gcc.git
4 years agoipa-modref: Fix comment typos
Jakub Jelinek [Fri, 6 Nov 2020 12:20:51 +0000 (13:20 +0100)]
ipa-modref: Fix comment typos

2020-11-06  Jakub Jelinek  <jakub@redhat.com>

* ipa-modref-tree.h: Fix comment typos.
* ipa-modref.c: Likewise.

4 years agoIBM Z: Remove override of inline params
Andreas Krebbel [Fri, 6 Nov 2020 11:58:59 +0000 (12:58 +0100)]
IBM Z: Remove override of inline params

We have pretty aggressive values for inline-min-speedup and
max-inline-insns-auto. This unfortunately made more maybe
uninitialized warnings to appear when building on Z.

With the patch we go back to the default values.

gcc/ChangeLog:

* config/s390/s390.c (s390_option_override_internal): Remove
override of inline params.

4 years agotree-optimization/97706 - part one, refactor vect_determine_mask_precision
Richard Biener [Fri, 6 Nov 2020 10:11:42 +0000 (11:11 +0100)]
tree-optimization/97706 - part one, refactor vect_determine_mask_precision

This computes vect_determine_mask_precision in a RPO forward walk
rather than in a backward walk and using a worklist.  It will make
fixing PR97706 easier but for bisecting I wanted it to be separate.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97706
* tree-vect-patterns.c (vect_determine_mask_precision):
Remove worklist operation.
(vect_determine_stmt_precisions): Do not call
vect_determine_mask_precision here.
(vect_determine_precisions): Compute mask precision
in a forward walk.

4 years agoOpenACC/Fortran: Reject '!$acc atomic update capture'
Tobias Burnus [Fri, 6 Nov 2020 11:30:20 +0000 (12:30 +0100)]
OpenACC/Fortran: Reject '!$acc atomic update capture'

gcc/fortran/ChangeLog:

* openmp.c (gfc_match_oacc_atomic): No longer accept 'update capture'.

gcc/testsuite/ChangeLog:

* gfortran.dg/goacc-gomp/goacc-gomp.exp: New.
* gfortran.dg/goacc-gomp/atomic.f90: New test.
* gfortran.dg/goacc/atomic.f90: New test.

4 years agoOpenACC (C/C++): Fix 'acc atomic' parsing
Tobias Burnus [Fri, 6 Nov 2020 10:13:47 +0000 (11:13 +0100)]
OpenACC (C/C++): Fix 'acc atomic' parsing

gcc/c/ChangeLog:

* c-parser.c (c_parser_omp_atomic): Add openacc parameter and update
OpenACC matching.
(c_parser_omp_construct): Update call.

gcc/cp/ChangeLog:

* parser.c (cp_parser_omp_atomic): Add openacc parameter and update
OpenACC matching.
(cp_parser_omp_construct): Update call.

gcc/testsuite/ChangeLog:

* c-c++-common/goacc-gomp/atomic.c: New test.
* c-c++-common/goacc/atomic.c: New test.

4 years agotree-optimization/97732 - fix init of SLP induction vectorization
Richard Biener [Fri, 6 Nov 2020 08:35:27 +0000 (09:35 +0100)]
tree-optimization/97732 - fix init of SLP induction vectorization

This PR exposes two issues - one that the vector builder treats
&x as eligible for VECTOR_CST elements and one that SLP induction
vectorization forgets to convert init elements to the vector
component type which makes a difference for pointer vs. integer.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97732
* tree-vect-loop.c (vectorizable_induction): Convert the
init elements to the vector component type.
* gimple-fold.c (gimple_build_vector): Use CONSTANT_CLASS_P
rather than TREE_CONSTANT to determine if elements are
eligible for VECTOR_CSTs.

* gcc.dg/vect/bb-slp-pr97732.c: New testcase.

4 years agoAdd dg-require-profiling directives to gcc.target/i386 tests
Olivier Hainque [Fri, 28 Feb 2020 10:57:20 +0000 (10:57 +0000)]
Add dg-require-profiling directives to gcc.target/i386 tests

This patch adds /* { dg-require-profiling "-pg" } */
to a few tests in gcc.target/i386 that use -pg explicitly, to
prevent them from failing during runs for VxWorks targets.

2020-10-29  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* gcc.target/i386/fentryname1.c: Add dg-require-profiling.
* gcc.target/i386/fentryname2.c: Likewise.
* gcc.target/i386/fentryname3.c: Likewise.
* gcc.target/i386/returninst1.c: Likewise.
* gcc.target/i386/returninst2.c: Likewise.
* gcc.target/i386/returninst3.c: Likewise.

4 years agoAdd dg-require-effective-target fpic to g++ tests
Olivier Hainque [Wed, 26 Feb 2020 17:55:09 +0000 (17:55 +0000)]
Add dg-require-effective-target fpic to g++ tests

Add missing dg-require-effective-target fpic to few
g++.dg tests.

2020-11-02  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* g++.dg/pr57878.C: Add dg-require-effective-target fpic.
* g++.dg/pr65032.C: Likewise.
* g++.dg/pr84279.C: Likewise.
* g++.dg/inherit/thunk8.C: Likewise.
* g++.dg/opt/pr64411.C: Likewise.

4 years agoAdd fnspec handling to ipa mode of ipa-modef.
Jan Hubicka [Fri, 6 Nov 2020 09:23:58 +0000 (10:23 +0100)]
Add fnspec handling to ipa mode of ipa-modef.

gcc/:

* attr-fnspec.h (attr_fnspec::get_str): New accessor
* ipa-fnsummary.c (read_ipa_call_summary): Store also parm info
for builtins.
* ipa-modref.c (class fnspec_summary): New type.
(class fnspec_summaries_t): New type.
(modref_summary::modref_summary): Initialize writes_errno.
(struct modref_summary_lto): Add writes_errno.
(modref_summary_lto::modref_summary_lto): Initialize writes_errno.
(modref_summary::dump): Check for NULL pointers.
(modref_summary_lto::dump): Dump writes_errno.
(collapse_loads): Move up in source file.
(collapse_stores): New function.
(process_fnspec): Handle also internal calls.
(analyze_call): Likewise.
(analyze_stmt): Store fnspec string if needed.
(analyze_function): Initialize fnspec_sumarries.
(modref_summaries_lto::duplicate): Copy writes_errno.
(modref_write): Store writes_errno and fnspec summaries.
(read_section): Read writes_errno and fnspec summaries.
(modref_read): Initialize fnspec summaries.
(update_signature): Fix formating.
(compute_parm_map): Return true if sucessful.
(get_parm_type): New function.
(get_access_for_fnspec): New function.
(propagate_unknown_call): New function.
(modref_propagate_in_scc): Use it.
(pass_ipa_modref::execute): Delete fnspec_summaries.
(ipa_modref_c_finalize): Delete fnspec_summaries.
* ipa-prop.c: Include attr-fnspec.h.
(ipa_compute_jump_functions_for_bb):  Also compute jump functions
for functions with fnspecs.
(ipa_read_edge_info): Read jump functions for builtins.

gcc/testsuite/ChangeLog:

* gcc.dg/ipa/modref-2.c: New test.
* gcc.dg/lto/modref-2_0.c: New test.

4 years agoMove size time tables from GGC to heap
Jan Hubicka [Fri, 6 Nov 2020 09:05:11 +0000 (10:05 +0100)]
Move size time tables from GGC to heap

this patch moves size time tables out of ggc allocated memory.  This makes
sources bit cleaner and saves about 60MB of GGC memory that turns to about 45MB
of heap memory for cc1plus LTO build.

* ipa-fnsummary.h (class size_time_entry): Do not GTY annotate.
(class ipa_fnsummary): Turn size_time_table to auto_vec and
call_size_time_table to effecient vec; update constructors.
* ipa-fnsummary.c (ipa_fn_summary::account_size_time): Update.
(ipa_fn_summary::~ipa_fn_summary): Update.
(ipa_fn_summary_t::duplicate): Update.
(ipa_dump_fn_summary): Update.
(set_switch_stmt_execution_predicate): Update.
(analyze_function_body): Update.
(estimate_calls_size_and_time): Update.
(ipa_call_context::estimate_size_and_time): Update.
(ipa_merge_fn_summary_after_inlining): Update.
(ipa_update_overall_fn_summary): Update.
(inline_read_section): Update.
(ipa_fn_summary_write): Update.

4 years agoc-common: Remove DEBUG_FUNCTION from verify_sequence_points
Jakub Jelinek [Fri, 6 Nov 2020 08:52:59 +0000 (09:52 +0100)]
c-common: Remove DEBUG_FUNCTION from verify_sequence_points

While perhaps the function name might suggest that it is a verification/debugging
only routine, it is actually implementation of the -Wsequence-point warning
and so doesn't need the DEBUG_FUNCTION macro on it.

2020-11-06  Jakub Jelinek  <jakub@redhat.com>

* c-common.c (verify_sequence_points): Remove DEBUG_FUNCTION.

4 years agotree-optimization/97733 - fix SLP of reductions with zero relevant
Richard Biener [Fri, 6 Nov 2020 07:34:16 +0000 (08:34 +0100)]
tree-optimization/97733 - fix SLP of reductions with zero relevant

This adds a missing check.

2020-11-06  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97733
* tree-vect-slp.c (vect_analyze_slp_instance): If less
than two reductions were relevant or live do nothing.

4 years agoFortran: Fix type-decl for PDT / wrong-code pdt_14.f03 issue [PR97652]
Tobias Burnus [Fri, 6 Nov 2020 07:26:51 +0000 (08:26 +0100)]
Fortran: Fix type-decl for PDT / wrong-code pdt_14.f03 issue [PR97652]

Parameterized derived types are handled in a special way and start with 'Pdt'.
If the 'P' is not uppercase, gfc_get_derived_type (which calls
gfc_get_module_backend_decl) does not find the existing declaration and
builds a new type. The middle end then sees those types as being different
and nonalising, creating an endless loop for pdt_14.f03.

gcc/fortran/ChangeLog:

PR fortran/97652
* module.c (mio_symbol): Fix symbol name for pdt_type.

4 years agoImprove overflow check
Jeff Law [Fri, 6 Nov 2020 03:42:17 +0000 (20:42 -0700)]
Improve overflow check

Convert
x < (short) ((unsigned short)x + const)
to
x <= SHORT_MAX – const
(and similarly for other integral types) if const is not 0.

gcc/
PR tree-optimization/97223
* match.pd (overflow detection and optimization): Handle conversions.

gcc/testsuite/

* gcc.dg/no-strict-overflow-4.c: Adjust expected output.

4 years agoSimplify x >> x to 0. This fixes PR96701.
Eugene Rozenfeld [Fri, 6 Nov 2020 03:35:45 +0000 (20:35 -0700)]
Simplify x >> x to 0. This fixes PR96701.

gcc/
* match.pd (x >> x): New pattern.

gcc/testsuite

* gcc.dg/self-right-shift.c: New test.

4 years agoRISC-V: Mark non-export symbol static and const in riscv-common.c
Kito Cheng [Fri, 6 Nov 2020 03:05:50 +0000 (11:05 +0800)]
RISC-V: Mark non-export symbol static and const in riscv-common.c

gcc/ChangeLog:

* common/config/riscv/riscv-common.c (riscv_implied_info):
Add static and const.
(riscv_subset_list::handle_implied_ext): Add const due to
riscv_implied_info changed to const.

4 years agoPR target/96307: Fix KASAN option checking.
Kito Cheng [Mon, 5 Oct 2020 06:01:04 +0000 (14:01 +0800)]
PR target/96307: Fix KASAN option checking.

 - Disable kasan if target is unsupported and -fasan-shadow-offset= is not
   given, no matter `--param asan-stack=1` is given or not.

 - Moving KASAN option checking testcase to gcc.dg, those testcase could be
   useful for all other target which not support asan.

 - Verifed on riscv and x86.

gcc/ChangeLog:

PR target/96307
* toplev.c (process_options): Remove param_asan_stack checking for kasan
option checking.

gcc/testsuite/ChangeLog:

PR target/96307
* gcc.dg/pr96307.c: New.
* gcc.target/riscv/pr96260.c: Move this test case from here to ...
* gcc.dg/pr96260.c: ... here.
* gcc.target/riscv/pr91441.c: Move this test case from here to ...
* gcc.dg/pr91441.c: ... here.
* lib/target-supports.exp (check_effective_target_no_fsanitize_address):
New proc.

4 years agoMAINTAINERS: Add myself for write after approval.
liuhongt [Fri, 6 Nov 2020 01:27:10 +0000 (09:27 +0800)]
MAINTAINERS: Add myself for write after approval.

ChangeLog:

2019-03-17  Hongtao Liu  <hongtao.liu@intel.com>

* MAINTAINERS (Write After Approval): Add myself.

4 years agoDaily bump.
GCC Administrator [Fri, 6 Nov 2020 00:16:34 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Add auto_diagnostic_group to check_handlers_1.
Marek Polacek [Thu, 5 Nov 2020 23:23:56 +0000 (18:23 -0500)]
c++: Add auto_diagnostic_group to check_handlers_1.

This was missing.

gcc/cp/ChangeLog:

* except.c (check_handlers_1): Add auto_diagnostic_group.

4 years agoc++: Fix decltype(auto) deduction with rvalue ref [PR78209]
Marek Polacek [Tue, 3 Nov 2020 20:10:31 +0000 (15:10 -0500)]
c++: Fix decltype(auto) deduction with rvalue ref [PR78209]

Here's a small deficiency in decltype(auto).  [dcl.type.auto.deduct]/5:
If the placeholder-type-specifier is of the form decltype(auto), [...]
the type deduced for T is determined [...] as though E had been the operand
of the decltype.  So:

  int &&i = 0;
  decltype(auto) j = i; // should behave like int &&j = i; error

We deduce j's type in do_auto_deduction via finish_decltype_type which
takes an 'id' argument.  Currently we compute 'id' as false, because
stripped_init is *i (a REFERENCE_REF_P).  But it seems to me we should
rather set 'id' to true here, by looking through the REFERENCE_REF_P,
so that finish_decltype_type DTRT.

gcc/cp/ChangeLog:

PR c++/78209
* pt.c (do_auto_deduction): If init is REFERENCE_REF_P, use its
first operand.

gcc/testsuite/ChangeLog:

PR c++/78209
* g++.dg/cpp1y/decltype-auto1.C: New test.

4 years agoc++: Add -Wexceptions warning option [PR97675]
Marek Polacek [Tue, 3 Nov 2020 22:46:23 +0000 (17:46 -0500)]
c++: Add -Wexceptions warning option [PR97675]

This PR asks that we add a warning option for an existing (very old)
warning, so that it can be disabled selectively.  clang++ uses
-Wexceptions for this, so I added this new option rather than using
e.g. -Wnoexcept.

gcc/c-family/ChangeLog:

PR c++/97675
* c.opt (Wexceptions): New option.

gcc/cp/ChangeLog:

PR c++/97675
* except.c (check_handlers_1): Use OPT_Wexceptions for the
warning.  Use inform for the second part of the warning.

gcc/ChangeLog:

PR c++/97675
* doc/invoke.texi: Document -Wexceptions.

gcc/testsuite/ChangeLog:

PR c++/97675
* g++.old-deja/g++.eh/catch10.C: Adjust dg-warning.
* g++.dg/warn/Wexceptions1.C: New test.
* g++.dg/warn/Wexceptions2.C: New test.

4 years agoc++: Implement -Wvexing-parse [PR25814]
Marek Polacek [Fri, 2 Oct 2020 13:46:30 +0000 (09:46 -0400)]
c++: Implement -Wvexing-parse [PR25814]

This patch implements the -Wvexing-parse warning to warn about the
sneaky most vexing parse rule in C++: the cases when a declaration
looks like a variable definition, but the C++ language requires it
to be interpreted as a function declaration.  This warning is on by
default (like clang++).  From the docs:

  void f(double a) {
    int i();        // extern int i (void);
    int n(int(a));  // extern int n (int);
  }

  Another example:

  struct S { S(int); };
  void f(double a) {
    S x(int(a));   // extern struct S x (int);
    S y(int());    // extern struct S y (int (*) (void));
    S z();         // extern struct S z (void);
  }

You can find more on this in [dcl.ambig.res].

I spent a fair amount of time on fix-it hints so that GCC can recommend
various ways to resolve such an ambiguity.  Sometimes that's tricky.
E.g., suggesting default-initialization when the class doesn't have
a default constructor would not be optimal.  Suggesting {}-init is also
not trivial because it can use an initializer-list constructor if no
default constructor is available (which ()-init wouldn't do).  And of
course, pre-C++11, we shouldn't be recommending {}-init at all.

I also uncovered a bug in cp_parser_declarator, where we were setting
*parenthesized_p to true despite the comment saying the exact opposite.

gcc/c-family/ChangeLog:

PR c++/25814
* c.opt (Wvexing-parse): New option.

gcc/cp/ChangeLog:

PR c++/25814
* cp-tree.h (enum cp_tree_index): Add CPTI_EXPLICIT_VOID_LIST.
(explicit_void_list_node): Define.
(PARENTHESIZED_LIST_P): New macro.
(struct cp_declarator): Add function::parens_loc.
* decl.c (cxx_init_decl_processing): Initialize explicit_void_list_node.
(grokparms): Also break when explicit_void_list_node.
* parser.c (make_call_declarator): New location_t parameter.  Use it
to set declarator->u.function.parens_loc.
(cp_parser_lambda_declarator_opt): Pass UNKNOWN_LOCATION to
make_call_declarator.
(warn_about_ambiguous_parse): New function.
(cp_parser_init_declarator): Call warn_about_ambiguous_parse.
(cp_parser_declarator): Set *parenthesized_p to false rather than to
true.
(cp_parser_direct_declarator): Create a location for the function's
parentheses and pass it to make_call_declarator.
(cp_parser_parameter_declaration_clause): Return explicit_void_list_node
for (void).
(cp_parser_parameter_declaration_list): Set PARENTHESIZED_LIST_P
in the parameters tree.

gcc/ChangeLog:

PR c++/25814
* doc/invoke.texi: Document -Wvexing-parse.

gcc/testsuite/ChangeLog:

PR c++/25814
* g++.dg/cpp2a/fn-template16.C: Add a dg-warning.
* g++.dg/cpp2a/fn-template7.C: Likewise.
* g++.dg/lookup/pr80891-5.C: Likewise.
* g++.dg/lto/pr79050_0.C: Add extern.
* g++.dg/lto/pr84805_0.C: Likewise.
* g++.dg/parse/pr58898.C: Add a dg-warning.
* g++.dg/template/scope5.C: Likewise.
* g++.old-deja/g++.brendan/recurse.C: Likewise.
* g++.old-deja/g++.jason/template4.C: Likewise.
* g++.old-deja/g++.law/arm4.C: Likewise.
* g++.old-deja/g++.mike/for2.C: Likewise.
* g++.old-deja/g++.other/local4.C: Likewise.
* g++.old-deja/g++.pt/crash3.C: Likewise.
* g++.dg/warn/Wvexing-parse.C: New test.
* g++.dg/warn/Wvexing-parse2.C: New test.
* g++.dg/warn/Wvexing-parse3.C: New test.
* g++.dg/warn/Wvexing-parse4.C: New test.
* g++.dg/warn/Wvexing-parse5.C: New test.
* g++.dg/warn/Wvexing-parse6.C: New test.
* g++.dg/warn/Wvexing-parse7.C: New test.

libstdc++-v3/ChangeLog:

PR c++/25814
* testsuite/20_util/reference_wrapper/lwg2993.cc: Add a dg-warning.
* testsuite/25_algorithms/generate_n/87982_neg.cc: Likewise.

4 years agoPass multi-range from range_query::value_* routines
Andrew MacLeod [Thu, 5 Nov 2020 18:59:45 +0000 (13:59 -0500)]
Pass multi-range from range_query::value_*  routines

fix range-ops equal/not_equal to not reuse the result range as intermediary.
value_query::value routines should pasa multi-range in as some other rangeop
routines build into this result, so we may need better precision.

gcc/
PR tree-optimization/97725
* range-op.cc (operator_equal::fold_range): Use new tmp value.
(operator_not_equal::fold_range): Ditto.
* value-query.cc (range_query::value_of_expr): Use int_range_max
not a value_range.
(range_query::value_on_edge): Ditto.
(range_query::value_of_stmt): Ditto.
gcc/testsuite/
* gcc.dg/pr97725.c: New.

4 years agolibstdc++: Fix typo in ChangeLog entry
Jonathan Wakely [Thu, 5 Nov 2020 19:35:34 +0000 (19:35 +0000)]
libstdc++: Fix typo in ChangeLog entry

4 years agolibstdc++: Fix constraints on std::optional comparisons [PR 96269]
Jonathan Wakely [Thu, 5 Nov 2020 18:36:19 +0000 (18:36 +0000)]
libstdc++: Fix constraints on std::optional comparisons [PR 96269]

The relational operators for std::optional were using the wrong types
in the declval expressions used to constrain them. Instead of using
const lvalues they were using non-const rvalues, which meant that a type
might satisfy the constraints but then give an error when the function
body was instantiated.

libstdc++-v3/ChangeLog:

PR libstdc++/96269
* include/std/optional (operator==, operator!=, operator<)
(operator>, operator<=, operator>=): Fix types used in
SFINAE constraints.
* testsuite/20_util/optional/relops/96269.cc: New test.

4 years agoopenmp: Mark deprecated symbols in OpenMP 5.0
Kwok Cheung Yeung [Thu, 5 Nov 2020 18:11:23 +0000 (10:11 -0800)]
openmp: Mark deprecated symbols in OpenMP 5.0

2020-11-05  Ulrich Drepper  <drepper@redhat.com>
    Kwok Cheung Yeung  <kcy@codesourcery.com>

libgomp/
* Makefile.am (%.mod): Add -cpp and -fopenmp to compile flags.
* Makefile.in: Regenerate.
* fortran.c: Wrap uses of omp_set_nested and omp_get_nested with
pragmas to ignore -Wdeprecated-declarations warnings.
* icv.c: Likewise.
* omp.h.in (__GOMP_DEPRECATED_5_0): Define.
Mark omp_lock_hint_* enum values, omp_lock_hint_t, omp_set_nested,
and omp_get_nested with __GOMP_DEPRECATED_5_0.
* omp_lib.f90.in: Mark omp_get_nested and omp_set_nested as
deprecated.
* testsuite/libgomp.c++/affinity-1.C: Add -Wno-deprecated-declarations
to test options.
* testsuite/libgomp.c/affinity-1.c: Likewise.
* testsuite/libgomp.c/affinity-2.c: Likewise.
* testsuite/libgomp.c/appendix-a/a.15.1.c: Likewise.
* testsuite/libgomp.c/lib-1.c: Likewise.
* testsuite/libgomp.c/nested-1.c: Likewise.
* testsuite/libgomp.c/nested-2.c: Likewise.
* testsuite/libgomp.c/nested-3.c: Likewise.
* testsuite/libgomp.c/pr32362-1.c: Likewise.
* testsuite/libgomp.c/pr32362-2.c: Likewise.
* testsuite/libgomp.c/pr32362-3.c: Likewise.
* testsuite/libgomp.c/pr35549.c: Likewise.
* testsuite/libgomp.c/pr42942.c: Likewise.
* testsuite/libgomp.c/pr61200.c: Likewise.
* testsuite/libgomp.c/sort-1.c: Likewise.
* testsuite/libgomp.c/target-5.c: Likewise.
* testsuite/libgomp.c/target-6.c: Likewise.
* testsuite/libgomp.c/teams-1.c: Likewise.
* testsuite/libgomp.c/thread-limit-1.c: Likewise.
* testsuite/libgomp.c/thread-limit-2.c: Likewise.
* testsuite/libgomp.c/thread-limit-4.c: Likewise.
* testsuite/libgomp.fortran/affinity1.f90: Likewise.
* testsuite/libgomp.fortran/lib1.f90: Likewise.
* testsuite/libgomp.fortran/lib2.f: Likewise.
* testsuite/libgomp.fortran/nested1.f90: Likewise.
* testsuite/libgomp.fortran/teams1.f90: Likewise.

4 years agoHandle use of r18 as a TCB pointer on aarch64-vxworks
Olivier Hainque [Wed, 4 Nov 2020 08:05:06 +0000 (08:05 +0000)]
Handle use of r18 as a TCB pointer on aarch64-vxworks

Pick an alternate static chain regnum and document that
the port needs to be configured to issue -ffixed-r18 by
default.  The current definition of TARGET_OS_USES_R18 is
not honored by the common part of the back-end.

2020-11-04  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/aarch64/aarch64-vxworks.h (TARGET_OS_USES_R18):
Remove definition.
(STATIC_CHAIN_REGNUM): Redefine to 9.

4 years agolibstdc++: Use non-throwing increment in recursive_directory_iterator [PR 97731]
Jonathan Wakely [Thu, 5 Nov 2020 17:26:13 +0000 (17:26 +0000)]
libstdc++: Use non-throwing increment in recursive_directory_iterator [PR 97731]

As described in the PR, the recursive_directory_iterator constructor
calls advance(ec), but ec is a pointer so it calls _Dir::advance(bool).
The intention was to either call advance() or advance(*ec) depending
whether the pointer is null or not.

This fixes the bug and renames the parameter to ecptr to make similar
mistakes less likely in future.

libstdc++-v3/ChangeLog:

PR libstdc++/97731
* src/filesystem/dir.cc (recursive_directory_iterator): Call the
right overload of _Dir::advance.
* testsuite/experimental/filesystem/iterators/97731.cc: New test.

4 years agolibstdc++: Fix multiple definitions of std::exception_ptr functions [PR 97729]
Jonathan Wakely [Thu, 5 Nov 2020 16:19:15 +0000 (16:19 +0000)]
libstdc++: Fix multiple definitions of std::exception_ptr functions [PR 97729]

This fixes some multiple definition errors caused by the changes for
PR libstdc++/90295. The previous solution for inlining the members of
std::exception_ptr but still exporting them from the library was to
suppress the 'inline' keyword on those functions when compiling
libsupc++/eh_ptr.cc, so they get defined in that file. That produces ODR
violations though, because there are now both inline and non-inline
definitions in the library, due to the use of std::exception_ptr in
other files sucg as src/c++11/future.cc.

The new solution is to define all the relevant members as 'inline'
unconditionally, but use __attribute__((used)) to cause definitions to
be emitted in libsupc++/eh_ptr.cc as before. This doesn't quite work
however, because PR c++/67453 means the attribute is ignored on
constructors and destructors. As a workaround, the old solution
(conditionally inline) is still used for those members, but they are
given the always_inline attribute so that they aren't emitted in
src/c++11/future.o as inline definitions.

libstdc++-v3/ChangeLog:

PR libstdc++/97729
* include/std/future (__basic_future::_M_get_result): Use
nullptr for null pointer constant.
* libsupc++/eh_ptr.cc (operator==, operator!=): Remove
definitions.
* libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Define
macro to conditionally add __attribute__((__used__)).
(operator==, operator!=, exception_ptr::exception_ptr())
(exception_ptr::exception_ptr(const exception_ptr&))
(exception_ptr::~exception_ptr())
(exception_ptr::operator=(const exception_ptr&))
(exception_ptr::swap(exception_ptr&)): Always define as
inline. Add macro to be conditionally "used".

4 years agolibstdc++: Export basic_stringbuf constructor [PR 97729]
Jonathan Wakely [Thu, 5 Nov 2020 13:41:40 +0000 (13:41 +0000)]
libstdc++: Export basic_stringbuf constructor [PR 97729]

libstdc++-v3/ChangeLog:

PR libstdc++/97729
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add exports.
* src/c++20/sstream-inst.cc (basic_stringbuf): Instantiate
private constructor taking __xfer_bufptrs.

4 years agoAdd dg-require-effective-target fpic to gcc.dg test
Olivier Hainque [Tue, 7 Jan 2020 16:54:13 +0000 (16:54 +0000)]
Add dg-require-effective-target fpic to gcc.dg test

The test uses -fpic and doesn't query the target support
for that option otherwise, resulting in failure on configurations
not supporting -fpic such as VxWorks for kernel mode.

2020-11-03  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* gcc.dg/sms-12.c: Add dg-require-effective-target fpic.

4 years agoMove and adjust PROBE_STACK reg definitions for aarch64
Olivier Hainque [Fri, 13 Dec 2019 09:09:18 +0000 (09:09 +0000)]
Move and adjust PROBE_STACK reg definitions for aarch64

The change moves the definitions of PROBE_STACK_FIRST_REG
and PROBE_STACK_SECOND_REG to a more appropriate place for such
items (here, in aarch64.md as suggested by Richard), and adjusts
their value from r9/r10 to r10/r11 to free r9 for a possibly
more general purpose (e.g. as a static chain at least on targets
which have a private use of r18, such as Windows or Vxworks).

2020-11-07  Olivier Hainque  <hainque@adacore.com>

gcc/
* config/aarch64/aarch64.md: Define PROBE_STACK_FIRST_REGNUM
and PROBE_STACK_SECOND_REGNUM constants, designating r10/r11.
Replacements for the PROBE_STACK_FIRST/SECOND_REG constants in
aarch64.c.
* config/aarch64/aarch64.c (PROBE_STACK_FIRST_REG): Remove.
(PROBE_STACK_SECOND_REG): Remove.
(aarch64_emit_probe_stack_range): Adjust to the _REG -> _REGNUM
suffix update for PROBE_STACK register numbers.

4 years agoAdd fnspecs for C++ new and delete operators
Jan Hubicka [Thu, 5 Nov 2020 17:19:07 +0000 (18:19 +0100)]
Add fnspecs for C++ new and delete operators

gcc/ChangeLog:

* gimple.c (gimple_call_fnspec): Handle C++ new and delete.
* gimple.h (gimple_call_from_new_or_delete): Constify parameter.

gcc/testsuite/ChangeLog:

* g++.dg/ipa/devirt-24.C: Update template.

4 years agomiddle-end: guard slp-11b.c testcase on vec_lanes
Tamar Christina [Thu, 5 Nov 2020 16:59:30 +0000 (16:59 +0000)]
middle-end: guard slp-11b.c testcase on vec_lanes

They say third time is the charm.. It looks like the testcase
disables the cost model and so AArch64 we end up being able to
do the permute but on x86 we can't.  However when analyzing the
testcase I didn't disable the cost model hence the difference.

So I now guard the testcase on vect_load_lanes as there's not a
"can do any permute" test directive and load lanes is what I will
be fixing up next year so this should catch it.

gcc/testsuite/ChangeLog:

* gcc.dg/vect/slp-11b.c: Guard statements.

4 years agoDrop overflow from constants while building ranges in ranger.
Aldy Hernandez [Thu, 5 Nov 2020 11:40:51 +0000 (12:40 +0100)]
Drop overflow from constants while building ranges in ranger.

Sometimes the overflow flag will leak into the IL.  Drop it while
creating ranges.

There are various places we could plug this.  This patch just plugs things
at get_tree_range which is the entry point for ranges from tree expressions.
It fixes the PR, and probably fixes the ranger entirely, but we may need
to revisit this.

For example, I looked to see if there were other places that created
ranges with TREE_OVERFLOW set, and there are various.  For example,
the following code pattern appears multiple times in vr-values.c:

  else if (is_gimple_min_invariant (op0))
    vr0.set (op0);

This can pick up TREE_OVERFLOW from the IL if present.  However, the
ranger won't see them so we're good.

At some point we should audit all this.  Or perhaps just nuke all
TREE_OVERFLOW's at irange::set.

For now, this will do.

gcc/ChangeLog:

PR tree-optimization/97721
* gimple-range.cc (get_tree_range): Drop overflow from constants.

gcc/testsuite/ChangeLog:

* gcc.dg/pr97721.c: New test.

4 years agodiagnostic paths: loosen coupling between path-printing and path_summary
David Malcolm [Thu, 5 Nov 2020 15:00:17 +0000 (10:00 -0500)]
diagnostic paths: loosen coupling between path-printing and path_summary

Doing this makes followup work to add HTML path-printing cleaner.

gcc/ChangeLog:
* tree-diagnostic-path.cc (struct path_summary::event_range): Move
out of path_summary to...
(struct event_range): ...here.
(class path_summary): Convert to...
(struct path_summary): ...this.
(path_summary::m_ranges): Drop "private".
(path_summary::print): Convert to...
(print_path_summary_as_text): ...this, passing in the path_summary
explicitly.
(default_tree_diagnostic_path_printer): Update for above change.
(selftest::test_empty_path): Likewise.
(selftest::test_intraprocedural_path): Likewise.
(selftest::test_interprocedural_path_1): Likewise.
(selftest::test_interprocedural_path_2): Likewise.
(selftest::test_recursion): Likewise.

4 years agoi386: Fix PR97715
qing zhao [Thu, 5 Nov 2020 14:57:46 +0000 (15:57 +0100)]
i386: Fix PR97715

This change fixes a bug in the i386 backend when adding
-fzero-call-used-regs=all on a target that has no x87
registers.

When there is no x87 registers available, we should not
zero stack registers.

gcc/ChangeLog:

PR target/97715
* config/i386/i386.c (zero_all_st_registers): Return
earlier when the FPU is disabled.

gcc/testsuite/ChangeLog:

PR target/97715
* gcc.target/i386/zero-scratch-regs-32.c: New test.

4 years agoanalyzer: fix ICE comparing COMPLEX_CSTs [PR97668]
David Malcolm [Thu, 5 Nov 2020 14:54:58 +0000 (09:54 -0500)]
analyzer: fix ICE comparing COMPLEX_CSTs [PR97668]

gcc/analyzer/ChangeLog:
PR analyzer/97668
* svalue.cc (cmp_cst): Handle COMPLEX_CST.

gcc/testsuite/ChangeLog:
PR analyzer/97668
* gcc.dg/analyzer/pr97668.c: New test.
* gfortran.dg/analyzer/pr97668.f: New test.

4 years agoFix uninitialized memory use in ipa-modref
Jan Hubicka [Thu, 5 Nov 2020 14:25:14 +0000 (15:25 +0100)]
Fix uninitialized memory use in ipa-modref

* ipa-modref.c (parm_map_for_arg): Initialize parm_offset and
parm_offset_knonw.
(read_section): Set writes_errno to false.

4 years agolibstdc++: Fix new <sstream> constructors
Jonathan Wakely [Thu, 5 Nov 2020 12:16:13 +0000 (12:16 +0000)]
libstdc++: Fix new <sstream> constructors

- Add a missing 'explicit' to a basic_stringbuf constructor.
- Set up the get/put area pointers in the constructor from strings using
  different allocator types.
- Remove public basic_stringbuf::__sv_type alias.
- Do not construct temporary basic_string objects with a
  default-constructed allocator.

Also, change which basic_string constructor is used, as a minor
compile-time optimization. Constructing from a basic_string_view
requires more work from the compiler, so just use a pointer and length.

libstdc++-v3/ChangeLog:

* include/std/sstream (basic_stringbuf(const allocator_type&):
Add explicit.
(basic_stringbuf(const basic_string<C,T,SA>&, openmode, const A&)):
Call _M_stringbuf_init. Construct _M_string from pointer and length
to avoid constraint checks for string view.
(basic_stringbuf::view()): Make __sv_type alias local to the
function.
(basic_istringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Pass string to _M_streambuf instead of constructing a temporary
with the wrong allocator.
(basic_ostringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Likewise.
(basic_stringstream(const basic_string<C,T,SA>&, openmode, const A&)):
Likewise.
* src/c++20/sstream-inst.cc: Use string_view and wstring_view
typedefs in explicit instantiations.
* testsuite/27_io/basic_istringstream/cons/char/1.cc: Add more
tests for constructors.
* testsuite/27_io/basic_ostringstream/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/char/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/char/2.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/1.cc: Likewise.
* testsuite/27_io/basic_stringbuf/cons/wchar_t/2.cc: Likewise.
* testsuite/27_io/basic_stringstream/cons/char/1.cc: Likewise.

4 years agolibstdc++: Adjust whitespace in <sstream>
Jonathan Wakely [Wed, 4 Nov 2020 23:55:54 +0000 (23:55 +0000)]
libstdc++: Adjust whitespace in <sstream>

libstdc++-v3/ChangeLog:

* include/std/sstream: Adjust whitespace.

4 years agoFix SLP vectorization of stores from boolean vectors
Richard Biener [Thu, 5 Nov 2020 09:16:53 +0000 (10:16 +0100)]
Fix SLP vectorization of stores from boolean vectors

The following fixes SLP vectorization of stores that were
pattern recognized.  Since in SLP vectorization pattern analysis
happens after dataref group analysis we have to adjust the groups
with the pattern stmts.  This has some effects down the pipeline
and exposes cases where we looked at the wrong pattern/non-pattern
stmts.

2020-11-05  Richard Biener  <rguenther@suse.de>

* tree-vect-data-refs.c (vect_slp_analyze_node_dependences):
Use the original stmts.
(vect_slp_analyze_node_alignment): Use the pattern stmt.
* tree-vect-slp.c (vect_fixup_store_groups_with_patterns):
New function.
(vect_slp_analyze_bb_1): Call it.

* gcc.dg/vect/bb-slp-69.c: New testcase.

4 years agomiddle-end: optimize slp simplify back to back permutes.
Tamar Christina [Thu, 5 Nov 2020 11:46:35 +0000 (11:46 +0000)]
middle-end: optimize slp simplify back to back permutes.

This optimizes sequential permutes. i.e. if there are two permutes back to back
this function applies the permute of the parent to the child and removed the
parent.

This relies on the materialization point calculation in optimize SLP.

This allows us to remove useless permutes such as

ldr     q0, [x0, x3]
ldr     q2, [x1, x3]
trn1    v1.4s, v0.4s, v0.4s
trn2    v0.4s, v0.4s, v0.4s
trn1    v0.4s, v1.4s, v0.4s
mov     v1.16b, v3.16b
fcmla   v1.4s, v0.4s, v2.4s, #0
fcmla   v1.4s, v0.4s, v2.4s, #90
str     q1, [x2, x3]

from the sequence the vectorizer puts out and give

ldr     q0, [x0, x3]
ldr     q2, [x1, x3]
mov     v1.16b, v3.16b
fcmla   v1.4s, v0.4s, v2.4s, #0
fcmla   v1.4s, v0.4s, v2.4s, #90
str     q1, [x2, x3]

instead.

gcc/ChangeLog:

* tree-vect-slp.c (vect_slp_tree_permute_noop_p): New.
(vect_optimize_slp): Optimize permutes.
(vectorizable_slp_permutation): Fix typo.

4 years agotestsuite: disable vect tests that was accidentally enabled on x86
Tamar Christina [Thu, 5 Nov 2020 10:14:17 +0000 (10:14 +0000)]
testsuite: disable vect tests that was accidentally enabled on x86

My previous patch accidentally enabled some tests on x86 because my target
selector foo was weak..  This now properly only runs them on AArch64.

gcc/testsuite/ChangeLog:

* gcc.dg/vect/slp-11b.c: Update testcase.
* gcc.dg/vect/slp-perm-6.c: Update target selector.

4 years agodebug/97718 - fix abstract origin references after last change
Richard Biener [Thu, 5 Nov 2020 08:27:28 +0000 (09:27 +0100)]
debug/97718 - fix abstract origin references after last change

The change to clear the external_die_map slot after creating
the concrete instance DIE broke abstract origin processing which
tried to make sure to have those point to the early abstract instance
and not the concrete instance.  The following restores this by
eventually following the abstract origin link in the concrete instance.

2020-11-05  Richard Biener  <rguenther@suse.de>

PR debug/97718
* dwarf2out.c (add_abstract_origin_attribute): Make sure to
point to the abstract instance.

4 years agomiddle-end: Store and use the SLP instance kind when aborting load/store lanes
Tamar Christina [Thu, 5 Nov 2020 09:02:29 +0000 (09:02 +0000)]
middle-end: Store and use the SLP instance kind when aborting load/store lanes

This patch stores the SLP instance kind in the SLP instance so that we can use
it later when detecting load/store lanes support.

This also changes the load/store lane support check to only check if the SLP
kind is a store.  This means that in order for the load/lanes to work all
instances must be of kind store.

gcc/ChangeLog:

* tree-vect-loop.c (vect_analyze_loop_2): Check kind.
* tree-vect-slp.c (vect_build_slp_instance): New.
(enum slp_instance_kind): Move to...
* tree-vectorizer.h (enum slp_instance_kind): .. Here
(SLP_INSTANCE_KIND): New.

4 years agors6000: Use direct move for char/short vector CTOR [PR96933]
Kewen Lin [Thu, 5 Nov 2020 06:04:10 +0000 (00:04 -0600)]
rs6000: Use direct move for char/short vector CTOR [PR96933]

This patch is to make vector CTOR with char/short leverage direct
move instructions when they are available.  With one constructed
test case, it can speed up 145% for char and 190% for short on P9.

Tested SPEC2017 x264_r at -Ofast on P9, it gets 1.61% speedup
(but based on unexpected SLP see PR96789).

Bootstrapped/regtested on powerpc64{,le}-linux-gnu P8 and
powerpc64le-linux-gnu P9.

gcc/ChangeLog:

PR target/96933
* config/rs6000/rs6000.c (rs6000_expand_vector_init): Use direct move
instructions for vector construction with char/short types.
* config/rs6000/rs6000.md (p8_mtvsrwz_v16qisi2): New define_insn.
(p8_mtvsrd_v16qidi2): Likewise.

gcc/testsuite/ChangeLog:

PR target/96933
* gcc.target/powerpc/pr96933-1.c: New test.
* gcc.target/powerpc/pr96933-2.c: New test.
* gcc.target/powerpc/pr96933-3.c: New test.
* gcc.target/powerpc/pr96933-4.c: New test.
* gcc.target/powerpc/pr96933.h: New test.
* gcc.target/powerpc/pr96933-run.h: New test.

4 years agoDaily bump.
GCC Administrator [Thu, 5 Nov 2020 00:16:36 +0000 (00:16 +0000)]
Daily bump.

4 years agolibstdc++: Fix default mode of new basic_stringstream constructor [PR 97719]
Jonathan Wakely [Wed, 4 Nov 2020 21:44:05 +0000 (21:44 +0000)]
libstdc++: Fix default mode of new basic_stringstream constructor [PR 97719]

libstdc++-v3/ChangeLog:

PR libstdc++/97719
* include/std/sstream (basic_stringstream(string_type&&, openmode)):
Fix default argument.
* testsuite/27_io/basic_stringstream/cons/char/97719.cc: New test.

4 years agomiddle-end: Move load/store-lanes check till late.
Tamar Christina [Wed, 4 Nov 2020 22:33:11 +0000 (22:33 +0000)]
middle-end: Move load/store-lanes check till late.

This moves the code that checks for load/store lanes further in the pipeline and
places it after slp_optimize.  This would allow us to perform optimizations on
the SLP tree and only bail out if we really have a permute.

With this change it allows us to handle permutes such as {1,1,1,1} which should
be handled by a load and replicate.

This change however makes it all or nothing. Either all instances can be handled
or none at all.  This is why some of the test cases have been adjusted.

gcc/ChangeLog:

* tree-vect-slp.c (vect_analyze_slp_instance): Moved load/store lanes
check to ...
* tree-vect-loop.c (vect_analyze_loop_2): ..Here

gcc/testsuite/ChangeLog:

* gcc.dg/vect/slp-11b.c: Update output scan.
* gcc.dg/vect/slp-perm-6.c: Likewise.

4 years agoIBM Z: Unhardcode NR_C_MODES
Ilya Leoshkevich [Wed, 21 Oct 2020 11:48:07 +0000 (13:48 +0200)]
IBM Z: Unhardcode NR_C_MODES

gcc/ChangeLog:

2020-11-03  Ilya Leoshkevich  <iii@linux.ibm.com>

* config/s390/s390.c (NR_C_MODES): Unhardcode.
(s390_alloc_pool): Use size_t for iterating from 0 to
NR_C_MODES.
(s390_add_constant): Likewise.
(s390_find_constant): Likewise.
(s390_dump_pool): Likewise.
(s390_free_pool): Likewise.

4 years agoIBM Z: Remove unused RRe and RXe mode_attrs
Ilya Leoshkevich [Wed, 21 Oct 2020 11:46:04 +0000 (13:46 +0200)]
IBM Z: Remove unused RRe and RXe mode_attrs

gcc/ChangeLog:

2020-11-03  Ilya Leoshkevich  <iii@linux.ibm.com>

* config/s390/s390.md (RRe): Remove.
(RXe): Remove.

4 years agogo: disable -fipa-icf-functions by default in Go frontend
Ian Lance Taylor [Wed, 4 Nov 2020 20:02:31 +0000 (12:02 -0800)]
go: disable -fipa-icf-functions by default in Go frontend

Go programs expect to be able to get reliable backtrace information
with correct file/line information, but -fipa-icf-functions breaks
that because it merges together distinct functions which should have
distinct file/line info.

* go-lang.c (go_langhook_post_options): Disable
-fipa-icf-functions if it was not explicitly enabled.

4 years agoAdd Ranger temporal cache
Andrew MacLeod [Wed, 4 Nov 2020 17:59:15 +0000 (12:59 -0500)]
Add Ranger temporal cache

Add a timestamp to supplement the global range cache to detect when a value
may become stale.

gcc/
PR tree-optimization/97515
* gimple-range-cache.h (class ranger_cache): New prototypes plus
temporal cache pointer.
* gimple-range-cache.cc (struct range_timestamp): New.
(class temporal_cache): New.
(temporal_cache::temporal_cache): New.
(temporal_cache::~temporal_cache): New.
(temporal_cache::get_timestamp): New.
(temporal_cache::set_dependency): New.
(temporal_cache::temporal_value): New.
(temporal_cache::current_p): New.
(temporal_cache::set_timestamp): New.
(temporal_cache::set_always_current): New.
(ranger_cache::ranger_cache): Allocate the temporal cache.
(ranger_cache::~ranger_cache): Free temporal cache.
(ranger_cache::get_non_stale_global_range): New.
(ranger_cache::set_global_range): Add a timestamp.
(ranger_cache::register_dependency): New.  Add timestamp dependency.
* gimple-range.cc (gimple_ranger::range_of_range_op): Add operand
dependencies.
(gimple_ranger::range_of_phi): Ditto.
(gimple_ranger::range_of_stmt): Check if global range is stale, and
recalculate if so.
gcc/testsuite/
* gcc.dg/pr97515.c: Check listing for folding of entire function.

4 years agolibstdc++: Fix test failure with --disable-linux-futex
Jonathan Wakely [Wed, 4 Nov 2020 15:24:47 +0000 (15:24 +0000)]
libstdc++: Fix test failure with --disable-linux-futex

As noted in PR 96817 this new test fails if the library is built without
futexes. That's expected of course, but we might as well fail more
obviously than a deadlock that eventually times out.

libstdc++-v3/ChangeLog:

* testsuite/18_support/96817.cc: Fail fail if the library is
configured to not use futexes.

4 years agolibstdc++: Define new C++17 std::search overload for Parallel Mode [PR 94971]
Jonathan Wakely [Wed, 4 Nov 2020 13:36:32 +0000 (13:36 +0000)]
libstdc++: Define new C++17 std::search overload for Parallel Mode [PR 94971]

libstdc++-v3/ChangeLog:

PR libstdc++/94971
* include/bits/stl_algo.h (search(FIter, FIter, const Searcher):
Adjust #if condition.
* include/parallel/algo.h (search(FIter, FIter, const Searcher&):
Define new overload for C++17.

4 years agotarghooks.c: Fix -fzero-call-used-regs 'sorry' typo
Tobias Burnus [Wed, 4 Nov 2020 13:31:34 +0000 (14:31 +0100)]
targhooks.c: Fix -fzero-call-used-regs 'sorry' typo

gcc/ChangeLog:

* targhooks.c (default_zero_call_used_regs): Fix flag-name typo
in sorry.

4 years agolibstdc++: Document istreambuf_iterator base class change [PR 92285]
Jonathan Wakely [Wed, 4 Nov 2020 12:45:32 +0000 (12:45 +0000)]
libstdc++: Document istreambuf_iterator base class change [PR 92285]

libstdc++-v3/ChangeLog:

PR libstdc++/92285
* doc/xml/manual/evolution.xml: Document change to base class.
* doc/html/manual/api.html: Regenerate.

4 years agoadd costing to SLP vectorized PHIs
Richard Biener [Wed, 4 Nov 2020 10:37:52 +0000 (11:37 +0100)]
add costing to SLP vectorized PHIs

I forgot to cost vectorized PHIs.  Scalar PHIs are just costed
as scalar_stmt so the following costs vector PHIs as vector_stmt.

2020-11-04  Richard Biener  <rguenther@suse.de>

* tree-vectorizer.h (vectorizable_phi): Adjust prototype.
* tree-vect-stmts.c (vect_transform_stmt): Adjust.
(vect_analyze_stmt): Pass cost_vec to vectorizable_phi.
* tree-vect-loop.c (vectorizable_phi): Do costing.

4 years agotree-optimization/97709 - set abnormal flag when vectorizing live lanes
Richard Biener [Wed, 4 Nov 2020 10:20:17 +0000 (11:20 +0100)]
tree-optimization/97709 - set abnormal flag when vectorizing live lanes

This properly sets the abnormal flag when vectorizing live lanes
when the original scalar was live across an abnormal edge.

2020-11-04  Richard Biener  <rguenther@suse.de>

PR tree-optimization/97709
* tree-vect-loop.c (vectorizable_live_operation): Set
SSA_NAME_OCCURS_IN_ABNORMAL_PHI when necessary.

* gcc.dg/vect/bb-slp-pr97709.c: New testcase.

4 years agophiopt: Optimize x ? 1024 : 0 to (int) x << 10 [PR97690]
Jakub Jelinek [Wed, 4 Nov 2020 10:55:29 +0000 (11:55 +0100)]
phiopt: Optimize x ? 1024 : 0 to (int) x << 10 [PR97690]

The following patch generalizes the x ? 1 : 0 -> (int) x optimization
to handle also left shifts by constant.

During x86_64-linux and i686-linux bootstraps + regtests it triggered
in 1514 unique non-LTO -m64 cases (sort -u on log mentioning
filename, function name and shift count) and 1866 -m32 cases.

Unfortunately, the patch regresses (before the tests have been adjusted):
+FAIL: gcc.dg/tree-ssa/ssa-ccp-11.c scan-tree-dump-times optimized "if " 0
+FAIL: gcc.dg/vect/bb-slp-pattern-2.c -flto -ffat-lto-objects  scan-tree-dump-times slp1 "optimized: basic block" 1
+FAIL: gcc.dg/vect/bb-slp-pattern-2.c scan-tree-dump-times slp1 "optimized: basic block" 1
and in both cases it actually results in worse code.

> > We'd need some optimization that would go through all PHI edges and
> > compute if some use of the phi results don't actually compute a constant
> > across all the PHI edges - 1 & 0 and 0 & 1 is always 0.

> PRE should do this, IMHO only optimizing it at -O2 is fine.

> > Similarly, in the slp vectorization test there is:
> >      a[0] = b[0] ? 1 : 7;

> note this, carefully avoiding the already "optimized" b[0] ? 1 : 0 ...

> So the option is to put : 7 in the 2, 4 an 8 case as well.  The testcase
> wasn't added for any real-world case but is artificial I guess for
> COND_EXPR handling of invariants.

> But yeah, for things like SLP it means we eventually have to
> implement reverse transforms for all of this to make the lanes
> matching.  But that's true anyway for things like x + 1 vs. x + 0
> or x / 3 vs. x / 2 or other simplifications we do.

2020-11-04  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/97690
* tree-ssa-phiopt.c (conditional_replacement): Also optimize
cond ? pow2p_cst : 0 as ((type) cond) << cst.

* gcc.dg/tree-ssa/phi-opt-22.c: New test.
* gcc.dg/tree-ssa/ssa-ccp-11.c: Use -O2 instead of -O1.
* gcc.dg/vect/bb-slp-pattern-2.c (foo): Use ? 2 : 7, ? 4 : 7 and
? 8 : 7 instead of ? 2 : 0, ? 4 : 0, ? 8 : 0.

4 years agolibstdc++: Fix constant expressions in std::uniform_int_distribution
Jonathan Wakely [Wed, 4 Nov 2020 10:36:45 +0000 (10:36 +0000)]
libstdc++: Fix constant expressions in std::uniform_int_distribution

Clang and EDG say the class member access expressions __urng.min() and
__urng.max() are not constant expressions, because the object expression
__urng is not usable in a constant expresion. Use a qualified-id to call
those static member functions instead.

Co-authored-by: Stephan Bergmann <sbergman@redhat.com>
libstdc++-v3/ChangeLog:

* include/bits/uniform_int_dist.h (uniform_int_distribution::_S_nd):
Use qualified-id to refer to static member functions.

4 years agogcc-changelog: Change parse_git_revisions strict argument to True.
Martin Liska [Wed, 4 Nov 2020 09:57:28 +0000 (10:57 +0100)]
gcc-changelog: Change parse_git_revisions strict argument to True.

Change the default that is used by GIT server hook and also
by git_update_version.py. Both should use True now.

contrib/ChangeLog:

* gcc-changelog/git_repository.py: Set strict=True
for parse_git_revisions as a default.

4 years agoRe-instantiate SLP induction IV CSE
Richard Biener [Wed, 4 Nov 2020 08:41:48 +0000 (09:41 +0100)]
Re-instantiate SLP induction IV CSE

This re-instantiates the previously removed CSE, fixing the
FAIL of gcc.dg/vect/costmodel/x86_64/costmodel-pr30843.c
It turns out the previous approach still works.

2020-11-04  Richard Biener  <rguenther@suse.de>

* tree-vect-loop.c (vectorizable_induction): Re-instantiate
previously removed CSE of SLP IVs.

4 years agotestsuite: fix arm/pure-code/no-literal-pool-* tests
Christophe Lyon [Wed, 4 Nov 2020 09:33:42 +0000 (09:33 +0000)]
testsuite: fix arm/pure-code/no-literal-pool-* tests

Add -mfloat-abi=soft and skip the tests if -mfloat-abi=hard is
supplied.

This avoids failures when testing with overridden flags such as
mthumb/-mcpu=cortex-m4/-mfloat-abi=hard

2020-11-04  Christophe Lyon  <christophe.lyon@linaro.org>

gcc/testsuite/
* gcc.target/arm/pure-code/no-literal-pool-m0.c: Add dg-skip-if
and -mfloat-abi=soft option.
* gcc.target/arm/pure-code/no-literal-pool-m23.c: Likewise.

4 years agogcc-changelog/git_commit.py: Check for missing description
Tobias Burnus [Wed, 4 Nov 2020 09:35:54 +0000 (10:35 +0100)]
gcc-changelog/git_commit.py: Check for missing description

Especially when using mklog.py, it is simply to forget to fill in
the entries after the '\t* file.c (section):' or '\t(section):'.

contrib/ChangeLog:

* gcc-changelog/git_commit.py (item_parenthesis_empty_regex,
item_parenthesis_regex): Add.
(check_for_empty_description): Use them.
* gcc-changelog/test_email.py (test_emptry_entry_desc,
test_emptry_entry_desc_2): Add.
* gcc-changelog/test_patches.txt: Add two testcases for it.

4 years agoi386: Fix Intel MCU psABI comment w.r.t DEFAULT_PCC_STRUCT_RETURN
Uros Bizjak [Wed, 4 Nov 2020 08:59:39 +0000 (09:59 +0100)]
i386: Fix Intel MCU psABI comment w.r.t DEFAULT_PCC_STRUCT_RETURN

2020-11-04  Uroš Bizjak  <ubizjak@gmail.com>

gcc/

* config/i386/i386-options.c (ix86_recompute_optlev_based_flags):
Fix Intel MCU psABI comment w.r.t DEFAULT_PCC_STRUCT_RETURN.

4 years agoopenmp: allocate clause vs. *reduction array sections [PR97670]
Jakub Jelinek [Wed, 4 Nov 2020 08:37:22 +0000 (09:37 +0100)]
openmp: allocate clause vs. *reduction array sections [PR97670]

This patch finds the base expression of reduction array sections and uses it
in checks whether allocate clause lists only variables that have been privatized.
Also fixes a pasto that caused an ICE.

2020-11-04  Jakub Jelinek  <jakub@redhat.com>

PR c++/97670
gcc/c-family/
* c-omp.c (c_omp_split_clauses): Look through array reductions to find
underlying decl to clear in the allocate_head bitmap.
gcc/c/
* c-typeck.c (c_finish_omp_clauses): Look through array reductions to
find underlying decl to clear in the aligned_head bitmap.
gcc/cp/
* semantics.c (finish_omp_clauses): Look through array reductions to
find underlying decl to clear in the aligned_head bitmap.  Use
DECL_UID (t) instead of DECL_UID (OMP_CLAUSE_DECL (c)) when clearing
in the bitmap.  Only diagnose errors about allocate vars not being
privatized on the same construct on allocate clause if it has
a DECL_P OMP_CLAUSE_DECL.
gcc/testsuite/
* c-c++-common/gomp/allocate-4.c: New test.
* g++.dg/gomp/allocate-2.C: New test.
* g++.dg/gomp/allocate-3.C: New test.

4 years agoFix duplicate ChangeLog entries.
Martin Liska [Wed, 4 Nov 2020 08:42:27 +0000 (09:42 +0100)]
Fix duplicate ChangeLog entries.

4 years agobootstrap/97666 - really fix sizeof (bool) issue
Richard Biener [Wed, 4 Nov 2020 08:36:05 +0000 (09:36 +0100)]
bootstrap/97666 - really fix sizeof (bool) issue

Pastoed the previous fix too quickly, the following fixes the
correct spot - the memset, not the allocation.

2020-11-04  Richard Biener  <rguenther@suse.de>

PR bootstrap/97666
* tree-vect-slp.c (vect_build_slp_tree_2): Revert previous
fix and instead adjust the memset.

4 years agoi386: Cleanup i386/i386elf.h and align it's return convention with the SVR4 ABI
Pat Bernardi [Wed, 4 Nov 2020 08:12:13 +0000 (09:12 +0100)]
i386: Cleanup i386/i386elf.h and align it's return convention with the SVR4 ABI

While i386elf.h was originally derived from sysv4.h it has not been kept
up to date with the development of the compiler. Two changes are made:

* The return convention now follows the i386 and x86_64 SVR4 ABIs again.

* The more efficient default version of ASM_OUTPUT_ASCII in elfos.h is used.

2020-11-04  Pat Bernardi  <bernardi@adacore.com>

gcc/ChangeLog

* config/i386/i386elf.h (SUBTARGET_RETURN_IN_MEMORY): Remove.
(ASM_OUTPUT_ASCII): Likewise.
(DEFAULT_PCC_STRUCT_RETURN): Define.
* config/i386/i386.c (ix86_return_in_memory): Remove
SUBTARGET_RETURN_IN_MEMORY.

4 years agoObjective-C++ : Fix ICE in potential_constant_expression_1.
Iain Sandoe [Sat, 31 Oct 2020 09:25:47 +0000 (09:25 +0000)]
Objective-C++ : Fix ICE in potential_constant_expression_1.

We cannot, as things stand, handle Objective-C tree codes in
the switch and deal with this by calling out to a function that
has a dummy version when Objective-C is not enabled.

Because of the way the logic works (with a fall through to a
'sorry' in case of unhandled expressions), the function reports
cases that are known to be unsuitable for constant exprs. The
dummy function always reports 'false' and thus will fall through
to the 'sorry'.

gcc/c-family/ChangeLog:

* c-objc.h (objc_non_constant_expr_p): New.
* stub-objc.c (objc_non_constant_expr_p): New.

gcc/cp/ChangeLog:

* constexpr.c (potential_constant_expression_1): Handle
expressions known to be non-constant for Objective-C.

gcc/objc/ChangeLog:

* objc-act.c (objc_non_constant_expr_p): New.

4 years agoc: Implement C2x nodiscard attribute
Joseph Myers [Wed, 4 Nov 2020 06:48:46 +0000 (06:48 +0000)]
c: Implement C2x nodiscard attribute

C2x adds the nodiscard standard attribute, with an optional string
argument, as in C++; implement it for C.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/c/
2020-11-04  Joseph Myers  <joseph@codesourcery.com>

* c-decl.c (handle_nodiscard_attribute): New.
(std_attribute_table): Add nodiscard.
* c-parser.c (c_parser_std_attribute): Expect argument to
nodiscard attribute to be a string.  Do not special-case ignoring
nodiscard.
* c-typeck.c (maybe_warn_nodiscard): New.
(build_compound_expr, emit_side_effect_warnings): Call
maybe_warn_nodiscard.
(c_process_expr_stmt, c_finish_stmt_expr): Also call
emit_side_effect_warnings if warn_unused_result.

gcc/testsuite/
2020-11-04  Joseph Myers  <joseph@codesourcery.com>

* gcc.dg/c2x-attr-nodiscard-1.c, gcc.dg/c2x-attr-nodiscard-2.c,
gcc.dg/c2x-attr-nodiscard-3.c, gcc.dg/c2x-attr-nodiscard-4.c: New
tests.
* gcc.dg/c2x-attr-syntax-5.c: Remove nodiscard test.

4 years agoDon't extract memory from operand for normal memory constraint.
liuhongt [Mon, 26 Oct 2020 12:46:42 +0000 (20:46 +0800)]
Don't extract memory from operand for normal memory constraint.

gcc/ChangeLog
PR target/97540
* ira.c: (ira_setup_alts): Extract memory from operand only
for special memory constraint.
* recog.c (asm_operand_ok): Ditto.
* lra-constraints.c (process_alt_operands): MEM_P is
required for normal memory constraint.

gcc/testsuite/ChangeLog
* gcc.target/i386/pr97540.c: New test.

4 years agoFix invalid address for special_memory_constraint.
liuhongt [Mon, 26 Oct 2020 12:45:23 +0000 (20:45 +0800)]
Fix invalid address for special_memory_constraint.

gcc/ChangeLog
PR target/97532
* lra-constraints.c (valid_address_p): Handle operand of
special memory constraint.
(process_address_1): Ditto.

4 years agoDaily bump.
GCC Administrator [Wed, 4 Nov 2020 00:16:41 +0000 (00:16 +0000)]
Daily bump.

4 years agoAdd testcase for pr97695
Jan Hubicka [Tue, 3 Nov 2020 23:21:40 +0000 (00:21 +0100)]
Add testcase for pr97695

* gcc.c-torture/execute/pr97695.c: New test.

4 years agoFix copying of clone_info while reshaping clone tree.
Jan Hubicka [Tue, 3 Nov 2020 23:19:59 +0000 (00:19 +0100)]
Fix copying of clone_info while reshaping clone tree.

2020-11-04  Jan Hubicka  <hubicka@ucw.cz>

PR ipa/97695
* cgraph.c (cgraph_edge::redirect_call_stmt_to_callee): Fix ICE with
in dumping code.
(cgraph_node::remove): Save clone info before releasing it and pass it
to unregister.
* cgraph.h (symtab_node::unregister): Add clone_info parameter.
(cgraph_clone::unregister): Likewise.
* cgraphclones.c (cgraph_node::find_replacement): Copy clone info
* symtab-clones.cc (clone_infos_t::duplicate): Remove.
(clone_info::get_create): Simplify.
* symtab.c (symtab_node::unregister): Pass around clone info.
* varpool.c (varpool_node::remove): Update.

4 years agoc++: Not all character types are byte-access types.
Jason Merrill [Thu, 29 Oct 2020 20:50:57 +0000 (16:50 -0400)]
c++: Not all character types are byte-access types.

The patch for 94923 that introduced is_byte_access_type wrongly changed
build_cplus_array_type to treat even arrays of char16_t as typeless storage,
which is wrong; only arrays of char and unsigned char have the special alias
semantics in C++.

G++ used to treat signed char the same way, as C does, but C++ has always
omitted it.

gcc/cp/ChangeLog:

* tree.c (is_byte_access_type): Don't use char_type_p.

gcc/testsuite/ChangeLog:

* g++.dg/Wclass-memaccess.C: Check that signed char and
char16_t aren't treated as byte-access types.

4 years agolibstdc++: Ensure std::lock_guard is declared
Jonathan Wakely [Tue, 3 Nov 2020 21:56:44 +0000 (21:56 +0000)]
libstdc++: Ensure std::lock_guard is declared

libstdc++-v3/ChangeLog:

* include/std/syncstream: Include <bits/std_mutex.h>
unconditionally.

4 years ago[OpenACC] Use proper location to 'inform' of enclosing parent compute construct
Thomas Schwinge [Tue, 3 Nov 2020 21:06:29 +0000 (22:06 +0100)]
[OpenACC] Use proper location to 'inform' of enclosing parent compute construct

Bug fix for recent commit beddd1762ad2bbe84dd776c54489153f83f21e56 "[OpenACC]
More precise diagnostics for 'gang', 'worker', 'vector' clauses with arguments
on 'loop' only allowed in 'kernels' regions":

> [...], and 'inform' at the location of the enclosing parent
> compute construct/[...].

Now really.

gcc/
* omp-low.c (scan_omp_for) <OpenACC>: Use proper location to
'inform' of enclosing parent compute construct.
gcc/testsuite/
* c-c++-common/goacc/pr92793-1.c: Extend.
* gfortran.dg/goacc/pr92793-1.f90: Likewise.

4 years agolibstdc++: Add mising gnu-versioned-namespace symbols
François Dumont [Sat, 31 Oct 2020 16:46:56 +0000 (17:46 +0100)]
libstdc++: Add mising gnu-versioned-namespace symbols

libstdc++-v3/ChangeLog:

* config/abi/pre/gnu-versioned-namespace.ver:
Add __istream_extract and _Safe_local_iterator_base::_M_attach_single
symbols.

4 years agoc++: Don't try to parse a function declaration as deduction guide [PR97663]
Jakub Jelinek [Tue, 3 Nov 2020 20:42:51 +0000 (21:42 +0100)]
c++: Don't try to parse a function declaration as deduction guide [PR97663]

While these function declarations have NULL decl_specifiers->type,
they have still type specifiers specified from which the default int
in the return type is added, so we shouldn't try to parse those as
deduction guides.

2020-11-03  Jakub Jelinek  <jakub@redhat.com>

PR c++/97663
* parser.c (cp_parser_init_declarator): Don't try to parse
C++17 deduction guides if there are any type specifiers even when
type is NULL.

* g++.dg/cpp1z/class-deduction75.C: New test.

4 years agolibstdc++: Refactor std::call_once internals
Jonathan Wakely [Tue, 3 Nov 2020 19:42:07 +0000 (19:42 +0000)]
libstdc++: Refactor std::call_once internals

This separates the definition of std::__call_proxy into two funcions,
one for TLS and one for non-TLS, to make them easier to read. It also
replaces the __get_once_functor_lock_ptr() internal helper with a new
set_lock_ptr(unique_lock<mutex>*) function so that __once_proxy doesn't
need to call it twice.

libstdc++-v3/ChangeLog:

* src/c++11/mutex.cc [_GLIBCXX_HAVE_TLS] (__once_proxy): Define
separately for TLS targets.
[!_GLIBCXX_HAVE_TLS] (__get_once_functor_lock_ptr): Replace with ...
(set_lock_ptr): ... this. Set new value and return previous
value.
[!_GLIBCXX_HAVE_TLS] (__set_once_functor_lock_ptr): Adjust to
use set_lock_ptr.
[!_GLIBCXX_HAVE_TLS] (__once_proxy): Likewise.

4 years agoc++: DR2303, ambiguous base deduction [PR97453]
kamlesh kumar [Mon, 2 Nov 2020 15:10:21 +0000 (20:40 +0530)]
c++: DR2303, ambiguous base deduction [PR97453]

When there are two possible matches and one is a base of the other, choose
the derived class rather than fail.

gcc/cp/ChangeLog

2020-10-21  Kamlesh Kumar  <kamleshbhalui@gmail.com>
    Jason Merrill  <jason@redhat.com>

PR c++/97453
DR2303
* pt.c (get_template_base): Consider closest base in template
deduction when base of base also matches.

gcc/testsuite/ChangeLog

2020-10-21  Kamlesh Kumar  <kamleshbhalui@gmail.com>

* g++.dg/DRs/dr2303.C: New test.

4 years agoAdd missing non-NULL check in cgraphclones
Jan Hubicka [Tue, 3 Nov 2020 19:31:23 +0000 (20:31 +0100)]
Add missing non-NULL check in cgraphclones

2020-11-03  Jan Hubicka  <hubicka@ucw.cz>

PR ipa/97698
* cgraphclones.c (duplicate_thunk_for_node): Check that info is
non-NULL.

4 years agolibstdc++: Rewrite std::call_once to use futexes [PR 66146]
Jonathan Wakely [Tue, 3 Nov 2020 18:44:32 +0000 (18:44 +0000)]
libstdc++: Rewrite std::call_once to use futexes [PR 66146]

The current implementation of std::call_once uses pthread_once, which
only meets the C++ requirements when compiled with support for
exceptions. For most glibc targets and all non-glibc targets,
pthread_once does not work correctly if the init_routine exits via an
exception. The pthread_once_t object is left in the "active" state, and
any later attempts to run another init_routine will block forever.

This change makes std::call_once work correctly for Linux targets, by
replacing the use of pthread_once with a futex, based on the code from
__cxa_guard_acquire. For both glibc and musl, the Linux implementation
of pthread_once is already based on futexes, and pthread_once_t is just
a typedef for int, so this change does not alter the layout of
std::once_flag. By choosing the values for the int appropriately, the
new code is even ABI compatible. Code that calls the old implementation
of std::call_once will use pthread_once to manipulate the int, while new
code will use the new std::once_flag members to manipulate it, but they
should interoperate correctly. In both cases, the int is initially zero,
has the lowest bit set when there is an active execution, and equals 2
after a successful returning execution. The difference with the new code
is that exceptional exceptions are correctly detected and the int is
reset to zero.

The __cxa_guard_acquire code (and musl's pthread_once) use an additional
state to say there are other threads waiting. This allows the futex wake
syscall to be skipped if there is no contention. Glibc doesn't use a
waiter bit, so we have to unconditionally issue the wake in order to be
compatible with code calling the old std::call_once that uses Glibc's
pthread_once. If we know that we're using musl (and musl's pthread_once
doesn't change) it would be possible to set a waiting state and check
for it in std::once_flag::_M_finish(bool), but this patch doesn't do
that.

This doesn't fix the bug for non-linux targets. A similar approach could
be used for targets where we know the definition of pthread_once_t is a
mutex and an integer. We could make once_flag._M_activate() use
pthread_mutex_lock on the mutex member within the pthread_once_t, and
then only set the integer if the execution finishes, and then unlock the
mutex. That would require careful study of each target's pthread_once
implementation and that work is left for a later date.

This also fixes PR 55394 because pthread_once is no longer needed, and
PR 84323 because the fast path is now just an atomic load.

As a consequence of the new implementation that doesn't use
pthread_once, we can also make std::call_once work for targets with no
gthreads support. The code for the single-threaded implementation
follows the same methods as on Linux, but with no need for atomics or
futexes.

libstdc++-v3/ChangeLog:

PR libstdc++/55394
PR libstdc++/66146
PR libstdc++/84323
* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Add new symbols.
* include/std/mutex [!_GLIBCXX_HAS_GTHREADS] (once_flag): Define
even when gthreads is not supported.
(once_flag::_M_once) [_GLIBCXX_HAVE_LINUX_FUTEX]: Change type
from __gthread_once_t to int.
(once_flag::_M_passive(), once_flag::_M_activate())
(once_flag::_M_finish(bool), once_flag::_Active_execution):
Define new members for futex and non-threaded implementation.
[_GLIBCXX_HAS_GTHREADS] (once_flag::_Prepare_execution): New
RAII helper type.
(call_once): Use new members of once_flag.
* src/c++11/mutex.cc (std::once_flag::_M_activate): Define.
(std::once_flag::_M_finish): Define.
* testsuite/30_threads/call_once/39909.cc: Do not require
gthreads.
* testsuite/30_threads/call_once/49668.cc: Likewise.
* testsuite/30_threads/call_once/60497.cc: Likewise.
* testsuite/30_threads/call_once/call_once1.cc: Likewise.
* testsuite/30_threads/call_once/dr2442.cc: Likewise.
* testsuite/30_threads/call_once/once_flag.cc: Add test for
constexpr constructor.
* testsuite/30_threads/call_once/66146.cc: New test.
* testsuite/30_threads/call_once/constexpr.cc: Removed.
* testsuite/30_threads/once_flag/cons/constexpr.cc: Removed.

4 years agoc++: using-decl instantiation
Nathan Sidwell [Tue, 3 Nov 2020 18:21:20 +0000 (10:21 -0800)]
c++: using-decl instantiation

In streaming using decls I needed to check some assumptions.  This
adds those checks to the instantiation machinery.

gcc/cp/
* pt.c (tsubst_expr): Simplify using decl instantiation, add
asserts.

4 years agoc++: Refactor clone copying
Nathan Sidwell [Tue, 3 Nov 2020 18:15:54 +0000 (10:15 -0800)]
c++: Refactor clone copying

This patch sets copy_fndecl_with_name to always inform
rest_of_decl_compilation that it is not a top-level decl (it's a
member function).  I also refactor build_cdtor_clones to conditionally
do the method vector updating.  That happens to be a better interface
for modules to use.

gcc/cp/
* class.c (copy_fndecl_with_name):  Always not top level.
(build_cdtor_clones): Add update_methods parm, use it to
conditionally update the method vec.  Return void
(clone_cdtor): Adjust.
(clone_constructors_and_destructors): Adjust comment.

4 years agoi386: Fix ix86_function_arg_regno_p to return correct SSE regno for 32bit TARGET_MACHO
Uros Bizjak [Tue, 3 Nov 2020 18:13:57 +0000 (19:13 +0100)]
i386: Fix ix86_function_arg_regno_p to return correct SSE regno for 32bit TARGET_MACHO

Use up to SSE_REGPARM_MAX registers to pass function parameters
for 32bit Mach-O targets.  Also, define X86_32_MMX_REGPARM_MAX
to return 0 for 32bit Mach-O targets.

2020-11-03  Uroš Bizjak  <ubizjak@gmail.com>

gcc/

* config/i386/i386.c (ix86_function_arg_regno_p): Use up to
SSE_REGPARM_MAX registers to pass function parameters
for 32bit Mach-O targets.
* config/i386/i386.h (X86_32_MMX_REGPARM_MAX): New macro.
(MMX_REGPARM_MAX): Use it.

4 years agoc++: Small pt.c cleanups
Nathan Sidwell [Tue, 3 Nov 2020 18:05:04 +0000 (10:05 -0800)]
c++: Small pt.c cleanups

Now I know about VAR_OR_FUNCTION_DECL_P I found a place to use it.
Also positively checking for a function_decl is clearer than
negatively checking for things that are not.

gcc/cp/
* pt.c (primary_template_specialization_p): Use
VAR_OR_FUNCTION_DECL_P.
(tsubst_template_decl): Check for FUNCTION_DECL, not !TYPE && !VAR
for registering a specialization.

4 years agocpplib: EOF in pragmas
Nathan Sidwell [Tue, 3 Nov 2020 17:06:09 +0000 (09:06 -0800)]
cpplib:  EOF in pragmas

This patch moves the generation of PRAGMA_EOF earlier, to when we set
need_line, rather than when we try and get the next line.  It also
prevents peeking past a PRAGMA token.

libcpp/
* lex.c (cpp_peek_token): Do not peek past CPP_PRAGMA.
(_cpp_lex_direct): Handle EOF in pragma when setting need_line,
not when needing a line.

4 years agoAdd dg-require-effective-target fpic to gcc.target/powerpc tests
Olivier Hainque [Tue, 3 Nov 2020 08:58:31 +0000 (08:58 +0000)]
Add dg-require-effective-target fpic to gcc.target/powerpc tests

This helps powerpc-vxworks kernel mode.

2020-11-03  Olivier Hainque  <hainque@adacore.com>

gcc/testsuite/
* gcc.target/powerpc/pr67789.c: Add
dg-require-effective-target fpic.
* gcc.target/powerpc/pr83629.c: Likewise.
* gcc.target/powerpc/pr84112.c: Likewise. Remove
a superflous target test in the dg-do compile
directive while at it.

4 years agoSync the aarch64-vx7r2 libgcc config with that of Linux
Pat Bernardi [Mon, 24 Aug 2020 14:29:32 +0000 (10:29 -0400)]
Sync the aarch64-vx7r2 libgcc config with that of Linux

This adds ${cpu_type}/t-lse and t-slibgcc-libgcc to the tmake_file
list for aarch64-vxworks7* configurations, as the Linux port does.

t-lse is needed by all triplets now anyway and the standard setting
for slibgcc makes sense as we are working on reintroducing PIC support
for RTPs on various targets. The VxWorks7 system environments are leaning
towards more and more similarilties with Linux in general, so the
closer configurations the better.

2020-11-02  Pat Bernardi  <bernardi@adacore.com>

libgcc/
* config.host (aarch64-vxworks7*, tmake_file): Add
${cpu_type}/t-lse and t-slibgcc-libgcc.

Co-authored-by: Olivier Hainque <hainque@adacore.com>
4 years agoaarch64: intrinsics extract half of bf16 vector
Dennis Zhang [Tue, 3 Nov 2020 16:56:02 +0000 (16:56 +0000)]
aarch64: intrinsics extract half of bf16 vector

This patch implements ACLE intrinsics vget_low_bf16 and vget_high_bf16
to extract lower or higher half from a bfloat16x8 vector. The
vget_high_bf16 is done by 'dup' instruction. The vget_low_bf16 is just
to return the lower half of a vector register. Tests include both big-
and little-endian cases.

gcc/ChangeLog:

2020-11-03  Dennis Zhang  <dennis.zhang@arm.com>

* config/aarch64/aarch64-simd-builtins.def (vget_lo_half): New entry.
(vget_hi_half): Likewise.
* config/aarch64/aarch64-simd.md (aarch64_vget_lo_halfv8bf): New entry.
(aarch64_vget_hi_halfv8bf): Likewise.
* config/aarch64/arm_neon.h (vget_low_bf16): New intrinsic.
(vget_high_bf16): Likewise.

gcc/testsuite/ChangeLog

* gcc.target/aarch64/advsimd-intrinsics/bf16_get.c: New test.
* gcc.target/aarch64/advsimd-intrinsics/bf16_get-be.c: New test.

4 years agoc++: Directly fixup deferred eh-specs
Nathan Sidwell [Tue, 3 Nov 2020 16:45:15 +0000 (08:45 -0800)]
c++: Directly fixup deferred eh-specs

eh-specifiers in a class definition are complete-definition contexts,
and we sometimes need to deferr their parsing.  We create a deferred
eh specifier, which can end up persisting in the type system due to
variants being created before the deferred parse.  This causes
problems in modules handling.

This patch adds fixup_deferred_exception_variants, which directly
modifies the variants of such an eh spec once parsed.  As commented,
the general case is quite hard, so it doesn't deal with everything.
But I do catch the cases I encountered (from the std library).

gcc/cp/
* cp-tree.h (fixup_deferred_exception_variants): Declare.
* parser.c (cp_parser_class_specifier_1): Call it when
completing deferred parses rather than creating a variant.
(cp_parser_member_declaration): Move comment from ...
(cp_parser_noexcept_specification_opt): ... here.  Refactor the
deferred parse.
* tree.c (fixup_deferred_exception_variants): New.

4 years agoc++: A couple of template instantiation cleanups
Nathan Sidwell [Tue, 3 Nov 2020 16:39:47 +0000 (08:39 -0800)]
c++: A couple of template instantiation cleanups

I noticed that we were handling lambda extra scope during template
instantiation in a different order to how we handle the non-template
case.  Reordered that for consistency.  Also some more RAII during
template instantiation.

gcc/cp/
* pt.c (tsubst_lambda_expr): Reorder extra-scope handling to match
the non-template case.
(instantiate_body): Move a couple of declarations to their
initializers.

4 years agoc++: Make extern-C mismatch an error
Nathan Sidwell [Tue, 3 Nov 2020 16:35:53 +0000 (08:35 -0800)]
c++: Make extern-C mismatch an error

duplicate_decls was being lenient about extern-c mismatches, allowing
you to have two declarations in the symbol table after emitting an
error.  This resulted in duplicate error messages in modules, when we
find the same problem multiple times.  Let's just not let that happen.

gcc/cp/
* decl.c (duplicate_decls): Return error_mark_node fo extern-c
mismatch.

4 years agocpplib: Fix off-by-one error
Nathan Sidwell [Tue, 3 Nov 2020 16:32:42 +0000 (08:32 -0800)]
cpplib: Fix off-by-one error

I noticed a fencepost error in the preprocessor.  We should be
checking if the next char is at the limit, not the current char (which
can't be, because we're looking at it).

libcpp/
* lex.c (_cpp_clean_line): Fix DOS off-by-one error.