address_regs

* ira-costs.c (record_address_regs): Handle both operands of PLUS for
MAX_REGS_PER_ADDRESS == 1.

From-SVN: r251418

20030926-1.c: Add dg-additional-options.

* gcc.target/i386/20030926-1.c: Add dg-additional-options.
* gcc.target/i386/abi-2.c: Ditto.
* gcc.target/i386/interrupt-sibcall-2.c: Ditto.
* gcc.target/i386/pr22076.c: Ditto.
* gcc.target/i386/pr37216.c: Ditto.
* gcc.target/i386/pr39431.c: Ditto.
* gcc.target/i386/pr40906-1.c: Ditto.
* gcc.target/i386/pr40906-2.c: Ditto.
* gcc.target/i386/pr43766.c: Ditto.
* gcc.target/i386/pr46226.c: Ditto.
* gcc.target/i386/pr46470.c: Ditto.
* gcc.target/i386/pr59929.c: Ditto.
* gcc.target/i386/sse-10.c: Ditto.
* gcc.target/i386/vararg-1.c: Ditto.
* gcc.target/i386/vararg-1.c: Ditto.
* gcc.target/i386/asm-6.c: Compile for fpic target only.
* gcc.target/i386/pr44223.c: Ditto.
* gcc.target/i386/bitfield1.c (dg-options): Remove target selector.
* gcc.target/i386/bitfield2.c (dg-options): Ditto.
* gcc.target/i386/pr67480.c (dg-options): Ditto.
* gcc.target/i386/vect-cond-1.c (dg-options): Ditto.
* gcc.target/i386/bittest.c (scan-assembler-times): Ditto.
* gcc.target/i386/darwin-fpmath.c (dg-do): Simplify target selector.
* gcc.target/i386/mvc9.c: Compile for lto target only.
* gcc.target/i386/pr45234.c: Compile for ia32 target only.
* gcc.target/i386/pr49866.c: Compile for lp64 target only.
* gcc.target/i386/pr57091.c: Ditto.
* gcc.target/i386/pr61599-2.c: Ditto.

From-SVN: r251417

i386.opt (flag_fentry): Do not init to -1.

* config/i386/i386.opt (flag_fentry): Do not init to -1.
* config/i386/i386.c (ix86_option_override_internal): Simplify
setting of opts->x_flag_entry.

From-SVN: r251416

re PR tree-optimization/81503 (Wrong code at -O2)

[gcc]

2017-08-29  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
    Jakub Jelinek  <jakub@redhat.com>
    Richard Biener  <rguenther@suse.de>

PR tree-optimization/81503
* gimple-ssa-strength-reduction.c (replace_mult_candidate): Ensure
folded constant fits in the target type; reorder tests for clarity.

[gcc/testsuite]

2017-08-29  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

PR tree-optimization/81503
* gcc.c-torture/execute/pr81503.c: New file.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
Co-Authored-By: Richard Biener <rguenther@suse.de>
From-SVN: r251414

Make expansion of balanced binary trees of switches on tree level.

2017-08-29  Martin Liska  <mliska@suse.cz>

* passes.def: Include pass_lower_switch.
* stmt.c (dump_case_nodes): Remove and move to
tree-switch-conversion.
(case_values_threshold): Likewise.
(expand_switch_as_decision_tree_p): Likewise.
(emit_case_decision_tree): Likewise.
(expand_case): Likewise.
(balance_case_nodes): Likewise.
(node_has_low_bound): Likewise.
(node_has_high_bound): Likewise.
(node_is_bounded): Likewise.
(emit_case_nodes): Likewise.
(struct simple_case_node): New struct.
(add_case_node): Remove.
(emit_case_dispatch_table): Use vector instead of case_list.
(reset_out_edges_aux): Remove.
(compute_cases_per_edge): Likewise.
(expand_case): Build list of simple_case_node.
(expand_sjlj_dispatch_table): Use it.
* tree-switch-conversion.c (struct case_node): Moved from
stmt.c and adjusted.
(emit_case_nodes): Likewise.
(node_has_low_bound): Likewise.
(node_has_high_bound): Likewise.
(node_is_bounded): Likewise.
(case_values_threshold): Likewise.
(reset_out_edges_aux): Likewise.
(compute_cases_per_edge): Likewise.
(add_case_node): Likewise.
(dump_case_nodes): Likewise.
(balance_case_nodes): Likewise.
(expand_switch_as_decision_tree_p): Likewise.
(emit_jump): Likewise.
(emit_case_decision_tree): Likewise.
(try_switch_expansion): Likewise.
(do_jump_if_equal): Likewise.
(emit_cmp_and_jump_insns): Likewise.
(fix_phi_operands_for_edge): New function.
(record_phi_operand_mapping): Likewise.
(class pass_lower_switch): New pass.
(pass_lower_switch::execute): New function.
(make_pass_lower_switch): Likewise.
(conditional_probability):
* timevar.def: Add TV_TREE_SWITCH_LOWERING.
* tree-pass.h: Add make_pass_lower_switch.
2017-08-29  Martin Liska  <mliska@suse.cz>

* gcc.dg/tree-prof/update-loopch.c: Scan patterns in
switchlower.
* gcc.dg/tree-ssa/vrp104.c: Likewise.

From-SVN: r251412

re PR target/80993 ([msp430] __attribute__((interrupt)) should imply __attribute__((used)))

PR target/80993
* gcc/config/msp430/msp430.c (msp430_attr): Mark interrupt
handlers as used.

From-SVN: r251410

dwarf2out.c (add_dwarf_attr): When checking is enabled verify we do not add a DW_AT_inline attribute twice.

2017-08-29  Richard Biener  <rguenther@suse.de>

* dwarf2out.c (add_dwarf_attr): When checking is enabled verify
we do not add a DW_AT_inline attribute twice.
(gen_subprogram_die): Remove code setting DW_AT_inline on
DECL_ABSTRACT_P nodes.

From-SVN: r251409

Fix --help=target (Ada) (PR other/39851)

2017-08-29  Martin Liska  <mliska@suse.cz>

PR other/39851
* gcc-interface/trans.c (Pragma_to_gnu): Set argument to NULL.

From-SVN: r251406

Set the call nothrow flag more often

This patch sets the nothrow flag for various calls to internal functions
that are not inherently NOTHROW (and so can't be declared that way in
internal-fn.def) but that are used in contexts that can guarantee
NOTHROWness.

2017-08-29  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
* gimplify.c (gimplify_call_expr): Copy the nothrow flag to
calls to internal functions.
(gimplify_modify_expr): Likewise.
* tree-call-cdce.c (use_internal_fn): Likewise.
* tree-ssa-math-opts.c (pass_cse_reciprocals::execute): Likewise.
(convert_to_divmod): Set the nothrow flag.
* tree-if-conv.c (predicate_mem_writes):  Likewise.
* tree-vect-stmts.c (vectorizable_mask_load_store): Likewise.
(vectorizable_call): Likewise.
(vectorizable_store): Likewise.
(vectorizable_load): Likewise.
* tree-vect-patterns.c (vect_recog_pow_pattern): Likewise.
(vect_recog_mask_conversion_pattern): Likewise.

From-SVN: r251401

Fix --help=target (PR other/39851).

2017-08-29  Martin Liska  <mliska@suse.cz>

PR other/39851
* gcc.c (driver_handle_option): Add new argument.
* opts-common.c (handle_option): Pass
target_option_override_hook.
* opts-global.c (lang_handle_option): Add new option.
(set_default_handlers):  Add new argument.
(decode_options): Likewise.
* opts.c (target_handle_option): Likewise.
(common_handle_option): Call target_option_override_hook.
* opts.h (struct cl_option_handler_func): Add hook for
target option override.
(struct cl_option_handlers): Likewise.
(set_default_handlers): Add new argument.
(decode_options): Likewise.
(common_handle_option): Likewise.
(target_handle_option): Likewise.
* toplev.c (toplev::main): Pass targetm.target_option.override
hook.
2017-08-29  Martin Liska  <mliska@suse.cz>

PR other/39851
* c-common.c (parse_optimize_options): Add argument to function
call.
* c-pragma.c (handle_pragma_diagnostic): Likewise.

From-SVN: r251400

tree-vect-slp.c (vect_bb_slp_scalar_cost): Properly confine life to the active subtree.

2017-08-29  Richard Biener  <rguenther@suse.de>
Dominik Infuehr <dominik.infuehr@theobroma-systems.com>

* tree-vect-slp.c (vect_bb_slp_scalar_cost): Properly confine
life to the active subtree.

* gcc.dg/vect/costmodel/x86_64/costmodel-vect-slp.c: New testcase.

Co-Authored-By: Dominik Infuehr <dominik.infuehr@theobroma-systems.com>
From-SVN: r251398

tree-ssa-dom.c (edge_info::record_simple_equiv): Call derive_equivalences.

* tree-ssa-dom.c (edge_info::record_simple_equiv): Call
derive_equivalences.
(derive_equivalences_from_bit_ior, record_temporary_equivalences):
Code moved into....
(edge_info::derive_equivalences): New private member function

* gcc.dg/torture/pr57214.c: Fix type of loop counter.
* gcc.dg/tree-ssa/ssa-sink-16.c: Disable DOM.
* gcc.dg/tree-ssa/ssa-dom-thread-11.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-12.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-13.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-14.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-15.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-16.c: New test.
* gcc.dg/tree-ssa/ssa-dom-thread-17.c: New test.

From-SVN: r251397

tree-ssa-dom.c (class edge_info): Changed from a struct to a class.

* tree-ssa-dom.c (class edge_info): Changed from a struct
to a class.  Add ctor/dtor, methods and data members.
(edge_info::edge_info): Renamed from allocate_edge_info.
Initialize additional members.
(edge_info::~edge_info): New.
(free_dom_edge_info): Delete the edge info.
(record_edge_info): Use new class & associated member functions.
Tighten forms for testing for edge equivalences.
(record_temporary_equivalences): Iterate over the simple
equivalences rather than assuming there's only one per edge.
(cprop_into_successor_phis): Iterate over the simple
equivalences rather than assuming there's only one per edge.
(optimize_stmt): Use operand_equal_p rather than pointer
equality for mini-DSE code.

From-SVN: r251396

Daily bump.

From-SVN: r251395

re PR fortran/81770 (Bogus warning: Pointer in pointer assignment might outlive the pointer target)

2017-08-28  Janus Weil  <janus@gcc.gnu.org>

PR fortran/81770
* expr.c (gfc_check_pointer_assign): Improve the check whether pointer
may outlive pointer target.

2017-08-28  Janus Weil  <janus@gcc.gnu.org>

PR fortran/81770
* gfortran.dg/warn_target_lifetime_3.f90: Fix a typo.
* gfortran.dg/warn_target_lifetime_4.f90: New testcase.

From-SVN: r251390

dec_init_1.f90 (dummy): Use ichar in print statement.

2017-08-25  Steve Ellcey  <sellcey@cavium.com>

* gfortran.dg/dec_init_1.f90 (dummy): Use ichar in print statement.
* gfortran.dg/dec_init_2.f90 (dummy): Ditto.
* gfortran.dg/dec_init_3.f90 (dummy): Ditto.

From-SVN: r251389

cp-tree.h (lang_type): Replace sorted_fields vector with bindings map.

* cp-tree.h (lang_type): Replace sorted_fields vector with
bindings map.
(CLASSTYPE_SORTED_FIELDS): Delete.
(CLASSTYPE_BINDINGS): New.
* decl.c (finish_enum_value_list): Swap args of
insert_late_enum_def_bindings.
* name-lookup.c (lookup_field_1): Replace binary search of sorted
fields with map->get.
(sorted_fields_type_new, count_fields,
add_fields_to_record_type, add_enum_fields_to_record_type): Delete.
(add_class_member, add_class_members): New.
(set_class_bindings): Create map and insert.
(insert_late_enum_def_binding): Swap parms.  Use add_clasS_member.
* ptree.c (cxx_print_type): Delete sorted fields printing.

From-SVN: r251388

cp-tree.h (insert_late_enum_def_into_classtype_sorted_fields): Delete.

* cp-tree.h (insert_late_enum_def_into_classtype_sorted_fields):
Delete.
* name-lookup.h (set_class_bindings,
insert_late_enum_def_bindings): Declare.
* decl.c (finish_enum_value_list): Adjust for
insert_late_enum_def_bindings name change.
* class.c (finish_struct_1): Call set_class_bindings.
(count_fields, add_fields_to_record_type,
add_enum_fields_to_record_type, sorted_fields_type_new,
insert_into_classtype_sorted_fields,
insert_late_enum_def_into_classtype_sorted_fields): Move to ...
* name-lookup.h (count_fields, add_fields_to_record_type,
add_enum_fields_to_record_type, sorted_fields_type_new,
set_class_bindings, insert_late_enum_def_bindings): ... here.

From-SVN: r251387

gcc.c (execute): Fold SIGPIPE handling into switch statement.

* gcc.c (execute): Fold SIGPIPE handling into switch
statement.  Adjust internal error message.

From-SVN: r251385

re PR lto/81968 (early lto debug objects make Solaris ld SEGV)

2017-08-28  Richard Biener  <rguenther@suse.de>

PR lto/81968
* simple-object-elf.c (simple_object_elf_copy_lto_debug_section):
Adjust field with for sh_type write, set SHF_EXCLUDE only for
removed sections.

From-SVN: r251384

re PR debug/81993 (-gsplit-dwarf removes some symbols, causing some undefined references)

2017-08-28  Richard Biener  <rguenther@suse.de>

PR debug/81993
* dwarf2out.c (gen_remaining_tmpl_value_param_die_attributes):
Do nothing for removed DIEs.

From-SVN: r251382