The pthread_cond_clockwait function is available in glibc since the 2.30
release. If this function is available in the C library it can be used
to fix PR libstdc++/41861 by supporting std::chrono::steady_clock
properly with std::condition_variable.

This means that code using std::condition_variable::wait_for or
std::condition_variable::wait_until with std::chrono::steady_clock is no
longer subject to timing out early or potentially waiting for much
longer if the system clock is warped at an inopportune moment.

If pthread_cond_clockwait is available then std::chrono::steady_clock is
deemed to be the "best" clock available which means that it is used for
the relative wait_for calls and absolute wait_until calls using
user-defined clocks. Calls explicitly using std::chrono::system_clock
continue to use CLOCK_REALTIME via __gthread_cond_timedwait.

If pthread_cond_clockwait is not available then
std::chrono::system_clock is deemed to be the "best" clock available
which means that the previous suboptimal behaviour remains.

2019-09-04  Mike Crowe  <mac@mcrowe.com>

	PR libstdc++/41861
	* acinclude.m4 (GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT): Check for new
	pthread_cond_clockwait function.
	* configure.ac: Use GLIBCXX_CHECK_PTHREAD_COND_CLOCKWAIT.
	* configure: Regenerate.
	* config.h.in: Regenerate.
	* include/std/condition_variable: (condition_variable): Rename
	__steady_clock_t typedef and add system_clock. Change __clock_t to be
	a typedef for the preferred clock to convert arbitrary other clocks to.
	[_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (wait_until): Add a steady_clock
	overload.
	(wait_until): Change __clock_t overload to use system_clock.
	[_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT] (__wait_until_impl): Add
	steady_clock overload that calls pthread_cond_clockwait.
	(__wait_until_impl): Change __clock_t overload to use system_clock.
	(condition_variable_any) [_GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT]: Use
	steady_clock for __clock_t if pthread_cond_clockwait is available.

From-SVN: r275390

2019-09-04  Mike Crowe  <mac@mcrowe.com>

	* testsuite/30_threads/condition_variable/members/2.cc (test01):
	Parameterise so that test can be run against an arbitrary clock.
	(main): Test using std::chrono::steady_clock and a user-defined
	clock in addition to the previous std::chrono::system_clock.
	* testsuite/30_threads/condition_variable_any/members/2.cc: Likewise.

From-SVN: r275389

Vtable verification currently does not work properly with
link time optimization.  Until this can be fixed users should
not be allowed to specify both options together.

2019-09-04  Caroline Tice  <cmtice@google.com>
 
        *  opts.c (finish_options):  Disallow -fvtable-verify and -flto to be
           specified together.

From-SVN: r275388

From-SVN: r275387

	PR target/32413
	* config/i386/i386.c (inline_secondary_memory_needed): Return true
	for QI and HImode moves between SSE and general registers.

From-SVN: r275377

The patch enables warning with Wextra due to PR91593 and warnings with
allmodconfig kernel build. Once these issues are resolved, we could
consider promoting it to Wall.

2019-09-04  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	PR c/78736
	* doc/invoke.texi: Document -Wenum-conversion.

c-family
	* c.opt (Wenum-conversion): New option.

c/
	* c-typeck.c (convert_for_assignment): Handle Wenum-conversion.

testsuite/
	* gcc.dg/Wenum-conversion.c: New test-case.

From-SVN: r275376

2019-09-04  Martin Liska  <mliska@suse.cz>

	* mklog: Do not print changed functions for
	testsuite files.

From-SVN: r275369

2019-09-04  Martin Liska  <mliska@suse.cz>

	* mklog: Parse PR references from newly added
	test files.

From-SVN: r275368

2019-09-04  Martin Liska  <mliska@suse.cz>

	* mklog: Use argparse instead of getopt.

From-SVN: r275367

2019-09-04  Richard Biener  <rguenther@suse.de>

	PR rtl-optimization/36262
	* postreload-gcse.c: Include intl.h and gcse.h.
	(insert_expr_in_table): Insert at the head of cur_expr->avail_occr
	to avoid linear list walk.
	(record_last_mem_set_info): Gate off if not computing transparentness.
	(get_bb_avail_insn): If transparentness isn't computed give up
	early.
	(gcse_after_reload_main): Skip compute_transp and extended PRE
	if gcse_or_cprop_is_too_expensive says so.

From-SVN: r275365

2019-09-03  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.texi: Update documentation to catch up with BOZ changes.
	* invoke.texi: Fix English from previous BOZ changes commit.

From-SVN: r275364

From-SVN: r275362

    
    If we dot-import a package, we should only add an imported variable to
    the package bindings if the variable is in the package being imported.
    A test case for this is the 1.13 os package, in which ErrClosed and
    friends are defined both locally and in the imported internal/oserror package.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/192718

From-SVN: r275358

2019-09-03  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* config/msp430/msp430.c (msp430_init_sections): Remove handling of the
	noinit section.
	(msp430_select_section): Handle decls with the "noinit" attribute with
	default_elf_select_section.
	Handle SECCAT_RODATA_MERGE_* section types with
	default_elf_select_section.
	Add comments about handling of unsupported section types.
	(msp430_section_type_flags): Remove handling of the noinit section.

From-SVN: r275357

gcc/ChangeLog:

2019-09-03  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* config/msp430/msp430.c (msp430_attr): Remove warnings about
	conflicting msp430-specific attributes.
	(msp430_section_attr): Likewise.
	Add warnings about conflicts with generic "noinit" and "section"
	attributes.
	Fix grammar in -mlarge error message.
	(msp430_data_attr): Rename to msp430_persist_attr.
	Add warnings about conflicts with generic "noinit" and "section"
	attributes.
	Add warning for when variable is not initialized.
	Chain conditionals which prevent the attribute being added.
	(ATTR_EXCL): New helper.
	(attr_reent_exclusions): New exclusion table.
	(attr_naked_exclusions): Likewise.
	(attr_crit_exclusions): Likewise.
	(attr_lower_exclusions): Likewise.
	(attr_upper_exclusions): Likewise.
	(attr_either_exclusions): Likewise.
	(attr_persist_exclusions): Likewise.
	(msp430_attribute_table): Update with exclusion rules.
	(msp430_output_aligned_decl_common): Don't output common symbol if decl
	has a section.

gcc/testsuite/ChangeLog:

2019-09-03  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* gcc.target/msp430/data-attributes-2.c: New test.
	* gcc.target/msp430/function-attributes-4.c: Update dg-warning
	strings.
	* gcc.target/msp430/region-attribute-misuse.c: Likewise.

From-SVN: r275356

gcc/ChangeLog:

2019-09-03  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* config/msp430/msp430.c (TARGET_HANDLE_GENERIC_ATTRIBUTE): Define.
	(msp430_handle_generic_attribute): New function.
	* doc/tm.texi: Regenerate.
	* doc/tm.texi.in: Add TARGET_HANDLE_GENERIC_ATTRIBUTE.
	* hooks.c (hook_tree_treeptr_tree_tree_int_boolptr_null): New.
	* hooks.h (hook_tree_treeptr_tree_tree_int_boolptr_null): New.
	* target.def: Define new hook TARGET_HANDLE_GENERIC_ATTRIBUTE.

gcc/c-family/ChangeLog:

2019-09-03  Jozef Lawrynowicz  <jozef.l@mittosystems.com>

	* c-attribs.c (handle_section_attribute): Call the
	handle_generic_attribute target hook after performing target
	independent processing.
	(handle_noinit_attribute): Likewise.

From-SVN: r275355

	PR tree-optimization/91504
	* match.pd: Add ((~a & b) ^a) --> (a | b).

        PR tree-optimization/91504
	gcc.dg/tree-ssa/pr91504.c: New test.

From-SVN: r275354

	* rust-demangle.c (unescape): Remove.
	(parse_lower_hex_nibble): New function.
	(parse_legacy_escape): New function.
	(is_prefixed_hash): Use parse_lower_hex_nibble.
	(looks_like_rust): Use parse_legacy_escape.
	(rust_demangle_sym): Use parse_legacy_escape.
	* testsuite/rust-demangle-expected: Add 'llv$u6d$' test.

From-SVN: r275353

	* c-cppbuiltin.c (builtin_define_with_hex_fp_value): Always expand
	when using -fgo-dump-spec.

From-SVN: r275352

	PR target/91604
	* config/i386/i386-expand.c (split_double_mode): If there is more than
	one MEM operand and they are rtx_equal_p, reuse lo_half/hi_half from
	already split matching MEM operand instead of calling adjust_address
	again.

	* gcc.target/i386/pr91604.c: New test.

From-SVN: r275344

From-SVN: r275343

2019-09-03  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/91603
        PR middle-end/91612
        PR middle-end/91613
        * expr.c (expand_expr_real_1): Handle unaligned decl_rtl
        and SSA_NAME referring to CONSTANT_P correctly.

testsuite:
2019-09-03  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/91603
        * testsuite/gcc.target/arm/pr91603.c: New test.

From-SVN: r275342

2019-09-03  Chung-Lin Tang <cltang@codesourcery.com>

	libatomic/
	PR other/79543
	* acinclude.m4 (LIBAT_CHECK_LINKER_FEATURES): Fix GNU ld --version
	scanning to conform to the GNU Coding Standards.
	* configure: Regenerate.

	libffi/
	PR other/79543
	* acinclude.m4 (LIBAT_CHECK_LINKER_FEATURES): Fix GNU ld --version
	scanning to conform to the GNU Coding Standards.
	* configure: Regenerate.

	libgomp/
	PR other/79543
	* acinclude.m4 (LIBGOMP_CHECK_LINKER_FEATURES): Fix GNU ld --version
	scanning to conform to the GNU Coding Standards.
	* configure: Regenerate.

	libitm/
	PR other/79543
	* acinclude.m4 (LIBITM_CHECK_LINKER_FEATURES): Fix GNU ld --version
	scanning to conform to the GNU Coding Standards.
	* configure: Regenerate.

	libstdc++-v3/
	PR other/79543
	* acinclude.m4 (GLIBCXX_CHECK_LINKER_FEATURES): Fix GNU ld --version
	scanning to conform to the GNU Coding Standards.
	* configure: Regenerate.

From-SVN: r275341

2019-09-03  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.h (vn_nary_op_lookup): Remove.
	(vn_nary_op_insert): Likewise.
	* tree-ssa-sccvn.c (init_vn_nary_op_from_op): Remove.
	(vn_nary_op_lookup): Likewise.
	(vn_nary_op_insert): Likewise.

From-SVN: r275338

gcc/testsuite/ChangeLog:

2019-09-03  Ilya Leoshkevich  <iii@linux.ibm.com>

	* gcc.target/s390/sigfpe-eh.c: Forgotten test.

From-SVN: r275337

The new sigfpe-eh.c fails with

    internal compiler error: RTL check: expected elt 0 type 'e' or 'u', have 'w' (rtx const_int)

This is most likely due to a typo: XEXP (*op1, 0) was used, when
XEXP (*op0, 1) was intended.  This did not cause any user-visible
problems, because reversed_comparison_code_parts ignores the
respective argument, and the release compiler is built without RTL
checks.

gcc/ChangeLog:

2019-09-03  Ilya Leoshkevich  <iii@linux.ibm.com>

	* config/s390/s390.c (s390_canonicalize_comparison): Use XEXP
	(*op0, 1) instead of XEXP (*op1, 0).

gcc/testsuite/ChangeLog:

2019-09-03  Ilya Leoshkevich  <iii@linux.ibm.com>

	* gcc.target/s390/sigfpe-eh.c: New test.

From-SVN: r275336

This patch implements the __jcvt ACLE intrinsic [1] that maps down to the FJCVTZS [2] instruction from Armv8.3-a.
No fancy mode iterators or nothing. Just a single builtin, UNSPEC and define_insn and the associate plumbing.
This patch also defines __ARM_FEATURE_JCVT to indicate when the intrinsic is available.

[1] https://developer.arm.com/docs/101028/latest/data-processing-intrinsics
[2] https://developer.arm.com/docs/ddi0596/latest/simd-and-floating-point-instructions-alphabetic-order/fjcvtzs-floating-point-javascript-convert-to-signed-fixed-point-rounding-toward-zero

	* config/aarch64/aarch64.md (UNSPEC_FJCVTZS): Define.
	(aarch64_fjcvtzs): New define_insn.
	* config/aarch64/aarch64.h (TARGET_JSCVT): Define.
	* config/aarch64/aarch64-builtins.c (aarch64_builtins):
	Add AARCH64_JSCVT.
	(aarch64_init_builtins): Initialize __builtin_aarch64_jcvtzs.
	(aarch64_expand_builtin): Handle AARCH64_JSCVT.
	* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
	__ARM_FEATURE_JCVT where appropriate.
	* config/aarch64/arm_acle.h (__jcvt): Define.

	* gcc.target/aarch64/acle/jcvt_1.c: New test.

From-SVN: r275335

This patch implements the ACLE intrinsics to access the FRINT[32,64][Z,X] scalar[1] and vector[2][3] instructions
from Armv8.5-a. These are enabled when the __ARM_FEATURE_FRINT macro is defined.

They're added in a fairly standard way through builtins and unspecs at the RTL level.

	* config/aarch64/aarch64.md ("unspec"): Add UNSPEC_FRINT32Z,
	UNSPEC_FRINT32X, UNSPEC_FRINT64Z, UNSPEC_FRINT64X.
	(aarch64_<frintnzs_op><mode>): New define_insn.
	* config/aarch64/aarch64.h (TARGET_FRINT): Define.
	* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
	__ARM_FEATURE_FRINT when appropriate.
	* config/aarch64/aarch64-simd-builtins.def: Add builtins for frint32z,
	frint32x, frint64z, frint64x.
	* config/aarch64/arm_acle.h (__rint32zf, __rint32z, __rint64zf,
	__rint64z, __rint32xf, __rint32x, __rint64xf, __rint64x): Define.
	* config/aarch64/arm_neon.h (vrnd32z_f32, vrnd32zq_f32, vrnd32z_f64,
	vrnd32zq_f64, vrnd32x_f32, vrnd32xq_f32, vrnd32x_f64, vrnd32xq_f64,
	vrnd64z_f32, vrnd64zq_f32, vrnd64z_f64, vrnd64zq_f64, vrnd64x_f32,
	vrnd64xq_f32, vrnd64x_f64, vrnd64xq_f64): Define.
	* config/aarch64/iterators.md (VSFDF): Define.
	(FRINTNZX): Likewise.
	(frintnzs_op): Likewise.

	* gcc.target/aarch64/acle/rintnzx_1.c: New test.
	* gcc.target/aarch64/simd/vrndnzx_1.c: Likewise.

From-SVN: r275334

This patch adds '-mcpu' options for following CPUs:
Cortex-A77, Cortex-A76AE, Cortex-A65, Cortex-A65AE, and Cortex-A34.

Related specifications are as following:
https://developer.arm.com/ip-products/processors/cortex-a

Bootstraped/regtested for aarch64-none-linux-gnu.

2019-09-03  Dennis Zhang  <dennis.zhang@arm.com>

	* config/aarch64/aarch64-cores.def (AARCH64_CORE): New entries
	for Cortex-A77, Cortex-A76AE, Cortex-A65, Cortex-A65AE, and
	Cortex-A34.
	* config/aarch64/aarch64-tune.md: Regenerated.
	* doc/invoke.texi: Document the new processors.

From-SVN: r275333

2019-09-03  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * testsuite/lib/libphobos.exp (libphobos_init): Add multi-lib libgcc 
        dirs to the ld_library_path var.

From-SVN: r275332

This patch adds feature strings for some of the extensions. This string is what is read from /proc/cpuinfo on Linux systems
and used during -march=native detection.

The strings are taken from the kernel source tree at:
https://github.com/torvalds/linux/blob/master/arch/arm64/kernel/cpuinfo.c#L45


	* config/aarch64/aarch64-option-extensions.def (sb): Add feature
	string.
	(ssbs): Likewise.
	(sve2): Likewise.
	(sve2-sm4): Likewise.
	(sveaes): Likewise.
	(svesha3): Likewise.
	(svebitperm): Likewise.

From-SVN: r275331

	PR tree-optimization/91597
	* tree-vrp.c (extract_range_from_binary_expr): Remove unsafe
	BIT_AND_EXPR optimization for pointers, even if both operand
	ranges don't include NULL, the result can be NULL.

	* gcc.c-torture/execute/pr91597.c: New test.

Co-Authored-By: Richard Biener <rguenther@suse.de>

From-SVN: r275330

This test uses a call-saved register as a global variable.  It
attempts to preserve its value across main, but only the lower int
part is preserved, which is not good enough for x86_64, when the
runtime that calls main() happens to hold something in the chosen
register that is not a zero-extension from the 32-bit value, and
rightfully expects the full register to remain unchanged when main()
returns.


for  gcc/testsuite/ChangeLog

	* gcc.target/i386/20020616-1.c: Preserve full register across
	main.

From-SVN: r275329

From-SVN: r275328

2019-09-02  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91589
	* primary.c (gfc_match_varspec): Return MATCH_NO on an apparent
	component ref, when the primary type is intrinsic.

2019-09-02  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/91589
	* gfortran.dg/pr91589.f90 : New test.

From-SVN: r275324

2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>

	PR fortran/91552
	* array.c (walk_array_constructor): New function.
	(gfc_match_array_constructor): Use it.

2019-09-02  Steven G. Kargl  <kargl@gc.gnu.org>

	PR fortran/91552
	* gfortran.dg/pr91552.f90: New test.

From-SVN: r275322

re PR middle-end/91605 (ICE in ix86_avx256_split_vector_move_misalign, at config/i386/i386-expand.c:489 since r274986)

2019-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/91605
        * expr.c (addr_expr_of_non_mem_decl_p_1): Refactor into...
        (non_mem_decl_p): ...this.
        (mem_ref_refers_to_non_mem_p): Handle DECL_P as well ase MEM_REF.
        (expand_assignment): Call mem_ref_referes_to_non_mem_p
        unconditionally as before.

testsuite:
2019-09-02  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        PR middle-end/91605
        * g++.target/i386/pr91605.C: New test.

From-SVN: r275320

	PR tree-optimization/91632
	* gcc.c-torture/execute/pr91632.c: New test.

From-SVN: r275318

	* vim-gcc-dev/syntax/gcc-match.vim: Do not override 'tabstop' here.
	* vimrc: Set preferred values for 'tabstop', 'softtabstop',
	'shiftwidth', 'noexpandtab', 'textwidth', 'formatoptions' for all
	files, not just C-like files.

From-SVN: r275316

	* src/c++17/memory_resource.cc: Use __constinit keyword.

From-SVN: r275315