gcc/ChangeLog:
	* doc/gcov.texi (-x): Remove duplicate "to".
	* doc/invoke.texi (-Wnoexcept-type): Remove duplicate "calls".
	(-Wif-not-aligned): Remove duplicate "is".
	(-flto): Remove duplicate "the".
	(MicroBlaze Options): In examples of "-mcpu=cpu-type", remove
	duplicate "v5.00.b".
	(MSP430 Options): Remove duplicate "and" from the description
	of "-mgprel-sec=regexp".
	(x86 Options): Remove duplicate copies of "vmldLog102" and
	vmlsLog104 from description of "-mveclibabi=type".

From-SVN: r263295

If a struct contains an anonymous union and both have a field with the
same name, detect_field_duplicates_hash() will replace one of them
with NULL.  If compilation doesn't stop immediately, it may later call
lookup_field() on the union, which falsely assumes the union's
LANG_SPECIFIC array is sorted, and may loop indefinitely because of
this.

2018-08-03  Bogdan Harjoc  <harjoc@gmail.com>

	PR c/86690
gcc/c:
	* c-typeck.c (lookup_field): Do not use TYPE_LANG_SPECIFIC after
	errors.

gcc/testsuite:
	* gcc.dg/union-duplicate-field.c: New test.

From-SVN: r263294

	PR c++/86706
	* class.c (build_base_path): Use currently_open_class.

	* g++.dg/template/pr86706.C: New test.

From-SVN: r263293

	* ChangeLog: Move entry ...
	* cp/ChangeLog: ... here.

From-SVN: r263292

This partially reverts r262482, at it broke canadian builds.

2018-08-03  Pierre-Marie de Rodat  <derodat@adacore.com>

gcc/ada/

	Reverts
	2018-07-06  Jim Wilson  <jimw@sifive.com>

	* Make-generated.in (treeprs.ads): Use $(GNATMAKE) instead of gnatmake.
	(einfo.h, sinfo.h, stamp-snames, stamp-nmake): Likewise.
	* gcc-interface/Makefile.in (xoscons): Likewise.

From-SVN: r263291

We couldn't vectorise:

  for (int j = 0; j < n; ++j)
    {
      for (int i = 0; i < 16; ++i)
	a[i] = (b[i] + c[i]) >> 1;
      a += step;
      b += step;
      c += step;
    }

at -O3 because cunrolli unrolled the inner loop and SLP couldn't handle
AVG_FLOOR patterns (see also PR86504).  The problem was some overly
strict checking of pattern statements compared to normal statements
in vect_get_and_check_slp_defs:

          switch (gimple_code (def_stmt))
            {
            case GIMPLE_PHI:
            case GIMPLE_ASSIGN:
	      break;

	    default:
	      if (dump_enabled_p ())
		dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
				 "unsupported defining stmt:\n");
	      return -1;
            }

The easy fix would have been to add GIMPLE_CALL to the switch,
but I don't think the switch is doing anything useful.  We only create
pattern statements that the rest of the vectoriser can handle, and the
other checks in this function and elsewhere check whether SLP is possible.

I'm also not sure why:

          if (!first && !oprnd_info->first_pattern
	      /* Allow different pattern state for the defs of the
		 first stmt in reduction chains.  */
	      && (oprnd_info->first_dt != vect_reduction_def

is necessary.  All that should matter is that the statements in the
node are "similar enough".  It turned out to be quite hard to find a
convincing example that used a mixture of pattern and non-pattern
statements, so bb-slp-pow-1.c is the best I could come up with.
But it does show that the combination of "xi * xi" statements and
"pow (xj, 2) -> xj * xj" patterns are handled correctly.

The patch therefore just removes the whole if block.

The loop also needed commutative swapping to be extended to at least
AVG_FLOOR.

This gives +3.9% on 525.x264_r at -O3.

2018-08-03  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* internal-fn.h (first_commutative_argument): Declare.
	* internal-fn.c (first_commutative_argument): New function.
	* tree-vect-slp.c (vect_get_and_check_slp_defs): Remove extra
	restrictions for pattern statements.  Use first_commutative_argument
	to look for commutative operands in calls to internal functions.

gcc/testsuite/
	* gcc.dg/vect/bb-slp-over-widen-1.c: Expect AVG_FLOOR to be used
	on vect_avg_qi targets.
	* gcc.dg/vect/bb-slp-over-widen-2.c: Likewise.
	* gcc.dg/vect/bb-slp-pow-1.c: New test.
	* gcc.dg/vect/vect-avg-15.c: Likewise.

From-SVN: r263290

	* src/c++11/system_error.cc
	(system_error_category::default_error_condition): Add workaround for
	ENOTEMPTY and EEXIST having the same value on AIX.
	* testsuite/19_diagnostics/error_category/system_category.cc: Add
	extra testcases for EDOM, EILSEQ, ERANGE, EEXIST and ENOTEMPTY.

From-SVN: r263289

	* Makefile.in (wide-int-range.o): New.
	* tree-vrp.c: Move all the wide_int_* functions to...
	* wide-int-range.cc: ...here.
	* tree-vrp.h: Move all the wide_int_* prototypes to...
	* wide-int-range.h: ...here.

From-SVN: r263288

If a target does not support exceptions, it can indicate this by returning
UI_NONE in TARGET_EXCEPT_UNWIND_INFO.  Currently the compiler still emits
exception tables for such a target.

This patch makes sure that no exception tables are emitted if the target does
not support exceptions.  This allows us to remove a workaround in
TARGET_ASM_BYTE_OP in the nvptx port.

Build on x86_64 with nvptx accelerator, and tested libgomp.

Build and reg-tested on x86_64.

2018-08-03  Tom de Vries  <tdevries@suse.de>

	* common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): Return
	UI_NONE.
	* config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Remove define.
	* except.c (output_function_exception_table): Do early exit if
	targetm_common.except_unwind_info (&global_options) == UI_NONE.

From-SVN: r263287

2018-08-03  Martin Liska  <mliska@suse.cz>

	* predict.c (dump_prediction): Change to 2 digits
        in fraction part.
2018-08-03  Martin Liska  <mliska@suse.cz>

	* gcc.dg/predict-1.c: Adjust scanned pattern to cover 2 digits.
	* gcc.dg/predict-13.c:Likewise.
	* gcc.dg/predict-3.c:Likewise.
	* gcc.dg/predict-4.c:Likewise.
	* gcc.dg/predict-5.c:Likewise.
	* gcc.dg/predict-6.c:Likewise.
	* gcc.dg/predict-9.c:Likewise.
	* gfortran.dg/predict-1.f90:Likewise.

From-SVN: r263286

There was a typo in the pipeline description where DUP was assigned to
the vector pipes for quad mode ops when it really only uses the VTOG
pipes.  Fixing this does not show any noticeable difference in
performance (there's a very small bump of 1.7% in x264 but that's
about it) in my tests but is the more precise description of operations
for falkor.

	* config/aarch64/falkor.md (falkor_am_1_vxvy_vxvy): Move
	neon_dup_q to...
	(falkor_am_1_gtov_gtov): ... a new insn reservation.

From-SVN: r263285

From-SVN: r263284

	* config/nds32/nds32.c (nds32_hard_regno_mode_ok): Replace > with >=.
	* df-problems.c (df_remove_dead_eq_notes): Replace > with >=.
	* dwarf2out.c (mem_loc_descriptor): Replace > with >=.
	* lra-constraints.c (spill_hard_reg_in_range): Replace <= with <.
	* lra-remat.c (call_used_input_regno_present_p): Replace <= with <.

From-SVN: r263280

We were rather sloppy about handling the ownership of prefixes for
pretty_printer, and this lead to a memory leak for any time a
diagnostic_show_locus call emits multiple line spans.

This showed up in "make selftest-valgrind" as:

3,976 bytes in 28 blocks are definitely lost in loss record 632 of 669
   at 0x4A0645D: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
   by 0x1F08227: xmalloc (xmalloc.c:147)
   by 0x1F083E6: xvasprintf (xvasprintf.c:58)
   by 0x1E7EC7D: build_message_string(char const*, ...) (diagnostic.c:78)
   by 0x1E7F438: diagnostic_get_location_text(diagnostic_context*, expanded_location) (diagnostic.c:328)
   by 0x1E7FD54: default_diagnostic_start_span_fn(diagnostic_context*, expanded_location) (diagnostic.c:626)
   by 0x1EB3508: selftest::test_diagnostic_context::start_span_cb(diagnostic_context*, expanded_location) (selftest-diagnostic.c:57)
   by 0x1E89215: diagnostic_show_locus(diagnostic_context*, rich_location*, diagnostic_t) (diagnostic-show-locus.c:1992)
   by 0x1E8ECAD: selftest::test_fixit_insert_containing_newline_2(selftest::line_table_case const&) (diagnostic-show-locus.c:3044)
   by 0x1EB0606: selftest::for_each_line_table_case(void (*)(selftest::line_table_case const&)) (input.c:3525)
   by 0x1E8F3F5: selftest::diagnostic_show_locus_c_tests() (diagnostic-show-locus.c:3164)
   by 0x1E010BF: selftest::run_tests() (selftest-run-tests.c:88)

4,004 bytes in 28 blocks are definitely lost in loss record 633 of 669
   at 0x4A0645D: malloc (in /usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
   by 0x1F08227: xmalloc (xmalloc.c:147)
   by 0x1F083E6: xvasprintf (xvasprintf.c:58)
   by 0x1E7EC7D: build_message_string(char const*, ...) (diagnostic.c:78)
   by 0x1E7F438: diagnostic_get_location_text(diagnostic_context*, expanded_location) (diagnostic.c:328)
   by 0x1E7FD54: default_diagnostic_start_span_fn(diagnostic_context*, expanded_location) (diagnostic.c:626)
   by 0x1EB3508: selftest::test_diagnostic_context::start_span_cb(diagnostic_context*, expanded_location) (selftest-diagnostic.c:57)
   by 0x1E89215: diagnostic_show_locus(diagnostic_context*, rich_location*, diagnostic_t) (diagnostic-show-locus.c:1992)
   by 0x1E8B373: selftest::test_diagnostic_show_locus_fixit_lines(selftest::line_table_case const&) (diagnostic-show-locus.c:2500)
   by 0x1EB0606: selftest::for_each_line_table_case(void (*)(selftest::line_table_case const&)) (input.c:3525)
   by 0x1E8F3B9: selftest::diagnostic_show_locus_c_tests() (diagnostic-show-locus.c:3159)
   by 0x1E010BF: selftest::run_tests() (selftest-run-tests.c:88)

This patch fixes the leaks by ensuring that the pretty_printer "owns"
the prefix if it's non-NULL, freeing it in the dtor and in pp_set_prefix.

gcc/cp/ChangeLog:
	* error.c (cxx_print_error_function): Duplicate "file" before
	passing it to pp_set_prefix.
	(cp_print_error_function): Use pp_take_prefix when saving the
	existing prefix.

gcc/ChangeLog:
	* diagnostic-show-locus.c (diagnostic_show_locus): Use
	pp_take_prefix when saving the existing prefix.
	* diagnostic.c (diagnostic_append_note): Likewise.
	* langhooks.c (lhd_print_error_function): Likewise.
	* pretty-print.c (pp_set_prefix): Drop the "const" from "prefix"
	param's type.  Free the existing prefix.
	(pp_take_prefix): New function.
	(pretty_printer::pretty_printer): Drop the prefix parameter.
	Rename the length parameter to match the comment.
	(pretty_printer::~pretty_printer): Free the prefix.
	* pretty-print.h (pretty_printer::pretty_printer): Drop the prefix
	parameter.
	(struct pretty_printer): Drop the "const" from "prefix" field's
	type and clarify memory management.
	(pp_set_prefix): Drop the "const" from the 2nd param.
	(pp_take_prefix): New decl.

From-SVN: r263275

rs6000-string.c (select_block_compare_mode): Move test for word_mode_ok here instead of passing as argument.

2018-07-31  Aaron Sawdey  <acsawdey@linux.ibm.com>

	* config/rs6000/rs6000-string.c (select_block_compare_mode): Move test
	for word_mode_ok here instead of passing as argument.
	(expand_block_compare): Change select_block_compare_mode() call.
	(expand_strncmp_gpr_sequence): New function.
	(expand_strn_compare): Make use of expand_strncmp_gpr_sequence.

From-SVN: r263273

	PR target/86790
	* config/m68k/m68k.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263272

Committed on behalf of Matthew Malcomson.

From-SVN: r263271

	PR target/86784
	* config/h8300/h8300.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263270

2018-08-02  Nicolas Pitre <nico@fluxnic.net>

	PR libgcc/86512
	* config/arm/ieee754-df.S (adddf3): Don't shortcut denormal handling
	when exponent goes negative. Update my email address.
	* config/arm/ieee754-sf.S (addsf3): Likewise.

From-SVN: r263267

	PR target/86813
	* config/stormy16/stormy16.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263266

The nvptx port can't support exceptions using sjlj, because ptx does not
support sjlj.  However, default_except_unwind_info still returns UI_SJLJ, even
even if we configure with --disable-sjlj-exceptions, because UI_SJLJ is the
fallback option.

The reason default_except_unwind_info doesn't return UI_DWARF2 is because
DWARF2_UNWIND_INFO is not defined in defaults.h, because
INCOMING_RETURN_ADDR_RTX is not defined, because there's no ptx equivalent.

Testcase libgomp.c++/for-15.C currently doesn't compile unless fno-exceptions
is added because:
- it tries to generate sjlj exception handling code, and
- it tries to generate exception tables using label-addressed .byte sequence.
  Ptx doesn't support generating random data at a label, nor being able to
  load/write data relative to a label.

This patch fixes the first problem by using UI_TARGET for nvptx.

The second problem is worked around by generating all .byte sequences commented
out.  It would be better to have a narrower workaround, and define
TARGET_ASM_BYTE_OP to "error: .byte unsupported " or some such.

This patch does not enable exceptions for nvptx, it merely allows c++ programs
to run correctly if they do no use exception handling.

Build and reg-tested on x86_64 with nvptx accelerator.

2018-08-02  Tom de Vries  <tdevries@suse.de>

	PR target/86660
	* common/config/nvptx/nvptx-common.c (nvptx_except_unwind_info): New
	function.  Return UI_TARGET unconditionally.
	(TARGET_EXCEPT_UNWIND_INFO): Redefine to nvptx_except_unwind_info.
	* config/nvptx/nvptx.c (TARGET_ASM_BYTE_OP): Emit commented out '.byte'.

	* testsuite/libgomp.oacc-c++/routine-1-auto.C: Remove -fno-exceptions.
	* testsuite/libgomp.oacc-c++/routine-1-template-auto.C: Same.
	* testsuite/libgomp.oacc-c++/routine-1-template-trailing-return-type.C:
	Same.
	* testsuite/libgomp.oacc-c++/routine-1-template.C: Same.
	* testsuite/libgomp.oacc-c++/routine-1-trailing-return-type.C: Same.
	* testsuite/libgomp.oacc-c-c++-common/routine-1.c: Same.

From-SVN: r263265

	PR target/86810
	* config/v850/v850.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263264

	PR target/86803
	* config/rx/rx.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263263

Noticed by Tamar (thanks).

2018-08-02  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* genemit.c (print_overload_test): Fix typo.

From-SVN: r263262

re PR c++/86763 (Wrong code comparing member of copy of a 237 byte object with nontrivial default constructor on x86-64 arch)

2018-08-02  Richard Biener  <rguenther@suse.de>

	PR c++/86763
	* class.c (layout_class_type): Copy TYPE_TYPELESS_STORAGE
	to the CLASSTYPE_AS_BASE.

	* g++.dg/torture/pr86763.C: New testcase.

From-SVN: r263261

	PR target/86797
	* config/msp430/msp430.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263259

	PR target/86791
	* config/mcore/mcore.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263258

2018-08-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/86816
	* tree-ssa-tail-merge.c (tail_merge_valueize): New function
	which checks for value availability before querying it.
	(gvn_uses_equal): Use it.
	(same_succ_hash): Likewise.
	(gimple_equal_p): Likewise.

	* g++.dg/torture/pr86816.C: New testcase.

From-SVN: r263257

	PR target/86789
	* config/m32r/m32r.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263256

	PR target/86787
	* config/iq2000/iq2000.c (TARGET_HAVE_SPECULATION_SAFE_VALUE):
	Define to speculation_safe_value_not_needed.

From-SVN: r263255

	PR target/86782
	* config/frv/frv.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Define to
	speculation_safe_value_not_needed.

From-SVN: r263254

	PR target/86781
	* config/fr30/fr30.c (TARGET_HAVE_SPECULATION_SAFE_VALUE): Define to
	speculation_safe_value_not_needed.

From-SVN: r263253

This reverts commit r263245.

From-SVN: r263252

Given a pattern like:

  (define_insn "aarch64_frecpe<mode>" ...)

the SVE ACLE implementation wants to generate the pattern for a
particular (non-constant) mode.  This patch automatically generates
helpers to do that, specifically:

  // Return CODE_FOR_nothing on failure.
  insn_code maybe_code_for_aarch64_frecpe (machine_mode);

  // Assert that the code exists.
  insn_code code_for_aarch64_frecpe (machine_mode);

  // Return NULL_RTX on failure.
  rtx maybe_gen_aarch64_frecpe (machine_mode, rtx, rtx);

  // Assert that generation succeeds.
  rtx gen_aarch64_frecpe (machine_mode, rtx, rtx);

Many patterns don't have sensible names when all <...>s are removed.
E.g. "<optab><mode>2" would give a base name "2".  The new functions
therefore require explicit opt-in, which should also help to reduce
code bloat.

The (arbitrary) opt-in syntax I went for was to prefix the pattern
name with '@', similarly to the existing '*' marker.

The patch also makes config/aarch64 use the new routines in cases where
they obviously apply.  This was mostly straight-forward, but it seemed
odd that we defined:

   aarch64_reload_movcp<...><P:mode>

but then only used it with DImode, never SImode.  If we should be
using Pmode instead of DImode, then that's a simple change,
but should probably be a separate patch.

2018-08-02  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* doc/md.texi: Expand the documentation of instruction names
	to mention port-local uses.  Document '@' in pattern names.
	* read-md.h (overloaded_instance, overloaded_name): New structs.
	(mapping): Declare.
	(md_reader::handle_overloaded_name): New member function.
	(md_reader::get_overloads): Likewise.
	(md_reader::m_first_overload): New member variable.
	(md_reader::m_next_overload_ptr): Likewise.
	(md_reader::m_overloads_htab): Likewise.
	* read-md.c (md_reader::md_reader): Initialize m_first_overload,
	m_next_overload_ptr and m_overloads_htab.
	* read-rtl.c (iterator_group): Add "type" and "get_c_token" fields.
	(get_mode_token, get_code_token, get_int_token): New functions.
	(map_attr_string): Add an optional argument that passes back
	the associated iterator.
	(overloaded_name_hash, overloaded_name_eq_p, named_rtx_p):
	(md_reader::handle_overloaded_name, add_overload_instance): New
	functions.
	(apply_iterators): Handle '@' names.  Report an error if '@'
	is used without iterators.
	(initialize_iterators): Initialize the new iterator_group fields.
	* genopinit.c (handle_overloaded_code_for)
	(handle_overloaded_gen): New functions.
	(main): Use them to print declarations of maybe_code_for_* and
	maybe_gen_* functions, and inline definitions of code_for_* and gen_*.
	* genemit.c (print_overload_arguments, print_overload_test)
	(handle_overloaded_code_for, handle_overloaded_gen): New functions.
	(main): Use it to print definitions of maybe_code_for_* and
	maybe_gen_* functions.
	* config/aarch64/aarch64.c (aarch64_split_128bit_move): Use
	gen_aarch64_mov{low,high}_di and gen_aarch64_movdi_{low,high}
	instead of explicit mode checks.
	(aarch64_split_simd_combine): Likewise gen_aarch64_simd_combine.
	(aarch64_split_simd_move): Likewise gen_aarch64_split_simd_mov.
	(aarch64_emit_load_exclusive): Likewise gen_aarch64_load_exclusive.
	(aarch64_emit_store_exclusive): Likewise gen_aarch64_store_exclusive.
	(aarch64_expand_compare_and_swap): Likewise
	gen_aarch64_compare_and_swap and gen_aarch64_compare_and_swap_lse
	(aarch64_gen_atomic_cas): Likewise gen_aarch64_atomic_cas.
	(aarch64_emit_atomic_swap): Likewise gen_aarch64_atomic_swp.
	(aarch64_constant_pool_reload_icode): Delete.
	(aarch64_secondary_reload): Use code_for_aarch64_reload_movcp
	instead of aarch64_constant_pool_reload_icode.  Use
	code_for_aarch64_reload_mov instead of explicit mode checks.
	(rsqrte_type, get_rsqrte_type, rsqrts_type, get_rsqrts_type): Delete.
	(aarch64_emit_approx_sqrt): Use gen_aarch64_rsqrte instead of
	get_rsqrte_type and gen_aarch64_rsqrts instead of gen_rqrts_type.
	(recpe_type, get_recpe_type, recps_type, get_recps_type): Delete.
	(aarch64_emit_approx_div): Use gen_aarch64_frecpe instead of
	get_recpe_type and gen_aarch64_frecps instead of get_recps_type.
	(aarch64_atomic_load_op_code): Delete.
	(aarch64_emit_atomic_load_op): Likewise.
	(aarch64_gen_atomic_ldop): Use UNSPECV_ATOMIC_* instead of
	aarch64_atomic_load_op_code.  Use gen_aarch64_atomic_load
	instead of aarch64_emit_atomic_load_op.
	* config/aarch64/aarch64.md (aarch64_reload_movcp<GPF_TF:mode><P:mode>)
	(aarch64_reload_movcp<VALL:mode><P:mode>, aarch64_reload_mov<mode>)
	(aarch64_movdi_<mode>low, aarch64_movdi_<mode>high)
	(aarch64_mov<mode>high_di, aarch64_mov<mode>low_di): Add a '@'
	character before the pattern name.
	* config/aarch64/aarch64-simd.md (aarch64_split_simd_mov<mode>)
	(aarch64_rsqrte<mode>, aarch64_rsqrts<mode>)
	(aarch64_simd_combine<mode>, aarch64_frecpe<mode>)
	(aarch64_frecps<mode>): Likewise.
	* config/aarch64/atomics.md (atomic_compare_and_swap<mode>)
	(aarch64_compare_and_swap<mode>, aarch64_compare_and_swap<mode>_lse)
	(aarch64_load_exclusive<mode>, aarch64_store_exclusive<mode>)
	(aarch64_atomic_swp<mode>, aarch64_atomic_cas<mode>)
	(aarch64_atomic_load<atomic_ldop><mode>): Likewise.

From-SVN: r263251

aarch64_float_const_representable_p was still returning false for
HFmode, so we wouldn't use 16-bit FMOV immediate.  E.g. before the
patch:

    __fp16 foo (void) { return 0x1.1p-3; }

gave:

       mov     w0, 12352
       fmov    h0, w0

with -march=armv8.2-a+fp16, whereas now it gives:

       fmov    h0, 1.328125e-1

2018-08-02  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* config/aarch64/aarch64.c (aarch64_float_const_representable_p):
	Allow HFmode constants if TARGET_FP_F16INST.

gcc/testsuite/
	* gcc.target/aarch64/f16_mov_immediate_1.c: Expect fmov immediate
	to be used.
	* gcc.target/aarch64/f16_mov_immediate_2.c: Likewise.
	* gcc.target/aarch64/f16_mov_immediate_3.c: Force +nofp16.
	* gcc.target/aarch64/sve/single_1.c: Except fmov immediate to be used
	for .h.
	* gcc.target/aarch64/sve/single_2.c: Likewise.
	* gcc.target/aarch64/sve/single_3.c: Likewise.
	* gcc.target/aarch64/sve/single_4.c: Likewise.

From-SVN: r263250

gcc/
2018-08-02  Jackson Woodruff  <jackson.woodruff@arm.com>

	PR target/86014
	* config/aarch64/aarch64.c (aarch64_operands_adjust_ok_for_ldpstp):
	No longer check last store for clobber of address register.


gcc/testsuite
2018-08-02  Jackson Woodruff  <jackson.woodruff@arm.com>

	PR target/86014
	* gcc.target/aarch64/ldp_stp_13.c: New test.

From-SVN: r263249

2018-08-02  Martin Liska  <mliska@suse.cz>

        PR gcov-profile/86817
	* gcov.c (process_all_functions): New function.
	(main): Call it.
	(process_file): Move functions processing to
        process_all_functions.

From-SVN: r263248

Fix sizeof(struct pthread) in glibc 2.14.

2018-08-02  Martin Liska  <mliska@suse.cz>

        PR sanitizer/86022
	* sanitizer_common/sanitizer_linux_libcdep.cc (ThreadDescriptorSize):
        Cherry-pick compiler-rt revision 338606.

From-SVN: r263246

In case of high register pressure in PIC mode, address of the stack
protector's guard can be spilled on ARM targets as shown in PR85434,
thus allowing an attacker to control what the canary would be compared
against. This is also known as CVE-2018-12886. ARM does lack
stack_protect_set and stack_protect_test insn patterns, defining them
does not help as the address is expanded regularly and the patterns
only deal with the copy and test of the guard with the canary.

This problem does not occur for x86 targets because the PIC access and
the test can be done in the same instruction. Aarch64 is exempt too
because PIC access insn pattern are mov of UNSPEC which prevents it from
the second access in the epilogue being CSEd in cse_local pass with the
first access in the prologue.

The approach followed here is to create new "combined" set and test
standard pattern names that take the unexpanded guard and do the set or
test. This allows the target to use an opaque pattern (eg. using UNSPEC)
to hide the individual instructions being generated to the compiler and
split the pattern into generic load, compare and branch instruction
after register allocator, therefore avoiding any spilling. This is here
implemented for the ARM targets. For targets not implementing these new
standard pattern names, the existing stack_protect_set and
stack_protect_test pattern names are used.

To be able to split PIC access after register allocation, the functions
had to be augmented to force a new PIC register load and to control
which register it loads into. This is because sharing the PIC register
between prologue and epilogue could lead to spilling due to CSE again
which an attacker could use to control what the canary gets compared
against.

2018-08-02  Thomas Preud'homme  <thomas.preudhomme@linaro.org>

    gcc/
    PR target/85434
    * target-insns.def (stack_protect_combined_set): Define new standard
    pattern name.
    (stack_protect_combined_test): Likewise.
    * cfgexpand.c (stack_protect_prologue): Try new
    stack_protect_combined_set pattern first.
    * function.c (stack_protect_epilogue): Try new
    stack_protect_combined_test pattern first.
    * config/arm/arm.c (require_pic_register): Add pic_reg and compute_now
    parameters to control which register to use as PIC register and force
    reloading PIC register respectively.  Insert in the stream of insns if
    possible.
    (legitimize_pic_address): Expose above new parameters in prototype and
    adapt recursive calls accordingly.
    (arm_legitimize_address): Adapt to new legitimize_pic_address
    prototype.
    (thumb_legitimize_address): Likewise.
    (arm_emit_call_insn): Adapt to new require_pic_register prototype.
    * config/arm/arm-protos.h (legitimize_pic_address): Adapt to prototype
    change.
    * config/arm/arm.md (movsi expander): Adapt to legitimize_pic_address
    prototype change.
    (stack_protect_combined_set): New insn_and_split pattern.
    (stack_protect_set): New insn pattern.
    (stack_protect_combined_test): New insn_and_split pattern.
    (stack_protect_test): New insn pattern.
    * config/arm/unspecs.md (UNSPEC_SP_SET): New unspec.
    (UNSPEC_SP_TEST): Likewise.
    * doc/md.texi (stack_protect_combined_set): Document new standard
    pattern name.
    (stack_protect_set): Clarify that the operand for guard's address is
    legal.
    (stack_protect_combined_test): Document new standard pattern name.
    (stack_protect_test): Clarify that the operand for guard's address is
    legal.

    gcc/testsuite/
    PR target/85434
    * gcc.target/arm/pr85434.c: New test.

From-SVN: r263245

gcc/ChangeLog:
	* dumpfile.c (dump_user_location_t::dump_user_location_t): Add
	"const" to the "gimple *" and "rtx_insn *" parameters.
	* dumpfile.h (dump_user_location_t::dump_user_location_t):
	Likewise.
	(dump_location_t::dump_location_t): Likewise.

From-SVN: r263244