vect: Factor out and rename some functions/macros

Power supports vector memory access with length (in bytes) instructions.
Like existing fully masking for SVE, it is another approach to vectorize
the loop using partially-populated vectors.

As Richard Sandiford suggested, we should share the codes in approaches
with partial vectors if possible.  This patch is to:
  1) factor out two functions:
     - vect_min_prec_for_max_niters
     - vect_known_niters_smaller_than_vf.
  2) rename four functions:
     - vect_iv_limit_for_full_masking
     - check_load_store_masking
     - vect_set_loop_condition_masked
     - vect_set_loop_condition_unmasked
  3) rename macros LOOP_VINFO_MASK_COMPARE_TYPE and LOOP_VINFO_MASK_IV_TYPE.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop-manip.c (vect_set_loop_controls_directly): Rename
LOOP_VINFO_MASK_COMPARE_TYPE to LOOP_VINFO_RGROUP_COMPARE_TYPE.  Rename
LOOP_VINFO_MASK_IV_TYPE to LOOP_VINFO_RGROUP_IV_TYPE.
(vect_set_loop_condition_masked): Renamed to ...
(vect_set_loop_condition_partial_vectors): ... this.  Rename
LOOP_VINFO_MASK_COMPARE_TYPE to LOOP_VINFO_RGROUP_COMPARE_TYPE.  Rename
vect_iv_limit_for_full_masking to vect_iv_limit_for_partial_vectors.
(vect_set_loop_condition_unmasked): Renamed to ...
(vect_set_loop_condition_normal): ... this.
(vect_set_loop_condition): Rename vect_set_loop_condition_unmasked to
vect_set_loop_condition_normal.  Rename vect_set_loop_condition_masked
to vect_set_loop_condition_partial_vectors.
(vect_prepare_for_masked_peels): Rename LOOP_VINFO_MASK_COMPARE_TYPE
to LOOP_VINFO_RGROUP_COMPARE_TYPE.
* tree-vect-loop.c (vect_known_niters_smaller_than_vf): New, factored
out from ...
(vect_analyze_loop_costing): ... this.
(_loop_vec_info::_loop_vec_info): Rename mask_compare_type to
compare_type.
(vect_min_prec_for_max_niters): New, factored out from ...
(vect_verify_full_masking): ... this.  Rename
vect_iv_limit_for_full_masking to vect_iv_limit_for_partial_vectors.
Rename LOOP_VINFO_MASK_COMPARE_TYPE to LOOP_VINFO_RGROUP_COMPARE_TYPE.
Rename LOOP_VINFO_MASK_IV_TYPE to LOOP_VINFO_RGROUP_IV_TYPE.
(vectorizable_reduction): Update some dumpings with partial
vectors instead of fully-masked.
(vectorizable_live_operation): Likewise.
(vect_iv_limit_for_full_masking): Renamed to ...
(vect_iv_limit_for_partial_vectors): ... this.
* tree-vect-stmts.c (check_load_store_masking): Renamed to ...
(check_load_store_for_partial_vectors): ... this.  Update some
dumpings with partial vectors instead of fully-masked.
(vectorizable_store): Rename check_load_store_masking to
check_load_store_for_partial_vectors.
(vectorizable_load): Likewise.
* tree-vectorizer.h (LOOP_VINFO_MASK_COMPARE_TYPE): Renamed to ...
(LOOP_VINFO_RGROUP_COMPARE_TYPE): ... this.
(LOOP_VINFO_MASK_IV_TYPE): Renamed to ...
(LOOP_VINFO_RGROUP_IV_TYPE): ... this.
(vect_iv_limit_for_full_masking): Renamed to ...
(vect_iv_limit_for_partial_vectors): this.
(_loop_vec_info): Rename mask_compare_type to rgroup_compare_type.
Rename iv_type to rgroup_iv_type.

recog: Use parameter packs for operator()

This patch uses parameter packs to define insn_gen_fn::operator().
I guess in some ways it's C++-ification for its own sake, but it does
make things simpler and removes the current artificial limit of 16
arguments.

Note that the call is still strongly typed: all arguments have to have
implicit conversions to rtx.  Error messages for bad arguments look
reasonable.

I'm sure there are more elegant ways of getting the function type,
but this version at least fits on one line, so I didn't try too
hard to find an alternative.

2020-06-12  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* recog.h (insn_gen_fn::f0, insn_gen_fn::f1, insn_gen_fn::f2)
(insn_gen_fn::f3, insn_gen_fn::f4, insn_gen_fn::f5, insn_gen_fn::f6)
(insn_gen_fn::f7, insn_gen_fn::f8, insn_gen_fn::f9, insn_gen_fn::f10)
(insn_gen_fn::f11, insn_gen_fn::f12, insn_gen_fn::f13)
(insn_gen_fn::f14, insn_gen_fn::f15, insn_gen_fn::f16): Delete.
(insn_gen_fn::operator()): Replace overloaded definitions with
a parameter-pack version.

x86: Add UNSPECV_PATCHABLE_AREA

Currently patchable area is at the wrong place.  It is placed immediately
after function label, before both .cfi_startproc and ENDBR.  This patch
adds UNSPECV_PATCHABLE_AREA for pseudo patchable area instruction and
changes ENDBR insertion pass to also insert patchable area instruction.
TARGET_ASM_PRINT_PATCHABLE_FUNCTION_ENTRY is defined to avoid placing
patchable area before .cfi_startproc and ENDBR.

gcc/

PR target/93492
* config/i386/i386-features.c (rest_of_insert_endbranch):
Renamed to ...
(rest_of_insert_endbr_and_patchable_area): Change return type
to void. Add need_endbr and patchable_area_size arguments.
Don't call timevar_push nor timevar_pop.  Replace
endbr_queued_at_entrance with insn_queued_at_entrance.  Insert
UNSPECV_PATCHABLE_AREA for patchable area.
(pass_data_insert_endbranch): Renamed to ...
(pass_data_insert_endbr_and_patchable_area): This.  Change
pass name to endbr_and_patchable_area.
(pass_insert_endbranch): Renamed to ...
(pass_insert_endbr_and_patchable_area): This.  Add need_endbr
and patchable_area_size;.
(pass_insert_endbr_and_patchable_area::gate): Set and check
need_endbr and patchable_area_size.
(pass_insert_endbr_and_patchable_area::execute): Call
timevar_push and timevar_pop.  Pass need_endbr and
patchable_area_size to rest_of_insert_endbr_and_patchable_area.
(make_pass_insert_endbranch): Renamed to ...
(make_pass_insert_endbr_and_patchable_area): This.
* config/i386/i386-passes.def: Replace pass_insert_endbranch
with pass_insert_endbr_and_patchable_area.
* config/i386/i386-protos.h (ix86_output_patchable_area): New.
(make_pass_insert_endbranch): Renamed to ...
(make_pass_insert_endbr_and_patchable_area): This.
* config/i386/i386.c (ix86_asm_output_function_label): Set
function_label_emitted to true.
(ix86_print_patchable_function_entry): New function.
(ix86_output_patchable_area): Likewise.
(x86_function_profiler): Replace endbr_queued_at_entrance with
insn_queued_at_entrance.  Generate ENDBR only for TYPE_ENDBR.
Call ix86_output_patchable_area to generate patchable area if
needed.
(TARGET_ASM_PRINT_PATCHABLE_FUNCTION_ENTRY): New.
* config/i386/i386.h (queued_insn_type): New.
(machine_function): Add function_label_emitted.  Replace
endbr_queued_at_entrance with insn_queued_at_entrance.
* config/i386/i386.md (UNSPECV_PATCHABLE_AREA): New.
(patchable_area): New.

gcc/testsuite/

PR target/93492
* gcc.target/i386/pr93492-1.c: New test.
* gcc.target/i386/pr93492-2.c: Likewise.
* gcc.target/i386/pr93492-3.c: Likewise.
* gcc.target/i386/pr93492-4.c: Likewise.
* gcc.target/i386/pr93492-5.c: Likewise.

Daily bump.

c++: constrained class template friend [PR93467]

This fixes two issues in our handling of constrained class template
friend declarations.

The first issue is that we fail to set the constraints on the injected
class template declaration during tsubst_friend_class.

The second issue is that the template parameter levels within the parsed
constraints of a class template friend declaration are shifted if the
enclosing class is a template, and this shift leads to spurious
constraint mismatch errors in associate_classtype_constraints if the
friend declaration refers to an already declared class template.

gcc/cp/ChangeLog:

PR c++/93467
* constraint.cc (associate_classtype_constraints): If there is a
discrepancy between the current template depth and the template
depth of the original declaration, then adjust the template
parameter depth within the current constraints appropriately.
* pt.c (tsubst_friend_class): Substitute into and set the
constraints on the injected declaration.

gcc/testsuite/ChangeLog:

PR c++/93467
* g++.dg/cpp2a/concepts-friend6.C: New test.
* g++.dg/cpp2a/concepts-friend7.C: New test.

contrib: Make prepare-commit-msg hook smarter for amends

With this change the prepare-commit-msg hook can compare the log of a
commit being amended with the staged changes, and not run mklog.py
unnecessarily. This is controlled by a git config option,
gcc-config.mklog-hook-type.

contrib/ChangeLog:

* prepare-commit-msg: Use the gcc-config.mklog-hook-type Git
config key instead of the GCC_FORCE_MKLOG environment variable.
Optionally disable generating a new ChangeLog template for
amended commits when the existing log is still OK.

PR fortran/95611 - ICE in access_attr_decl, at fortran/decl.c:9075

When reporting a duplicate access specification of an operator, refer to
the proper symbol.

2020-06-11  Harald Anlauf <anlauf@gmx.de>

gcc/fortran/
PR fortran/95611
* decl.c (access_attr_decl): Use correct symbol in error message.

Co-Authored-By: Steven G. Kargl <kargl@gcc.gnu.org>

PR fortran/95544 - Fix ICE in NULL() argument to intrinsics

Fortran 2018: An argument to an intrinsic procedure other than ASSOCIATED,
NULL, or PRESENT shall be a data object.  An EXPR_NULL is not a data
object.  Add checks for intrinsics.

2020-06-11  Steven G. Kargl  <kargl@gcc.gnu.org>
    Harald Anlauf  <anlauf@gmx.de>

gcc/fortran/
PR fortran/95544
* check.c (invalid_null_arg): Rename to gfc_invalid_null_arg.
(gfc_check_associated, gfc_check_kind, gfc_check_merge)
(gfc_check_shape, gfc_check_size, gfc_check_spread)
(gfc_check_transfer): Adjust.
(gfc_check_len_lentrim, gfc_check_trim): Check for NULL() argument.
* gfortran.h: Declare gfc_invalid_null_arg ().
* intrinsic.c (check_arglist): Check for NULL() argument.

coroutines: Handle lambda closure pointers like 'this'.

It was agreed amongst the implementors that the correct
interpretation of the standard is that lambda closure pointers
should be treated in the same manner as class object pointers.

gcc/cp/ChangeLog:

* coroutines.cc (instantiate_coro_traits): Pass a reference
to lambda closure objects to traits instantiation.
(morph_fn_to_coro): Likewise for promise parameter
preview and allocator lookup.

libstdc++: Fix istream::ignore discarding too many chars (PR 94749)

The current code assumes that if the next character in the stream is
equal to the delimiter then we stopped because we saw that delimiter,
and so discards it.  But in the testcase for the PR we stop because we
reached the maximum number of characters, and it's coincidence that the
next character equals the delimiter. We should not discard the next
character in that case.

The fix is to check that we haven't discarded __n characters already,
instead of checking whether the next character equals __delim. Because
we've already checked for EOF, if we haven't discarded __n yet then we
know we stopped because we saw the delimiter. On the other hand, if the
next character is the delimiter we don't know if that's why we stopped.

PR libstdc++/94749
* include/bits/istream.tcc (basic_istream::ignore(streamsize, CharT)):
Only discard an extra character if we didn't already reach the
maximum number.
* src/c++98/istream.cc (istream::ignore(streamsiz, char))
(wistream::ignore(streamsize, wchar_t)): Likewise.
* testsuite/27_io/basic_istream/ignore/char/94749.cc: New test.
* testsuite/27_io/basic_istream/ignore/wchar_t/94749.cc: New test.

Testsuite: Mark check_effective_target_exceptions_enabled test as C++ test input.

The test in check_effective_target_exceptions_enabled uses a C++ keyword `throw`
and the test fails with a syntax error on any non-g++ test.  I now tell the
testsuite driver that this is a C++ input file so it runs it as such in all the
drivers.

gcc/testsuite/ChangeLog:

* lib/target-supports.exp (check_effective_target_exceptions_enabled):
Mark as C++ test input.

PR fortran/95503 - Fix ICE in gfc_is_simply_contiguous, at fortran/expr.c:5844

The check for assigning a pointer that cannot be determined to be simply
contiguous at compile time to a contiguous pointer does not need to be
invoked if the lhs of the assignment is known to have conflicting attributes.

2020-06-11  Harald Anlauf  <anlauf@gmx.de>

gcc/fortran/
PR fortran/95503
* expr.c (gfc_check_pointer_assign): Skip contiguity check of rhs
of pointer assignment if lhs cannot be simply contiguous.

gcc/testsuite/
PR fortran/95503
* gfortran.dg/pr95503.f90: New test.

PR95331 - Unlimited polymorphic arrays have wrong bounds.

When iterating over a class array use the bounds provided by the
transformed descriptor (in sym->backend_decl) instead of the original
bounds of the array (in the descriptor passed in the class _data)
which are passed in se->expr.

The patch partially depends on the patch for PR52351 and PR85868, but
does not seems to break anything by itself.

gcc/fortran/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/95331
* trans-array.c (gfc_conv_array_ref): For class array dummy
arguments use the transformed descriptor in sym->backend_decl
instead of the original descriptor.

gcc/testsuite/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/95331
* gfortran.dg/PR95331.f90: New test.

aix: xfail pure-virtual1.C expects weak __cxa_pure_virtual

The testcase expects __cxa_pure_virtual to be weak to avoid an
implicit dependency.  This does not occur on AIX, so expect this testcase
to fail on AIX.

gcc/testsuite/ChangeLog

2020-06-11  David Edelsohn  <dje.gcc@gmail.com>

* g++.dg/abi/pure-virtual1.C: XFAIL AIX.

Fix formatting in rs6000.c.

gcc/ChangeLog:

* config/rs6000/rs6000.c (rs6000_density_test): Fix GNU coding
style.

aix: Don't implicitly include inttypes.h

AIX stdio.h implicitly includes inttypes.h, which explicitly conflicts
with the purpose of this testcase.  This patch conditionally adds a macro
definition that inhibits the implicit inclusion.

gcc/testsuite/ChangeLog

2020-06-11  David Edelsohn  <dje.gcc@gmail.com>

* gcc.dg/spellcheck-inttypes.c: Don't include inttypes.h on AIX.

rs6000: skip debug info statements

gcc/ChangeLog:

PR target/95627
* config/rs6000/rs6000.c (rs6000_density_test): Skip debug
statements.

Wrong array section bounds when passing to an intent-in pointer dummy.

Add code to allow for the creation a new descriptor for array
sections with the correct one based indexing.

Rework the generated descriptors indexing (hopefully) fixing the
wrong offsets generated.

gcc/fortran/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/52351
PR fortran/85868
* trans-array.c (gfc_conv_expr_descriptor): Enable the
creation of a new descriptor with the correct one based
indexing for array sections.  Rework array descriptor
indexing offset calculation.

gcc/testsuite/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/52351
PR fortran/85868
* gfortran.dg/coarray_lib_comm_1.f90: Adjust match test for
the newly generated descriptor.
* gfortran.dg/PR85868A.f90: New test.
* gfortran.dg/PR85868B.f90: New test.

git_update_version: add --current argument.

The argument can be useful to update arbitrary branch, the changes
are added to git index and user is supposed to make a commit.

contrib/ChangeLog:

* gcc-changelog/git_update_version.py: Add --curent argument.

Patch to Bug 94022 - Array slices of assumed-size arrays.

Make sure that when passing array sections of assumed-size arrays to
procedures expecting an assumed-rank array the upper bound of the
last dimension of the array section does not get improperly reset
to -1 to mark it has an assumed size array.

gcc/fortran/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/94022
* trans-expr.c (gfc_conv_procedure_call): In the case of
assumed-size arrays ensure that the reference is to a full array.

gcc/testsuite/ChangeLog:

2020-06-11  José Rui Faustino de Sousa  <jrfsousa@gmail.com>

PR fortran/94022
* gfortran.dg/PR94022.f90: New test.

[Ada] Fix missing insertion of explicit dereference in instance

2020-06-11  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_res.adb (Resolve_Implicit_Dereference): In an instance,
reset the type of the prefix if it is private before building
the dereference.

[Ada] Fix assertion failure on entry call through unchecked conversion

2020-06-11  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_util.adb (Safe_Unchecked_Type_Conversion): Add missing
Is_Type guard before calling Has_Discriminants on Etype.

[Ada] Make libgnat/a-nbnbin__gmp.adb compile

2020-06-11  Bob Duff  <duff@adacore.com>

gcc/ada/

* libgnat/a-nbnbin__gmp.adb: There's no Optional_Big_Integer
anymore.  Invalid_Big_Integer is not used.
Greatest_Common_Divisor returns Big_Positive.

[Ada] Refine type of a routine parameter from Node_Id to Entity_Id

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Get_Value): Refine type of the Compon parameter.

[Ada] Refine type of a counter-like variable

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Resolve_Record_Aggregate): Refine type of
Others_Box.

[Ada] Iterate with procedural version of Next routine where possible

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* checks.adb, exp_ch7.adb, exp_ch9.adb, exp_smem.adb, lib.adb,
nlists.adb, sem.adb, sem_aggr.adb, sem_ch3.adb, sem_ch6.adb,
sem_ch8.adb, sem_dim.adb, sem_res.adb, sem_util.adb,
sem_warn.adb: Replace uses of Next function with procedure.

[Ada] Fix wrong access to large bit-packed arrays with reverse SSO

2020-06-11  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_pakd.ads: Add paragraph about scalar storage order.
* exp_pakd.adb (Install_PAT): Do not set the scalar storage
order of the PAT here but...
(Set_PB_Type): ...here instead and...
(Create_Packed_Array_Impl_Type): ...here as well.
* rtsfind.ads (RE_Id): Add RE_Rev_Packed_Bytes{1,2,4}.
(RE_Unit_Table): Likewise.
* libgnat/s-unstyp.ads (Rev_Packed_Bytes1): New derived type.
(Rev_Packed_Bytes2): Likewise.
(Rev_Packed_Bytes4): Likewise.

[Ada] Update SPARK RM rule numbers after removing a redundant rule

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_ch4.adb, sem_ch6.adb, sem_res.adb, sem_util.ads: Fix
references to SPARK RM 7.1.3 rule numbers.

[Ada] Additional warnings on overlapping actuals of composite types

2020-06-11  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Overlapping_Actuals): Simplify code,
remove inner predicate Is_Covered_Formal, preserve warning for
two overlapping composite types when only one is writable, and
for two overlapping and writable elementary types.

[Ada] Allow specifying volatility refinement aspects for types

2020-06-11  Steve Baird  <baird@adacore.com>

gcc/ada/

* contracts.adb (Add_Contract_Item): Support specifying
volatility refinement aspects for types.
(Analyze_Contracts): Add call to Analyze_Type_Contract in the
case of a contract for a type.
(Freeze_Contracts): Add call to Analyze_Type_Contract in the
case of a contract for a type.
(Check_Type_Or_Object_External_Properties): A new procedure
which performs the work that needs to be done for both object
declarations and types.
(Analyze_Object_Contract): Add a call to
Check_Type_Or_Object_External_Properties and remove the code in
this procedure which did much of the work that is now performed
by that call.
(Analyze_Type_Contract): Implement this new routine as nothing
more than a call to Check_Type_Or_Object_External_Properties.
* contracts.ads: Update comment for Add_Contract_To_Item because
types can have contracts.  Follow (questionable) precedent and
declare new routine Analyze_Type_Contract as visible (following
example of Analyze_Object_Contract), despite the fact that it is
never called from outside of the package where it is declared.
* einfo.adb (Contract, Set_Contract): Id argument can be a type;
support this case.
(Write_Field34_Name): Field name is "contract" for a type.
* einfo.ads: Update comment describing Contract attribute.
* sem_ch3.adb (Build_Derived_Numeric_Type): Is_Volatile should
return same answer for all subtypes of a given type. Thus, when
building the base type for something like type Volatile_1_To_10
is range 1 .. 10 with Volatile; that basetype should be marked
as being volatile.
(Access_Type_Declaration): Add SPARK-specific legality check
that the designated type of an access type shall be compatible
with respect to volatility with the access type.
* sem_ch12.adb (Check_Shared_Variable_Control_Aspects): Add
SPARK-specific legality check that an actual type parameter in
an instantiation shall be compatible with respect to volatility
with the corresponding formal type.
* sem_ch13.adb (Analyze_Aspect_Specifications): Perform checks
for aspect specs for the 4 volatility refinement aspects that
were already being performed for all language-defined aspects.
* sem_prag.adb (Analyze_External_Property_In_Decl_Part,
Analyze_Pragma): External properties (other than No_Caching) may
be specified for a type, including a generic formal type.
* sem_util.ads: Declare new subprograms - Async_Readers_Enabled,
Async_Writers_Enabled, Effective_Reads, Effective_Writes, and
Check_Volatility_Compatibility.
* sem_util.adb (Async_Readers_Enabled, Async_Writers_Enabled,
Effective_Reads, Effective_Writes): Initial implementation of
new functions for querying aspect values.
(Check_Volatility_Compatibility): New procedure intended for use
in checking all SPARK legality rules of the form "<> shall be
compatible with respect to volatility with <>".
(Has_Enabled_Property): Update comment because Item_Id can be a
type.  Change name of nested Variable_Has_Enabled_Property
function to Type_Or_Variable_Has_Enabled_Property; add a
parameter to that function because recursion may be needed,
e.g., in the case of a derived typ).  Cope with the case where
the argument to Has_Enabled_Property is a type.

[Ada] Avoid "others => <>" association in resolved record aggregates

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Add_Association): Add assertion about the formal
parameters.
(Propagate_Discriminants): Always add an explicit component
association, so that an "others => <>" association is never
needed.

[Ada] Put_Image attribute

2020-06-11  Bob Duff  <duff@adacore.com>

gcc/ada/

* exp_put_image.adb (Build_Elementary_Put_Image_Call): If the
underlying type is real, call Put_Image_Unknown.
(Build_Unknown_Put_Image_Call): Pass the type name to
Put_Image_Unknown.
* libgnat/s-putima.ads, libgnat/s-putima.adb
(Put_Image_Unknown): Add Type_Name parameter.  Remove
overly-detailed documentation of what it does; better to leave
it open.

[Ada] Skip unnecessary iterations over constraint expressions

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_ch3.adb (Build_Constrained_Array_Type,
Build_Constrained_Discriminated_Type): Skip unnecessary loop
iterations.

[Ada] Move duplicated routines for building itypes to Sem_Util

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Build_Constrained_Itype): Move to Sem_Util.
* sem_ch3.adb (Build_Subtype, Inherit_Predicate_Flags): Move...
* sem_util.adb (Build_Subtype): Here.  Add parameters for
references to objects previously declared in enclosing scopes.
(Inherit_Predicate_Flags): And here, because it is called by
Build_Subtype.
* sem_util.ads (Build_Overriding_Spec): Reorder alphabetically.
(Build_Subtype): Moved from Sem_Ch3; comments updated.
(Build_Constrained_Itype): Moved from Sem_Aggr; comments
updated.

[Ada] Refine type for sorting case-choices tables

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Case_Table_Type): Change index type from Nat to
Pos.

[Ada] Create constrained itypes for nested record aggregates

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aggr.adb (Build_Constrained_Itype): Previously a declare
block, now a separate procedure; the only change is that now
New_Assoc_List might include components and an others clause,
which we ignore (while we deal with discriminants exactly as we
did before); extend a ??? comment about how this routine is
different from the Build_Subtype
(Resolve_Record_Aggregate): Create a constrained itype not just
for the outermost record aggregate, but for its inner record
aggregates as well.

[Ada] Consolidate handling of implicit dereferences into semantic analysis

2020-06-11  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* checks.adb (Build_Discriminant_Checks): Build an explicit
dereference when the type is an access type.
* exp_atag.adb (Build_CW_Membership): Add explicit dereferences.
(Build_Get_Access_Level): Likewise.
(Build_Get_Alignment): Likewise.
(Build_Inherit_Prims): Likewise.
(Build_Get_Transportable): Likewise.
(Build_Set_Size_Function): Likewise.
* exp_ch3.adb (Build_Offset_To_Top_Function): Likewise.
* exp_ch4.adb (Expand_Allocator_Expression): Likewise.
(Expand_N_Indexed_Component ): Remove code dealing with implicit
dereferences.
(Expand_N_Selected_Component): Likewise.
(Expand_N_Slice): Likewise.
* exp_ch9.adb (Add_Formal_Renamings): Add explicit dereference.
(Expand_Accept_Declarations): Likewise.
(Build_Simple_Entry_Call): Remove code dealing with implicit
dereferences.
(Expand_N_Requeue_Statement): Likewise.
* exp_disp.adb (Expand_Dispatching_Call): Build an explicit
dereference when the controlling type is an access type.
* exp_spark.adb (Expand_SPARK_N_Selected_Component): Delete.
(Expand_SPARK_N_Slice_Or_Indexed_Component): Likewise.
(Expand_SPARK): Do not call them.
* sem_ch4.adb (Process_Implicit_Dereference_Prefix): Delete.
(Process_Indexed_Component): Call Implicitly_Designated_Type
to get the designated type for an implicit dereference.
(Analyze_Overloaded_Selected_Component): Do not insert an
explicit dereference here.
(Analyze_Selected_Component): Likewise.
(Analyze_Slice): Call Implicitly_Designated_Type to get the
designated type for an implicit dereference.
* sem_ch8.adb (Has_Components): New predicate extracted from...
(Is_Appropriate_For_Record): ...this.  Delete.
(Is_Appropriate_For_Entry_Prefix): Likewise.
(Analyze_Renamed_Entry): Deal with implicit dereferences.
(Find_Selected_Component): Do not insert an explicit dereference
here.  Call Implicitly_Designated_Type to get the designated type
for an implicit dereference.  Call Has_Components, Is_Task_Type
and Is_Protected_Type directly.  Adjust test for error.
* sem_res.adb (Resolve_Implicit_Dereference): New procedure.
(Resolve_Call): Call Resolve_Indexed_Component last.
(Resolve_Entry): Call Resolve_Implicit_Dereference on the prefix.
(Resolve_Indexed_Component): Call Implicitly_Designated_Type to
get the designated type for an implicit dereference and
Resolve_Implicit_Dereference on the prefix at the end.
(Resolve_Selected_Component): Likewise.
(Resolve_Slice): Likewise.  Do not apply access checks here.
* sem_util.ads (Implicitly_Designated_Type): Declare.
* sem_util.adb (Copy_And_Maybe_Dereference): Simplify.
(Implicitly_Designated_Type): New function.
(Object_Access_Level): Fix typo.
* sem_warn.adb (Check_Unset_Reference): Test Comes_From_Source
on the original node.

[Ada] Remove a dubious optimization for Object Specific Data dispatching

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_disp.adb: Minor reformatting.
* exp_aggr.adb (Is_Static_Dispatch_Table_Aggregate): Recognize
aggregates of the Ada.Tags.Object_Specific_Data type as static.
* sem_aggr.adb (Check_Static_Discriminated_Subtype): Deconstruct
and do not call it from Build_Constrained_Itype.

[Ada] Make Object Specific Dispatch tables constant

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_disp.adb (Make_Secondary_DT): Internally generated OSD
tables are now constant.

[Ada] Remove useless code in Backend_Processing_Possible

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_aggr.adb (Backend_Processing_Possible): Remove useless
call.

[Ada] Fix punctuation in comment of Building_Static_Dispatch_Tables

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* opt.ads (Building_Static_Dispatch_Tables): Fix punctuation in
comment.

[Ada] AI12-0356 Root_Storage_Pool_With_Subpools & Preelaborable_Init

2020-06-11  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/s-stposu.ads (Root_Storage_Pool_With_Subpools,
Root_Subpool): Mark with Preelaborable_Initialization.

[Ada] Crash on dispatching conditional entry call

2020-06-11  Javier Miranda  <miranda@adacore.com>

gcc/ada/

* exp_ch9.adb (Expand_N_Conditional_Entry_Call): Replace call to
New_Copy_List by calls to the new routine
New_Copy_Separate_List.
* sem_util.ads (New_Copy_Separate_List, New_Copy_Separate_Tree):
New routines.

* sem_util.adb (New_Copy_Separate_List, New_Copy_Separate_Tree):
New routines.
(New_Copy_Tree): Extend the machinery that detects syntactic
nodes to handle lists of indentifiers with field More_Ids;
otherwise such nodes are erroneously handled as semantic nodes.
Copy aspect specifications attached to nodes.
* sem_ch12.adb (Copy_Generic_Node): Protect reading attribute
Etype.

[Ada] Fix unnesting crash with Predicate_Failure/no pred

2020-06-11  Bob Duff  <duff@adacore.com>

gcc/ada/

* sem_ch13.adb (Analyze_Aspect_Specifications): Do not set the
Has_Predicates flag when the Predicate_Failure aspect is seen.
It is legal (but pointless) to use this aspect without a
predicate.  If we set the flag, we generate a half-baked
Predicate procedure, and if that procedure is nested, it causes
unnesting to crash.

[Ada] Put_Image attribute

2020-06-11  Bob Duff  <duff@adacore.com>

gcc/ada/

* exp_put_image.adb (Build_Record_Put_Image_Procedure): Remove
special processing of protected types, because those are handled
by Build_Protected_Put_Image_Call.
(Enable_Put_Image): Use the switch -gnatd_z to control enabling
of Put_Image. Disable Put_Image for types in Remote_Types
packages.
* debug.adb: Document -gnatd_z switch.
* exp_imgv.adb, libgnat/a-stteou.ads, opt.ads: Minor cleanups.

[Ada] Simplify iteration over formal parameters for aliasing error

2020-06-11  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Overlapping_Actuals): Add label to the
outer loop and use it in the exit statement.

[Ada] Generate predicate checks for on assignments in records

2020-06-11  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

* exp_ch3.adb (Build_Assignment): Generate predicate check if
subtype mark has predicate.

[Ada] Missing accessibility error on object in type conversion

2020-06-11  Justin Squirek  <squirek@adacore.com>

gcc/ada/

* sem_util.adb (Expand_N_Attribute_Reference): Use original
nodes where required to avoid looking at the expanded tree.

[Ada] Remove aspects that were commented out

2020-06-11  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/a-catizo.ads, libgnat/a-nbnbin.ads,
libgnat/a-nbnbre.ads, libgnat/a-nubinu.ads,
libgnat/s-aoinar.ads, libgnat/s-aomoar.ads,
libgnat/s-aotase.ads, libgnat/s-stopoo.ads: Remove aspects that
we will not implement.

[Ada] Add fallback on Integer_Arithmetic

2020-06-11  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/s-aoinar.adb (Atomic_Fetch_And_Add,
Atomic_Fetch_And_Subtract): Add fallback using
compare-and-exchange, in case the integer type does not map to a
machine type.

asan: fix RTX emission for ilp32

gcc/ChangeLog:

PR sanitizer/95634
* asan.c (asan_emit_stack_protection): Fix emission for ilp32
by using Pmode instead of ptr_mode.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>

vect: Rename things related to rgroup_masks

Power supports vector memory access with length (in bytes) instructions.
Like existing fully masking for SVE, it is another approach to vectorize
the loop using partially-populated vectors.

As Richard Sandiford pointed out, we can rename the rgroup struct
rgroup_masks to rgroup_controls, rename its members mask_type to type,
masks to controls to be more generic.

Besides, this patch also renames some functions like vect_set_loop_mask
to vect_set_loop_control, release_vec_loop_masks to
release_vec_loop_controls, vect_set_loop_masks_directly to
vect_set_loop_controls_directly.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop-manip.c (vect_set_loop_mask): Renamed to ...
(vect_set_loop_control): ... this.
(vect_maybe_permute_loop_masks): Rename rgroup_masks related things.
(vect_set_loop_masks_directly): Renamed to ...
(vect_set_loop_controls_directly): ... this.  Also rename some
variables with ctrl instead of mask.  Rename vect_set_loop_mask to
vect_set_loop_control.
(vect_set_loop_condition_masked): Rename rgroup_masks related things.
Also rename some variables with ctrl instead of mask.
* tree-vect-loop.c (release_vec_loop_masks): Renamed to ...
(release_vec_loop_controls): ... this.  Rename rgroup_masks related
things.
(_loop_vec_info::~_loop_vec_info): Rename release_vec_loop_masks to
release_vec_loop_controls.
(can_produce_all_loop_masks_p): Rename rgroup_masks related things.
(vect_get_max_nscalars_per_iter): Likewise.
(vect_estimate_min_profitable_iters): Likewise.
(vect_record_loop_mask): Likewise.
(vect_get_loop_mask): Likewise.
* tree-vectorizer.h (struct rgroup_masks): Renamed to ...
(struct rgroup_controls): ... this.  Also rename mask_type
to type and rename masks to controls.

vect: Rename fully_masked_p to using_partial_vectors_p

Power supports vector memory access with length (in bytes) instructions.
Like existing fully masking for SVE, it is another approach to vectorize
the loop using partially-populated vectors.

As Richard Sandiford suggested, this patch is to update the existing
fully_masked_p field to using_partial_vectors_p.  Introduce one macro
LOOP_VINFO_USING_PARTIAL_VECTORS_P for partial vectorization checking
usage, update the LOOP_VINFO_FULLY_MASKED_P with
LOOP_VINFO_USING_PARTIAL_VECTORS_P && !masks.is_empty() and still use
it for mask-based partial vectors approach specific checks.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop-manip.c (vect_set_loop_condition): Rename
LOOP_VINFO_FULLY_MASKED_P to LOOP_VINFO_USING_PARTIAL_VECTORS_P.
(vect_gen_vector_loop_niters): Likewise.
(vect_do_peeling): Likewise.
* tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Rename
fully_masked_p to using_partial_vectors_p.
(vect_analyze_loop_costing): Rename LOOP_VINFO_FULLY_MASKED_P to
LOOP_VINFO_USING_PARTIAL_VECTORS_P.
(determine_peel_for_niter): Likewise.
(vect_estimate_min_profitable_iters): Likewise.
(vect_transform_loop): Likewise.
* tree-vectorizer.h (LOOP_VINFO_FULLY_MASKED_P): Updated.
(LOOP_VINFO_USING_PARTIAL_VECTORS_P): New macro.

vect: Rename can_fully_mask_p to can_use_partial_vectors_p

Power supports vector memory access with length (in bytes) instructions.
Like existing fully masking for SVE, it is another approach to vectorize
the loop using partially-populated vectors.

As Richard Sandiford pointed out, we should extend the existing flag
can_fully_mask_p to be more generic, to indicate whether we have
any chances with partial vectors for this loop.  So this patch
is to rename this flag to can_use_partial_vectors_p to be more
meaningful, also rename the macro LOOP_VINFO_CAN_FULLY_MASK_P
to LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P.

Bootstrapped/regtested on aarch64-linux-gnu.

gcc/ChangeLog:

* tree-vect-loop.c (_loop_vec_info::_loop_vec_info): Rename
can_fully_mask_p to can_use_partial_vectors_p.
(vect_analyze_loop_2): Rename LOOP_VINFO_CAN_FULLY_MASK_P to
LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P.  Rename saved_can_fully_mask_p
to saved_can_use_partial_vectors_p.
(vectorizable_reduction): Rename LOOP_VINFO_CAN_FULLY_MASK_P to
LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P.
(vectorizable_live_operation): Likewise.
* tree-vect-stmts.c (permute_vec_elements): Likewise.
(check_load_store_masking): Likewise.
(vectorizable_operation): Likewise.
(vectorizable_store): Likewise.
(vectorizable_load): Likewise.
(vectorizable_condition): Likewise.
* tree-vectorizer.h (LOOP_VINFO_CAN_FULLY_MASK_P): Renamed to ...
(LOOP_VINFO_CAN_USE_PARTIAL_VECTORS_P): ... this.
(_loop_vec_info): Rename can_fully_mask_p to can_use_partial_vectors_p.

prepare-commit-hook: Use gcc-config.diff-file.

contrib/ChangeLog:

* prepare-commit-msg: Replace ENV variable with a git config
value.

contrib: Avoid redundant 'git diff' in prepare-commit-msg hook

contrib/ChangeLog:

* prepare-commit-msg: Use 'tee' to save the diff to a file
instead of running 'git diff' twice.

Fix -Wformat-diag in options-save.c

The patch removes bunch of warnings:

options-save.c:12004:29: warning: unquoted identifier or keyword ‘global_options’ in format [-Wformat-diag]
12004 |     internal_error ("Error: global_options are modified in local context\n");

gcc/ChangeLog:

* optc-save-gen.awk: Quote error string.

slim up mem exprs to avoid line breaks in -fverbose-asm

An asm operand with a "VIEW_CONVERT_EXPR<struct {
  [...]
}>" will output the definition of the struct as asm code.  Oops.

Enable TDF_SLIM in print_mem_expr to avoid such line breaks.

for  gcc/ChangeLog

* print-rtl.c (print_mem_expr): Enable TDF_SLIM in dump_flags.

RISC-V: Unify the output asm pattern between gpr_save and gpr_restore pattern.

gcc/ChangeLog:

* config/riscv/riscv-protos.h (riscv_output_gpr_save): Remove.
* config/riscv/riscv-sr.c (riscv_sr_match_prologue): Update
value.
* config/riscv/riscv.c (riscv_output_gpr_save): Remove.
* config/riscv/riscv.md (gpr_save): Update output asm pattern.

RISC-V: Describe correct USEs for gpr_save pattern [PR95252]

 - Verified on rv32emc/rv32gc/rv64gc bare-metal target and rv32gc/rv64gc
   linux target with qemu.

gcc/ChangeLog:

* config/riscv/predicates.md (gpr_save_operation): New.
* config/riscv/riscv-protos.h (riscv_gen_gpr_save_insn): New.
(riscv_gpr_save_operation_p): Ditto.
* config/riscv/riscv-sr.c (riscv_remove_unneeded_save_restore_calls):
Ignore USEs for gpr_save patter.
* config/riscv/riscv.c (gpr_save_reg_order): New.
(riscv_expand_prologue): Use riscv_gen_gpr_save_insn to gen gpr_save.
(riscv_gen_gpr_save_insn): New.
(riscv_gpr_save_operation_p): Ditto.
* config/riscv/riscv.md (S3_REGNUM): New.
(S4_REGNUM): Ditto.
(S5_REGNUM): Ditto.
(S6_REGNUM): Ditto.
(S7_REGNUM): Ditto.
(S8_REGNUM): Ditto.
(S9_REGNUM): Ditto.
(S10_REGNUM): Ditto.
(S11_REGNUM): Ditto.
(gpr_save): Model USEs correctly.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/pr95252.c: New.

Daily bump.

libstdc++: Fix some ranges algos optimizations [PR95578]

ranges::copy and a number of other ranges algorithms have unwrapping
optimizations for iterators of type __normal_iterator, move_iterator and
reverse_iterator.  But in the checks that guard these optimizations we
currently only test that the iterator of the iterator/sentinel pair has
the appropriate type before proceeding with the corresponding
optimization, and do not also test the sentinel type.

This breaks the testcase in this PR because this testcase constructs via
range adaptors a range whose begin() is a __normal_iterator and whose
end() is a custom sentinel type, and then performs ranges::copy on it.
From there we bogusly perform the __normal_iterator unwrapping
optimization on this iterator/sentinel pair, which immediately leads to
a constraint failure since the custom sentinel type does not model
sentinel_for<int*>.

This patch fixes this issue by refining each of the problematic checks
to also test that the iterator and sentinel types are the same before
applying the corresponding unwrapping optimization.  Along the way, some
code simplifications are made.

libstdc++-v3/ChangeLog:

PR libstdc++/95578
* include/bits/ranges_algo.h (__lexicographical_compare_fn):
Also check that the iterator and sentinel have the same type before
applying the unwrapping optimization for __normal_iterator.
Split the check into two, one for the first iterator/sentinel
pair and another for second iterator/sentinel pair.  Remove uses
of __niter_base, and remove uses of std::move on a
__normal_iterator.
* include/bits/ranges_algobase.h (__equal_fn): Likewise.
(__copy_or_move): Likewise.  Perform similar adjustments for
the reverse_iterator and move_iterator optimizations.  Inline
the checks into the if-constexprs, and use using-declarations to
make them less visually noisy.  Remove uses of __niter_wrap.
(__copy_or_move_backward): Likewise.
* testsuite/25_algorithms/copy/95578.cc: New test.
* testsuite/25_algorithms/copy_backward/95578.cc: New test.
* testsuite/25_algorithms/equal/95578.cc: New test.
* testsuite/25_algorithms/lexicographical_compare/95578.cc: New test.
* testsuite/25_algorithms/move/95578.cc: New test.
* testsuite/25_algorithms/move_backward/95578.cc: New test.

[PR51447] restore the global reg var before returning from main

A runtime system might legitimately hold in rbx a value expected to be
preserved across the call to main, but its use as a global register
variable stops main from preserving it.

for  gcc/testsuite/ChangeLog

PR rtl-optimization/51447
* gcc.c-torture/execute/pr51447.c (main): Preserve call-saved
register.

coroutines: Make call argument handling more robust [PR95440]

build_new_method_call is supposed to be able to handle a null
arguments list pointer (when the method has no parms).  There
were a couple of places where uses of the argument list pointer
were not defended against NULL.

gcc/cp/ChangeLog:

PR c++/95440
* call.c (add_candidates): Use vec_safe_length() for
testing the arguments list.
(build_new_method_call_1): Use vec_safe_is_empty() when
checking for an empty args list.

gcc/testsuite/ChangeLog:

PR c++/95440
* g++.dg/coroutines/pr95440.C: New test.

PR middle-end/95353 - spurious -Wstringop-overflow writing to a trailing array plus offset

Also resolves:
PR middle-end/92939 - missing -Wstringop-overflow on negative index from the end of array

gcc/ChangeLog:

PR middle-end/95353
PR middle-end/92939
* builtins.c (inform_access): New function.
(check_access): Call it.  Add argument.
(addr_decl_size): Remove.
(get_range): New function.
(compute_objsize): New overload.  Only use compute_builtin_object_size
with raw memory function.
(check_memop_access): Pass new argument to compute_objsize and
check_access.
(expand_builtin_memchr, expand_builtin_strcat): Same.
(expand_builtin_strcpy, expand_builtin_stpcpy_1): Same.
(expand_builtin_stpncpy, check_strncat_sizes): Same.
(expand_builtin_strncat, expand_builtin_strncpy): Same.
(expand_builtin_memcmp): Same.
* builtins.h (check_nul_terminated_array): Declare extern.
(check_access): Add argument.
(struct access_ref, struct access_data): New structs.
* gimple-ssa-warn-restrict.c (clamp_offset): New helper.
(builtin_access::overlap): Call it.
* tree-object-size.c (decl_init_size): Declare extern.
(addr_object_size): Correct offset computation.
* tree-object-size.h (decl_init_size): Declare.
* tree-ssa-strlen.c (handle_integral_assign): Remove a call
to maybe_warn_overflow when assigning to an SSA_NAME.

gcc/testsuite/ChangeLog:

PR middle-end/95353
PR middle-end/92939
* c-c++-common/Wstringop-truncation.c: Remove an xfail.
* gcc.dg/Warray-bounds-46.c: Remove a bogus warning.
* gcc.dg/Wrestrict-9.c: Disable -Wstringop-overflow.
* gcc.dg/Wstringop-overflow-12.c: Remove xfails.
* gcc.dg/Wstringop-overflow-28.c: Same.
* gcc.dg/builtin-stringop-chk-4.c: Same.
* gcc.dg/builtin-stringop-chk-5.c: Same.
* gcc.dg/builtin-stringop-chk-8.c: Same.
* gcc.dg/strlenopt-74.c: Avoid buffer overflow.
* gcc.dg/Wstringop-overflow-34.c: New test.
* gcc.dg/Wstringop-overflow-35.c: New test.
* gcc.dg/Wstringop-overflow-36.c: New test.
* gcc.dg/Wstringop-overflow-37.c: New test.
* gcc.dg/Wstringop-overflow-38.c: New test.

libstdc++: Extend memcmp optimization in std::lexicographical_compare

Make the memcmp optimization work for std::deque iterators and safe
iterators.

Co-authored-by: Jonathan Wakely <jwakely@redhat.com>
libstdc++-v3/ChangeLog:

2020-06-08  François Dumont  <fdumont@gcc.gnu.org>
    Jonathan Wakely  <jwakely@redhat.com>

* include/bits/deque.tcc (__lex_cmp_dit): New.
(__lexicographical_compare_aux1): Define overloads for deque
iterators.
* include/bits/stl_algobase.h (__lexicographical_compare::__3way):
New static member function.
(__lexicographical_compare<true>::__3way): Likewise.
(__lexicographical_compare<true>::__lc): Use __3way.
(__lexicographical_compare_aux): Rename to
__lexicographical_compare_aux1 and declare overloads for deque
iterators.
(__lexicographical_compare_aux): Define new forwarding function
that calls __lexicographical_compare_aux1 and declare new overloads
for safe iterators.
(lexicographical_compare): Do not use __niter_base on
parameters.
* include/debug/safe_iterator.tcc
(__lexicographical_compare_aux): Define overloads for safe
iterators.
* testsuite/25_algorithms/lexicographical_compare/1.cc: Add
checks with random access iterators.
* testsuite/25_algorithms/lexicographical_compare/deque_iterators/1.cc:
New test.

avoid stmt-info allocation for debug stmts

The following avoids allocating stmt info structs for debug stmts.

2020-06-10  Richard Biener  <rguenther@suse.de>

* tree-vect-loop.c (vect_determine_vectorization_factor):
Skip debug stmts.
(_loop_vec_info::_loop_vec_info): Likewise.
(vect_update_vf_for_slp): Likewise.
(vect_analyze_loop_operations): Likewise.
(update_epilogue_loop_vinfo): Likewise.
* tree-vect-patterns.c (vect_determine_precisions): Likewise.
(vect_pattern_recog): Likewise.
* tree-vect-slp.c (vect_detect_hybrid_slp): Likewise.
(_bb_vec_info::_bb_vec_info): Likewise.
* tree-vect-stmts.c (vect_mark_stmts_to_be_vectorized):
Likewise.

tree-optimization/95576 - fix compare-debug issue with SLP vectorization

The following avoids leading debug stmts in BB vectorizer regions.

2020-06-10  Richard Biener  <rguenther@suse.de>

PR tree-optimization/95576
* tree-vect-slp.c (vect_slp_bb): Skip leading debug stmts.

* g++.dg/vect/pr95576.cc: New testcase.

aarch64: Fix an ICE in register_tuple_type [PR95523]

When registering the tuple type in register_tuple_type, the
TYPE_ALIGN (tuple_type) will be changed by -fpack-struct=n. We need to
maintain natural alignment in handle_arm_sve_h.

2020-06-10  Haijian Zhang  <z.zhanghaijian@huawei.com>

gcc/
PR target/95523
* config/aarch64/aarch64-sve-builtins.h
(sve_switcher::m_old_maximum_field_alignment): New member.
* config/aarch64/aarch64-sve-builtins.cc
(sve_switcher::sve_switcher): Save maximum_field_alignment in
m_old_maximum_field_alignment and clear maximum_field_alignment.
(sve_switcher::~sve_switcher): Restore maximum_field_alignment.

gcc/testsuite/
PR target/95523
* gcc.target/aarch64/sve/pr95523.c: New test.

[Ada] AI12-0364 Add a modular atomic arithmetic package

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/s-aomoar.ads, libgnat/s-aomoar.adb: New files.
* libgnat/s-atopar.ads: Move...
* libgnat/s-aoinar.ads: Here.
* libgnat/s-atopar.adb: Move...
* libgnat/s-aoinar.adb: Here.
* impunit.adb: Update list of runtime files.
* Makefile.rtl (GNATRTL_NONTASKING_OBJS=): Adjust.

gcc-changelog: fix parse_git_name_status for renames.

Renamed files are listed in the following format:

M gcc/ada/Makefile.rtl
M gcc/ada/impunit.adb
R097 gcc/ada/libgnat/s-atopar.adb gcc/ada/libgnat/s-aoinar.adb
R095 gcc/ada/libgnat/s-atopar.ads gcc/ada/libgnat/s-aoinar.ads
A gcc/ada/libgnat/s-aomoar.adb
A gcc/ada/libgnat/s-aomoar.ads

So 'R' is followed by a percentage number.

contrib/ChangeLog:

* gcc-changelog/git_commit.py: Fix renamed files in
parse_git_name_status.
* gcc-changelog/test_email.py: Add test for it.

c++: Fix ICE with delayed parsing of noexcept-specifier [PR95562]

Here we ICE because a DEFERRED_PARSE expression leaked to tsubst_copy.
We create these expressions for deferred noexcept-specifiers in
cp_parser_save_noexcept; they are supposed to be re-parsed in
cp_parser_late_noexcept_specifier.  In this case we never got around
to re-parsing it because the noexcept-specifier was attached to a
pointer to a function, not to a function declaration.  But we should
not have delayed the parsing here in the first place; we already
avoid delaying the parsing for alias-decls, typedefs, and friend
function declarations.  (Clang++ also doesn't delay the parsing
for pointers to function.)

gcc/cp/ChangeLog:

PR c++/95562
* parser.c (cp_parser_direct_declarator): Clear
CP_PARSER_FLAGS_DELAY_NOEXCEPT if the declarator kind is not
cdk_id.

gcc/testsuite/ChangeLog:

PR c++/95562
* g++.dg/cpp0x/noexcept60.C: New test.

[Ada] AI12-0311 New checks for language-defined units

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* snames.ads-tmpl (Name_Characters_Assertion_Check,
Name_Containers_Assertion_Check,
Name_Interfaces_Assertion_Check, Name_IO_Assertion_Check,
Name_Numerics_Assertion_Check, Name_Strings_Assertion_Check,
Name_System_Assertion_Check): New constants.
* types.ads (Characters_Assertion_Check,
Containers_Assertion_Check, Interfaces_Assertion_Check,
IO_Assertion_Check, Numerics_Assertion_Check,
Strings_Assertion_Check, System_Assertion_Check): New constants.
(All_Checks): Update accordingly.

[Ada] Don't build equivalent record aggregate if type has predicates

2020-06-10  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

* exp_ch3.adb (Build_Equivalent_Record_Aggregate): Return Empty
if Etype of record component has predicates.

[Ada] Ada 202x AI12-0192 "requires late initialization"

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* exp_ch3.adb (Build_Init_Statements): Implement the notion of
"require late initialization".

[Ada] Add missing Sloc on new explicit dereferences

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_util.adb (Copy_And_Maybe_Dereference): Temporarily copy
the parent node of the original tree when dereferencing.

[Ada] Additional warnings on overlapping actuals of composite types

2020-06-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* sem_warn.adb (Warn_On_Overlapping_Actuals): Add a warning when
two actuals in a call overlap, both are composite types that may
be passed by reference, and only one of them is writable.

[Ada] Implement AI12-0162 Memberships and Unchecked_Unions

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_ch4.adb (Expand_N_In): Use an expression with actions to
insert the PE raise statement for the Unchecked_Union case.

[Ada] Remove obsolete code in Resolve_Call

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_ch4.adb (Analyze_Call): Use idiomatic condition.
* sem_res.adb (Resolve_Call): Remove obsolete code.

[Ada] Insert explicit dereferences when building actual subtype

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* sem_util.adb (Copy_And_Maybe_Dereference): New function.
(Build_Access_Record_Constraint): Use it to copy the prefix.
(Build_Actual_Array_Constraint): Likewise.
(Build_Actual_Record_Constraint): Likewise.

[Ada] Disable unwanted warnings in Assertion_Policy(Ignore) mode

2020-06-10  Bob Duff  <duff@adacore.com>

gcc/ada/

* sem_prag.adb (Invariant): Remove the pragma removing code.  It
doesn't work to remove the pragma, because various flags are set
during Build_Invariant_Procedure_Declaration and
Build_Invariant_Procedure_Body that need to be set to avoid the
spurious warnings.
* exp_util.adb (Make_Invariant_Call): Avoid calling the
invariant-checking procedure if the body is empty. This is an
optimization.

[Ada] Fix gnatmetric switches description

2020-06-10  Vasiliy Fofanov  <fofanov@adacore.com>

gcc/ada/

* doc/gnat_ugn/gnat_utility_programs.rst: Fix gnatmetric
switches description.

[Ada] Update headers

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* repinfo-input.ads, repinfo-input.adb, repinfo.adb,
repinfo.ads: Update header.

[Ada] Improve code generated for dynamic discriminated aggregate

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_aggr.adb (In_Place_Assign_OK): Do not necessarily return
false for a type with discriminants.
(Convert_To_Assignments): Use Parent_Node and Parent_Kind more
consistently.  In the in-place assignment case, first apply a
discriminant check if need be, and be prepared for a rewritten
aggregate as a result.

[Ada] Remove more references to ASIS

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* atree.adb, contracts.adb, debug.adb, freeze.adb,
repinfo-input.adb, repinfo.adb, sem_attr.adb, sem_ch10.adb,
sem_ch13.adb, sem_ch3.adb, sem_ch5.adb, sem_ch6.adb,
sem_ch8.adb, sem_ch9.adb, sem_disp.adb, sem_eval.adb,
sem_prag.adb: Remove more references to ASIS.

[Ada] Fix typo in exception message

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* libgnat/s-secsta.adb (Round_Up): Fix typo in exception
message.

[Ada] Fix minor typo in comment of membership choice parsing

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* par-ch4.adb (P_Membership_Test): Fix typo in a grammar rule.

[Ada] Revert workaround for expansion of Enum_Rep in GNATprove mode

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_spark.adb (Expand_SPARK_N_Attribute_Reference): Remove
expansion of First and Last attributes.

[Ada] Fold Enum_Rep attribute in evaluation and not in expansion

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Remove folding
for Enum_Rep attribute.
* exp_spark.adb (Expand_SPARK_N_Attribute_Reference): Remove
duplicated code for folding Enum_Rep attribute.
* sem_attr.adb (Eval_Attribute): Relax condition for folding
Enum_Rep attribute; previously dead code is now executed when
the attribute prefix is an enumeration literal; refine type in
processing of Enum_Val.

[Ada] Classwide controlled obj not dispatching

2020-06-10  Javier Miranda  <miranda@adacore.com>

gcc/ada/

* sem_ch3.adb (Analyze_Declarations): Adjust the machinery that
takes care of late body overriding of initialize, adjust,
finalize.  Remove ASIS mode code.

[Ada] Ada_2020 AI12-0220: Pre/Postconditions on Access_To_Subprogram types

2020-06-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

* einfo.ads (Access_Subprogram_Wrapper): New attribute of
Subprogram_Type entities. Denotes subprogram constructed for
Access_To_Subprogram types that include pre- and postconditions.
* einfo.adb: Subprogram bodies for Access_Subprogram_Wrapper.
* exp_ch6.adb (Expand_Call): An indirect call through an
Access_To_subprogram that includes contracts is rewritten as a
call to the corresponding Access_ ubprogram_Wrapper. Handle
derived types that inherit contract from parent.
* sem_prag.adb (Build_Access_Subprogram_Wrapper): Build
subprogram declaration for subprogram that incorporates the
contracts of an Access_To_Subprogram type declaration. Build
corresponding body and attach it to freeze actions for type.
* sem_util.ads, sem_util.adb (Is_Access_Subprogram_Wrapper):
Utility that uses signature of the subprogram to determine
whether it is a generated wrapper for an Access_To_Subprogram
type.

[Ada] Fix assertion failure on functions with contracts

2020-06-10  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

* par-ch6.adb (P_Subprogram): Make sure the specification
belongs to a procedure.

[Ada] Simplify detection of static membership choices

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_ch13.adb (All_Membership_Choices_Static): Assert an AST
property documented in sinfo.ads and simplify an excessive
condition.

[Ada] Minor fix style and typos in comments

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* exp_attr.adb (Expand_N_Attribute_Reference): Fix a copy-paste
mistake in comment.
* sem_res.adb (Flag_Effectively_Volatile_Objects): Fix a type in
the SPARK RM rule number.
* exp_ch4.adb, sem_util.adb: Fix style in single line comments.

[Ada] Remove unreferenced GNATprove utility routine Get_Low_Bound

2020-06-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

* sem_aux.ads, sem_aux.adb (Get_Low_Bound): Remove.

[Ada] Remove Determine_License

2020-06-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

* scn.adb (Determine_License): Remove.

[Ada] Incorrect accessibility checks on functions calls

2020-06-10  Justin Squirek  <squirek@adacore.com>

gcc/ada/

* exp_ch3.adb (Expand_N_Object_Declaration): Add condition to
handle processing of objects initialized by a call to a function
return an anonymous access type.
* exp_ch6.adb, exp_ch6.ads
(Has_Unconstrained_Access_Discriminants): Moved to sem_util.adb
(Needs_Result_Accessibility_Level): Moved to sem_util.adb
* sem_util.adb, sem_util.ads
(Has_Unconstrained_Access_Discriminants): Moved from exp_ch6.adb
(Needs_Result_Accessibility_Level): Moved from exp_ch6.adb
* sem_res.adb (Valid_Conversion): Add condition for the special
case where the operand of a conversion is the result of an
anonymous access type

[Ada] Reject illegal bodies for null procedures

2020-06-10  Ghjuvan Lacambre  <lacambre@adacore.com>

gcc/ada/

* par-ch6.adb (P_Subprogram): Reject duplicate subprogram
declarations.

[Ada] Fix incorrect insertion of post-call actions in if-expression

2020-06-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

* exp_ch6.adb (Insert_Post_Call_Actions): Deal with the context
of an if-expression and with a call written in prefixed notation.

[Ada] Minor reformatting and some typo fixes

2020-06-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

* einfo.ads: Minor reformatting of a comment.
* exp_aggr.adb: Minor reformatting and a grammar correction.
* exp_attr.adb: Minor reformatting and a typo fix in some
comments.
* sem_ch12.adb: Fix three typos in comments.