gcc.git
4 years agoDo not call null register_common in emutls
Alexandre Oliva [Mon, 17 Feb 2020 20:08:11 +0000 (17:08 -0300)]
Do not call null register_common in emutls

Thread-local variables with DECL_COMMON trigger an internal compiler
error on targets that use emulated TLS without register_common, when
we attempt to expand a call to the NULL register_common, with
testcases as simple as gcc.dg/tls/emutls-2.c.

The documentation states that, on such targets, common variables would
fall back to explicitly initialized.  This patch rearranges the code
that deals with initialization of common and non-common variables,
complementing code that is already in place to detect
register_common-less targets.

for  gcc/ChangeLog

* tree-emutls.c (new_emutls_decl, emutls_common_1): Complete
handling of register_common-less targets.

for  gcc/testsuite/ChangeLog

* gcc.dg/tls/emutls-3.c: New, combining emutls-2.c and
thr-init-2.c into an execution test with explicitly common
variables.

4 years ago[AArch64] Fix PR93565 testcase for ILP32.
Wilco Dijkstra [Mon, 17 Feb 2020 19:09:40 +0000 (19:09 +0000)]
[AArch64] Fix PR93565 testcase for ILP32.

Fix PR93565 testcase for ILP32.

testsuite/
* gcc.target/aarch64/pr93565.c: Fix test for ilp32.

4 years agolibstdc++: P1964R2 Wording for boolean-testable
Jonathan Wakely [Mon, 17 Feb 2020 18:15:00 +0000 (18:15 +0000)]
libstdc++: P1964R2 Wording for boolean-testable

This removes the complicated std::boolean concept, as agreed in Prague.

* include/bits/ranges_algo.h (__find_fn, __find_first_of_fn)
(__adjacent_find_fn): Cast result of predicate to bool.
* include/std/concepts (__boolean): Remove.
(__detail::__boolean_testable_impl, __detail::__boolean_testable): Add
new helper concepts.
(__detail::__weakly_eq_cmp_with, totally_ordered, totally_ordered_with)
(predicate): Use __boolean_testable instead of boolean.
* libsupc++/compare (__detail::__partially_ordered, _Synth3way):
Likewise.

4 years agolibstdc++: P1970R2 Consistency for size() functions: Add ranges::ssize
Jonathan Wakely [Mon, 17 Feb 2020 17:58:09 +0000 (17:58 +0000)]
libstdc++: P1970R2 Consistency for size() functions: Add ranges::ssize

This defines ranges::ssize as approved in Prague. It's unclear what is
supposed to happen for types for which range_difference_t is not a valid
type. I've assumed they are not meant to be usable with ranges::ssize,
despite being usable with ranges::size.

* include/bits/range_access.h (_SSize, ssize): Define for C++20.
* testsuite/std/ranges/access/ssize.cc: New test.

4 years agolibstdc++ P1956R1 On the names of low-level bit manipulation functions
Jonathan Wakely [Mon, 17 Feb 2020 16:03:48 +0000 (16:03 +0000)]
libstdc++ P1956R1 On the names of low-level bit manipulation functions

Implement this change for C++20 that was just approved in Prague.

P1956R1 On the names of low-level bit manipulation functions
* include/bits/hashtable_policy.h: Update comment.
* include/std/bit (__ispow2, __ceil2, __floor2, __log2p1): Rename.
(ispow2, ceil2, floor2, log2p1): Likewise.
(__cpp_lib_int_pow2): Add feature test macro.
* include/std/charconv (__to_chars_len_2): Adjust use of __log2p1.
* include/std/memory (assume_aligned): Adjust use of ispow2.
* include/std/version (__cpp_lib_int_pow2): Add.
* libsupc++/new_opa.cc: Adjust use of __ispow2.
* src/c++17/memory_resource.cc: Likewise, and for __ceil2 and __log2p1.
* testsuite/17_intro/freestanding.cc: Adjust use of ispow2.
* testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Rename to ...
* testsuite/26_numerics/bit/bit.pow.two/bit_ceil.cc: ... here.
* testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Rename to ...
* testsuite/26_numerics/bit/bit.pow.two/bit_ceil_neg.cc: ... here.
* testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Rename to ...
* testsuite/26_numerics/bit/bit.pow.two/bit_floor.cc: ... here.
* testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Rename to ...
* testsuite/26_numerics/bit/bit.pow.two/bit_width.cc: ... here.
* testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Rename to ...
* testsuite/26_numerics/bit/bit.pow.two/has_single_bit.cc: ... here.

4 years agoFix existing fold-vec-extract-longlong.p8.c testcase
Will Schmidt [Mon, 17 Feb 2020 16:22:38 +0000 (10:22 -0600)]
Fix existing fold-vec-extract-longlong.p8.c testcase

    The code generated by this test changed shortly after
    this test was committed, and we didn't get back to
    updating the scan-assembler statements to match.
    Until now.

[testsuite]
    * gcc.target/powerpc/fold-vec-extract-longlong.p8.c: Correct
    number of expected insns.

4 years agolibstdc++: Add comment to <charconv> explaining C++14 status
Jonathan Wakely [Mon, 17 Feb 2020 15:44:03 +0000 (15:44 +0000)]
libstdc++: Add comment to <charconv> explaining C++14 status

This header is intentionally valid in C++14 mode, because no conforming
C++14 program will try to include <charconv> and so it's OK to add new
(non-reserved in C++14) names to namespace std. However, other headers
must not include <charconv> transitively prior to C++17, so that we
don't add those non-reserved names without the user requesting it.

This adds a comment to the header explaining that.

* include/std/charconv: Add comment.

4 years agolibstdc++: Reduce header dependencies for C++20 (PR 92546)
Jonathan Wakely [Mon, 17 Feb 2020 15:25:33 +0000 (15:25 +0000)]
libstdc++: Reduce header dependencies for C++20 (PR 92546)

In C++20 <memory> depends on <bits/ranges_unitialized.h> which
depends on <bits/random.h> just for a single concept. Including
<bits/random.h> also requires including <cmath>, which is huge due to
the C++17 special functions.

This change moves the concept to the <bits/uniform_int_dist.h> internal
header that exists so that <bits/stl_algobase.h> doesn't need to include
<bits/random.h>.

PR libstdc++/92546 (partial)
* include/bits/random.h (uniform_random_bit_generator): Move definition
to <bits/uniform_int_dist.h>.
* include/bits/ranges_algo.h: Include <bits/uniform_int_dist.h> instead
of <bits/random.h>.
* include/bits/ranges_algobase.h: Do not include <cmath>.
* include/bits/uniform_int_dist.h (uniform_random_bit_generator):
Move here.
* include/std/ranges: Do not include <limits>.
* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.

4 years agolibstdc++: Add lightweight replacement for std::numeric_limits (PR 92546)
Jonathan Wakely [Mon, 17 Feb 2020 14:30:02 +0000 (14:30 +0000)]
libstdc++: Add lightweight replacement for std::numeric_limits (PR 92546)

Many uses of std::numeric_limits in C++17 and C++20 features only really
need the min(), max() and digits constants for integral types. By adding
__detail::__int_limits we can avoid including the whole <limits> header.

The <limits> header isn't especially large, but avoiding it still gives
small savings in compilation time and memory usage for the compiler.

There are also C++11 features that could benefit from this change (e.g.
<bits/hashtable_policy.h> and <bits/uniform_int_dist.h>) but I won't
change those until stage 1.

The implementation of __int_limits assumes two's complement integers,
which is true for all targets supported by GCC.

PR libstdc++/92546 (partial)
* include/Makefile.am: Add new header.
* include/Makefile.in: Regenerate.
* include/bits/int_limits.h: New header.
* include/bits/parse_numbers.h (__select_int::_Select_int): Replace
numeric_limits with __detail::__int_limits.
* include/std/bit (__rotl, __rotr, __countl_zero, __countl_one)
(__countr_zero, __countr_one, __popcount, __ceil2, __floor2, __log2p1):
Likewise.
* include/std/charconv (__to_chars_8, __from_chars_binary)
(__from_chars_alpha_to_num, from_chars): Likewise.
* include/std/memory_resource (polymorphic_allocator::allocate)
(polymorphic_allocator::allocate_object): Likewise.
* include/std/string_view (basic_string_view::_S_compare): Likewise.
* include/std/utility (in_range): Likewise.
* testsuite/20_util/integer_comparisons/in_range_neg.cc: Adjust for
extra error about incomplete type __int_limits<bool>.
* testsuite/26_numerics/bit/bit.count/countl_one.cc: Include <limits>.
* testsuite/26_numerics/bit/bit.count/countl_zero.cc: Likewise.
* testsuite/26_numerics/bit/bit.count/countr_one.cc: Likewise.
* testsuite/26_numerics/bit/bit.count/countr_zero.cc: Likewise.
* testsuite/26_numerics/bit/bit.count/popcount.cc: Likewise.
* testsuite/26_numerics/bit/bit.pow.two/ceil2_neg.cc: Likewise.
* testsuite/26_numerics/bit/bit.pow.two/ceil2.cc: Likewise.
* testsuite/26_numerics/bit/bit.pow.two/floor2.cc: Likewise.
* testsuite/26_numerics/bit/bit.pow.two/ispow2.cc: Likewise.
* testsuite/26_numerics/bit/bit.pow.two/log2p1.cc: Likewise.
* testsuite/26_numerics/bit/bit.rotate/rotl.cc: Likewise.
* testsuite/26_numerics/bit/bit.rotate/rotr.cc: Likewise.

4 years agolibstdc++: Fix regression in libstdc++-prettyprinters/cxx20.cc
Jonathan Wakely [Mon, 17 Feb 2020 13:20:57 +0000 (13:20 +0000)]
libstdc++: Fix regression in libstdc++-prettyprinters/cxx20.cc

* python/libstdcxx/v6/printers.py (StdCmpCatPrinter.to_string): Update
value for partial_ordering::unordered.

4 years agolibstdc++: Make "implicit expression variants" more explicit (P2102R0)
Jonathan Wakely [Mon, 17 Feb 2020 13:20:57 +0000 (13:20 +0000)]
libstdc++: Make "implicit expression variants" more explicit (P2102R0)

* include/bits/iterator_concepts.h (indirectly_copyable_storable): Add
const-qualified expression variations.
* include/std/concepts (copyable): Likewise.

4 years agolibstdc++: Implement "Safe Integral Comparisons" (P0586R2)
Jonathan Wakely [Mon, 17 Feb 2020 13:20:57 +0000 (13:20 +0000)]
libstdc++: Implement "Safe Integral Comparisons" (P0586R2)

* include/std/type_traits (__is_standard_integer): New helper trait.
* include/std/utility (cmp_equal, cmp_not_equal, cmp_less, cmp_greater)
(cmp_less_equal, cmp_greater_equal, in_range): Define for C++20.
* include/std/version (__cpp_lib_integer_comparison_functions): Define.
* testsuite/20_util/integer_comparisons/1.cc: New test.
* testsuite/20_util/integer_comparisons/2.cc: New test.
* testsuite/20_util/integer_comparisons/equal.cc: New test.
* testsuite/20_util/integer_comparisons/equal_neg.cc: New test.
* testsuite/20_util/integer_comparisons/greater_equal.cc: New test.
* testsuite/20_util/integer_comparisons/greater_equal_neg.cc: New test.
* testsuite/20_util/integer_comparisons/greater_neg.cc: New test.
* testsuite/20_util/integer_comparisons/in_range.cc: New test.
* testsuite/20_util/integer_comparisons/in_range_neg.cc: New test.
* testsuite/20_util/integer_comparisons/less.cc: New test.
* testsuite/20_util/integer_comparisons/less_equal.cc: New test.
* testsuite/20_util/integer_comparisons/less_equal_neg.cc: New test.
* testsuite/20_util/integer_comparisons/less_neg.cc: New test.
* testsuite/20_util/integer_comparisons/not_equal.cc: New test.
* testsuite/20_util/integer_comparisons/not_equal_neg.cc: New test.

4 years agoFix grammar in error message.
Martin Liska [Mon, 17 Feb 2020 12:21:34 +0000 (13:21 +0100)]
Fix grammar in error message.

PR ipa/93760
* ipa-devirt.c (odr_types_equivalent_p): Fix grammar.
PR ipa/93760
* g++.dg/lto/odr-8_1.C: Fix grammar.

4 years agoFix double quoting.
Martin Liska [Mon, 17 Feb 2020 12:21:00 +0000 (13:21 +0100)]
Fix double quoting.

PR translation/93755
* config/rs6000/rs6000.c (rs6000_option_override_internal):
Fix double quotes.

4 years agoFix a typo.
Martin Liska [Mon, 17 Feb 2020 12:20:06 +0000 (13:20 +0100)]
Fix a typo.

PR other/93756
* config/rx/elf.opt: Fix typo.
PR other/93756
* src/std/algorithm/iteration.d: Fix typo.

4 years agoc/86134 avoid errors for unrecognized -Wno- options
Richard Biener [Mon, 17 Feb 2020 08:32:44 +0000 (09:32 +0100)]
c/86134 avoid errors for unrecognized -Wno- options

This makes sure to not promote diagnostics about unrecognized -Wno-
options to errors and make the intent of the diagnostic clearer.

2020-02-17  Richard Biener  <rguenther@suse.de>

PR c/86134
* opts-global.c (print_ignored_options): Use inform and
amend message.

* gcc.dg/pr86134.c: New testcase.
* gcc.dg/pr28322-2.c: Adjust.

4 years agoanalyzer: fix ICEs in region_model::get_lvalue_1 [PR 93388]
David Malcolm [Fri, 14 Feb 2020 02:17:11 +0000 (21:17 -0500)]
analyzer: fix ICEs in region_model::get_lvalue_1 [PR 93388]

There have been various ICEs with -fanalyzer involving unhandled tree
codes in region_model::get_lvalue_1; PR analyzer/93388 reports various
others e.g. for IMAGPART_EXPR, REALPART_EXPR, and VIEW_CONVERT_EXPR seen
when running the testsuite with -fanalyzer forcibly enabled.

Whilst we could implement lvalue-handling in the region model for every
tree code, for some of these we're straying far from my primary goal for
GCC 10 of implementing a double-free checker for C.

This patch implements a fallback for unimplemented tree codes: create a
dummy region, but mark the new state as being invalid, and stop
exploring state along this path.  It also implements VIEW_CONVERT_EXPR.

Doing so fixes the ICEs, whilst effectively turning off the analyzer
along code paths that use such tree codes.  Hopefully this compromise
is sensible for GCC 10.

gcc/analyzer/ChangeLog:
PR analyzer/93388
* engine.cc (impl_region_model_context::on_unknown_tree_code):
New.
(exploded_graph::get_or_create_node): Reject invalid states.
* exploded-graph.h
(impl_region_model_context::on_unknown_tree_code): New decl.
(point_and_state::point_and_state): Assert that the state is
valid.
* program-state.cc (program_state::program_state): Initialize
m_valid to true.
(program_state::operator=): Copy m_valid.
(program_state::program_state): Likewise for move constructor.
(program_state::print): Print m_valid.
(program_state::dump_to_pp): Likewise.
* program-state.h (program_state::m_valid): New field.
* region-model.cc (region_model::get_lvalue_1): Implement the
default case by returning a new symbolic region and calling
the context's on_unknown_tree_code, rather than issuing an
internal_error.  Implement VIEW_CONVERT_EXPR.
* region-model.h (region_model_context::on_unknown_tree_code): New
vfunc.
(test_region_model_context::on_unknown_tree_code): New.

gcc/testsuite/ChangeLog:
PR analyzer/93388
* gcc.dg/analyzer/torture/20060625-1.c: New test.
* gcc.dg/analyzer/torture/pr51628-30.c: New test.
* gcc.dg/analyzer/torture/pr59037.c: New test.

4 years agoanalyzer: fix wording for assignment from NULL
David Malcolm [Wed, 12 Feb 2020 15:56:28 +0000 (10:56 -0500)]
analyzer: fix wording for assignment from NULL

This patch improves the wording of the state-transition event (1) in
the -Wanalyzer-null-dereference diagnostic for:

void test (void)
{
  int *p = NULL;
  *p = 1;
}

taking the path description from:

  ‘test’: events 1-2
    |
    |    5 |   int *p = NULL;
    |      |        ^
    |      |        |
    |      |        (1) assuming ‘p’ is NULL
    |    6 |   *p = 1;
    |      |   ~~~~~~
    |      |      |
    |      |      (2) dereference of NULL ‘p’
    |

to:

  ‘test’: events 1-2
    |
    |    5 |   int *p = NULL;
    |      |        ^
    |      |        |
    |      |        (1) ‘p’ is NULL
    |    6 |   *p = 1;
    |      |   ~~~~~~
    |      |      |
    |      |      (2) dereference of NULL ‘p’
    |

since the "assuming" at (1) only makes sense for state transitions
due to comparisons, not for assignments.

gcc/analyzer/ChangeLog:
* sm-malloc.cc (malloc_diagnostic::describe_state_change): For
transition to the "null" state, only say "assuming" when
transitioning from the "unchecked" state.

gcc/testsuite/ChangeLog:
* gcc.dg/analyzer/malloc-1.c (test_48): New.

4 years agoanalyzer: add diagnostics to output of -fdump-analyzer-exploded-graph
David Malcolm [Tue, 11 Feb 2020 22:13:44 +0000 (17:13 -0500)]
analyzer: add diagnostics to output of -fdump-analyzer-exploded-graph

gcc/analyzer/ChangeLog:
* diagnostic-manager.h (diagnostic_manager::get_saved_diagnostic):
Add const overload.
* engine.cc (exploded_node::dump_dot): Dump saved_diagnostics.
* exploded-graph.h (exploded_graph::get_diagnostic_manager): Add
const overload.

4 years agors6000: mark clobber for registers changed by untpyed_call
Jiufu Guo [Mon, 17 Feb 2020 02:48:39 +0000 (10:48 +0800)]
rs6000: mark clobber for registers changed by untpyed_call

As PR93047 said, __builtin_apply/__builtin_return does not work well with
-frename-registers.  This is caused by return register(e.g. r3) is used to
rename another register, before return register is stored to stack.
This patch fix this issue by emitting clobber for those egisters which
maybe changed by untyped call.

gcc/
2020-02-17  Jiufu Guo  <guojiufu@linux.ibm.com>

PR target/93047
* config/rs6000/rs6000.md (untyped_call): Add emit_clobber.

gcc/testsuite
2020-02-17  Jiufu Guo  <guojiufu@linux.ibm.com>

PR target/93047
* gcc.dg/torture/stackalign/builtin-return-2.c: New test case.

4 years agoDaily bump.
GCC Administrator [Mon, 17 Feb 2020 00:16:51 +0000 (00:16 +0000)]
Daily bump.

4 years agoi386: Fix atan2l argument order [PR93743]
Uros Bizjak [Sun, 16 Feb 2020 20:38:39 +0000 (21:38 +0100)]
i386: Fix atan2l argument order [PR93743]

PR target/93743
* config/i386/i386.md (atan2xf3): Swap operands 1 and 2.
(atan2<mode>3): Update operand order in the call to gen_atan2xf3.

testsuite/ChangeLog:

PR target/93743
* gcc.target/i386/pr93743.c : New test.

4 years agolibgo: install internal/reflectlite.gox
Ian Lance Taylor [Sat, 15 Feb 2020 23:57:29 +0000 (15:57 -0800)]
libgo: install internal/reflectlite.gox

This makes it possible to use gccgo to bootstrap Go 1.14.
If we don't install this, gccgo can't compile the sort package.

Fixes GCC PR go/93679

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/219617

4 years agolibbacktrace: update to current libgo test file
Ian Lance Taylor [Sun, 16 Feb 2020 02:24:35 +0000 (18:24 -0800)]
libbacktrace: update to current libgo test file

* ztest.c (test_large): Update file to current libgo test file.

4 years agolibstdc++: Move code after an early exit constexpr if to under an else branch
Patrick Palka [Sat, 15 Feb 2020 15:59:36 +0000 (10:59 -0500)]
libstdc++: Move code after an early exit constexpr if to under an else branch

This avoids instantiating dead code when the true branch of the constexpr if is
taken.

libstdc++-v3/ChangeLog:

* include/bits/ranges_algo.h (__lexicographical_compare_fn::operator()):
Move code after an early exit constexpr if to under an else branch.
* include/bits/ranges_algobase.h (__equal_fn::operator()): Likewise.

4 years agoDaily bump.
GCC Administrator [Sun, 16 Feb 2020 00:16:39 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Fix poor diagnostic for array initializer [PR93710]
Marek Polacek [Wed, 12 Feb 2020 19:00:51 +0000 (14:00 -0500)]
c++: Fix poor diagnostic for array initializer [PR93710]

A small improvement for an error in build_user_type_conversion_1:
instead of

array-init1.C:11:1: error: conversion from ‘long int’ to ‘A’ is ambiguous
   11 | };
      | ^

we will print

array-init1.C:8:3: error: conversion from ‘long int’ to ‘A’ is ambiguous
    8 |   0L,
      |   ^~

2020-02-12  Marek Polacek  <polacek@redhat.com>

PR c++/93710 - poor diagnostic for array initializer.
* call.c (build_user_type_conversion_1): Use cp_expr_loc_or_input_loc
for an error call.

* g++.dg/diagnostic/array-init1.C: New test.

4 years agoc++: Add -std=c++20.
Jason Merrill [Sat, 15 Feb 2020 15:20:46 +0000 (16:20 +0100)]
c++: Add -std=c++20.

It's probably past time for this, but definitely now that we're done with
the final committee meeting of C++20.  This patch only adds the option and
adjusts the testsuite to recognize it; more extensive changes can wait for
the published standard.

gcc/ChangeLog
2020-02-15  Jason Merrill  <jason@redhat.com>

* doc/invoke.texi (C Dialect Options): Add -std=c++20.

gcc/c-family/ChangeLog
2020-02-15  Jason Merrill  <jason@redhat.com>

* c.opt: Add -std=c++20.

gcc/testsuite/ChangeLog
2020-02-15  Jason Merrill  <jason@redhat.com>

* lib/target-supports.exp (check_effective_target_c++2a_only): Also
look for -std=*++20.
(check_effective_target_concepts): Use check_effective_target_c++2a.

4 years agolibgo: update to Go1.14rc1 release
Ian Lance Taylor [Wed, 5 Feb 2020 22:33:27 +0000 (14:33 -0800)]
libgo: update to Go1.14rc1 release

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/218017

4 years agoruntime: on 32-bit systems, limit default GOMAXPROCS to 32
Ian Lance Taylor [Thu, 13 Feb 2020 04:35:50 +0000 (20:35 -0800)]
runtime: on 32-bit systems, limit default GOMAXPROCS to 32

Otherwise we can easily run out of stack space for threads.

The user can still override by setting GOMAXPROCS.

Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/219278

4 years agolibstdc++: Whitespace and formatting adjustments
Patrick Palka [Thu, 13 Feb 2020 20:03:50 +0000 (15:03 -0500)]
libstdc++: Whitespace and formatting adjustments

libstdc++-v3/ChangeLog:

* include/bits/ranges_algo.h: Adjust whitespace and formatting.
* include/bits/ranges_algobase.h: Likewise.
* include/bits/ranges_uninitialized.h: Likewise.

4 years agolibstdc++: Convert the ranges algorithm entities into function objects
Patrick Palka [Thu, 13 Feb 2020 17:17:01 +0000 (12:17 -0500)]
libstdc++: Convert the ranges algorithm entities into function objects

This is the standard way to inhibit ADL for these entities, which is required as
per [algorithms.requirements] p2 and [specialized.algorithms] p4.  The
conversion was done mostly mechanically with a custom Vim macro.

libstdc++-v3/ChangeLog:

* include/bits/ranges_algo.h: (adjacent_find, all_of, any_of,
binary_search, copy_if, count, count_if, equal_range, find, find_end,
find_first_of, find_if, find_if_not, for_each, generate, generate_n,
includes, inplace_merge, is_heap, is_heap_until, is_partitioned,
is_permutation, is_sorted, is_sorted_until, lexicographical_compare,
lower_bound, make_heap, max, max_element, merge, min, min_element,
minmax, minmax_element, mismatch, next_permutation, none_of,
nth_element, partial_sort, partial_sort_copy, partition, partition_copy,
partition_point, pop_heap, prev_permutation, push_heap, remove,
remove_copy, remove_copy_if, remove_if, replace, replace_copy,
replace_copy_if, replace_if, reverse, reverse_copy, rotate, rotate_copy,
search, search_n, set_difference, set_intersection,
set_symmetric_difference, set_union, shuffle, sort, sort_heap,
stable_partition, stable_sort, swap_ranges, transform, unique,
unique_copy, upper_bound): Convert into function objects.
* include/bits/ranges_algobase.h: (equal, copy, move, copy_n, fill_n,
fill, move_backward, copy_backward): Likewise.
* include/bits/ranges_uninitialized.h (uninitialized_default_construct,
uninitialized_default_construct_n, uninitialized_value_construct,
uninitialized_value_construct_n, uninitialized_copy,
uninitialized_copy_n, uninitialized_move, uninitialized_move_n,
uninitialized_fill, uninitialized_fill_n, construct_at, destroy_at,
destroy, destroy_n): Likewise.

4 years agolibstdc++: Fold some ranges algo subroutines into their only caller
Patrick Palka [Thu, 13 Feb 2020 15:55:10 +0000 (10:55 -0500)]
libstdc++: Fold some ranges algo subroutines into their only caller

These subroutines have only a single call site, so it might be best and simplest
to eliminate them before we convert the algos into function objects.

libstdc++-v3/ChangeLog:

* include/bits/ranges_algo.h (ranges::__find_end): Fold into ...
(ranges::find_end): ... here.
(ranges::__lexicographical_compare): Fold into ...
(ranges::lexicographical_compare): ... here.
* include/bits/ranges_algobase.h (ranges::__equal): Fold into ...
(ranges::equal): ... here.

4 years agoc++: Add test for PR 68061.
Jason Merrill [Sat, 15 Feb 2020 14:11:01 +0000 (15:11 +0100)]
c++: Add test for PR 68061.

PR c++/68061
* g++.dg/concepts/attrib1.C: New.

4 years agoc++: Fix lambda in atomic constraint.
Jason Merrill [Sat, 15 Feb 2020 13:48:08 +0000 (14:48 +0100)]
c++: Fix lambda in atomic constraint.

find_template_parameters needs to find the mention of T in the lambda.
Fixing that leaves this as a hard error, which may be surprising but is
consistent with lambdas in other SFINAE contexts like template argument
deduction.

gcc/cp/ChangeLog
2020-02-15  Jason Merrill  <jason@redhat.com>

PR c++/92556
* pt.c (any_template_parm_r): Look into lambda body.

4 years agoc++: Remove more dead code.
Jason Merrill [Sat, 15 Feb 2020 13:48:08 +0000 (14:48 +0100)]
c++: Remove more dead code.

gcc/cp/ChangeLog
2020-02-15  Jason Merrill  <jason@redhat.com>

PR c++/92583
* pt.c (any_template_parm_r): Remove CONSTRUCTOR handling.

4 years agoc++: Add testcase for PR 90764.
Jason Merrill [Sat, 15 Feb 2020 13:48:08 +0000 (14:48 +0100)]
c++: Add testcase for PR 90764.

     PR c++/90764
     * g++.dg/cpp1z/class-deduction69.C: New.

4 years agomatch.pd: Disallow side-effects in GENERIC for non-COND_EXPR to COND_EXPR simplificat...
Jakub Jelinek [Sat, 15 Feb 2020 11:53:44 +0000 (12:53 +0100)]
match.pd: Disallow side-effects in GENERIC for non-COND_EXPR to COND_EXPR simplifications [PR93744]

As the following testcases show (the first one reported, last two
found by code inspection), we need to disallow side-effects
in simplifications that turn some unconditional expression into conditional
one.  From my little understanding of genmatch.c, it is able to
automatically disallow side effects if the same operand is used multiple
times in the match pattern, maybe if it is used multiple times in the
replacement pattern, and if it is used in conditional contexts in the match
pattern, could it be taught to handle this case too?  If yes, perhaps
just the first hunk could be usable for 8/9 backports (+ the testcases).

2020-02-15  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/93744
* match.pd (((m1 >/</>=/<= m2) * d -> (m1 >/</>=/<= m2) ? d : 0,
A - ((A - B) & -(C cmp D)) -> (C cmp D) ? B : A,
A + ((B - A) & -(C cmp D)) -> (C cmp D) ? B : A): For GENERIC, make
sure @2 in the first and @1 in the other patterns has no side-effects.

* gcc.c-torture/execute/pr93744-1.c: New test.
* gcc.c-torture/execute/pr93744-2.c: New test.
* gcc.c-torture/execute/pr93744-3.c: New test.

4 years agolibstdc++: Update __cpp_lib_erase_if macro (P1115R3)
Jonathan Wakely [Sat, 15 Feb 2020 09:02:30 +0000 (09:02 +0000)]
libstdc++: Update __cpp_lib_erase_if macro (P1115R3)

Now that this feature has been approved for C++20 we can define the
macro to the official value.

* include/bits/erase_if.h (__cpp_lib_erase_if): Define to 202002L.
* include/std/deque: Likewise.
* include/std/forward_list: Likewise.
* include/std/list: Likewise.
* include/std/string: Likewise.
* include/std/vector: Likewise.
* include/std/version: Likewise.
* testsuite/23_containers/deque/erasure.cc: Test for new value.
* testsuite/23_containers/forward_list/erasure.cc: Likewise.
* testsuite/23_containers/list/erasure.cc: Likewise.
* testsuite/23_containers/map/erasure.cc: Likewise.
* testsuite/23_containers/set/erasure.cc: Likewise.
* testsuite/23_containers/unordered_map/erasure.cc: Likewise.
* testsuite/23_containers/unordered_set/erasure.cc: Likewise.
* testsuite/23_containers/vector/erasure.cc: Likewise.

4 years agolibstdc++: Implement LWG 3150 for std::uniform_random_bit_generator
Jonathan Wakely [Sat, 15 Feb 2020 08:58:43 +0000 (08:58 +0000)]
libstdc++: Implement LWG 3150 for std::uniform_random_bit_generator

* include/bits/random.h (uniform_random_bit_generator): Require min()
and max() to be constant expressions and min() to be less than max().
* testsuite/26_numerics/random/concept.cc: Check additional cases.
* testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error lineno.

4 years agoPR 87488: Add --with-diagnostics-urls configuration option
Bernd Edlinger [Wed, 29 Jan 2020 14:31:10 +0000 (15:31 +0100)]
PR 87488: Add --with-diagnostics-urls configuration option

2020-02-15  David Malcolm  <dmalcolm@redhat.com>
    Bernd Edlinger  <bernd.edlinger@hotmail.de>

PR 87488
PR other/93168
* config.in (DIAGNOSTICS_URLS_DEFAULT): New define.
* configure.ac (--with-diagnostics-urls): New configuration
option, based on --with-diagnostics-color.
(DIAGNOSTICS_URLS_DEFAULT): New define.
* config.h: Regenerate.
* configure: Regenerate.
* diagnostic.c (diagnostic_urls_init): Handle -1 for
DIAGNOSTICS_URLS_DEFAULT from configure-time
--with-diagnostics-urls=auto-if-env by querying for a GCC_URLS
and TERM_URLS environment variable.
* diagnostic-url.h (diagnostic_url_format): New enum type.
(diagnostic_urls_enabled_p): rename to...
(determine_url_format): ... this, and change return type.
* diagnostic-color.c (parse_env_vars_for_urls): New helper function.
(auto_enable_urls): Disable URLs on xfce4-terminal, gnome-terminal,
the linux console, and mingw.
(diagnostic_urls_enabled_p): rename to...
(determine_url_format): ... this, and adjust.
* pretty-print.h (pretty_printer::show_urls): rename to...
(pretty_printer::url_format): ... this, and change to enum.
* pretty-print.c (pretty_printer::pretty_printer,
pp_begin_url, pp_end_url, test_urls): Adjust.
* doc/install.texi (--with-diagnostics-urls): Document the new
configuration option.
(--with-diagnostics-color): Document the existing interaction
with GCC_COLORS better.
* doc/invoke.texi (-fdiagnostics-urls): Add GCC_URLS and TERM_URLS
vindex reference.  Update description of defaults based on the above.
(-fdiagnostics-color): Update description of how -fdiagnostics-color
interacts with GCC_COLORS.

4 years agoDocument compatibility of aliases and their targets, correct weakref example.
Martin Sebor [Sat, 15 Feb 2020 00:13:29 +0000 (17:13 -0700)]
Document compatibility of aliases and their targets, correct weakref example.

gcc/ChangeLog:

* doc/extend.texi (attribute alias): Mention type requirement.
(attribute weak): Same.
(attribute weakref): Correct invalid example.

4 years agoFix duplicates for anonymous structures with -fdump-ada-spec
Eric Botcazou [Fri, 14 Feb 2020 23:11:04 +0000 (00:11 +0100)]
Fix duplicates for anonymous structures with -fdump-ada-spec

This fixes a weakness in the way -fdump-ada-spec builds names for
anonymous structures in the C/C++ code, resulting in duplicate
identifiers under specific circumstances.

c-family/
* c-ada-spec.c: Include bitmap.h.
(dump_ada_double_name): Rename into...
(dump_anonymous_type_name): ...this.  Always use the TYPE_UID.
(dump_ada_array_type): Adjust to above renaming.  Robustify.
(dump_nested_types_1): New function copied from...  Add
dumped_types parameter and pass it down to dump_nested_type.
(dump_nested_types): ...this.  Remove parent parameter.  Just
call dump_nested_types_1 on an automatic bitmap.
(dump_nested_type): Add dumped_types parameter.
<ARRAY_TYPE>: Do not dump it if already present in dumped_types.
Adjust recursive calls and adjust to above renaming.
(dump_ada_declaration): Adjust call to dump_nested_types.
Tidy up and adjust to above renaming.
(dump_ada_specs): Initialize and release bitmap obstack.

4 years agoUpdate .po files.
Joseph Myers [Fri, 14 Feb 2020 22:00:13 +0000 (22:00 +0000)]
Update .po files.

gcc/po:
* be.po, da.po, de.po, el.po, es.po, fi.po, fr.po, hr.po, id.po,
ja.po, nl.po, ru.po, sr.po, sv.po, tr.po, uk.po, vi.po, zh_CN.po,
zh_TW.po: Update.

libcpp/po:
* be.po, ca.po, da.po, de.po, el.po, eo.po, es.po, fi.po, fr.po,
id.po, ja.po, nl.po, pt_BR.po, ru.po, sr.po, sv.po, tr.po, uk.po,
vi.po, zh_CN.po, zh_TW.po: Update.

4 years agoFix problematic TLS sequences for the Solaris linker
Eric Botcazou [Fri, 14 Feb 2020 18:21:02 +0000 (19:21 +0100)]
Fix problematic TLS sequences for the Solaris linker

This is an old thinko pertaining to the interaction between TLS
sequences and delay slot filling: the compiler knows that it cannot
put instructions with TLS relocations into delay slots with the
original Sun TLS model, but it tests TARGET_SUN_TLS in this context,
which depends only on the assembler.  So if the compiler is configured
with the GNU assembler and the Solaris linker, then TARGET_GNU_TLS is
set instead and the limitation is not enforced.

PR target/93704
* config/sparc/sparc.c (eligible_for_call_delay): Test HAVE_GNU_LD
in conjunction with TARGET_GNU_TLS in early return.

4 years agortlanal: optimize costly division in rtx_cost
Alexander Monakov [Fri, 14 Feb 2020 17:14:36 +0000 (20:14 +0300)]
rtlanal: optimize costly division in rtx_cost

There's a costly signed 64-bit division in rtx_cost on x86 as well as
any other target where UNITS_PER_WORD expands to TARGET_64BIT ?  8 : 4.
It's also evident that rtx_cost does redundant work for a SET.

Obviously the variable named 'factor' rarely exceeds 1, so in the
majority of cases it can be computed with a well-predictable branch
rather than a division.

This patch makes rtx_cost do the division only in case mode is wider
than UNITS_PER_WORD, and also moves a test for a SET up front to avoid
redundancy.
No functional change.

* rtlanal.c (rtx_cost): Handle a SET up front. Avoid division if
the mode is not wider than UNITS_PER_WORD.

4 years agoc++: Fix thinko in enum_min_precision [PR61414]
Jakub Jelinek [Fri, 14 Feb 2020 16:36:00 +0000 (17:36 +0100)]
c++: Fix thinko in enum_min_precision [PR61414]

When backporting the PR61414 fix to 8.4, I've noticed that the caching
of prec is actually broken, as it would fail to actually store the computed
precision into the hash_map's value and so next time we'd think the enum needs
0 bits.

2020-02-14  Jakub Jelinek  <jakub@redhat.com>

PR c++/61414
* class.c (enum_min_precision): Change prec type from int to int &.

* g++.dg/cpp0x/enum39.C: New test.

4 years agosra: Avoid verification failure (PR 93516)
Martin Jambor [Fri, 14 Feb 2020 14:02:35 +0000 (15:02 +0100)]
sra: Avoid verification failure (PR 93516)

get_ref_base_and_extent can return different sizes for COMPONENT_REFs
and DECLs of the same type, with the latter including (more?)  padding.
When in the IL there is an assignment between such a COMPONENT_REF and a
DECL, SRA will try to propagate the access from the former as a child of
the latter, creating an artificial reference that does not match the
access's declared size, which triggers a verifier assert.

Fixed by teaching the propagation functions about this special situation
so that they don't do it.  The condition is the same that
build_user_friendly_ref_for_offset uses so the artificial reference
causing the verifier is guaranteed not to be created.

2020-02-14  Martin Jambor  <mjambor@suse.cz>

PR tree-optimization/93516
* tree-sra.c (propagate_subaccesses_from_rhs): Do not create
access of the same type as the parent.
(propagate_subaccesses_from_lhs): Likewise.

gcc/testsuite/
* g++.dg/tree-ssa/pr93516.C: New test.

4 years agoAdd ChangeLog entries to relevant ChangeLog files for my last commit.
liuhongt [Fri, 14 Feb 2020 13:01:55 +0000 (21:01 +0800)]
Add ChangeLog entries to relevant ChangeLog files for my last commit.

4 years agoIntrinsic macro of vpshr* and vpshl* lack a closing parenthesis which would cause...
liuhongt [Wed, 12 Feb 2020 10:04:42 +0000 (18:04 +0800)]
Intrinsic macro of vpshr* and vpshl* lack a closing parenthesis which would cause failure in O0.

2020-02-14 Hongtao Liu  <hongtao.liu@intel.com>

gcc/
PR target/93724
* config/i386/avx512vbmi2intrin.h
(_mm512_shrdi_epi16, _mm512_mask_shrdi_epi16,
_mm512_maskz_shrdi_epi16, _mm512_shrdi_epi32,
_mm512_mask_shrdi_epi32, _mm512_maskz_shrdi_epi32,
_m512_shrdi_epi64, _m512_mask_shrdi_epi64,
_m512_maskz_shrdi_epi64, _mm512_shldi_epi16,
_mm512_mask_shldi_epi16, _mm512_maskz_shldi_epi16,
_mm512_shldi_epi32, _mm512_mask_shldi_epi32,
_mm512_maskz_shldi_epi32, _mm512_shldi_epi64,
_mm512_mask_shldi_epi64, _mm512_maskz_shldi_epi64): Fix typo
of lacking a closing parenthesis.
* config/i386/avx512vbmi2vlintrin.h
(_mm256_shrdi_epi16, _mm256_mask_shrdi_epi16,
_mm256_maskz_shrdi_epi16, _mm256_shrdi_epi32,
_mm256_mask_shrdi_epi32, _mm256_maskz_shrdi_epi32,
_m256_shrdi_epi64, _m256_mask_shrdi_epi64,
_m256_maskz_shrdi_epi64, _mm256_shldi_epi16,
_mm256_mask_shldi_epi16, _mm256_maskz_shldi_epi16,
_mm256_shldi_epi32, _mm256_mask_shldi_epi32,
_mm256_maskz_shldi_epi32, _mm256_shldi_epi64,
_mm256_mask_shldi_epi64, _mm256_maskz_shldi_epi64,
_mm_shrdi_epi16, _mm_mask_shrdi_epi16,
_mm_maskz_shrdi_epi16, _mm_shrdi_epi32,
_mm_mask_shrdi_epi32, _mm_maskz_shrdi_epi32,
_mm_shrdi_epi64, _mm_mask_shrdi_epi64,
_m_maskz_shrdi_epi64, _mm_shldi_epi16,
_mm_mask_shldi_epi16, _mm_maskz_shldi_epi16,
_mm_shldi_epi32, _mm_mask_shldi_epi32,
_mm_maskz_shldi_epi32, _mm_shldi_epi64,
_mm_mask_shldi_epi64, _mm_maskz_shldi_epi64): Ditto.

gcc/testsuite/
* gcc.target/i386/avx512vbmi2-vpshld-1.c: New test.
* gcc.target/i386/avx512vbmi2-vpshrd-1.c: Ditto.
* gcc.target/i386/sse-12.c: Add -mavx512vbmi2.
* gcc.target/i386/sse-13.c: Ditto.
* gcc.target/i386/sse-14.c: Add -mavx512vbmi2 and tests.
* gcc.target/i386/sse-22.c: Ditto.

4 years agoc++: Partially implement P1042R1: __VA_OPT__ wording clarifications [PR92319]
Jakub Jelinek [Fri, 14 Feb 2020 08:04:14 +0000 (09:04 +0100)]
c++: Partially implement P1042R1: __VA_OPT__ wording clarifications [PR92319]

I've noticed we claim in cxx-status.html that we implement P1042R1,
but it seems we don't implement any of the changes from there.
The following patch implements just the change that __VA_OPT__ determines
whether to expand to nothing or the enclosed tokens no longer based on
whether there were any tokens passed to __VA_ARGS__, but whether __VA_ARGS__
expands to any tokens (from testing apparently it has to be non-CPP_PADDING
tokens).

I'm afraid I'm completely lost about the padding preservation/removal
changes that are also in the paper, so haven't touched that part.

2020-02-14  Jakub Jelinek  <jakub@redhat.com>

Partially implement P1042R1: __VA_OPT__ wording clarifications
PR preprocessor/92319
* macro.c (expand_arg): Move declarations before vaopt_state
definition.
(class vaopt_state): Move enum update_type definition earlier.  Remove
m_allowed member, add m_arg and m_update members.
(vaopt_state::vaopt_state): Change last argument from bool any_args
to macro_arg *arg, initialize m_arg and m_update instead of m_allowed.
(vaopt_state::update): When bumping m_state from 1 to 2 and m_update
is ERROR, determine if __VA_ARGS__ expansion has any non-CPP_PADDING
tokens and set m_update to INCLUDE if it has any, DROP otherwise.
Return m_update instead of m_allowed ? INCLUDE : DROP in m_state >= 2.
(replace_args, create_iso_definition): Adjust last argument to
vaopt_state ctor.

* c-c++-common/cpp/va-opt-4.c: New test.

4 years agoDaily bump.
GCC Administrator [Fri, 14 Feb 2020 00:16:36 +0000 (00:16 +0000)]
Daily bump.

4 years agors6000: fixinc: Skip machine_name fix for powerpc*-*-linux*
Matheus Castanho [Thu, 13 Feb 2020 23:43:39 +0000 (23:43 +0000)]
rs6000: fixinc: Skip machine_name fix for powerpc*-*-linux*

Some system headers can be broken by the machine_name fix performed
by GCC during the fixincludes step. According to the comment in
fixincludes/fixinc.h:130 :

   On some platforms, machine_name doesn't work properly and
   breaks some of the header files.  Since everything works
   properly without it, just wipe the macro list to
   disable the fix.

So we can just skip it to avoid trouble.

fixincludes/
* fixinc.in: Skip machine_name fix on powerpc*-*-linux*.

4 years agoc++: Emit DFP typeinfos even when DFP is disabled [PR92906]
Jakub Jelinek [Thu, 13 Feb 2020 23:11:24 +0000 (00:11 +0100)]
c++: Emit DFP typeinfos even when DFP is disabled [PR92906]

Before Joseph's changes when compiling
libstdc++-v3/libsupc++/fundamental_type_info.cc
we were emitting
_ZTIPDd, _ZTIPDe, _ZTIPDf, _ZTIPKDd, _ZTIPKDe, _ZTIPKDf, _ZTIDd, _ZTIDe, _ZTIDf
symbols even when DFP wasn't usable, but now we don't and thus those 9
symbols @@CXXABI_1.3.4 are gone from libstdc++.  While nothing could
probably use it (except perhaps dlsym etc.), various tools don't really like
symbols disappearing from symbol versioned shared libraries with stable ABI.
Adding those in assembly would be possible, but would be a portability
nightmare (the PR has something Red Hat uses in libstdc++_nonshared.a, but that
can handle only a handful of linux ELF targets we care about).
So, instead this patch hacks up the FE, so that it emits those, but in a way
that won't make the DFP types available again on targets that don't support
them.

2020-02-14  Jakub Jelinek  <jakub@redhat.com>

PR libstdc++/92906
* cp-tree.h (enum cp_tree_index): Add CPTI_FALLBACK_DFLOAT32_TYPE,
CPTI_FALLBACK_DFLOAT64_TYPE and CPTI_FALLBACK_DFLOAT128_TYPE.
(fallback_dfloat32_type, fallback_dfloat64_type,
fallback_dfloat128_type): Define.
* mangle.c (write_builtin_type): Handle fallback_dfloat*_type like
dfloat*_type_node.
* rtti.c (emit_support_tinfos): Emit DFP typeinfos even when dfp
is disabled for compatibility.

4 years agoc++: Fix useless using-declaration.
Jason Merrill [Thu, 13 Feb 2020 15:56:08 +0000 (16:56 +0100)]
c++: Fix useless using-declaration.

Here reintroducing the same declarations into the global namespace via
using-declaration is useless but OK.  And a function and a function template
with the same parameters do not conflict.

gcc/cp/ChangeLog
2020-02-13  Jason Merrill  <jason@redhat.com>

PR c++/93713
* name-lookup.c (matching_fn_p): A function does not match a
template.

4 years agoc++: Fix static local vars in extern "C".
Jason Merrill [Thu, 13 Feb 2020 15:42:04 +0000 (16:42 +0100)]
c++: Fix static local vars in extern "C".

Since my patch for PR 91476 moved visibility determination sooner, a local
static in a vague linkage function now gets TREE_PUBLIC set before
retrofit_lang_decl calls set_decl_linkage, which was making decl_linkage
think that it has external linkage.  It still has no linkage according to
the standard.

gcc/cp/ChangeLog
2020-02-13  Jason Merrill  <jason@redhat.com>

PR c++/93643
PR c++/91476
* tree.c (decl_linkage): Always lk_none for locals.

4 years agolibstdc++: Implement ranges [specialized.algorithms]
Patrick Palka [Wed, 12 Feb 2020 17:54:47 +0000 (12:54 -0500)]
libstdc++: Implement ranges [specialized.algorithms]

This implements all the ranges members defined in [specialized.algorithms]:

  ranges::uninitialized_default_construct
  ranges::uninitialized_value_construct
  ranges::uninitialized_copy
  ranges::uninitialized_copy_n
  ranges::uninitialized_move
  ranges::uninitialized_move_n
  ranges::uninitialized_fill
  ranges::uninitialized_fill_n
  ranges::construct_at
  ranges::destroy_at
  ranges::destroy

It also implements (hopefully correctly) the "obvious" optimizations for these
algos, namely that if the output range has a trivial value type and if the
appropriate operation won't throw then we can dispatch to the standard ranges
version of the algorithm which will then potentially enable further
optimizations.

libstdc++-v3/ChangeLog:

* include/Makefile.am: Add <bits/ranges_uninitialized.h>.
* include/Makefile.in: Regenerate.
* include/bits/ranges_uninitialized.h: New header.
* include/std/memory: Include it.
* testsuite/20_util/specialized_algorithms/destroy/constrained.cc: New
test.
* .../uninitialized_copy/constrained.cc: New test.
* .../uninitialized_default_construct/constrained.cc: New test.
* .../uninitialized_fill/constrained.cc: New test.
* .../uninitialized_move/constrained.cc: New test.
* .../uninitialized_value_construct/constrained.cc: New test.

4 years agolibstdc++: Move some ranges algos to a new header <bits/ranges_algobase.h>
Patrick Palka [Wed, 12 Feb 2020 17:30:57 +0000 (12:30 -0500)]
libstdc++: Move some ranges algos to a new header <bits/ranges_algobase.h>

This roughly mirrors the existing split between <bits/stl_algo.h> and
<bits/stl_algobase.h>.  The ranges [specialized.algorithms] will use this new
header to avoid including all of of <bits/ranges_algo.h>.

libstdc++-v3/ChangeLog:

* include/Makefile.am: Add bits/ranges_algobase.h
* include/Makefile.in: Regenerate.
* bits/ranges_algo.h: Include <bits/ranges_algobase.h> and refactor
existing #includes.
(__detail::__is_normal_iterator, __detail::is_reverse_iterator,
__detail::__is_move_iterator, copy_result, move_result,
__equal, equal, copy_result, move_result, move_backward_result,
copy_backward_result, __copy_or_move_backward, __copy_or_move, copy,
move, copy_backward, move_backward, copy_n_result, copy_n, fill_n,
fill): Split out into ...
* bits/range_algobase.h: ... this new header.

4 years agoc: Fix ICE with cast to VLA [93576]
Jakub Jelinek [Thu, 13 Feb 2020 20:00:09 +0000 (21:00 +0100)]
c: Fix ICE with cast to VLA [93576]

The following testcase ICEs, because the PR84305 changes try to evaluate
the size earlier.  If size has side-effects, that is desirable, and the
side-effects will actually be wrapped in a SAVE_EXPR.  The problem on this
testcase is that there are no side-effects, and c_fully_fold doesn't fold
those COMPOUND_EXPRs to constant, and while before gimplification we unshare
trees found in the expressions, the unsharing doesn't involve TYPE_SIZE etc.
of used types.  Gimplification is destructive though, so when we gimplify
the two nested COMPOUND_EXPRs and then try to gimplify it the second time
for the TYPE_SIZEs, we ICE.
Now, we could use unshare_expr in what we push to *expr, SAVE_EXPRs and
their operands in there aren't unshared, but I really don't see a point of
evaluating expressions that don't have side-effects before, so instead
this just pushes there expressions that do have side-effects.

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

PR c/93576
* c-decl.c (grokdeclarator): If this_size_varies, only push size into
*expr if it has side effects.

* gcc.dg/pr93576.c: New test.

4 years agoskip fixinc on vxworks7*, amend mkheaders
Alexandre Oliva [Thu, 13 Feb 2020 18:52:18 +0000 (15:52 -0300)]
skip fixinc on vxworks7*, amend mkheaders

vxworks7 headers haven't required fixes, and we've decided to avoid
running fixinc on them.

The problem with that is that, with a dummy fixinc, mkheaders wipes
out include-fixed but then multi_dir subdirs are not created again, so
we end up with a limits.h named after each multi_dir, when there are
non-default multilibs.  Oops.

This patch arranges for a dummy fixinc to be created for *-*-vxworks7*
targets, and fixes mkheaders so as to create multi_dir subdirs in
include-fixed after wiping them out, and to copy limits.h so that it
won't take the name that should be of a subdir (unless the multi_dir
is limits.h, but that's hopefully never the case ;-)

for  fixincludes/ChangeLog

* mkheaders.in: Re-create subdirs, copy limits.h into subdir.
* mkfixinc.sh: Create dummy fixinc for *-*-vxworks7*.

4 years agoAdd -fdelete-null-pointer-checks to more new C++ testcases.
Sandra Loosemore [Thu, 13 Feb 2020 18:47:55 +0000 (10:47 -0800)]
Add -fdelete-null-pointer-checks to more new C++ testcases.

2020-02-13  Sandra Loosemore  <sandra@codesourcery.com>

gcc/testsuite/
* g++.dg/cpp0x/constexpr-static13.C:
Add -fdelete-null-pointer-checks.
* g++.dg/cpp2a/constexpr-new11.C: Likewise.
* g++.dg/cpp2a/constexpr-new12.C: Likewise.

4 years agoi386: Skip ENDBR32 at the target function entry
H.J. Lu [Thu, 13 Feb 2020 13:28:38 +0000 (05:28 -0800)]
i386: Skip ENDBR32 at the target function entry

Skip ENDBR32 at the target function entry when initializing trampoline.

Tested on Linux/x86-64 CET machine with and without -m32.

gcc/

PR target/93656
* config/i386/i386.c (ix86_trampoline_init): Skip ENDBR32 at
the target function entry.

gcc/testsuite/

PR target/93656
* gcc.target/i386/pr93656.c: New test.

4 years agoarc: Don't use if-conversion when optimizing for size.
Claudiu Zissulescu [Thu, 13 Feb 2020 10:32:05 +0000 (12:32 +0200)]
arc: Don't use if-conversion when optimizing for size.

For ARC, predicated instructions are not very friendly with size
optimizations, leading to increased object size. Disable if-conversion
step when optimized for size.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* common/config/arc/arc-common.c (arc_option_optimization_table):
Disable if-conversion step when optimized for size.

Signed-off-by: Claudiu Zissulescu <claziss@gmail.com>
4 years ago[ARC] Deprecate q-class option.
Claudiu Zissulescu [Thu, 13 Feb 2020 10:32:05 +0000 (12:32 +0200)]
[ARC] Deprecate q-class option.

This option was used to control the short instruction selection.  However,
there is no difference in cycles if we use or not a short instruction,
and always someone wants a smaller program.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* config/arc/arc.c (arc_conditional_register_usage): R0-R3 and
R12-R15 are always in ARCOMPACT16_REGS register class.
* config/arc/arc.opt (mq-class): Deprecate.
* config/arc/constraint.md ("q"): Remove dependency on mq-class
option.
* doc/invoke.texi (mq-class): Update text.
* common/config/arc/arc-common.c (arc_option_optimization_table):
Update list.

testsuite/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* gcc.target/arc/nps400-1.c: Update test.

4 years ago[ARC] Use TARGET_INSN_COST.
Claudiu Zissulescu [Thu, 13 Feb 2020 10:32:05 +0000 (12:32 +0200)]
[ARC] Use TARGET_INSN_COST.

TARGET_INSN_COST gives us a better control over the instruction costs
than classical RTX_COSTS.  A simple cost scheme is in place for the
time being, when optimizing for size, the cost is given by the
instruction length. When optimizing for speed, the cost is 1 for any
recognized instruction, and 2 for any load/store instruction.  The
latter one can be overwritten by using cost attribute for an
instruction.  Due to this change, we need to update also a number of
instruction patterns with a new predicate to better reflect the costs.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* config/arc/arc.c (arc_insn_cost): New function.
(TARGET_INSN_COST): Define.
* config/arc/arc.md (cost): New attribute.
(add_n): Use arc_nonmemory_operand.
(ashlsi3_insn): Likewise, also update constraints.
(ashrsi3_insn): Likewise.
(rotrsi3): Likewise.
(add_shift): Likewise.
* config/arc/predicates.md (arc_nonmemory_operand): New predicate.

testsuite/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* gcc.target/arc/or-cnst-size2.c: Update test.

4 years ago[ARC] Update mlo/mhi handling when big-endian CPU.
Claudiu Zissulescu [Thu, 13 Feb 2020 10:32:05 +0000 (12:32 +0200)]
[ARC] Update mlo/mhi handling when big-endian CPU.

gcc/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>

* config/arc/arc.md (mulsidi_600): Correctly select mlo/mhi
registers.
(umulsidi_600): Likewise.

testsuite/
xxxx-xx-xx  Claudiu Zissulescu  <claziss@synopsys.com>
Petro Karashchenko  <petro.karashchenko@ring.com>

* estsuite/gcc.target/arc/mul64-1.c: New test.

4 years agoi386: Fix up _mm*_mask_popcnt_epi* [PR93696]
Jakub Jelinek [Thu, 13 Feb 2020 09:43:27 +0000 (10:43 +0100)]
i386: Fix up _mm*_mask_popcnt_epi* [PR93696]

As mentioned in the PR and as
https://software.intel.com/sites/landingpage/IntrinsicsGuide/#text=_mask_popcnt_epi
also documents, _mm*_popcnt_epi* intrinsics are consistent with all other
unary AVX512* intrinsics regarding arguments, i.e. the
_mm*_whatever has just single argument (called a in the docs, and __A in the
GCC headers),
_mm*_mask_whatever has 3 arguments (called src, k, a in the docs and
_W, __U, __A in GCC headers) and
_mm*_maskz_whatever 2 arguments (called k, a in the docs and __U, __A in GCC
headers).  Unfortunately, whomever implemented the _mm*_popcnt_epi*
intrinsics got it wrong for the _mm*_mask_popcnt_epi* ones, calling the
args __A, __U, __B and not passing them in the canonical order to the
builtins, making it API incompatible with ICC as well as clang (tested on
godbolts clang 7/8/9/trunk and ICC 19.0.{0,1}, older clang/ICC don't
understand those, so it isn't that it used to be broken even in other
compilers and got changed afterwards).

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

PR target/93696
* config/i386/avx512bitalgintrin.h (_mm512_mask_popcnt_epi8,
_mm512_mask_popcnt_epi16, _mm256_mask_popcnt_epi8,
_mm256_mask_popcnt_epi16, _mm_mask_popcnt_epi8,
_mm_mask_popcnt_epi16): Rename __B argument to __A and __A to __W,
pass __A to the builtin followed by __W instead of __A followed by
__B.
* config/i386/avx512vpopcntdqintrin.h (_mm512_mask_popcnt_epi32,
_mm512_mask_popcnt_epi64): Likewise.
* config/i386/avx512vpopcntdqvlintrin.h (_mm_mask_popcnt_epi32,
_mm256_mask_popcnt_epi32, _mm_mask_popcnt_epi64,
_mm256_mask_popcnt_epi64): Likewise.

* gcc.target/i386/pr93696-1.c: New test.
* gcc.target/i386/pr93696-2.c: New test.
* gcc.target/i386/avx512bitalg-vpopcntw-1.c (TEST): Fix argument order
of _mm*_mask_popcnt_*.
* gcc.target/i386/avx512vpopcntdq-vpopcntq-1.c (TEST): Likewise.
* gcc.target/i386/avx512vpopcntdq-vpopcntd-1.c (TEST): Likewise.
* gcc.target/i386/avx512bitalg-vpopcntb-1.c (TEST): Likewise.
* gcc.target/i386/avx512bitalg-vpopcntb.c (foo): Likewise.
* gcc.target/i386/avx512bitalg-vpopcntbvl.c (foo): Likewise.
* gcc.target/i386/avx512vpopcntdq-vpopcntd.c (foo): Likewise.
* gcc.target/i386/avx512bitalg-vpopcntwvl.c (foo): Likewise.
* gcc.target/i386/avx512bitalg-vpopcntw.c (foo): Likewise.
* gcc.target/i386/avx512vpopcntdq-vpopcntq.c (foo): Likewise.

4 years agoAdd ChangeLog entry for my last commit
Frederik Harwath [Thu, 13 Feb 2020 09:24:39 +0000 (10:24 +0100)]
Add ChangeLog entry for my last commit

4 years agoopenmp: ignore nowait if async execution is unsupported [PR93481]
Frederik Harwath [Thu, 13 Feb 2020 06:30:16 +0000 (07:30 +0100)]
openmp: ignore nowait if async execution is unsupported [PR93481]

An OpenMP "nowait" clause on a target construct currently leads to
a call to GOMP_OFFLOAD_async_run in the plugin that is used for
offloading at execution time. The nvptx plugin contains only a stub
of this function that always produces a fatal error if called.

This commit changes the "nowait" implementation to ignore the clause
if the executing device's plugin does not implement GOMP_OFFLOAD_async_run.
The stub in the nvptx plugin is removed which effectively means that
programs containing "nowait" can now be executed with nvptx offloading
as if the clause had not been used.
This behavior is consistent with the OpenMP specification which says that
"[...] execution of the target task *may* be deferred" (emphasis added),
cf. OpenMP 5.0, page 172.

libgomp/

* plugin/plugin-nvptx.c: Remove GOMP_OFFLOAD_async_run stub.
* target.c (gomp_load_plugin_for_device): Make "async_run" loading
optional.
(gomp_target_task_fn): Assert "devicep->async_run_func".
(clear_unsupported_flags): New function to remove unsupported flags
(right now only GOMP_TARGET_FLAG_NOWAIT) that can be be ignored.
(GOMP_target_ext): Apply clear_unsupported_flags to flags.
* testsuite/libgomp.c/target-33.c:
Remove xfail for offload_target_nvptx.
* testsuite/libgomp.c/target-34.c: Likewise.

4 years agosccvn: Handle bitfields in vn_reference_lookup_3 [PR93582]
Jakub Jelinek [Thu, 13 Feb 2020 09:04:11 +0000 (10:04 +0100)]
sccvn: Handle bitfields in vn_reference_lookup_3 [PR93582]

The following patch is first step towards fixing PR93582.
vn_reference_lookup_3 right now punts on anything that isn't byte aligned,
so to be able to lookup a constant bitfield store, one needs to use
the exact same COMPONENT_REF, otherwise it isn't found.

This patch lifts up that that restriction if the bits to be loaded are
covered by a single store of a constant (keeps the restriction so far
for the multiple store case, can tweak that incrementally, but I think
for bisection etc. it is worth to do it one step at a time).

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

PR tree-optimization/93582
* fold-const.h (shift_bytes_in_array_left,
shift_bytes_in_array_right): Declare.
* fold-const.c (shift_bytes_in_array_left,
shift_bytes_in_array_right): New function, moved from
gimple-ssa-store-merging.c, no longer static.
* gimple-ssa-store-merging.c (shift_bytes_in_array): Move
to gimple-ssa-store-merging.c and rename to shift_bytes_in_array_left.
(shift_bytes_in_array_right): Move to gimple-ssa-store-merging.c.
(encode_tree_to_bitpos): Use shift_bytes_in_array_left instead of
shift_bytes_in_array.
(verify_shift_bytes_in_array): Rename to ...
(verify_shift_bytes_in_array_left): ... this.  Use
shift_bytes_in_array_left instead of shift_bytes_in_array.
(store_merging_c_tests): Call verify_shift_bytes_in_array_left
instead of verify_shift_bytes_in_array.
* tree-ssa-sccvn.c (vn_reference_lookup_3): For native_encode_expr
/ native_interpret_expr where the store covers all needed bits,
punt on PDP-endian, otherwise allow all involved offsets and sizes
not to be byte-aligned.

* gcc.dg/tree-ssa/pr93582-1.c: New test.
* gcc.dg/tree-ssa/pr93582-2.c: New test.
* gcc.dg/tree-ssa/pr93582-3.c: New test.

4 years agotestsuite/93717 fix up gcc.dg/optimize-bswapsi-2.c for BE
Richard Biener [Thu, 13 Feb 2020 08:10:28 +0000 (09:10 +0100)]
testsuite/93717 fix up gcc.dg/optimize-bswapsi-2.c for BE

2020-02-13  Richard Biener  <rguenther@suse.de>

PR testsuite/93717
* gcc.dg/optimize-bswapsi-2.c: Add BE case.

4 years agoi386: Fix k*shift* intrinsics [PR93673]
Jakub Jelinek [Thu, 13 Feb 2020 07:17:07 +0000 (08:17 +0100)]
i386: Fix k*shift* intrinsics [PR93673]

As mentioned in the PR, the intrinsics allow counts from 0 to 255, but
we actually reject values from 128 to 255.  That is because QImode
CONST_INTs can be only -128 to 127.  Fixed by using const_0_to_255_operand
and dropping the modes for the operands with those predicates
(the IL actually contains the CONST_INT which has VOIDmode).

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

PR target/93673
* config/i386/sse.md (k<code><mode>): Drop mode from last operand and
use const_0_to_255_operand predicate instead of immediate_operand.
(avx512dq_fpclass<mode><mask_scalar_merge_name>,
avx512dq_vmfpclass<mode><mask_scalar_merge_name>,
vgf2p8affineinvqb_<mode><mask_name>,
vgf2p8affineqb_<mode><mask_name>): Drop mode from
const_0_to_255_operand predicated operands.

* gcc.target/i386/avx512f-pr93673.c: New test.
* gcc.target/i386/avx512dq-pr93673.c: New test.
* gcc.target/i386/avx512bw-pr93673.c: New test.

4 years agotestsuite: Fix g++.dg/analyzer/pr93212.C with check-c++-all
Jakub Jelinek [Thu, 13 Feb 2020 07:06:51 +0000 (08:06 +0100)]
testsuite: Fix g++.dg/analyzer/pr93212.C with check-c++-all

The test FAILs with c++11:
.../gcc/testsuite/g++.dg/analyzer/pr93212.C:4:1: error: 'lol' function uses 'auto' type specifier without trailing return type
.../gcc/testsuite/g++.dg/analyzer/pr93212.C:4:1: note: deduced return type only available with '-std=c++14' or '-std=gnu++14'

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

* g++.dg/analyzer/pr93212.C: Require c++14 rather than c++11.

4 years agoDaily bump.
GCC Administrator [Thu, 13 Feb 2020 00:16:35 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Fix constexpr if and braced functional cast.
Jason Merrill [Mon, 10 Feb 2020 13:12:07 +0000 (14:12 +0100)]
c++: Fix constexpr if and braced functional cast.

While partially instantiating a generic lambda, we can encounter pack
expansions or constexpr if where we can't actually do the substitution
immediately, and instead remember a partial instantiation context
in *_EXTRA_ARGS.  This includes any local_specializations used in the
pattern or condition.  In this testcase our tree walk wasn't finding the use
of i because we weren't walking into the type of a CONSTRUCTOR.  Fixed by
moving the code for doing that from find_parameter_packs_r into
cp_walk_subtrees.

2020-02-11  Jason Merrill  <jason@redhat.com>

PR c++/92583
PR c++/92654
* tree.c (cp_walk_subtrees): Walk CONSTRUCTOR types here.
* pt.c (find_parameter_packs_r): Not here.

4 years agocoroutines: Update to n4849 allocation/deallocation.
Iain Sandoe [Wed, 12 Feb 2020 15:10:38 +0000 (16:10 +0100)]
coroutines: Update to n4849 allocation/deallocation.

This updates the coroutine frame allocation and deallocation usage to
match n4849.

[dcl.fct.def.coroutine] /9, /10, /12.

9 An implementation may need to allocate additional storage for a coroutine.
This storage is known as the coroutine state and is obtained by calling a
non-array allocation function. The allocation function’s name is looked up
in the scope of the promise type. If this lookup fails, the allocation
function’s name is looked up in the global scope. If the lookup finds an
allocation function in the scope of the promise type, overload resolution
is performed on a function call created by assembling an argument list.
The first argument is the amount of space requested, and has type
std::size_t. The lvalues p1 . . . pn are the succeeding [user's function]
arguments. If no viable function is found, overload resolution is performed
again on a function call created by passing just the amount of space required
as an argument of type std::size_t.

10 The unqualified-id get_return_object_on_allocation_failure is looked up in
the scope of the promise type by class member access lookup. If any
declarations are found, then the result of a call to an allocation function
used to obtain storage for the coroutine state is assumed to return nullptr
if it fails to obtain storage, and if a global allocation function is
selected, the ::operator new(size_t, nothrow_t) form is used. The allocation
function used in this case shall have a non-throwing noexcept-specification.
If the allocation function returns nullptr, the coroutine returns control to
the caller of the coroutine and the return value is obtained by a call to
T::get_return_object_on_allocation_failure(), where T is the promise type.

12 The deallocation function’s name is looked up in the scope of the promise
type. If this lookup fails, the deallocation function’s name is looked up in
the global scope. If deallocation function lookup finds both a usual
deallocation function with only a pointer parameter and a usual deallocation
function with both a pointer parameter and a size parameter, then the
selected deallocation function shall be the one with two parameters.
Otherwise, the selected deallocation function shall be the function with one
parameter. If no usual deallocation function is found, the program is ill-
formed. The selected deallocation function shall be called with the address
of the block of storage to be reclaimed as its first argument. If a
deallocation function with a parameter of type std::size_t is used, the size
of the block is passed as the corresponding argument.

gcc/cp/ChangeLog:

2020-02-12 Iain Sandoe <iain@sandoe.co.uk>

* coroutines.cc (build_actor_fn): Implement deallocation function
selection per n4849, dcl.fct.def.coroutine bullet 12.
(morph_fn_to_coro): Implement allocation function selection per
n4849, dcl.fct.def.coroutine bullets 9 and 10.

2020-02-12 Iain Sandoe <iain@sandoe.co.uk>

* g++.dg/coroutines/coro1-allocators.h: New.
* g++.dg/coroutines/coro-bad-alloc-00-bad-op-new.C: New test.
* g++.dg/coroutines/coro-bad-alloc-01-bad-op-del.C: New test.
* g++.dg/coroutines/coro-bad-alloc-02-no-op-new-nt.C: New test.
* g++.dg/coroutines/torture/alloc-00-gro-on-alloc-fail.C: Use new
coro1-allocators.h header.
* g++.dg/coroutines/torture/alloc-01-overload-newdel.C: Likewise.
* g++.dg/coroutines/torture/alloc-02-fail-new-grooaf-check.C: New.
* g++.dg/coroutines/torture/alloc-03-overload-new-1.C: New test.
* g++.dg/coroutines/torture/alloc-04-overload-del-use-two-args.C:New.

4 years agotestsuite: Fix up gcc.target/powerpc/pr93122.c test
Jakub Jelinek [Wed, 12 Feb 2020 22:18:56 +0000 (23:18 +0100)]
testsuite: Fix up gcc.target/powerpc/pr93122.c test

The recent renaming of PowerPC -mprefixed-addr option to -mprefixed
has not adjusted the gcc.target/powerpc/pr93122.c test, so it now
FAIL: gcc.target/powerpc/pr93122.c (test for excess errors)
Excess errors:
xgcc: error: unrecognized command-line option '-mprefixed-addr'; did you mean '-mprefixed'?

2020-02-12  Jakub Jelinek  <jakub@redhat.com>

* gcc.target/powerpc/pr93122.c: Use -mprefixed instead of
-mprefixed-addr in dg-options.

4 years agoCommit correct version of last patch
Jeff Law [Wed, 12 Feb 2020 21:57:50 +0000 (14:57 -0700)]
Commit correct version of last patch

4 years agoCombine the two H8 mode shortening peepholes into a single peephole
Jeff Law [Wed, 12 Feb 2020 21:52:24 +0000 (14:52 -0700)]
Combine the two H8 mode shortening peepholes into a single peephole

* config/h8300/h8300.md (comparison shortening peepholes): Use
a mode iterator to merge the HImode and SImode peepholes.

4 years agolibstdc++: Fix LWG issues 3389 and 3390
Patrick Palka [Tue, 11 Feb 2020 15:45:26 +0000 (10:45 -0500)]
libstdc++: Fix LWG issues 3389 and 3390

libstdc++-v3/ChangeLog:

LWG 3389 and LWG 3390
* include/bits/stl_iterator.h (move_move_iterator): Use std::move when
constructing the move_iterator with __i.
(counted_iterator::counted_iterator): Use std::move when initializing
M_current with __i.
* testsuite/24_iterators/counted_iterator/lwg3389.cc: New test.
* testsuite/24_iterators/move_iterator/lwg3390.cc: New test.

4 years agoUse a non-empty test program to test ability to link.
Sandra Loosemore [Wed, 12 Feb 2020 20:20:15 +0000 (12:20 -0800)]
Use a non-empty test program to test ability to link.

On bare-metal targets, I/O support is typically provided by a BSP and
requires a linker script and/or hosting library to be specified on the
linker command line.  Linking an empty program with the default linker
script may succeed, however, which confuses libstdc++ configuration
when programs that probe for the presence of various I/O features fail
with link errors.

2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>

PR libstdc++/79193
PR libstdc++/88999

config/
* no-executables.m4: Use a non-empty program to test for linker
support.

libgcc/
* configure: Regenerated.

libgfortran/
* configure: Regenerated.

libiberty/
* configure: Regenerated.

libitm/
* configure: Regenerated.

libobjc/
* configure: Regenerated.

libquadmath/
* configure: Regenerated.

libssp/
* configure: Regenerated.

libstdc++v-3/
* configure: Regenerated.

4 years agoreal: Fix roundeven on inf/nan [PR93663]
Jakub Jelinek [Wed, 12 Feb 2020 21:14:27 +0000 (22:14 +0100)]
real: Fix roundeven on inf/nan [PR93663]

As can be seen in the testcase, roundeven with inf or nan arguments
ICE because of those asserts where nothing prevents from is_halfway_below
being called with those arguments.

The following patch fixes that by just returning false for rvc_inf/rvc_nan
like it returns for rvc_zero, so that we handle roundeven with all those
values as round.  Inf/NaN are not halfway in between two integers...

2020-02-12  Jakub Jelinek  <jakub@redhat.com>

PR middle-end/93663
* real.c (is_even): Make static.  Function comment fix.
(is_halfway_below): Make static, don't assert R is not inf/nan,
instead return false for those.  Small formatting fixes.

* gcc.dg/torture/builtin-round-roundeven.c (main): Add tests
for DBL_MAX, inf, their negations and nan.

4 years agolibstdc++: Add missing std:: qualification of a forward call
François Dumont [Tue, 11 Feb 2020 18:09:48 +0000 (19:09 +0100)]
libstdc++: Add missing std:: qualification of a forward call

* include/bits/hashtable.h
(_Hashtable<>(_Hashtable&&, std::allocator_type&)): Add
missing std namespace qualification to forward call.

4 years agoPR middle-end/93646 - confusing -Wstringop-truncation on strncat where -Wstringop...
Martin Sebor [Wed, 12 Feb 2020 20:53:49 +0000 (13:53 -0700)]
PR middle-end/93646 - confusing -Wstringop-truncation on strncat where -Wstringop-overflow is expected

gcc/ChangeLog:

PR middle-end/93646
* tree-ssa-strlen.c (handle_builtin_stxncpy): Rename...
(handle_builtin_stxncpy_strncat): ...to this.  Change first argument.
Issue only -Wstringop-overflow strncat, never -Wstringop-truncation.
(strlen_check_and_optimize_call): Adjust callee name.

gcc/testsuite/ChangeLog:

PR middle-end/93646
* gcc.dg/Wstringop-overflow-31.c: New test.

4 years agoDrop unused comparison shortening pattern and consolidate remaining comparison shorte...
Jeff Law [Wed, 12 Feb 2020 19:12:22 +0000 (12:12 -0700)]
Drop unused comparison shortening pattern and consolidate remaining comparison shortening patterns.

* config/h8300/h8300.md (comparison shortening peepholes): Drop
(and (xor)) variant.  Combine other two into single peephole.

4 years ago[AArch64] Set ctz rtx_cost (PR93565)
Wilco Dijkstra [Wed, 12 Feb 2020 18:23:21 +0000 (18:23 +0000)]
[AArch64] Set ctz rtx_cost (PR93565)

Combine sometimes behaves oddly and duplicates ctz to remove an unnecessary
sign extension.  Avoid this by setting the cost for ctz to be higher than
that of a simple ALU instruction.  Deepsjeng performance improves by ~0.6%.

gcc/
PR rtl-optimization/93565
* config/aarch64/aarch64.c (aarch64_rtx_costs): Add CTZ costs.

testsuite/
PR rtl-optimization/93565
* gcc.target/aarch64/pr93565.c: New test.

4 years ago[AArch64] Improve popcount expansion
Wilco Dijkstra [Wed, 12 Feb 2020 18:19:25 +0000 (18:19 +0000)]
[AArch64] Improve popcount expansion

The popcount expansion uses umov to extend the result and move it back
to the integer register file.  If we model ADDV as a zero-extending
operation, fmov can be used to move back to the integer side. This
results in a ~0.5% speedup on deepsjeng on Cortex-A57.

A typical __builtin_popcount expansion is now:

fmov s0, w0
cnt v0.8b, v0.8b
addv b0, v0.8b
fmov w0, s0

gcc/
* config/aarch64/aarch64-simd.md
(aarch64_zero_extend<GPI:mode>_reduc_plus_<VDQV_E:mode>): New pattern.
* config/aarch64/aarch64.md (popcount<mode>2): Use it instead of
generating separate ADDV and zero_extend patterns.
* config/aarch64/iterators.md (VDQV_E): New iterator.

testsuite/
* gcc.target/aarch64/popcnt2.c: New test.

4 years agoClean up dead patterns, splitters, expanders and peepholes on the H8 port.
Jeff Law [Wed, 12 Feb 2020 17:35:12 +0000 (10:35 -0700)]
Clean up dead patterns, splitters, expanders and peepholes on the H8 port.

* config/h8300/h8300.md (cpymemsi, movmd): Remove dead patterns,
expanders, splits, etc.
(movmd_internal_<mode>, movmd splitter, movstr, movsd): Likewise.
(stpcpy_internal_<mode>, stpcpy splitter): Likewise.
(peepholes to convert QI/HI mode pushes to SI mode pushes): Likewise.
* config/h8300/h8300.c (h8300_swap_into_er6): Remove unused function.
(h8300_swap_out_of_er6, h8sx_emit_movmd): Likewise
* config/h8300/h8300-protos.h (h8300_swap_into_er6): Remove unused
function prototype.
(h8300_swap_out_of_er6, h8sx_emit_movmd): Likewise.

4 years agoc++: Add new test [PR88819]
Marek Polacek [Wed, 12 Feb 2020 16:20:07 +0000 (11:20 -0500)]
c++: Add new test [PR88819]

Fixed by r10-1975-g59febe0ece37bedab7f42ae51b9f2b7a372d2950.

2020-02-12  Marek Polacek  <polacek@redhat.com>

PR c++/88819
* g++.dg/cpp2a/nontype-class32.C: New test.

4 years agoc++: Fix ICE-on-invalid with broken attribute [PR93684]
Marek Polacek [Tue, 11 Feb 2020 20:29:24 +0000 (15:29 -0500)]
c++: Fix ICE-on-invalid with broken attribute [PR93684]

We crash when parsing

  [[a::

because we see a CPP_SCOPE and then we're trying to consume a CPP_EOF
token.  So peek before consuming it.

PR c++/93684 - ICE-on-invalid with broken attribute.
* parser.c (cp_parser_std_attribute): Peek a token first before
consuming it.

* g++.dg/parse/attr4.C: New test.

4 years agoi386: Fix up vec_extract_lo* patterns [PR93670]
Jakub Jelinek [Wed, 12 Feb 2020 10:58:35 +0000 (11:58 +0100)]
i386: Fix up vec_extract_lo* patterns [PR93670]

The VEXTRACT* insns have way too many different CPUID feature flags (ATT
syntax)
vextractf128 $imm, %ymm, %xmm/mem AVX
vextracti128 $imm, %ymm, %xmm/mem AVX2
vextract{f,i}32x4 $imm, %ymm, %xmm/mem {k}{z} AVX512VL+AVX512F
vextract{f,i}32x4 $imm, %zmm, %xmm/mem {k}{z} AVX512F
vextract{f,i}64x2 $imm, %ymm, %xmm/mem {k}{z} AVX512VL+AVX512DQ
vextract{f,i}64x2 $imm, %zmm, %xmm/mem {k}{z} AVX512DQ
vextract{f,i}32x8 $imm, %zmm, %ymm/mem {k}{z} AVX512DQ
vextract{f,i}64x4 $imm, %zmm, %ymm/mem {k}{z} AVX512F

As the testcase shows and the patch too, we didn't get it right in all
cases.

The first hunk is about avx512vl_vextractf128v8s[if] incorrectly
requiring TARGET_AVX512DQ.  The corresponding insn is the first
vextract{f,i}32x4 above, so it requires VL+F, and the builtins have it
correct (TARGET_AVX512VL implies TARGET_AVX512F):
BDESC (OPTION_MASK_ISA_AVX512VL, 0, CODE_FOR_avx512vl_vextractf128v8sf, "__builtin_ia32_extractf32x4_256_mask", IX86_BUILTIN_EXTRACTF32X4_256, UNKNOWN, (int) V4SF_FTYPE_V8SF_INT_V4SF_UQI)
BDESC (OPTION_MASK_ISA_AVX512VL, 0, CODE_FOR_avx512vl_vextractf128v8si, "__builtin_ia32_extracti32x4_256_mask", IX86_BUILTIN_EXTRACTI32X4_256, UNKNOWN, (int) V4SI_FTYPE_V8SI_INT_V4SI_UQI)
We only need TARGET_AVX512DQ for avx512vl_vextractf128v4d[if].

The second hunk is about vec_extract_lo_v16s[if]{,_mask}.  These are using
the vextract{f,i}32x8 insns (AVX512DQ above), but we weren't requiring that,
but instead incorrectly && 1 for non-masked and && (64 == 64 && TARGET_AVX512VL)
for masked insns.  This is extraction from ZMM, so it doesn't need VL for
anything.  The hunk actually only requires TARGET_AVX512DQ when the insn
is masked, if it is not masked, when TARGET_AVX512DQ isn't available we can
use vextract{f,i}64x4 instead which is available already in TARGET_AVX512F
and does the same thing, extracts the low 256 bits from 512 bits vector
(often we split it into just nothing, but there are some special cases like
when using xmm16+ when we can't without AVX512VL).

The last hunk is about vec_extract_lo_v8s[if]{,_mask}.  The non-_mask
suffixed ones are ok already and just split into nothing (lowpart subreg).
The masked ones were incorrectly requiring TARGET_AVX512VL and
TARGET_AVX512DQ, when we only need TARGET_AVX512VL.

2020-02-12  Jakub Jelinek  <jakub@redhat.com>

PR target/93670
* config/i386/sse.md (VI48F_256_DQ): New mode iterator.
(avx512vl_vextractf128<mode>): Use it instead of VI48F_256.  Remove
TARGET_AVX512DQ from condition.
(vec_extract_lo_<mode><mask_name>): Use <mask_avx512dq_condition>
instead of <mask_mode512bit_condition> in condition.  If
TARGET_AVX512DQ is false, emit vextract*64x4 instead of
vextract*32x8.
(vec_extract_lo_<mode><mask_name>): Drop <mask_avx512dq_condition>
from condition.

* gcc.target/i386/avx512vl-pr93670.c: New test.

4 years agotestsuite/93697 fix inconsistent warning in testcase
Richard Biener [Wed, 12 Feb 2020 09:03:09 +0000 (10:03 +0100)]
testsuite/93697 fix inconsistent warning in testcase

The warning was emitted inconsistently on targets, so disable it since
the testcase was for an ICE.

2020-02-12  Richard Biener  <rguenther@suse.de>

PR testsuite/93697
* gcc.dg/pr93661.c: Pass -w, remove dg-warning.

4 years ago[IRA] Fix PR91052 by skipping multiple_sets insn in combine_and_move_insns
Kewen Lin [Wed, 12 Feb 2020 05:22:02 +0000 (23:22 -0600)]
[IRA] Fix PR91052 by skipping multiple_sets insn in combine_and_move_insns

As PR91052's comments show, commit r272731 exposed one issue in function
combine_and_move_insns.  Function combine_and_move_insns perform the
unexpected movement which alter live interval of some register, leading
incorrect value to be used.  See PR91052 for details.

2020-02-12  Kewen Lin  <linkw@gcc.gnu.org>
    PR target/91052
    * ira.c (combine_and_move_insns): Skip multiple_sets def_insn.

4 years agoanalyzer: use ultimate alias target at calls (PR 93288)
David Malcolm [Thu, 6 Feb 2020 02:29:04 +0000 (21:29 -0500)]
analyzer: use ultimate alias target at calls (PR 93288)

PR analyzer/93288 reports an ICE in a C++ testcase when calling a
constructor.

The issue is that when building the supergraph, we encounter the
cgraph edge to "__ct_comp ", the DECL_COMPLETE_CONSTRUCTOR_P, and
this node's DECL_STRUCT_FUNCTION has a NULL CFG, which the analyzer
reads through, leading to the ICE.

This patch reworks function and fndecl lookup at calls throughout the
analyzer so that it looks for the ultimate_alias_target of the callee.
In the case above, this means using the "__ct_base " for the ctor,
which has a CFG, fixing the ICE.

Getting this right allows for some simple C++ cases involving ctors to
work, so the patch also adds some test coverage for that.

gcc/analyzer/ChangeLog:
PR analyzer/93288
* analysis-plan.cc (analysis_plan::use_summary_p): Look through
the ultimate_alias_target when getting the called function.
* engine.cc (exploded_node::on_stmt): Rename second "ctxt" to
"sm_ctxt".  Use the region_model's get_fndecl_for_call rather than
gimple_call_fndecl.
* region-model.cc (region_model::get_fndecl_for_call): Use
ultimate_alias_target on fndecl.
* supergraph.cc (get_ultimate_function_for_cgraph_edge): New
function.
(supergraph_call_edge): Use it when rejecting edges without
functions.
(supergraph::supergraph): Use it to get the function for the
cgraph_edge when building interprocedural superedges.
(callgraph_superedge::get_callee_function):  Use it.
* supergraph.h (supergraph::get_num_snodes): Make param const.
(supergraph::function_to_num_snodes_t): Make first type param
const.

gcc/testsuite/ChangeLog:
PR analyzer/93288
* g++.dg/analyzer/malloc.C: Add test coverage for a double-free
called in a constructor.
* g++.dg/analyzer/pr93288.C: New test.

4 years agors6000: Use strlen instead of sizeof - 1
Segher Boessenkool [Tue, 11 Feb 2020 02:20:56 +0000 (02:20 +0000)]
rs6000: Use strlen instead of sizeof - 1

It is easier to read and understand  strlen ("string")  than it is to
read and understand  sizeof ("string") - 1  .

* config/rs6000/rs6000.c (rs6000_debug_print_mode): Don't use sizeof
where strlen is more legible.
(rs6000_builtin_vectorized_libmass): Ditto.
(rs6000_print_options_internal): Ditto.

4 years agoanalyzer: g++ testsuite support
David Malcolm [Thu, 21 Nov 2019 17:30:45 +0000 (12:30 -0500)]
analyzer: g++ testsuite support

PR analyzer/93288 reports a C++-specific ICE with -fanalyzer.

This patch creates the beginnings of a C++ test suite for the analyzer,
so that there's a place to put test coverage for the fix.
It adds a regression test for PR analyzer/93212, an ICE fixed
in r10-5970-g32077b693df8e3ed0424031a322df23822bf2f7e.

gcc/testsuite/ChangeLog:
PR analyzer/93212
* g++.dg/analyzer/analyzer.exp: New subdirectory and .exp suite.
* g++.dg/analyzer/malloc.C: New test.
* g++.dg/analyzer/pr93212.C: New test.

4 years agoDaily bump.
GCC Administrator [Wed, 12 Feb 2020 00:16:40 +0000 (00:16 +0000)]
Daily bump.

4 years agoc++: Fix implicit friend operator==.
Jason Merrill [Tue, 11 Feb 2020 11:04:37 +0000 (12:04 +0100)]
c++: Fix implicit friend operator==.

It seems that in writing testcases for the operator<=> proposal I didn't
include any tests for implicitly declared friend operator==, and
consequently it didn't work.

2020-02-11  Jason Merrill  <jason@redhat.com>

PR c++/93675
* class.c (add_implicitly_declared_members): Use do_friend.
* method.c (implicitly_declare_fn): Fix friend handling.
(decl_remember_implicit_trigger_p): New.
(synthesize_method): Use it.
* decl2.c (mark_used): Use it.

4 years agoPR tree-optimization/93683 - ICE on calloc with unused return value in ao_ref_init_fr...
Martin Sebor [Tue, 11 Feb 2020 23:53:13 +0000 (16:53 -0700)]
PR tree-optimization/93683 - ICE on calloc with unused return value in ao_ref_init_from_ptr_and_size

gcc/testsuite/ChangeLog:

PR tree-optimization/93683
* gcc.dg/tree-ssa/ssa-dse-39.c: New test.

gcc/ChangeLog:

PR tree-optimization/93683
* tree-ssa-alias.c (stmt_kills_ref_p): Avoid using LHS when not set.

4 years agoAdd ppc_ieee128_ok target-supports proc
Will Schmidt [Tue, 11 Feb 2020 20:01:59 +0000 (14:01 -0600)]
Add ppc_ieee128_ok target-supports proc

  Add a target_supports entry to check that the __ieee128 keyword
is understood by the target.
Also add a dg-requires check to the existing pr92796 testcase.

    [testsuite]
* lib/target-supports.exp (check_effective_target_ppc_ieee128_ok): New.
* gcc.target/powerpc/pr92796.c: Add a require-effective-target
statement for ppc_ieee128_ok.