Avoid warnings in <charconv>

* include/bits/charconv.h (__to_chars_len): Avoid -Wsign-compare
warnings.

From-SVN: r276889

Relax store_bit_field call in store_expr

store_bit_field already takes a poly_uint64 size, so we can relax the
INTVAL to rtx_to_poly_int64.  This is tested by the SVE ACLE patches.

2019-10-11  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* expr.c (store_expr): Use rtx_to_poly_int64 rather than
INTVAL when calling store_bit_field.

From-SVN: r276888

[ARM] Tweak HONOR_REG_ALLOC_ORDER

Setting HONOR_REG_ALLOC_ORDER improves codesize with -Os, however it generates
slower and larger code with -O2 and higher.  So only set it when optimizing for
size.  On Cortex-A57 this improves SPECINT2006 by 0.15% and SPECFP2006 by 0.25%
while reducing codesize.

    gcc/
* config/arm/arm.h (HONOR_REG_ALLOC_ORDER): Set when optimizing for
size.

From-SVN: r276887

tree-vect-loop.c (vect_analyze_loop_operations): Adjust call to vectorizable_live_operation.

2019-10-11  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * tree-vect-loop.c (vect_analyze_loop_operations): Adjust call to
        vectorizable_live_operation.
        (vectorizable_live_operation): Adjust parameters.
        * tree-vect-stmts.c (vect_init_vector,
        vect_gen_widened_results_half): Fix typo in function comment.
        (can_vectorize_live_stmts): Adjust function comment.
        Adjust parameters.  Adjust call to vectorizable_live_operation.
        (vect_analyze_stmt): Adjust call to can_vectorize_live_stmts.
        (vect_transform_stmt): Adjust function comment.  Adjust call to
        can_vectorize_live_stmts.
        * tree-vectorizer.h (vectorizable_live_operation): Adjust parameters.

From-SVN: r276886

Fortran] PR 92050 - fix ICE with -fcheck=all

        gcc/fortran/
        PR fortran/92050
        * trans-expr.c (gfc_conv_procedure_call): Handle code generated
        by -fcheck=all.

        gcc/testsuite/
        PR fortran/92050
        * gfortran.dg/pr92050.f90: New.

From-SVN: r276885

re PR tree-optimization/90883 (Generated code is worse if returned struct is unnamed)

2019-10-11  Richard Biener  <rguenther@suse.de>

PR tree-optimization/90883
PR tree-optimization/91091
* tree-ssa-sccvn.c (vn_reference_lookup_3): Use correct
alias-sets both for recording VN table entries and continuing
walking after translating through copies.  Handle same-sized
reads from SSA names by returning the plain SSA name.
(eliminate_dom_walker::eliminate_stmt): Properly handle
non-size precision stores in redundant store elimination.

* gcc.dg/torture/20191011-1.c: New testcase.
* gcc.dg/tree-ssa/ssa-fre-82.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-83.c: Likewise.
* gcc.dg/tree-ssa/redundant-assign-zero-1.c: Disable FRE.
* gcc.dg/tree-ssa/redundant-assign-zero-2.c: Likewise.

From-SVN: r276882

ggc-page.c (release_pages): Output statistics when !quiet_flag.

* ggc-page.c (release_pages): Output statistics when !quiet_flag.
(ggc_collect): Dump later to not interfere with release_page dump.
(ggc_trim): New function.
* ggc-none.c (ggc_trim): New.
* ggc.h (ggc_trim): Declare.

* lto.c (lto_wpa_write_files): Call ggc_trim.

From-SVN: r276878

re PR tree-optimization/92066 (Many vectorization tests FAIL)

2019-10-11  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92066
PR tree-optimization/92046
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
Fix bogus cost model check.

From-SVN: r276876

[OpenMP,Fortran] Fix several OpenMP use_device_addr/map/update errors

gcc/fortran/
* f95-lang.c (LANG_HOOKS_OMP_IS_ALLOCATABLE_OR_PTR): Re-define to
gfc_omp_is_allocatable_or_ptr.
* trans-decl.c (create_function_arglist): Set GFC_DECL_OPTIONAL_ARGUMENT
only if not passed by value.
* trans-openmp.c (gfc_omp_is_allocatable_or_ptr): New.
(gfc_trans_omp_clauses): For MAP, handle (present) optional arguments;
for target update, handle allocatable/pointer scalars.
* trans.h (gfc_omp_is_allocatable_or_ptr): Declare.

gcc/
* langhooks-def.h (LANG_HOOKS_OMP_IS_ALLOCATABLE_OR_PTR): Define.
(LANG_HOOKS_DECLS): Add it.
* langhooks.h (lang_hooks_for_decls): Add omp_is_allocatable_or_ptr;
update comment for omp_is_optional_argument.
* omp-general.c (omp_is_allocatable_or_ptr): New.
* omp-general.h (omp_is_allocatable_or_ptr): Declare.
* omp-low.c (scan_sharing_clauses, lower_omp_target): Handle
Fortran's optional arguments and allocatable/pointer scalars
with use_device_addr.

libgomp/
* testsuite/libgomp.fortran/use_device_addr-1.f90: New.
* testsuite/libgomp.fortran/use_device_addr-2.f90: New.

From-SVN: r276875

decl.c (elaborate_reference_1): Specifically deal with pointer displacement.

* gcc-interface/decl.c (elaborate_reference_1): Specifically deal with
pointer displacement.

* gcc-interface/decl.c (components_to_record): Use proper name.

* gcc-interface/trans.c (Sloc_to_locus): Use standard types.

From-SVN: r276874

decl.c (gnat_to_gnu_field): Adjust again the packing for a field without strict alignment and with an...

* gcc-interface/decl.c (gnat_to_gnu_field): Adjust again the packing
for a field without strict alignment and with an oversized clause.

From-SVN: r276873

S/390: Test signaling FP comparison instructions

gcc/testsuite/ChangeLog:

2019-10-11  Ilya Leoshkevich  <iii@linux.ibm.com>

PR target/77918
* gcc.target/s390/s390.exp: Enable Fortran tests.
* gcc.target/s390/zvector/autovec-double-quiet-eq.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-ge.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-gt.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-le.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-lt.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-ordered.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-uneq.c: New test.
* gcc.target/s390/zvector/autovec-double-quiet-unordered.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-eq-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-eq-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-eq.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ge-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ge-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ge.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-gt-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-gt-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-gt.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-le-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-le-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-le.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-lt-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-lt-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-lt.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ltgt-z13-finite.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ltgt-z13.c: New test.
* gcc.target/s390/zvector/autovec-double-signaling-ltgt.c: New test.
* gcc.target/s390/zvector/autovec-double-smax-z13.F90: New test.
* gcc.target/s390/zvector/autovec-double-smax.F90: New test.
* gcc.target/s390/zvector/autovec-double-smin-z13.F90: New test.
* gcc.target/s390/zvector/autovec-double-smin.F90: New test.
* gcc.target/s390/zvector/autovec-float-quiet-eq.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-ge.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-gt.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-le.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-lt.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-ordered.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-uneq.c: New test.
* gcc.target/s390/zvector/autovec-float-quiet-unordered.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-eq.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-ge.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-gt.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-le.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-lt.c: New test.
* gcc.target/s390/zvector/autovec-float-signaling-ltgt.c: New test.
* gcc.target/s390/zvector/autovec-fortran.h: New test.
* gcc.target/s390/zvector/autovec-long-double-signaling-ge.c: New test.
* gcc.target/s390/zvector/autovec-long-double-signaling-gt.c: New test.
* gcc.target/s390/zvector/autovec-long-double-signaling-le.c: New test.
* gcc.target/s390/zvector/autovec-long-double-signaling-lt.c: New test.
* gcc.target/s390/zvector/autovec.h: New test.

From-SVN: r276872

S/390: Use signaling FP comparison instructions

dg-torture.exp=inf-compare-1.c is failing, because (qNaN > +Inf)
comparison is compiled to CDB instruction, which does not signal an
invalid operation exception. KDB should have been used instead.

This patch introduces a new CCmode and a new pattern in order to
generate signaling instructions in this and similar cases.

gcc/ChangeLog:

2019-10-11  Ilya Leoshkevich  <iii@linux.ibm.com>

PR target/77918
* config/s390/2827.md: Add new opcodes.
* config/s390/2964.md: Likewise.
* config/s390/3906.md: Likewise.
* config/s390/8561.md: Likewise.
* config/s390/s390-builtins.def (s390_vfchesb): Use
the new vec_cmpgev4sf_quiet_nocc.
(s390_vfchedb): Use the new vec_cmpgev2df_quiet_nocc.
(s390_vfchsb): Use the new vec_cmpgtv4sf_quiet_nocc.
(s390_vfchdb): Use the new vec_cmpgtv2df_quiet_nocc.
(vec_cmplev4sf): Use the new vec_cmplev4sf_quiet_nocc.
(vec_cmplev2df): Use the new vec_cmplev2df_quiet_nocc.
(vec_cmpltv4sf): Use the new vec_cmpltv4sf_quiet_nocc.
(vec_cmpltv2df): Use the new vec_cmpltv2df_quiet_nocc.
* config/s390/s390-modes.def (CCSFPS): New mode.
* config/s390/s390.c (s390_match_ccmode_set): Support CCSFPS.
(s390_select_ccmode): Return CCSFPS for LT, LE, GT, GE and LTGT.
(s390_branch_condition_mask): Reuse CCS for CCSFPS.
(s390_expand_vec_compare): Use non-signaling patterns where
necessary.
(s390_reverse_condition): Support CCSFPS.
* config/s390/s390.md (*cmp<mode>_ccsfps): New pattern.
* config/s390/vector.md: (VFCMP_HW_OP): Remove.
(asm_fcmp_op): Likewise.
(*smaxv2df3_vx): Use pattern for quiet comparison.
(*sminv2df3_vx): Likewise.
(*vec_cmp<VFCMP_HW_OP:code><mode>_nocc): Remove.
(*vec_cmpeq<mode>_quiet_nocc): New pattern.
(vec_cmpgt<mode>_quiet_nocc): Likewise.
(vec_cmplt<mode>_quiet_nocc): New expander.
(vec_cmpge<mode>_quiet_nocc): New pattern.
(vec_cmple<mode>_quiet_nocc): New expander.
(*vec_cmpeq<mode>_signaling_nocc): New pattern.
(*vec_cmpgt<mode>_signaling_nocc): Likewise.
(*vec_cmpgt<mode>_signaling_finite_nocc): Likewise.
(*vec_cmpge<mode>_signaling_nocc): Likewise.
(*vec_cmpge<mode>_signaling_finite_nocc): Likewise.
(vec_cmpungt<mode>): New expander.
(vec_cmpunge<mode>): Likewise.
(vec_cmpuneq<mode>): Use quiet patterns.
(vec_cmpltgt<mode>): Allow only on z14+.
(vec_cmpordered<mode>): Use quiet patterns.
(vec_cmpunordered<mode>): Likewise.
(VEC_CMP_EXPAND): Add ungt and unge.

gcc/testsuite/ChangeLog:

2019-10-11  Ilya Leoshkevich  <iii@linux.ibm.com>

* gcc.target/s390/vector/vec-scalar-cmp-1.c: Adjust
expectations.

From-SVN: r276871

Do not allocate ggc during streaming.

* gimple-streamer-out.c (output_gimple_stmt): Add explicit function
parameter.
* lto-streamer-out.c: Include tree-dfa.h.
(output_cfg): Do not use cfun.
(lto_prepare_function_for_streaming): New.
(output_function): Do not push cfun; do not initialize loop optimizer.
* lto-streamer.h (lto_prepare_function_for_streaming): Declare.
* passes.c (ipa_write_summaries): Use it.
(ipa_write_optimization_summaries): Do not modify bodies.
* tree-dfa.c (renumber_gimple_stmt_uids): Add function parameter.
* tree.dfa.h (renumber_gimple_stmt_uids): Update prototype.
* tree-ssa-dse.c (pass_dse::execute): Update use of
renumber_gimple_stmt_uids.
* tree-ssa-math-opts.c (pass_optimize_widening_mul::execute): Likewise.

* lto.c (lto_wpa_write_files): Prepare all bodies for streaming.

From-SVN: r276870

decl.c (annotate_value): Really test the sign of the value when deciding to build a NEGATE_EXPR.

* gcc-interface/decl.c (annotate_value) <INTEGER_CST>: Really test the
sign of the value when deciding to build a NEGATE_EXPR.
<PLUS_EXPR>: Remove redundant line.
<BIT_AND_EXPR>: Do the negation here.

From-SVN: r276866

decl.c (Gigi_Equivalent_Type): New case.

* gcc-interface/decl.c (Gigi_Equivalent_Type) <E_Array_Subtype>: New
case.  Return the base type if the subtype is not constrained.

From-SVN: r276865

decl.c (gnat_to_gnu_entity): New case to deal with the definition of named numbers.

* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Named_{Integer|Real}>:
New case to deal with the definition of named numbers.
<E_Variable>: Minor tweaks.  Set DECL_IGNORED_P on the CONST_DECL
if a corresponding variable is built.
* gcc-interface/trans.c (gnat_to_gnu) <N_Integer_Literal>: Return
error_mark_node instead of aborting on overflow for named numbers.
<N_Number_Declaration>: Reuse the <N_Object_Declaration> case and
deal with error_mark_node specifically.
* gcc-interface/utils.c (create_var_decl): Do not set DECL_IGNORED_P
on CONST_DECLs.
(gnat_write_global_declarations): Output global constants.

From-SVN: r276864

[Ada] Repair ChangeLog entries

My scripts and I unexpectedly erased gcc/ada/ChangeLog yesterday. This
commit restores the ChangeLog file to its previous state and adds the
entries for my commits yesterday.

From-SVN: r276861

re PR c++/91987 (-fstrict-eval-order issues)

PR c++/91987
cp/
* decl2.c (grok_array_decl): For -fstrong-eval-order, when array ref
operands have been swapped and at least one operand has side-effects,
revert the swapping before calling build_array_ref.
* typeck.c (cp_build_array_ref): For non-ARRAY_TYPE array ref with
side-effects on the index operand, if -fstrong-eval-order use
save_expr around the array operand.
(cp_build_binary_op): For shifts with side-effects in the second
operand, wrap first operand into SAVE_EXPR and evaluate it before
the shift.
* semantics.c (handle_omp_array_sections_1): Temporarily disable
flag_strong_eval_order during OMP_CLAUSE_REDUCTION array section
processing.
* cp-gimplify.c (gimplify_to_rvalue): New function.
(cp_gimplify_expr): Use it.
testsuite/
* g++.dg/cpp1z/eval-order6.C: New test.
* g++.dg/cpp1z/eval-order7.C: New test.
* g++.dg/cpp1z/eval-order8.C: New test.
* c-c++-common/gomp/pr91987.c: New test.

From-SVN: r276860

vec_promote_demote cost to 1 for non-Power7 VSX architectures

2019-10-11  Kewen Lin  <linkw@gcc.gnu.org>

    * config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Lower
    vec_promote_demote cost to 1 for non-Power7 VSX architectures.

From-SVN: r276859

Daily bump.

From-SVN: r276858

Update DFP macros in float.h for C2x and TS 18661-2.

GCC's <float.h> includes various macros for decimal floating-point
types, defined if __STDC_WANT_DEC_FP__, as defined in TS 24732.

TS 18661-2 and C2X make some changes to those macros.  In TS 18661-2,
they are to be defined if __STDC_WANT_IEC_60559_DFP_EXT__, and the
*_SUBNORMAL_MIN macros are renamed to *_TRUE_MIN.  In C2X, the macros
are to be defined whenever DFP is supported, without needing any
feature test macro to be defined.

This patch updates the header accordingly.  There is no existing
predefined macro for whether the target supports DFP; rather than
adding a new macro for that purpose, this patch changes the predefined
macros used in <float.h> so that they are only defined when DFP is
supported and thus can be used as conditionals; this is the same way
predefined macros for _FloatN and _FloatNx types work.  Although
formally TR 24732 and TS 18661-2 say nothing about implementations
lacking DFP support, it seems appropriate to avoid defining the macros
in <float.h>, in the absence of DFP support, even if the respective
feature test macros are defined.

Bootstrapped with no regressions on x86_64-pc-linux-gnu.  Also tested
the c2x-float-no-dfp-* tests for aarch64-linux-gnu to make sure they
do pass in a no-DFP configuration.

gcc:
* ginclude/float.h [!__DEC32_MANT_DIG__]: Do not define DFP
macros.
[__STDC_WANT_IEC_60559_DFP_EXT__ || __STDC_VERSION__ > 201710L]:
Also define DFP macros for these conditions.
[!__STDC_WANT_DEC_FP__] (DEC32_SUBNORMAL_MIN, DEC64_SUBNORMAL_MIN,
DEC128_SUBNORMAL_MIN): Do not define.
[__STDC_WANT_IEC_60559_DFP_EXT__ || __STDC_VERSION__ > 201710L]
(DEC32_TRUE_MIN, DEC64_TRUE_MIN, DEC128_TRUE_MIN): New macros.

gcc/c-family:
* c-cppbuiltin.c (c_cpp_builtins): Do not define macros for DFP
types if DFP not supported.

gcc/testsuite:
* gcc.dg/c11-float-dfp-1.c, gcc.dg/c2x-float-no-dfp-1.c,
gcc.dg/c2x-float-no-dfp-2.c, gcc.dg/dfp/c2x-float-dfp-1.c,
gcc.dg/dfp/c2x-float-dfp-2.c, gcc.dg/dfp/c2x-float-dfp-3.c,
gcc.dg/dfp/tr24732-float-dfp-1.c,
gcc.dg/dfp/ts18661-2-float-dfp-1.c: New tests.

From-SVN: r276854

re PR middle-end/26241 (None of the IPA passes are documented in passes.texi)

2019-10-10  Xiong Hu Luo  <luoxhu@linux.ibm.com>
    Sandra Loosemore  <sandra@codesourcery.com>

gcc/

PR middle-end/26241
* doc/lto.texi (IPA): Reference to the IPA passes.
* doc/passes.texi (Pass manager): Add node IPA passes and
  description for each IPA pass.

Co-Authored-By: Sandra Loosemore <sandra@codesourcery.com>
From-SVN: r276851

ipa-reference.c: Do not include splay-tree.h

* ipa-reference.c: Do not include splay-tree.h
(reference_vars_to_consider): Turn to hash map.
(get_static_name, ipa_init, analyze_function, propagate,
stream_out_bitmap, ipa_reference_write_optimization_summary,
ipa_reference_write_optimization_summary): Update.

From-SVN: r276850

* ipa-reference.c (propagate): Fix releasing of IPA summaries.

From-SVN: r276849

[Darwin, machopic 4/n] Arrange to indirect IVARs when needed.

Objective C V2 (m64) IVAR offset refs from Apple GCC-4.x have an indirection
for m64 code on PPC (which is the only 64b user for Mach-O PIC).  Apple GCC
4.x places the indirections in the .data section, however this seems to have
been unintentional - and we are placing the indirections in the non-lazy
symbol pointers section.

gcc/ChangeLog:

2019-10-10  Iain Sandoe  <iain@sandoe.co.uk>

* config/darwin.c: Lookup Objective C metadata and force indirection
for IVAR refs.

From-SVN: r276848

[Objective-C, NeXT ABI]  Identify V2 IVAR refs by metadata.

For the NeXT 64b ABI, IVAR refs are supposed to be indirected for
Mach-O PIC.  Identify them so that we can act as needed.

gcc/objc/ChangeLog:

2019-10-10  Iain Sandoe  <iain@sandoe.co.uk>

* objc-next-metadata-tags.h (OCTI_RT_META_IVAR_REF): New.
(meta_ivar_ref): New.
* objc-next-runtime-abi-02.c
(next_runtime_abi_02_init_metadata_attributes): Create the
IVAR ref metadata identifier.
(ivar_offset_ref): Tag IVAR refs with specific metadata.

From-SVN: r276847

Add check for prefixed addresses.

2019-10-10  Michael Meissner  <meissner@linux.ibm.com>

* config/rs6000/rs6000.c (quad_address_p): Add check for prefixed
addresses.
(mem_operand_gpr): Add check for prefixed addresses.
(mem_operand_ds_form): Add check for prefixed addresses.
(rs6000_legitimate_offset_address_p): If we support prefixed
addresses, check for a 34-bit offset instead of 16-bit.
(rs6000_legitimate_address_p): Add check for prefixed addresses.
Do not allow load/store with update if the address is prefixed.
(rs6000_mode_dependent_address):  If we support prefixed
addresses, check for a 34-bit offset instead of 16-bit.

From-SVN: r276846

Documentation hyperlinks for [-Wname-of-option] (PR 87488)

This patch uses the support for pretty-printing escaped URLs added in
the previous patch (PR 87488) so that in a sufficiently capable terminal
the [-Wname-of-option] emitted at the end of each diagnostic becomes a
hyperlink to the documentation for that option on the GCC website.

I've tested it with Fedora 30's GNOME Terminal (3.32.2 with VTE 0.56.3);
the option text is printed with a dotted underline, hovering shows the
URL, and on right-clicking it offers menu items to visit/copy the URL.

gcc/ChangeLog:
PR 87488
* Makefile.in (CFLAGS-opts.o): Pass in DOCUMENTATION_ROOT_URL via
-D.
* configure.ac (--with-documentation-root-url): New option.
* configure: Regenerate.
* diagnostic-format-json.cc (json_end_diagnostic): If there is an
option URL, add it as a new string field of the diagnostic option.
* diagnostic.c (diagnostic_initialize): Initialize get_option_url.
(print_option_information): If get_option_url is non-NULL, call
it, and if the result is non-NULL, potentially emit an escape
sequence to markup the option text with the resulting URL.
* diagnostic.h (diagnostic_context::get_option_url): New callback.
* doc/invoke.texi (-fdiagnostics-format=): Add "option_url" to
example of JSON output.
* opts-diagnostic.h (get_option_url): New decl.
* opts.c (get_option_url): New function.
* toplev.c (general_init): Initialize the get_option_url callback.

gcc/testsuite/ChangeLog:
PR 87488
* c-c++-common/diagnostic-format-json-2.c: Expect an "option_url"
field.
* c-c++-common/diagnostic-format-json-3.c: Likewise.
* gfortran.dg/diagnostic-format-json-2.F90: Likewise.
* gfortran.dg/diagnostic-format-json-3.F90: Likewise.
* jit.dg/test-error-array-bounds.c (create_code): Ensure that
error messages don't contain escaped URLs.

From-SVN: r276843

[PATCH 1/3] S/390: Do not use signaling vector comparisons on z13

z13 supports only non-signaling vector comparisons.  This means we
cannot vectorize LT, LE, GT, GE and LTGT when compiling for z13.  Notify
middle-end about this by using more restrictive operator predicate in
vcond<V_HW:mode><V_HW2:mode>.

gcc/ChangeLog:

2019-10-10  Ilya Leoshkevich  <iii@linux.ibm.com>

PR target/77918
* config/s390/vector.md (vcond_comparison_operator): New
predicate.
(vcond<V_HW:mode><V_HW2:mode>): Use vcond_comparison_operator.

From-SVN: r276842

pretty-print: support URL escape sequences (PR 87488)

https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
describes an emerging standard for embedding URLs in escape sequences
for marking up text output.  This is supported e.g. by recent releases
of GNOME Terminal.

This patch adds support to our pretty-printing framework for emitting
URLs.

A followup patch uses this to add URLs to the pertinent documentation
for the output of -fdiagnostics-show-option.

gcc/ChangeLog:
PR 87488
* common.opt (fdiagnostics-urls=): New option.
(diagnostic-url.h): Add SourceInclude.
(diagnostic_url_rule): New enum.
* diagnostic-color.c: Include "diagnostic-url.h".
(diagnostic_urls_enabled_p): New function.
* diagnostic-url.h: New file.
* diagnostic.c: Include "diagnostic-url.h".
(diagnostic_urls_init): New function.
* diagnostic.h (diagnostic_urls_init): New decl.
* doc/invoke.texi (Diagnostic Message Formatting Options): Add
-fdiagnostics-urls to the list.
(-fdiagnostics-urls): New option.
* gcc.c (driver_handle_option): Handle OPT_fdiagnostics_urls_.
(driver::global_initializations): Call diagnostic_urls_init.
* opts-global.c (init_options_once): Likewise.
* opts.c (common_handle_option): Handle OPT_fdiagnostics_urls_.
* pretty-print.c (pretty_printer::pretty_printer): Initialize
show_urls.
(pp_begin_url): New function.
(pp_end_url): New function.
(selftest::test_urls): New selftest.
(selftest::pretty_print_c_tests): Call it.
* pretty-print.h (pretty_printer::show_urls): New field.
(pp_begin_url): New decl.
(pp_end_url): New decl.

gcc/testsuite/ChangeLog:
PR 87488
* lib/prune.exp (TEST_ALWAYS_FLAGS): Add -fdiagnostics-urls=never.

From-SVN: r276841

PR libstdc++/91057 fix bootstrap failure on powerpc

PR libstdc++/91057
* src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
(find_ldbl_sync_facet): Fix parameter type and missing return.

From-SVN: r276840

re PR target/92022 (ICE in alpha_handle_trap_shadows, at config/alpha/alpha.c:8847)

PR target/92022
* config/alpha/alpha.c (alpha_handle_trap_shadows): Skip DEBUG_INSN.

testsuite/ChangeLog:

PR target/92022
* g++.dg/pr92022.C: New test.

From-SVN: r276839

[Ada] Handling up-level references in loops within library-level declarations

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* exp_ch7.adb (Check_Unnesting_In_Decls_Or_Stmts): When
encountering a loop at the top level of a package declaration
list (that is, within the declarations of a package spec or
body) that has nested subprograms, call Unnest_Loop to create a
new library-level procedure that will contain the loop, to allow
for proper handling of up-level references from within nested
subprograms, such as to loop parameters.
(Unnest_Loop): New procedure that takes a loop statement and
creates a new procedure body to enclose the loop statement,
along with generating a call to the procedure.

From-SVN: r276836

[Ada] Ensure constructor is a C++ constructor

2019-10-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* freeze.adb (Freeze_Subprogram): Ensure constructor is a C++
constructor.

From-SVN: r276835

[Ada] Add pragma Preelaborable_Initialization to Stream_IO.File_Type

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* libgnat/a-ststio.ads (File_Type): Apply pragma
Preelaborable_Initialization to the type.

From-SVN: r276834

[Ada] Fix inlining of subprograms with deep param/result in GNATprove

2019-10-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Do not peek
under private types whose completion is SPARK_Mode Off.

From-SVN: r276833

[Ada] Various minor typo fixes

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* exp_ch4.adb, sem_cat.adb, sem_ch12.adb, sem_ch3.adb,
sem_ch6.adb, sem_prag.adb, sem_util.adb, sem_util.ads: Minor
typo fixes.

From-SVN: r276832

[Ada] Spurious warning on call with out parameter in expression function

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Useless_Assignment): Do not warn if the
second assignment is at the same source position as the first.

From-SVN: r276831

[Ada] Unnesting issues with entry families and accept statements

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* sem_util.adb (Enclosing_Subprogram): Handle the case of
E_Entry_Family, returning the entry family's associated
Protected_Body_Subprogram (as was already done for E_Entry).
* exp_ch9.adb (Expand_N_Accept_Statement): Call Reset_Scopes_To
on the block created for an accept statement to reset the scopes
of any local entities to the block scope.

From-SVN: r276830

[Ada] Spurious visibility error on formal package with Abstract_State

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_ch12.adb (Analyze_Formal_Package_Declaration): Propagate
an aspect specification for Abstract_State from generic package
to formal package, so that it is available when analyzing the
constructed formal.

From-SVN: r276829

[Ada] Fix awkward placement of freeze node for actual subtype

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch6.adb (Set_Actual_Subtypes): Put the freeze node of the
actual subtype after its declaration when the type of the formal
has a predicate.

From-SVN: r276828

[Ada] Get rid of spurious error for _Tag on extension with reverse bit order

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch13.adb (Adjust_Record_For_Reverse_Bit_Order): Do not use
the Esize of the component to compute its layout, but only the
Component_Clause.  Do not issue a warning for the _Tag
component.  Also set the Esize of the component at the end of
the layout.
(Analyze_Record_Representation_Clause): Remove Hbit local
variable.  Lay out the Original_Record_Component only if it's
distinct from the component.
(Check_Record_Representation_Clause): Fix off-by-one bug for the
Last_Bit of the artificial clause built for the _Tag component.

From-SVN: r276827

[Ada] Debug procedure for printing ancestors

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* treepr.ads, treepr.adb (ppar): New procedure.

From-SVN: r276826

[Ada] 'others' in conditional_expressions

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* sem_aggr.adb (Resolve_Aggregate): Add missing cases in the
Others_Allowed => True case -- N_Case_Expression_Alternative and
N_If_Expression.  Use Nkind_In.
* atree.adb, atree.ads, sinfo.adb, sinfo.ads (Nkind_In): New
16-parameter version.

From-SVN: r276824

[Ada] Missing Predicated_Parent link on array Itype

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_aggr.adb (Resolve_Array_Aggregate): Set properly the
Predicated_Parent link of an itype created for an aggregate, so
that the predicate_function of the parent can support proofs on
the object that it initializes.

From-SVN: r276823

[Ada] Plug minor loophole for integer named number

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch3.adb (Analyze_Number_Declaration): Set
Debug_Info_Needed in the case where the expression is an integer
literal.

From-SVN: r276822

[Ada] Do not inline subprograms with deep parameter/result in GNATprove

2019-10-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Add subprograms
with deep parameter or result type as not candidates for
inlining.

From-SVN: r276821

[Ada] Define default value for Process field

2019-10-10  Vadim Godunko  <godunko@adacore.com>

gcc/ada/

* libgnat/g-exptty.ads (TTY_Process_Descriptor): Set default
value for Process.

From-SVN: r276820

[Ada] T'Size in pragma Compile_Time_Error

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* sem_prag.adb (Defer_Compile_Time_Warning_Error_To_BE): In
addition to saving the pragma for further processing, copy the
pragma into the main unit if necessary.

From-SVN: r276819

[Ada] Assertion_Policy (Ignore) ignores invariants

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* einfo.ads, einfo.adb (Invariants_Ignored): New flag on types.
This leaves just one unused flag.
* sem_prag.adb (Invariant): Set the flag if appropriate.
* exp_util.adb (Make_Invariant_Call): Check the flag.

From-SVN: r276818

[Ada] Fix handling of -gnatceg on incomplete unit

2019-10-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* gnat1drv.adb (Gnat1drv): Skip code generation when handling an
incomplete unit with -gnatceg.

From-SVN: r276817

[Ada] Generation of procedures for blocks occurring in elaboration code for LLVM

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* exp_ch7.adb (Check_Unnesting_Elaboration_Code): Various
cleanups.
(Set_Elab_Proc): New procedure to create the defining identifier
for a procedure created to encapsulate top-level blocks
occurring as a part of library package elaboration.
(First_Local_Scope): Function replaced by
Reset_Scopes_To_Elab_Proc.
(Reset_Scopes_To_Elab_Proc): New recursive procedure based on
First_Local_Scope, which it replaces, that is called to traverse
the statements of a library package body to locate top-level
blocks and determine whether they contain nested subprograms
that might address library-level objects of the package. Such
blocks (and loops) and certain top-level subprograms within the
statements will have their Scope reset here to match an
encapsulating procedure created by
Check_Unnesting_Elaboration_Code that will contain the
statements.
(Check_Unnesting_In_Decls_Or_Stmts): Code for handling blocks
factored out into Unnest_Block. Add handling for package
declarations and bodies, making recursive calls for
visible/private declarations, body declarations, statements, and
exception handlers. Also remove test for Is_Compilation_Unit:
caller tests for Is_Library_Level_Entity instead.  Also, this
proc's name was changed from Check_Unnesting_In_Declarations.
(Check_Unnesting_In_Handlers): New procedure to traverse a
sequence of exception handlers, calling
Check_Unnesting_In_Decls_Or_Stmts on the statements of each
handler.
(Expand_N_Package_Body): Call Check_Unnesting_* routines only
when Unnest_Subprogram_Mode is set and the current scope is a
library-level entity (which includes packages and instantiations
nested directly within a library unit).
(Expand_N_Package_Declaration): Call Check_Unnesting_* routines
only when Unnest_Subprogram_Mode is set and the current scope is
a library-level entity (which includes packages and
instantiations nested directly within a library unit).
(Unnest_Block): New procedure factored out of
Check_Unnesting_In_Decls_Or_Stmts, for creating a new procedure
to replace a block statement and resetting the Scope fields of
the block's top-level entities.

From-SVN: r276816

[Ada] Mention GNAT Studio instead of GPS

2019-10-10  Anthony Leonardo Gracio  <leonardo@adacore.com>

gcc/ada/

* doc/gnat_ugn/about_this_guide.rst,
doc/gnat_ugn/building_executable_programs_with_gnat.rst,
doc/gnat_ugn/getting_started_with_gnat.rst,
doc/gnat_ugn/gnat_and_program_execution.rst, errout.ads,
exp_ch3.adb, gnatls.adb, impunit.adb, lib-writ.ads, opt.ads,
sem_ch7.adb, sem_prag.adb, sem_res.adb, sem_warn.adb,
terminals.c: Replace GPS by GNAT Studio.
* gnat_ugn.texi: Regenerate.

From-SVN: r276815

[Ada] Spurious restriction violation on Ghost code

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* exp_ch6.adb (Expand_Simple_Function_Return_Statement): If the
function to which the return statement applies is an
Ignored_Ghost_Function, do not indicate that it uses the
secondary stack when the return type is unconstrained.

From-SVN: r276814

[Ada] Replace in Ordered_Maps gets tampering failure

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* libgnat/a-cbdlli.adb, libgnat/a-cbhama.adb,
libgnat/a-cbhase.adb, libgnat/a-cbmutr.adb,
libgnat/a-cborma.adb, libgnat/a-cborse.adb,
libgnat/a-cdlili.adb, libgnat/a-cidlli.adb,
libgnat/a-cihama.adb, libgnat/a-cihase.adb,
libgnat/a-cimutr.adb, libgnat/a-ciorma.adb,
libgnat/a-ciorse.adb, libgnat/a-cobove.adb,
libgnat/a-cohama.adb, libgnat/a-cohase.adb,
libgnat/a-coinve.adb, libgnat/a-comutr.adb,
libgnat/a-conhel.adb, libgnat/a-convec.adb,
libgnat/a-coorma.adb, libgnat/a-coorse.adb (Reference,
Constant_Reference): Use Busy instead of Lock, so we forbid
tampering with cursors, rather than tampering with elements.

From-SVN: r276813

[Ada] Spurious visibility error in predicate in generic instance

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_cat.adb (Set_Categorization_From_Pragma): Do not modify
any visibility settings if there are no compilation_unit pragmas
following the package declaration. Add comments for future
cleanup.

From-SVN: r276812

[Ada] Flag Sec_Stack_Used incorrectly set by ghost code

2019-10-10  Patrick Bernardi  <bernardi@adacore.com>

gcc/ada/

* bindgen.adb (System_Secondary_Stack_Package_In_Closure):
Renamed flag System_Secondary_Stack_Used to be clearer of what
it represents.
(Gen_Adainit): Refactor secondary stack related code to make it
clearer.
* rtsfind.adb (Load_RTU): Don't set Sec_Stack_Used flag here
(RTE): Set Sec_Stack_Used if the System.Secondary_Stack is
referenced, but not if we're ignoring ghost code.

From-SVN: r276811

[Ada] Use declared type for deciding on SPARK pointer rules

2019-10-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_prag.adb (Analyze_Global_In_Decl_Part): Simplify previous
test, just like in a recent commit we simplified a similar test
for Depends contract.

From-SVN: r276810

re PR target/88630 (Incorrect float negating together with convertion to int on ST-40)

gcc/
PR target/88630
* config/sh/sh.h (TARGET_FPU_SH4_300): New macro.
* config/sh/sh.c (sh_option_override): Enable fsca and fsrra insns
also for TARGET_FPU_SH4_300.
(sh_emit_mode_set): Check for TARGET_FPU_SH4_300 instead of
TARGET_SH4_300.
* config/sh/sh.md (toggle_pr): Add TARGET_FPU_SH4_300 condition.
(negsf2): Expand to either negsf2_fpscr or negsf2_no_fpscr.
(*negsf2_i): Split into ...
(negsf2_fpscr, negsf2_no_fpscr): ... these new patterns.
(abssf2): Expand to either abssf2_fpsc or abssf2_no_fpsc.
(**abssf2_i): Split into ...
(abssf2_fpscr, abssf2_no_fpscr): ... these new patterns.
(negdf2): Expand to either negdf2_fpscr or negdf2_no_fpscr.
(*negdf2_i): Split into ...
(negdf2_fpscr, negdf2_no_fpscr): ... these new patterns.
(absdf2): Expand to either absdf2_fpscr or absdf2_no_fpsc.
(**abssf2_i): Split into ...
(absdf2_fpscr, absdf2_no_fpscr): ... these new patterns.

From-SVN: r276809

Make comp_ptr_ttypes_real return bool.

comp_ptr_ttypes_real could use bool instead of int since it only returns
0 or 1.

* typeck.c (comp_ptr_ttypes_real): Change the return type to bool.
Use false instead of 0.

From-SVN: r276808

re PR middle-end/92046 (Command line options (that are per-functions) are affecting --params which are global.)

2019-10-10  Richard Biener  <rguenther@suse.de>

PR middle-end/92046
* opts.c (finish_options): Do not influence global --params
from options that are adjustable per function.
* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
Apply --param adjustment based on active cost-model.
* tree-ssa-phiopt.c (cond_if_else_store_replacement): Disable
further store-sinking when vectorization or if-conversion
are not enabled.

From-SVN: r276807

re PR middle-end/92037 (LTO bootstrap broken in selftests)

PR middle-end/92037
* cgraph.c (symbol_table_test::symbol_table_test): Use ggc_alloc
rather than ggc_alloc_cleared to alloc symbol table.
* toplev.c (general_init): Likewise.
* cgraph.h (symbol_table): Explicitly construct every field.

From-SVN: r276804

lto-common.c (unify_scc): Do not merge anonymous NAMESPACE_DECLs.

2019-10-10  Richard Biener  <rguenther@suse.de>

* lto-common.c (unify_scc): Do not merge anonymous NAMESPACE_DECLs.

From-SVN: r276796

S/390: Add support for z15 as CPU name.

So far z15 was identified as arch13. After the machine has been
announced we can now add the real name.

gcc/ChangeLog:

2019-10-10  Andreas Krebbel  <krebbel@linux.ibm.com>

* common/config/s390/s390-common.c (PF_ARCH13): Rename to...
(PF_Z15): ... this.
* config.gcc: Add z15 as option for --with-arch and --with-tune
configure switches.
* config/s390/s390-c.c (s390_resolve_overloaded_builtin): Add
error reporting for unsupported builtins.
* config/s390/s390-opts.h (enum processor_type): Rename
PROCESSOR_8561_ARCH13 to PROCESSOR_8561_Z15.
* config/s390/8561.md: Rename arch13 to z15 throughout the file.
* config/s390/driver-native.c (s390_host_detect_local_cpu):
Likewise.
* config/s390/s390-builtins.def: Likewise.
* config/s390/s390.c (processor_table): Add z15 as option and keep arch13 as alternative.
(s390_expand_builtin): Add missing check for unsupported builtins.
(s390_canonicalize_comparison): Rename TARGET_ARCH13 to TARGET_Z15.
(s390_rtx_costs): Likewise.
(s390_get_sched_attrmask): Rename arch13 to z15.
(s390_get_unit_mask): Likewise.
(s390_is_fpd): Likewise.
(s390_is_fxd): Likewise.
* config/s390/s390.h (enum processor_flags): Likewise.
* config/s390/s390.md: Likewise.
* config/s390/vector.md: Likewise.
* config/s390/vx-builtins.md: Likewise.
* config/s390/s390.opt: Add z15 to processor_type value.

From-SVN: r276792

[Fortran, OpenMP] Actually pass use_device_addr on to the middle end

        * trans-openmp.c (gfc_trans_omp_clauses): Actually pass
        use_device_addr on to the middle end.

From-SVN: r276791

S/390: PR91035 Fix call to __morestack

For the call to __morestack we use a special ABI in the S/390 back-end
which requires us to emit a parameter block to the .rodata section.
It contains the label whereto __morestack needs to return.  The
parameter block needs to be explicit in RTL since we also need to take
the address of it loaded into r1 in order to pass its address to
__morestack.  In order to express correctly what __morestack does its
RTX also contained the return label. Hence we had the return label to
occur twice in the insn stream.  This is problematic when it comes to
redirecting edges.  The correlation between these two occurrences of
the label cannot be expressed so when doing a redirect only the label
in the jump RTX gets modified while the parameter block label stays as
is.

The patch avoids having two instancs of the label by merging the
parameter block generation and the __morestack call RTX into one. By
doing this I could also get rid of the unspec which was required for
the parameter block generation so far.

gcc/ChangeLog:

2019-10-10  Andreas Krebbel  <krebbel@linux.ibm.com>

PR target/91035
* config/s390/s390-protos.h (s390_output_split_stack_data): Add
prototype.
* config/s390/s390.md (UNSPECV_SPLIT_STACK_DATA): Remove.
("split_stack_data", "split_stack_call")
("split_stack_call_<mode>", "split_stack_cond_call")
("split_stack_cond_call_<mode>"): Remove.
("@split_stack_call<mode>", "@split_stack_cond_call<mode>"): New
insn definition.
* config/s390/s390.c (s390_output_split_stack_data): New function.
(s390_expand_split_stack_prologue): Use the merged expander.

From-SVN: r276790

c-common.h (c_omp_check_context_selector, [...]): Declare.

c-family/
* c-common.h (c_omp_check_context_selector,
c_omp_get_context_selector): Declare.
* c-omp.c (c_omp_declare_simd_clauses_to_numbers): Fix spelling
in diagnostic message.
(c_omp_check_context_selector, c_omp_get_context_selector): New
functions.
* c-attribs.c (c_common_attribute_table): Add "omp declare variant"
attribute.
(handle_omp_declare_variant_attribute): New function.
c/
* c-parser.c (c_parser_omp_all_clauses): Add NESTED_P argument, if
true, terminate processing on closing paren and don't skip to end of
pragma line.
(c_parser_omp_declare_simd): Handle also declare variant.
(omp_construct_selectors, omp_device_selectors,
omp_implementation_selectors, omp_user_selectors): New variables.
(c_parser_omp_context_selector,
c_parser_omp_context_selector_specification,
c_finish_omp_declare_variant): New functions.
(c_finish_omp_declare_simd): Handle both declare simd and
declare variant.
(c_parser_omp_declare): Handle declare variant.
cp/
* parser.h (struct cp_omp_declare_simd_data): Add variant_p member.
* parser.c (cp_ensure_no_omp_declare_simd): Handle both declare simd
and declare variant.
(cp_parser_oacc_all_clauses): Formatting fix.
(cp_parser_omp_all_clauses): Add NESTED_P argument, if true, terminate
processing on closing paren and don't skip to end of pragma line.
(cp_parser_omp_declare_simd): Add VARIANT_P argument.  Handle also
declare variant.
(omp_construct_selectors, omp_device_selectors,
omp_implementation_selectors, omp_user_selectors): New variables.
(cp_parser_omp_context_selector,
cp_parser_omp_context_selector_specification,
cp_finish_omp_declare_variant): New functions.
(cp_parser_late_parsing_omp_declare_simd): Handle also declare variant.
(cp_parser_omp_declare): Handle declare variant.
testsuite/
* c-c++-common/gomp/declare-variant-1.c: New test.
* c-c++-common/gomp/declare-variant-2.c: New test.
* c-c++-common/gomp/declare-variant-3.c: New test.
* g++.dg/gomp/this-1.C: Adjust for diagnostic message spelling fix.
* gcc.dg/gomp/declare-variant-1.c: New test.
* gcc.dg/gomp/declare-variant-2.c: New test.

From-SVN: r276789

* cp-tree.h (template_info_decl_check): Check ENABLE_TREE_CHECKING.

From-SVN: r276787

Daily bump.

From-SVN: r276786

PR tree-optimization/90879 - fold zero-equality of strcmp between a longer string and a smaller array

gcc/c-family/ChangeLog:

PR tree-optimization/90879
* c.opt (-Wstring-compare): New option.

gcc/testsuite/ChangeLog:

PR tree-optimization/90879
* gcc.dg/Wstring-compare-2.c: New test.
* gcc.dg/Wstring-compare.c: New test.
* gcc.dg/strcmpopt_3.c: Scan the optmized dump instead of strlen.
* gcc.dg/strcmpopt_6.c: New test.
* gcc.dg/strlenopt-65.c: Remove uinnecessary declarations, add
test cases.
* gcc.dg/strlenopt-66.c: Run it.
* gcc.dg/strlenopt-68.c: New test.

gcc/ChangeLog:

PR tree-optimization/90879
* builtins.c (check_access): Avoid using maxbound when null.
* calls.c (maybe_warn_nonstring_arg): Adjust to get_range_strlen change.
* doc/invoke.texi (-Wstring-compare): Document new warning option.
* gimple-fold.c (get_range_strlen_tree): Make setting maxbound
conditional.
(get_range_strlen): Overwrite initial maxbound when non-null.
* gimple-ssa-sprintf.c (get_string_length): Adjust to get_range_strlen
changes.
* tree-ssa-strlen.c (maybe_diag_stxncpy_trunc): Same.
(used_only_for_zero_equality): New function.
(handle_builtin_memcmp): Call it.
(determine_min_objsize): Return an integer instead of tree.
(get_len_or_size, strxcmp_eqz_result): New functions.
(maybe_warn_pointless_strcmp): New function.
(handle_builtin_string_cmp): Call it.  Fold zero-equality of strcmp
between a longer string and a smaller array.
(get_range_strlen_dynamic): Overwrite initial maxbound when non-null.

From-SVN: r276773

Implement C++20 P0388R4, DR 1307, and DR 330.

This patch implements P0388R4, Permit conversions to arrays of unknown bound,
<http://wg21.link/p0388r4>.  CWG 393 allowed references to arrays of unknown
bound and this C++20 feature allows conversions like

  void f(int(&)[]);
  int arr[1];

  void g() { f(arr); }
  int(&r)[] = arr;

The proposal seemed fairly straightforward but it turned out to be quite
shifty.  I found out that I needed to implement DR 2352 (done), and also
DR 1307 (done in this patch).  The latter DR added wording for
list-initialization ranking of references to arrays which this proposal
extends.  DR 330 was also implemented in this patch.

PR c++/91364 - P0388R4: Permit conversions to arrays of unknown bound.
PR c++/69531 - DR 1307: Differently bounded array parameters.
PR c++/88128 - DR 330: Qual convs and pointers to arrays of pointers.
* call.c (build_array_conv): Build ck_identity at the beginning
of the conversion.
(standard_conversion): Pass bounds_none to comp_ptr_ttypes_const.
(maybe_warn_array_conv): New.
(convert_like_real): Call it.  Add an error message about converting
from arrays of unknown bounds.
(conv_get_original_expr): New.
(nelts_initialized_by_list_init): New.
(conv_binds_to_array_of_unknown_bound): New.
(compare_ics): Implement list-initialization ranking based on
array sizes, as specified in DR 1307 and P0388R.
* cp-tree.h (comp_ptr_ttypes_const): Adjust declaration.
(compare_bounds_t): New enum.
* typeck.c (comp_array_types): New bool and compare_bounds_t
parameters.  Use them.
(structural_comptypes): Adjust the call to comp_array_types.
(similar_type_p): Handle ARRAY_TYPE.
(build_const_cast_1): Pass bounds_none to comp_ptr_ttypes_const.
(comp_ptr_ttypes_real): Don't check cv-quals of ARRAY_TYPEs.  Use
comp_array_types to compare array types.  Look through arrays as per
DR 330.
(comp_ptr_ttypes_const): Use comp_array_types to compare array types.
Look through arrays as per DR 330.

* g++.dg/conversion/qual1.C: New test.
* g++.dg/conversion/qual2.C: New test.
* g++.dg/conversion/qual3.C: New test.
* g++.dg/conversion/ref2.C: New test.
* g++.dg/conversion/ref3.C: New test.
* g++.dg/cpp0x/initlist-array3.C: Remove dg-error.
* g++.dg/cpp0x/initlist-array7.C: New test.
* g++.dg/cpp0x/initlist-array8.C: New test.
* g++.dg/cpp2a/array-conv1.C: New test.
* g++.dg/cpp2a/array-conv10.C: New test.
* g++.dg/cpp2a/array-conv11.C: New test.
* g++.dg/cpp2a/array-conv12.C: New test.
* g++.dg/cpp2a/array-conv13.C: New test.
* g++.dg/cpp2a/array-conv14.C: New test.
* g++.dg/cpp2a/array-conv15.C: New test.
* g++.dg/cpp2a/array-conv16.C: New test.
* g++.dg/cpp2a/array-conv17.C: New test.
* g++.dg/cpp2a/array-conv2.C: New test.
* g++.dg/cpp2a/array-conv3.C: New test.
* g++.dg/cpp2a/array-conv4.C: New test.
* g++.dg/cpp2a/array-conv5.C: New test.
* g++.dg/cpp2a/array-conv6.C: New test.
* g++.dg/cpp2a/array-conv7.C: New test.
* g++.dg/cpp2a/array-conv8.C: New test.
* g++.dg/cpp2a/array-conv9.C: New test.
* g++.old-deja/g++.bugs/900321_01.C: Adjust dg-error.

* testsuite/23_containers/span/lwg3255.cc: Adjust test to match the
post-P0388R4 behavior.

From-SVN: r276771

Fix typo in test name.

From-SVN: r276770

[Darwin] Improve Objective-C NeXT ABI version check.

We were missing a check for the case that user's ABI was > 2 and the
codegen was for 64 bit.

gcc/ChangeLog:

2019-10-09  Iain Sandoe  <iain@sandoe.co.uk>

* config/darwin.c (darwin_override_options): Make the check for
Objective-C ABI version more specific for 64bit code.

From-SVN: r276768

[Darwin, machopic 3/n] Set a SYMBOL flag for indirections.

We are able to treat these specially where needed in legitimate address
tests (specifically, they are guaranteed to be pointer-aligned).

gcc/ChangeLog:

2019-10-09  Iain Sandoe  <iain@sandoe.co.uk>

* config/darwin.c (machopic_indirect_data_reference): Set flag to
indicate that the new symbol is an indirection.
(machopic_indirect_call_target): Likewise.
* config/darwin.h (MACHO_SYMBOL_FLAG_INDIRECTION): New.
(MACHO_SYMBOL_INDIRECTION_P): New.
(MACHO_SYMBOL_FLAG_STATIC): Adjust bit number.

From-SVN: r276767

PR c++/92032 - DR 1601: Promotion of enum with fixed underlying type.

I've been messing with compare_ics recently and noticed that we don't
implement CWG 1601, which should be fairly easy.  Thus this patch.

The motivating example is
  enum E : char { e };
  void f(char);
  void f(int);
  void g() {
    f(e);
  }
where the call to f was ambiguous but we should choose f(char).

Currently we give f(int) cr_promotion in standard_conversion, while
f(char) remains cr_std, which is worse than cr_promotion.  So I thought
I'd give it cr_promotion also and then add a tiebreaker to compare_ics.

* call.c (standard_conversion): When converting an enumeration with
a fixed underlying type to the underlying type, give it the cr_promotion
rank.
(compare_ics): Implement a tiebreaker as per CWG 1601.

* g++.dg/cpp0x/scoped_enum10.C: New test.
* g++.dg/cpp0x/scoped_enum11.C: New test.

From-SVN: r276766

Update the concepts implementation to conform to C++20.

gcc/c-family/
* c-cppbuiltin.c (c_cpp_builtins): Use new feature test values for
concepts when -std=c++2a. Bump __cpp_concepts to 201907.
* c.opt: Add -Wconcepts-ts.
* c-opts.c (c_common_post_options): Warn when -fconcepts is used
with -std=c++2a. Disable warning for -fconcepts in C++20 mode.
(set_std_cxx2a): Enable concepts by default.
gcc/cp/
* call.c (build_new_function_call): Don't evaluate concepts here.
(constraint_failure): Don't record the template.
(print_z_candidate): Don't extract the template.
* class.c (add_method): When overloading, hide ineligible special
member fns.
(check_methods): Set TYPE_HAS_COMPLEX_* here.
* constexpr.c (cxx_eval_constant_expression): Evaluate concepts.
(maybe_initialize_fundef_copies_table): Remove.
(get_fundef_copy): Use hash_map_safe_get_or_insert.
(clear_cv_and_fold_caches): Clear the satisfaction cache.
* constraint.cc (known_non_bool_p): New.
(parsing_constraint_expression_sentinel): Renamed from
expanding_constraint_sentinel.
(check_constraint_operands): New.
(check_constraint_atom): New.
(finish_constraint_binary_op): New.
(finish_constraint_or_expr): Likewise.
(finish_constraint_and_expr): Likewise.
(finish_constraint_primary_expr): Likewise.
(combine_constraint_expressions): New.
(finish_requires_expr): Add location parm.
(get_concept_definition): Return the initializer of concept definitions.
(get_template_head_requirements): New.
(get_trailing_function_requirements): New.
(deduce_constrained_parameter): Check if the identifier or template-id
is a concept definition.
(resolve_concept_definition_check): Removed.
(resolve_variable_concept_check): Removed.
(resolve_concept_check): New.
(resolve_constraint_check): Handle concept definitions.
converting arguments.
(function_concept_check_p): Removed.
(variable_concept_check_p): Removed.
(unpack_concept_check): New.
(get_concept_check_template): New.
(build_call_check): Moved and renamed to build_function_check.
(build_concept_check_arguments): make static.
(build_function_check): Always do overload resolution
in order to force conversion of template arguments (i.e., actually
check that the use of a concept is valid).
(build_standard_check): Renamed from build_real_concept_check.
(build_real_concept_check): Build checks for C++2a concepts by
(build_wildcard_concept_check): New.
(build_concept_check): Use build_real_concept_check. New overload.
(build_constraints): Save expressions, not normalized constraints.
(build_concept_id): New. Pass tf_warning_or_error.
(build_type_constraint): New.
(finish_type_constraints): New.
(associate_classtype_constraints): Also add constraints to union
types. Note the original declaration in errors. Don't return
error_mark_node in order to avoid an assertion later.
(push_down_pack_expansion): Remove.
(finish_shorthand_constraint): Make fold expressions, not naked
parameter packs. Always apply the constraint to each template argument.
(check_introduction_list): New. Fail if not enough
names are introduced.
(finish_template_introduction): Don't normalize constraints. Pass
tsubst flags. Check for insufficient introductions.
(placeholder_extract_concept_and_args): Handle the template-id case.
Unpack function concept checks correctly.
(tsubst_simple_requirement): Return errors if they occur. Don't
process as a template.
(tsubst_type_requirement): Likewise.
(type_deducible_p): New. Wrap the input expression in parens for the
purpose of deduction.
(expression_convertible_t): New.
(tsubst_compound_requirement): Use new deduction, conversion predicates.
(tsubst_nested_requirement): Return errors if they occur. Don't
process as a template. Instantiate and evaluate the nested requirement.
(tsubst_valid_expression_requirement): New.
(tsubst_simple_requirement): Use tsubst_valid_expression_requirement.
(tsubst_compound_requirement): Use tsubst_valid_expression_requirement.
(check_constaint_variables): New.
(tsubst_constraint_variables): Check that type substitutions are valid.
(tsubst_requires_expr): Likewise. Produce new requires-exprs during
template substitution. Copy the previous local specialization stack,
so references to non-local parameters can be found. Use cp_unevaluated.
(tsubst_constraint): New. Don't evaluate concept checks.
(subst_info): New.
(norm_info): New. Used to build a normalization tree for concept check
diagnostics.
(debug_parameter_mapping): New.
(debug_argument_list): New.
(expand_concept): Removed.
(normalize_logical_operation): Pass subst_info through call.
(normalize_pack_expansion): Remove.
(normalize_simple_requirement): Removed
(normalize_type_requirement): Removed
(normalize_compound_requirement): Removed
(normalize_nested_requirement): Removed
(normalize_requirement): Removed
(normalize_requirements): Removed
(normalize_requires_expression): Removed
(normalize_variable_concept_check): Removed.
(normalize_function_concept_check): Removed.
(normalize_concept_check): Merged all normalize_*_check here.
Substitute through written template arguments before normalizing the
definition. Only substitute the innermost template arguments.
(check_for_logical_overloads): Delete.
(map_arguments): New. Associate template parameters with arguments.
(build_parameter_mapping): New. Extract used parameters.
(normalize_expression): Rewrite.
(normalize_conjunction): Removed
(normalize_disjunction): Removed
(normalize_predicate_constraint): Removed
(normalize_parameterized_constraint): Removed
(normalized_map): New variable.
(get_normalized_constraints): New entry point for normalization.
Establishes a timer.
(get_normalized_constraints_from_info): New.
(get_normalized_constraints_from_decl): New. Turn on template processing
prior to normalization. Handle inheriting ctors. Build the
normalization arguments from the full set of template parameters of the
most general template. This guarantees that we have no concrete arguments
in the parameter mapping (e.g., from template members of class
templates). Cache normalizations.
(normalize_concept_definition): New. Cache normalizations.
(normalize_template_requirements): New.
(normalize_nontemplate_requirements): New.
(normalize_constraint_expression): New.
(tsubst_parameter_mapping): New.
(get_mapped_args): New.
(parameter_mapping_equivalent_p): New. Use template_args_equal.
(atomic_constraints_identical_p): New.
(hash_atomic_constraint): New.
(satisfying_constraint_p): New. Guard against recursive evaluation of
constraints during satisfaction.
(satisfy_conjunction): New.
(satisfy_disjunction): New.
(sat_entry): New class for hashing satisfaction results.
(sat_hasher): New hash traits.
(sat_cache): New.
(get_satisfaction): New. Returns cached satisfaction result.
(save_satisfaction): New. Caches a satisfaction result.
(clear_satisfaction_cache): New.
(satisfaction_cache): New. Helps manage satisfaction cache requests.
(decl_satisfied_cache): New.
(satisfy_atom): New.
(satisfy_constraint_r): New.
(satisfy_constraint): Use new satisfaction algorithm.
(evaluate_concept_check): New.
(evaluate_concept): Removed.
(evaluate_function_concept): Removed.
(evaluate_variable_concept): Removed.
(satisfy_constraint_expression): New.
(constraint_expression_satisfied_p): New.
(constraints_satisfied_p): Use strip_inheriting_ctors. Use
push_/pop_access_scope.
(more_constrained): Normalize before calling out to subsumption. Allow
classes as arguments.
(strictly_subsumes): Allow non-templates as arguments. Accept a new
template argument.
(weakly_subsumes): New.
(at_least_as_constrained): Removed.
(diagnose_other_expression): Removed.
(diagnose_predicate_constraint): Removed.
(diagnose_pack_expansion): Removed.
(diagnose_check_constraint): Removed.
(diagnose_logical_constraint): Removed.
(diagnose_expression_constraint): Removed.
(diagnose_type_constraint): Removed.
(diagnose_implicit_conversion_constraint): Removed.
(diagnose_argument_deduction_constraint): Removed.
(diagnose_exception_constraint): Removed.
(diagnose_parameterized_constraint): Removed.
(diagnose_argument_deduction_constraint): Removed.
(diagnose_argument_deduction_constraint): Removed.
(diagnose_argument_deduction_constraint): Removed.
(diagnose_trait_expr): New.
(diagnose_requires_expr): New.
(diagnose_atomic_constraint): New.
(diagnose_valid_expression) Stop wrongly diagnosing valid expressions.
Don't substitute as if in template decls. This causes substitution
to generate expressions that aren't suitable for use with the noexcept
routines.
(diagnose_valid_type) Likewise.
(diagnose_compound_requirement) Actually emit diagnostics for
the causes of errors.Call force_paren_expr_uneval.
(diagnose_declaration_constraints): Turn on template processing to
suppress certain analyses.
* cp-objcp-common.c (cp_common_init_ts): Make concepts typed.
(cp_get_debug_type): Use hash_map_safe_*.
* cp-tree.h: New function declarations for semantic actions, other
facilities. Remove declaration no longer used or needed. Remove
unused _CONSTR macros.
(LANG_DECL_HAS_MIN): Add CONCEPT_DECL.
(template_info_decl_check): Factor macro check into an inline function.
(DECL_TEMPLATE_INFO): Use new check facility.
(finish_concept_definition): New. Don't invalid concept declarations
with invalid initializers.
(find_template_parameters): New.
(concept_definition_p): New.
(concept_check_p): New.
(variable_concept_check_p): New.
(force_paren_expr_uneval): New.
(ovl_iterator::using_p): A USING_DECL by itself was also
introduced by a using-declaration.
(struct tree_template_info): Use tree_base instead of
tree_common. Add tmpl and args fields.
(TI_TEMPLATE, TI_ARGS): Adjust.
(DECLTYPE_FOR_INIT_CAPTURE): Remove.
(CONSTR_CHECK, CONSTR_INFO, CONSTR_EXPR, CONSTR_CONTEXT): New.
(ATOMIC_CONSTR_MAP, TRAIT_EXPR_LOCATION): New.
(struct tree_trait_expr): Add locus field.
(enum tsubst_flags): Add tf_norm as a hint to generate normalization
context when diagnosing constraint failure.
* cp-tree.def: Remove unused _CONSTR nodes and rename PRED_CONSTR
to ATOMIC_CONSTR.
(CONCEPT_DECL): New.
* cxx-pretty-print.c: Remove constraint printing code.
(pp_cxx_concept_definition): New.
(pp_cxx_template_declaration): Print concept definitions.
(pp_cxx_check_constraint): Update printing for concept definitions.
(pp_cxx_nested_name_specifier): Fix a weird
case where we're printing '::::' for concepts.
(simple_type_specifier): Print requirements for placeholder types.
(pp_cxx_constrained_type_spec): Print the associated requirements of
a placeholder type.
(pp_cxx_compound_requirement): Add space before the '->'.
(pp_cxx_parameter_mapping): Print the parameter mapping.
(pp_cxx_atomic_constraint): Use the function above.
* decl.c (redeclaration_error_message): New error for concepts.
(grokdeclarator): Check for and disallow decltype(auto) in parameter
declarations.
(grokfndecl): Don't normalize constraints. Add check for constraints
on declaration.
(grokvardecl): Don't normalize constraints.
(grok_special_member_properties): Don't set TYPE_HAS_COMPLEX_*.
(function_requirements_equivalent_p): New. Compare trailing
requires clauses. Compare combined constraints in pre-C++20 mode.
(decls_match): Compare trailing requires clauses. Compare template
heads for function templates. Remove old constraint comparison.
Simplify comparison of functions, function templates.
(duplicate_function_template_decls): New. Refactor a nasty if
condition into a single predicate.
(require_deduced_type): Don't complain if we already complained about
deduction failure.
(finish_function): Perform auto deduction to ensure that constraints
are checked even when functions contain no return statements. Only do
auto deduction if we haven't previously seen any return statements.
This prevents multiple diagnostics of the same error.
(store_decomp_type): Remove.
(cp_finish_decomp): Use hash_map_safe_put.
* error.c: Remove constraint printing code.
(dump_decl): Dump concept definitions. Handle wildcard declarations.
(dump_template_decl): Likewise.
(dump_type): Print associated requirements for placeholder
types.
(rebuild_concept_check): New.
(maybe_print_single_constraint_context): New.
(maybe_print_constraint_context): Recursively print nested contexts.
* init.c (get_nsdmi): Use hash_map_safe_*.
* lambda.c (maybe_add_lambda_conv_op): Bail if deduction failed.
(add_capture): Copy parameter packs from init.
(lambda_capture_field_type): Always use auto for init-capture.
* logic.cc: Completely rewrite.
(constraint_hash): New.
(clause/ctor): Save atoms in the hash table.
(replace): Save atoms during replacement.
(insert): Save atoms during insertion.
(contains): Only search the hash table for containment.
(clause): Keep a hash of atomic constraints.
(clause::clause): Explicitly copy the hash table when copying.
(disjunction_p, conjunction_p, atomic_p, dnf_size, cnf_size): New.
(diagnose_constraint_size): New.
(subsumes_constraints_nonnull): Compare the sizes of normalized formula
to determine the cheapest decomposition.
* name-lookup.c (diagnose_name_conflict): Diagnose name issues with
concepts.
(matching_fn_p): Check constraints.
(push_class_level_binding_1): Move overloaded functions case down,
accept FUNCTION_DECL as target_decl.
* parser.c (enum required_token): New required token for auto.
(make_location): Add overload taking lexer as last parm.
(cp_parser_required_error): Diagnose missing auto.
(cp_parser_diagnose_ungrouped_constraint_plain): New.
(cp_parser_diagnose_ungrouped_constraint_plain): New.
(cp_parser_constraint_primary_expression): New. Tentatively parse the
primary expression. If that fails tentatively parse a lower
precedence expression in order to diagnose the error.
(cp_parser_check_non_logical_constraint): New. Performs a trial
parse of the right-hand-side of non-logical operators in order to
generate good diagnostics.
(cp_parser_constraint_logical_and_expression): New.
(cp_parser_constraint_logical_or_expression): New.
(cp_parser_requires_clause_expression): New.
(cp_parser_requires_clause): Renamed to cp_parser_constraint_expression.
(cp_parser_requires_clause_opt): Parse the requires-clause differently
in -fconcepts and -std=c++2a modes.
(cp_parser_requirement_list): Rename to cp_parser_requirement_seq.
Rewrite so that semicolons are parsed
along with requirements, not the sequence.
(cp_parser_simple_requirement): Expect a semicolon at end.
(cp_parser_compound_requirement): Expect a semicolon at end. Only
allow trailing-return-type with -fconcepts-ts.
(cp_parser_nested_requirement): Expect a semicolon at end. Parse
constraint-expressions.
(cp_parser_concept_definition): New. Don't fail parsing the concept
definition if the initializer is ill-formed. Don't declare the concept
before parsing the initializer.
(cp_parser_constraint_expression): Declare earlier.
(cp_parser_type_requirement): Current scope is not valid.
(cp_parser_requires_expression): Commit to the tentative parse.
(cp_parser_decl_specifier_seq): Warn when concept appears to be used
as a decl-specifier.
(cp_parser_template_declaration_after_parameters): Parse concept
definitions.
(cp_parser_template_id): Don't try to resolve a concept template-id yet.
(cp_parser_template_id_expr): Resolve it as a concept check.
(cp_parser_decl_specifier_seq): Warn on 'concept bool'.
(cp_parser_type_parameter): Combine expressions not
constraints.
(cp_parser_explicit_template_declaration): Combine expressions not
constraints.
(cp_parser_maybe_concept_name): Removed.
(cp_parser_simple_type_specifier): Handle an error condition of
a bad constrained type specifier. Expect auto or decltype after
a concept name. Also handle the case where we have a template-id
as a concept check.
(cp_parser_template_introduction): Diagnose errors on invalid
introductions. Give up if it doesn't start with a concept name.
Pedwarn if not -fconcepts-ts.
(synthesize_implicit_template_parm): Don't do consistent binding.
Use a new flag for constrained parameters. Combine expressions,
not constraints. Fail if we get a placeholder in block scope.
Placeholders that do not constrain types are not allowed in parameter
declarations, so don't handle them.
(cp_parser_placeholder_type_specifier): New. Implement parsing of
placeholder type specifiers following a concept name or partial
concept check. Disallow decltype(auto) parameters.
(cp_parser_nested_name_specifier_opt): If the token is already
CPP_NESTED_NAME_SPECIFIER, leave it alone.
(cp_parser_id_expression, cp_parser_unqualified_id): Call
cp_parser_template_id_expr.
(cp_parser_placeholder_type_specifier): Add tentative parm.  Don't
expect a WILDCARD_DECL.
(cp_parser_trait_expr): Pass trait_loc down.
(cp_parser_postfix_expression): Do set location of dependent member
call.
* pt.c (finish_concept_definition): New.
(push_template_decl_real): Handle concept definitions.
(start_concept_definition): Let push_template_decl_real handle the
creation of the template.
(get_constraints): Return null if the table hasn't been initialized.
(tsubst_copy_and_build): Build template-id expressions for concept
checks.
[TRAIT_EXPR]: Pass trait_loc down.
(lookup_template_class_1): Add the template name to the constraint
failure diagnostic.
(lookup_and_finish_template_variable): Build concept checks
with the correct arguments.
(tsubst_function_decl): Don't substitute through constraints.
Always associate constraints with functions.
(template_parm_level_and_index): Make non-static.
(for_each_template_parm_r): Handle requires expressions.
(keep_template_parm): New.
(find_template_parameters): New.
(more_specialized_fn): Change how winners and losers are chosen.
(make_constrained_auto): Don't normalize constraints.
(template_parameters_equivalent_p): New. Compare template
parameters. Add a comparison for implicitly vs. explicitly declared
parameters.
(template_parameter_lists_equivalent_p): New. Compare template
parameter lists.
(template_requirements_equivalent_p): New.
(template_heads_equivalent_p): New. Compare template heads.
(template_parameter_constraints_equivalent_p): New.
(is_compatible_template_arg): Use weakly_subsumes.
(maybe_new_partial_specialization): Use new constraint comparison
for finding specializations.
(process_partial_specialization): Pass main template as argument.
(more_specialized_partial_spec): Don't immediately return when
detecting a winner.
(make_constrained_auto): Handle concept definitions.
(do_auto_deduction): Update auto deduction for new concept model.
Extract the function concept correctly; rename constr to check to
reflect the kind of node.
(tsubst): Adjust wildcard argument during substitution.
[DECLTYPE_TYPE]: Remove init-capture handling.
(tsubst_copy_and_build): Build concept checks, not template ids.
Defer checks of function concepts. Handle concepts before variable
templates. Handle calls to function concepts explicitly.
(coerce_template_parms): Use concept_definition_p. Handle a deduction
error where a potentially empty pack can be supplied after the last
parameter of a concept.
(finish_template_variable): Don't process concepts here.
(instantiation_dependent_r): Use concept_check_p.
(tsubst_template_args): Make non-static.
(make_constrained_placeholder_type): New. Refactored from
make_constrained_auto.
(make_constrained_auto) Use make_constrained_placeholder_type.
(make_constrained_decltype_auto) New.
(tsubst_function_parms): New.
(value_dependent_expression_p) [TEMPLATE_ID_EXPR]: Use
concept_definition_p.
(push_access_scope, pop_access_scope): No longer static.
(tsubst_template_parm): Substitute TEMPLATE_PARM_CONSTRAINTS.
(tsubst_friend_function): Use tsubst_constraint. Use generic_targs_for.
(get_underlying_template) Use generic_targs_for.
(uses_parameter_packs): Return tree.
(gen_elem_of_pack_expansion_instantiation): Don't push
local_specialization_stack.
(prepend_one_capture): New.
(tsubst_lambda_expr): Use prepend_one_capture. Don't touch
local_specializations.
(template_parms_level_to_args): No longer static.
(add_outermost_template_args): Likewise.
(find_template_parameter_info): New. Provide context for finding
template parameters.
(keep_template_parm): Don't keep parameters declared at depth levels
greater than those of the template parameters of the source declaration.
Don't propagate cv-qualified types. Return 0, so we find all template
parameters, not the just first.
(any_template_parm_r): New. Handle cases that are mishandled by
for_each_template_parm_r.
(generic_targs_for): Factor out of coerce_template_args_for_ttp.
(tsubst_argument_pack): Factor out of tsubst_template_args.
(constraint_sat_entry): Removed.
(constraint_sat_hasher): Removed.
(concept_spec_entry): Removed.
(concept_spec_hasher): Removed.
(constraint_memos): Removed.
(concept_memos): Removed.
(lookup_constraint_satisfaction): Removed.
(memoize_constraint_satisfaction): Removed.
(lookup_concept_satisfaction): Removed.
(memoize_concept_satisfaction): Removed.
(concept_expansions): Removed.
(get_concept_expansion): Removed.
(save_concept_expansion): Removed.
(init_constraint_processing): Remove initialization of non-existing
resources.
(find_template_requirement): New. Search for the sub-requirement
within the associated constraints.
(convert_generic_types_to_packs): Also transform the associated
constraint and update the current template requirements.
(store_defaulted_ttp, lookup_defaulted_ttp): Remove.
(add_defaults_to_ttp): Use hash_map_safe_*.
* semantics.c (finish_call_expr): Diagnose calls to concepts.
Handle concept checks explicitly.
(finish_id_expression): Evaluate variable concepts as part of
id-expression processing. Don't treat variable concepts as variables,
and don't process function concepts as plain id-expressions.
(force_paren_expr): Add even_uneval parm.
(finish_trait_expr): Add location parm.
* tree.c (special_memfn_p): New.
(cp_expr_location): Handle TRAIT_EXPR.
* typeck.c (check_return_expr): Actually use the diagnostic kind
when performing return-type deduction.
* typeck2.c (build_functional_cast): Don't rely on the location of
'auto'.
gcc/testsuite/
* lib/target-supports.exp (check_effective_target_concepts): Check
for std=c++2a.
gcc/
* doc/invoke.texi: Document -fconcepts-ts.

From-SVN: r276764

decl.c (grok_ctor_properties): Use DECL_SOURCE_LOCATION.

/cp
2019-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

* decl.c (grok_ctor_properties): Use DECL_SOURCE_LOCATION.
* typeck.c (cp_build_binary_op): Use the op_location_t argument
in many error messages.

/testsuite
2019-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

* c-c++-common/Waddress-1.c: Test locations too.
* c-c++-common/Wpointer-compare-1.c: Likewise.
* c-c++-common/Wshift-count-negative-1.c: Likewise.
* c-c++-common/Wshift-count-overflow-1.c: Likewise.
* c-c++-common/Wshift-negative-value-1.c: Likewise.
* c-c++-common/Wshift-negative-value-2.c: Likewise.
* c-c++-common/Wshift-negative-value-5.c: Likewise.
* c-c++-common/pr48418.c: Likewise.
* c-c++-common/pr65830.c: Likewise.
* c-c++-common/pr69764.c: Likewise.
* g++.dg/cpp0x/constexpr-array-ptr10.C: Likewise.
* g++.dg/cpp0x/nullptr37.C: Likewise.
* g++.dg/template/crash126.C: Likewise.
* g++.dg/template/crash129.C: Likewise.
* g++.dg/warn/Wextra-3.C: Likewise.
* g++.dg/warn/Wfloat-equal-1.C: Likewise.
* g++.dg/warn/Wstring-literal-comparison-1.C: Likewise.
* g++.dg/warn/Wstring-literal-comparison-2.C: Likewise.
* g++.dg/warn/pointer-integer-comparison.C: Likewise.
* g++.old-deja/g++.jason/crash8.C: Likewise.

From-SVN: r276763

PR libstdc++/91057 set locale::id::_M_index atomically

If two threads see _M_index==0 concurrently they will both try to set
it, potentially storing the facet at two different indices in the array.

Either set the _M_index data member using an atomic compare-exchange
operation or while holding a mutex.

Also move the LONG_DOUBLE_COMPAT code into a separate function to remove
the visual noise it creates.

PR libstdc++/91057
* src/c++98/locale.cc (locale::id::_M_id()) [__GTHREADS]: Use atomic
compare-exchange or double-checked lock to ensure only one thread sets
the _M_index variable.
[_GLIBCXX_LONG_DOUBLE_COMPAT]: Call find_ldbl_sync_facet to detect
facets that share another facet's ID.
[_GLIBCXX_LONG_DOUBLE_COMPAT] (find_ldbl_sync_facet): New function.

From-SVN: r276762

tree-vect-loop.c (vect_is_simple_reduction): Simplify and allow stmts other than GIMPLE_ASSIGN in nested cycles.

2019-10-09  Richard Biener  <rguenther@suse.de>

* tree-vect-loop.c (vect_is_simple_reduction): Simplify and
allow stmts other than GIMPLE_ASSIGN in nested cycles.

* gcc.dg/vect/vect-outer-call-1.c: New testcase.

From-SVN: r276760

PR libstdc++/78552 only construct std::locale for C locale once

PR libstdc++/78552
* src/c++98/locale_init.cc (locale::classic()): Do not construct a new
locale object for every call.
(locale::_S_initialize_once()): Construct C locale here.

From-SVN: r276758

[PR92036] Add 'libgomp.oacc-c-c++-common/data-firstprivate-1.c'

libgomp/
PR middle-end/92036
* testsuite/libgomp.oacc-c-c++-common/data-firstprivate-1.c: New
file.

From-SVN: r276757

avr-mmcu.texi: Re-generate because config/avr/avr-devices.c was changed in r269487.

* doc/avr-mmcu.texi: Re-generate because config/avr/avr-devices.c
was changed in r269487.

From-SVN: r276756

* config/avr/avr.md: Fix typo in a comment.

From-SVN: r276755

re PR testsuite/91884 (libgomp testsuite: (not) using a specific driver for C++, Fortran)

2019-10-09  Tobias Burnus  <tobias@codesourcery.com>

        PR testsuite/91884
        * testsuite/libgomp.fortran/fortran.exp: Conditionally
        add -lquadmath.
        * testsuite/libgomp.oacc-fortran/fortran.exp: Ditto.

From-SVN: r276754

re PR libgomp/92028 (OpenACC 'host_data' execution test regressions with nvptx offloading)

PR libgomp/92028
* target.c (gomp_map_vars_internal): Readd the previous
GOMP_MAP_USE_DEVICE_PTR handling code in the first loop,
though do that just in the !not_found_cnt case.

From-SVN: r276753

tree-vectorizer.h (_stmt_vec_info::reduc_vectype_in): New.

2019-10-08  Richard Biener  <rguenther@suse.de>

* tree-vectorizer.h (_stmt_vec_info::reduc_vectype_in): New.
(_stmt_vec_info::force_single_cycle): Likewise.
(STMT_VINFO_FORCE_SINGLE_CYCLE): New.
(STMT_VINFO_REDUC_VECTYPE_IN): Likewise.
* tree-vect-loop.c (vectorizable_reduction): Set
STMT_VINFO_REDUC_VECTYPE_IN and STMT_VINFO_FORCE_SINGLE_CYCLE.
(vect_transform_reduction): Use them to remove redundant code.
(vect_transform_cycle_phi): Likewise.

From-SVN: r276752

use call-clobbered reg to disalign the stack

Some x86 tests of stack realignment, that disaligned the stack with
pushes and pops, failed when the compiler was configured to tune for a
target that preferred to accumulate outgoing arguments: the stack
space is reserved before the asm push, the call sequence overwrites
the saved register, and then the asm pop restores the overwritten
value.  Since that's a call-preserved register in 32-bit mode, it
should be preserved unchanged, but isn't.

Merely changing the register to a call-clobbered one would be enough,
but the tests would remain fragile and prone to failure due to other
optimizations, so I arranged for the compiler to be made aware of the
register used for the push and the pop, so it won't use it for
something else, and forced the function to use a frame pointer, so
that it won't use stack pointer offsets for local variables: the
offsets would likely be wrong between the asm push and pop.

for  gcc/testsuite/ChangeLog

* gcc.target/i386/20060512-1.c (sse2_test): Use a
call-clobbered register variable for stack-disaligning push
and pop.  Require a frame pointer.
* gcc.target/i386/20060512-3.c (sse2_test): Likewise.

From-SVN: r276751

Daily bump.

From-SVN: r276750

PR c++/92001 - missing -Wclass-memaccess with array as first argument to memset

gcc/cp/ChangeLog:

PR c++/92001
* call.c (maybe_warn_class_memaccess): Handle arrays.

gcc/testsuite/ChangeLog:

PR c++/92001
* g++.dg/Wclass-memaccess-5.C: New test.

From-SVN: r276725

re PR tree-optimization/90836 (Missing popcount pattern matching)

2019-10-08  Dmitrij Pochepko <dmitrij.pochepko@bell-sw.com>

PR tree-optimization/90836
* lib/target-supports.exp (check_effective_target_popcount)
(check_effective_target_popcountll): New effective targets.
* gcc.dg/tree-ssa/popcount4.c: New test.
* gcc.dg/tree-ssa/popcount4l.c: New test.
* gcc.dg/tree-ssa/popcount4ll.c: New test.

From-SVN: r276722

re PR tree-optimization/90836 (Missing popcount pattern matching)

2019-10-08  Dmitrij Pochepko <dmitrij.pochepko@bell-sw.com>

PR tree-optimization/90836
* gcc/match.pd (popcount): New pattern.

From-SVN: r276721

PR middle-end/92026 - gcc.dg/Wstringop-overflow-18.c FAIL

PR middle-end/92026 - gcc.dg/Wstringop-overflow-18.c FAIL
PR middle-end/92014 - bogus warning: writing 8 bytes into a region of size 1 in timezone/zic.c

gcc/ChangeLog:
* tree-ssa-strlen.c (count_nonzero_bytes): Avoid recursing for MEM_REF
again once nbytes has been set.  Set the access size when not yet set.

gcc/testsuite/ChangeLog:

PR middle-end/92014
* gcc.dg/Wstringop-overflow-19.c: New test.

From-SVN: r276711

[Darwin] Remove code deprecated in 4.x.

This removes some code that should be dead.
Given no reported problems from the warning since 4.6 this seems reasonable.

gcc/ChangeLog:

2019-10-08  Iain Sandoe  <iain@sandoe.co.uk>

* config/darwin.c (machopic_select_section): Remove dead code for
old Objective-C section selection method, replace with unreachable.

From-SVN: r276709

[Darwin, machopic 2/n] Compute and cache indirection rules.

This caches a check for the requirement to indirect a symbol in the Darwin
ABI, and uses it where needed.  We also ensure that we place the indirection
pointers into the non-lazy symbol pointers section.  Other placements have
occurred with various platform toolchains - but these seem to have been
unintentional so we match current platform toolchains.

gcc/ChangeLog:

2019-10-08  Iain Sandoe  <iain@sandoe.co.uk>

* config/darwin.c (machopic_indirect_data_reference): Check for
required indirections before making direct access to defined
values.
(machopic_output_indirection): Place the indirected pointes for
required indirections into the non-lazy symbol pointers section.
(darwin_encode_section_info):
* config/darwin.h (MACHO_SYMBOL_FLAG_MUST_INDIRECT): New.
(MACHO_SYMBOL_MUST_INDIRECT_P): New.

From-SVN: r276708

re PR rtl-optimization/91994 (r276327 breaks -mvzeroupper)

PR target/91994
* config/i386/i386.c (x86_avx_u128_mode_needed): Use SSE_REG
instead of ALL_SSE_REG to check if function call preserves some
256-bit SSE registers.

From-SVN: r276707

re PR fortran/91801 (ICE in gfc_simplify_reshape, at fortran/simplify.c:6733)

2019-10-08  Steven G. Kargl  <kargl@gcc.gnu.org>

PR fortran/91801
* simplify.c (gfc_simplify_reshape): Convert a gcc_assert into a
gfc_error as a user can easily hit the condition.

2019-10-08  Steven G. Kargl  <kargl@gcc.gnu.org>

PR fortran/91801
* gfortran.dg/pr91801.f90: New test.

From-SVN: r276706

DR 685 - Integral promotion of enum ignores fixed underlying type.

* g++.dg/cpp0x/scoped_enum9.C: New test.

From-SVN: r276705

re PR testsuite/92025 (gcc.dg/Wstringop-overflow-12.c XPASSes)

gcc/testsuite/ChangeLog:

PR tetsuite/92025
* gcc.dg/Wstringop-overflow-12.c: Remove xfail.

2019-10-08  Richard Biener  <rguenther@suse.de>

From-SVN: r276703

Change the library search path when using --with-advance-toolchain

From: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>

Remove all -L directories from LINK_OS_EXTRA_SPEC32 and
LINK_OS_EXTRA_SPEC64 so that user directories specified at
build time have higher preference over the advance toolchain libraries.

Set MD_STARTFILE_PREFIX to $prefix/lib/ and MD_STARTFILE_PREFIX_1 to
$at/lib/ so that a compiler library has preference over the Advance
Toolchain libraries.

* config.gcc: Move -L usage from LINK_OS_EXTRA_SPEC32 and
LINK_OS_EXTRA_SPEC64 to MD_STARTFILE_PREFIX and
MD_STARTFILE_PREFIX_1 when using --with-advance-toolchain.

From-SVN: r276702