PR c++/59813
	PR tree-optimization/89060
	* tree-ssa-live.h (live_vars_map): New typedef.
	(compute_live_vars, live_vars_at_stmt, destroy_live_vars): Declare.
	* tree-ssa-live.c: Include gimple-walk.h and cfganal.h.
	(struct compute_live_vars_data): New type.
	(compute_live_vars_visit, compute_live_vars_1, compute_live_vars,
	live_vars_at_stmt, destroy_live_vars): New functions.
	* tree-tailcall.c: Include tree-ssa-live.h.
	(live_vars, live_vars_vec): New global variables.
	(find_tail_calls): Perform variable life analysis before punting.
	(tree_optimize_tail_calls_1): Clean up live_vars and live_vars_vec.
	* tree-inline.h (struct copy_body_data): Add eh_landing_pad_dest
	member.
	* tree-inline.c (add_clobbers_to_eh_landing_pad): Remove BB argument.
	Perform variable life analysis to select variables that really need
	clobbers added.
	(copy_edges_for_bb): Don't call add_clobbers_to_eh_landing_pad here,
	instead set id->eh_landing_pad_dest and assert it is the same.
	(copy_cfg_body): Call it here if id->eh_landing_pad_dest is non-NULL.

	* gcc.dg/tree-ssa/pr89060.c: New test.

From-SVN: r271013

This patch fixes a problem with the thumb1 prologue code where the link
register could be unconditionally used as a scratch register even if the
return value was still live at the end of the prologue.

Additionally, the patch improves the code generated when we are not
using many low call-saved registers to make use of any unused call
clobbered registers to help with the saving of high registers that
cannot be pushed directly (quite rare in normal code as the register
allocator correctly prefers low registers).

2019-05-08  Mihail Ionescu  <mihail.ionescu@arm.com>
	    Richard Earnshaw  <rearnsha@arm.com>

gcc:

	PR target/88167
	* config/arm/arm.c (thumb1_prologue_unused_call_clobbered_lo_regs): New
	function.
	(thumb1_epilogue_unused_call_clobbered_lo_regs): New function.
	(thumb1_compute_save_core_reg_mask): Don't force a spare work
	register if both the epilogue and prologue can use call-clobbered
	regs.
	(thumb1_unexpanded_epilogue): Use
	thumb1_epilogue_unused_call_clobbered_lo_regs.  Reverse the logic for
	picking temporaries for restoring high regs to match that of the
	prologue where possible.
	(thumb1_expand_prologue): Add any usable call-clobbered low registers to
	the list of work registers.  Detect if the return address is still live
	at the end of the prologue and avoid using it for a work register if so.
	If the return address is not live, add LR to the list of pushable regs
	after the first pass.

gcc/testsuite:

	PR target/88167
	* gcc.target/arm/pr88167-1.c: New test.
	* gcc.target/arm/pr88167-2.c: New test.


Co-Authored-By: Richard Earnshaw <rearnsha@arm.com>

From-SVN: r271012

2019-05-08  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/90277
	* testsuite/23_containers/unordered_multiset/insert/24061-multiset.cc
	(test01): Reserve for number of insertions to avoid rehash during test.
	* testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
	(test01): Likewise.
	* testsuite/23_containers/unordered_multimap/insert/24061-multimap.cc
	(test01): Likewise.
	(test02): Likewise.
	(test03): Likewise.

From-SVN: r271011

	PR tree-optimization/90078
	* tree-ssa-loop-ivopts.c (INFTY): Increase value for infinite cost.
	(struct comp_cost): Promote type of members to int64_t.
	(infinite_cost): Don't set complexity in initialization.
	(comp_cost::operator +,-,+=,-+,/=,*=): Assert when cost computation
	overflows to infinite_cost.
	(adjust_setup_cost): Promote type of parameter and cost computation
	to int64_t.
	(struct ainc_cost_data, struct iv_ca): Promote type of member to
	int64_t.
	(get_scaled_computation_cost_at, determine_iv_cost): Promote type of
	cost computation to int64_t.
	(determine_group_iv_costs, iv_ca_dump, find_optimal_iv_set): Use
	int64_t's format specifier in dump.

	gcc/testsuite
	* g++.dg/tree-ssa/pr90078.C: New test.

From-SVN: r271008

	PR tree-optimization/90240
	* tree-ssa-loop-ivopts.c (get_scaled_computation_cost_at): Scale cost
	with respect to scaling factor pre-computed for each basic block.
	(try_improve_iv_set): Return bool if best_cost equals to iv_ca cost.
	(find_optimal_iv_set_1): Free iv_ca set if it has infinite_cost.
	(COST_SCALING_FACTOR_BOUND, determine_scaling_factor): New.
	(tree_ssa_iv_optimize_loop): Call determine_scaling_factor.  Extend
	live range for array of loop's basic blocks.  Cleanup aux field of
	loop's basic blocks.

	gcc/testsuite
	* gfortran.dg/graphite/pr90240.f: New test.

From-SVN: r271007

There are 3 instructions for AVX512BF16: VCVTNE2PS2BF16, VCVTNEPS2BF16 and
DPBF16PS instructions, which are Vector Neural Network Instructions
supporting:
    
- VCVTNE2PS2BF16: Convert Two Packed Single Data to One Packed BF16 Data.
- VCVTNEPS2BF16: Convert Packed Single Data to Packed BF16 Data.
- VDPBF16PS: Dot Product of BF16 Pairs Accumulated into Packed Single Precision.

2019-05-07  Wei Xiao  <wei3.xiao@intel.com>

	* common/config/i386/i386-common.c (OPTION_MASK_ISA_AVX512BF16_SET
	OPTION_MASK_ISA_AVX512BF16_UNSET, OPTION_MASK_ISA2_AVX512BW_UNSET): New.
	(OPTION_MASK_ISA2_AVX512F_UNSET): Add OPTION_MASK_ISA_AVX512BF16_UNSET.
	(ix86_handle_option): Handle -mavx512bf16.
	* config.gcc: Add avx512bf16vlintrin.h and avx512bf16intrin.h
	to extra_headers.
	* config/i386/avx512bf16vlintrin.h: New.
	* config/i386/avx512bf16intrin.h: New.
	* config/i386/cpuid.h (bit_AVX512BF16): New.
	* config/i386/driver-i386.c (host_detect_local_cpu): Detect BF16.
	* config/i386/i386-builtin-types.def: Add new types.
	* config/i386/i386-builtin.def: Add new builtins.
	* config/i386/i386-c.c (ix86_target_macros_internal): Define
	__AVX512BF16__.
	* config/i386/i386-option.c (ix86_target_string): Add -mavx512bf16.
	(ix86_option_override_internal): Handle BF16.
	(ix86_valid_target_attribute_inner_p): Ditto.
	* config/i386/i386-expand.c (ix86_expand_args_builtin): Ditto.
	* config/i386/i386-builtin.c (enum processor_features): Add
	F_AVX512BF16.
	(static const _isa_names_table isa_names_table): Ditto.
	* config/i386/i386.h (TARGET_AVX512BF16, TARGET_AVX512BF16_P): New.
	(PTA_AVX512BF16): Ditto.
	* config/i386/i386.opt: Add -mavx512bf16.
	* config/i386/immintrin.h: Include avx512bf16intrin.h
	and avx512bf16vlintrin.h.
	* config/i386/sse.md (avx512f_cvtne2ps2bf16_<mode><mask_name>,
	avx512f_cvtneps2bf16_<mode><mask_name>,
	avx512f_dpbf16ps_<mode><mask_half_name>): New define_insn patterns.
	* config/i386/subst.md (mask_half): Add new subst.
	* doc/invoke.texi: Document -mavx512bf16.

2019-05-07  Wei Xiao  <wei3.xiao@intel.com>

	* gcc.target/i386/avx512bf16-vcvtne2ps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16-vcvtneps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16-vdpbf16ps-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vcvtne2ps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vcvtneps2bf16-1.c: New test.
	* gcc.target/i386/avx512bf16vl-vdpbf16ps-1.c: New test.
	* gcc.target/i386/builtin_target.c: Handle avx512bf16.
	* gcc.target/i386/sse-12.c: Add -mavx512bf16.
	* gcc.target/i386/sse-13.c: Ditto.
	* gcc.target/i386/sse-14.c: Ditto.
	* gcc.target/i386/sse-22.c: Ditto.
	* gcc.target/i386/sse-23.c: Ditto.
	* g++.dg/other/i386-2.C: Ditto.
	* g++.dg/other/i386-3.C: Ditto.

2019-05-07  Hongtao Liu  <hongtao.liu@intel.com>

	* config/i386/cpuinfo.c (get_available_features): Detect BF16.
	* config/i386/cpuinfo.h (enum processor_features): Add
	FEATURE_AVX512BF16.

From-SVN: r271006

    source-gcc/libgomp/testsuite/libgomp.oacc-c-c++-common/pr87835.c: In function 'main':
    source-gcc/libgomp/testsuite/libgomp.oacc-c-c++-common/pr87835.c:45: warning: ignoring #pragma loop gang [-Wunknown-pragmas]
       45 |     #pragma loop gang
          |
    source-gcc/libgomp/testsuite/libgomp.oacc-c-c++-common/pr87835.c:19:7: warning: unused variable 'b' [-Wunused-variable]
       19 |   int b[n];
          |       ^

	libgomp/
	PR target/87835
	* testsuite/libgomp.oacc-c-c++-common/pr87835.c: Update.

From-SVN: r271004

From-SVN: r271003

re PR other/90381 (New test case gcc.dg/tree-ssa/pr88676-2.c fails with its introduction in r270934)

	PR other/90381
	* gcc.dg/tree-ssa/pr88676-2.c: Add 'target le' option to limit the
	test case to run on the little endian machine.

From-SVN: r271002

	PR tree-optimization/90356
	* match.pd ((X +/- 0.0) +/- 0.0): Optimize into X +/- 0.0 if possible.

	* gcc.dg/tree-ssa/pr90356-1.c: New test.
	* gcc.dg/tree-ssa/pr90356-2.c: New test.
	* gcc.dg/tree-ssa/pr90356-3.c: New test.
	* gcc.dg/tree-ssa/pr90356-4.c: New test.

From-SVN: r271001

    
    A direct interface type's value method takes value receiver now.
    Don't pass pointer to the method function.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/175798

From-SVN: r271000

    
    For a direct interface type T with a value method M, its pointer
    type (*T)'s method table includes a stub method of M which takes
    a (*T) as the receiver instead of a T. However, for the "typ"
    field of the method table entry, we added another layer of
    indirection, which makes it appear to take a **T, which is wrong.
    This causes problems when using reflect.Type.Method to get the
    method. This CL fixes the second, incorrect, indirection.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/175837

From-SVN: r270999

From-SVN: r270997

    
    Add a -fgo-debug-optimization option to emit optimization
    diagnostics. This can be used for testing optimizations. Apply
    this to the range clear optimizations of maps and arrays.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/170002

gcc/go:

	* lang.opt (-fgo-debug-optimization): New option.
	* go-c.h (struct go_create_gogo_args): Add debug_optimization
	field.
	* go-lang.c (go_langhook_init): Set debug_optimization field.
	* gccgo.texi (Invoking gccgo): Document -fgo-debug-optimization.

gcc/testsuite:

	* go.dg/arrayclear.go: New test.
	* go.dg/mapclear.go: New test.

From-SVN: r270993

	* 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.

From-SVN: r270991

	* include/experimental/bits/fs_path.h: Improve docs.
	* include/experimental/bits/net.h: Fix wrong header name in comment.
	Do not document implementation details.
	* include/experimental/netfwd: Fix doxygen grouping.

From-SVN: r270990

	* include/bits/stl_pair.h: Improve docs.
	* include/std/tuple: Likewise.

From-SVN: r270989

	* doc/doxygen/doxygroups.cc (std::literals): Add documentation for
	inline namespace.
	* include/std/chrono: Improve docs.
	* include/std/ratio: Do not document implementation details.
	* testsuite/20_util/ratio/cons/cons_overflow_neg.cc: Adjust dg-error
	line numbers.
	* testsuite/20_util/ratio/operations/ops_overflow_neg.cc: Likewise.

From-SVN: r270988

This change ensures that std::common_type<> is a complete type (LWG
2408), and that std::common_type<T>, std::common_type<cv T1, cv T2>, and
std::common_type<T1, T2, R...> will use program-defined specializations
for std::common_type<T1, T2> (LWG 2465).

The implementation of common_type<T1, T2, R...> is changed to use
void_t, and the specializations for duration and time_point are modified
to also use void_t instead of depending on implementation details of
common_type.

	PR libstdc++/89102
	* doc/xml/manual/intro.xml: Document DR 2408 and 2465 changes.
	* include/std/chrono (__duration_common_type_wrapper): Replace with ...
	(__duration_common_type): New helper.
	(common_type<chrono::duration<R1, P2>, chrono::duration<R2, P2>>): Use
	__duration_common_type.
	(__timepoint_common_type_wrapper): Replace with ...
	(__timepoint_common_type): New helper.
	(common_type<chrono::time_point<C, D2>, chrono::time_point<C, D2>>):
	Use __time_point_common_type.
	* include/std/type_traits (common_type<>): Define, as per LWG 2408.
	(__common_type_impl): If either argument is transformed by decay,
	use the common_type of the decayed types.
	(__common_type_impl<_Tp, _Up, _Tp, _Up>): If the types are already
	decayed, use __do_common_type_impl to get the common_type.
	(common_type<_Tp>): Use common_type<_Tp, _Tp>.
	(__do_member_type_wrapper, __member_type_wrapper)
	(__expanded_common_type_wrapper): Remove.
	(__common_type_pack, __common_type_fold): New helpers.
	(common_type<_Tp, _Up, _Vp...>): Use new helpers instead of
	__member_type_wrapper and __expanded_common_type_wrapper.
	* testsuite/20_util/common_type/requirements/explicit_instantiation.cc:
	Test zero-length template argument list.
	* testsuite/20_util/common_type/requirements/sfinae_friendly_1.cc:
	Test single argument cases and argument types that should decay.
	* testsuite/20_util/common_type/requirements/sfinae_friendly_2.cc:
	Adjust expected error.
	* testsuite/20_util/duration/literals/range_neg.cc: Use zero for
	dg-error lineno.
	* testsuite/20_util/duration/requirements/typedefs_neg1.cc: Likewise.
	* testsuite/20_util/duration/requirements/typedefs_neg2.cc: Likewise.
	* testsuite/20_util/duration/requirements/typedefs_neg3.cc: Likewise.

From-SVN: r270987

When fixing 90171 it struck me as undesirable to have so many separate
functions that all needed to know about the definition of a usual
deallocation function.  So this patch condenses them into one.  I left
destroying_delete_p because it is used by other files as well.

	* call.c (struct dealloc_info): New.
	(usual_deallocation_fn_p): Take a dealloc_info*.
	(aligned_deallocation_fn_p, sized_deallocation_fn_p): Remove.
	(build_op_delete_call): Adjust.

From-SVN: r270986

	* typeck.c (build_static_cast_1): Use cp_build_addr_expr.

For GCC 9 I fixed this bug with a patch to gimplify_cond_expr, but this
function was also doing the wrong thing.

Using build_address does not push the ADDR_EXPR down into the arms of a
COND_EXPR, which we need for proper handling of conversion of an lvalue ?:
to another reference type.

From-SVN: r270985

	* pt.c (type_dependent_expression_p): A non-type template parm with
	a placeholder type is type-dependent.

From-SVN: r270984

There are a few things left in the rs6000 port that are unused now
that we do not support old reload anymore.  This removes those.


	* config/rs6000/rs6000-protos.h (rs6000_legitimize_reload_address_ptr):
	Delete declaration.
	* config/rs6000/rs6000.c (rs6000_legitimize_reload_address): Delete.
	(rs6000_debug_legitimize_reload_address): Delete.
	(rs6000_legitimize_reload_address_ptr): Delete.
	(rs6000_option_override_internal): Adjust.
	(mem_operand_gpr): Adjust comment.
	(legitimate_lo_sum_address_p): Ditto.
	(rs6000_legitimize_reload_address): Delete.
	(rs6000_debug_legitimize_reload_address): Delete.
	* config/rs6000/rs6000.h (LEGITIMIZE_RELOAD_ADDRESS): Delete.

From-SVN: r270983

gcc/ChangeLog:

2019-05-07  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/89765
	* config/rs6000/rs6000-c.c (altivec_resolve_overloaded_builtin):
	In handling of ALTIVEC_BUILTIN_VEC_INSERT, use modular arithmetic
	to compute vector element selector for both constant and variable
	operands.

gcc/testsuite/ChangeLog:

2019-05-07  Kelvin Nilsen  <kelvin@gcc.gnu.org>

	PR target/89765
	* gcc.target/powerpc/pr89765-mc.c: New test.
	* gcc.target/powerpc/vsx-builtin-10c.c: New test.
	* gcc.target/powerpc/vsx-builtin-10d.c: New test.
	* gcc.target/powerpc/vsx-builtin-11c.c: New test.
	* gcc.target/powerpc/vsx-builtin-11d.c: New test.
	* gcc.target/powerpc/vsx-builtin-12c.c: New test.
	* gcc.target/powerpc/vsx-builtin-12d.c: New test.
	* gcc.target/powerpc/vsx-builtin-13c.c: New test.
	* gcc.target/powerpc/vsx-builtin-13d.c: New test.
	* gcc.target/powerpc/vsx-builtin-14c.c: New test.
	* gcc.target/powerpc/vsx-builtin-14d.c: New test.
	* gcc.target/powerpc/vsx-builtin-15c.c: New test.
	* gcc.target/powerpc/vsx-builtin-15d.c: New test.
	* gcc.target/powerpc/vsx-builtin-16c.c: New test.
	* gcc.target/powerpc/vsx-builtin-16d.c: New test.
	* gcc.target/powerpc/vsx-builtin-17c.c: New test.
	* gcc.target/powerpc/vsx-builtin-17d.c: New test.
	* gcc.target/powerpc/vsx-builtin-18c.c: New test.
	* gcc.target/powerpc/vsx-builtin-18d.c: New test.
	* gcc.target/powerpc/vsx-builtin-19c.c: New test.
	* gcc.target/powerpc/vsx-builtin-19d.c: New test.
	* gcc.target/powerpc/vsx-builtin-20c.c: New test.
	* gcc.target/powerpc/vsx-builtin-20d.c: New test.
	* gcc.target/powerpc/vsx-builtin-9c.c: New test.
	* gcc.target/powerpc/vsx-builtin-9d.c: New test.

From-SVN: r270982

	* config/i386/i386.md (cvt_mnemonic): New mode attribute.
	(ashr<mode>3_cvt): Merge insn pattern from ashrsi3_cvt and
	ashrdi3_cvt using SWI48 mode iterator.

From-SVN: r270981

https://gcc.gnu.org/ml/gcc-patches/2019-05/msg00323.html
	* files.c (_cpp_stack_file): Empty filenames aren't dependencies.
	* mkdeps.c (deps_add_dep): Assert not empty.

From-SVN: r270978

	* MAINTAINERS: Remove myself as IA-64 maintainer.

From-SVN: r270977

using SVE.

Given this input code:

int
sum_abs (uint8_t *restrict x, uint8_t *restrict y, int n)
{
  int sum = 0;

  for (int i = 0; i < n; i++)
    {
      sum += __builtin_abs (x[i] - y[i]);
    }

  return sum;
}

The resulting SVE code is:

0000000000000000 <sum_abs>:
   0:	7100005f 	cmp	w2, #0x0
   4:	5400026d 	b.le	50 <sum_abs+0x50>
   8:	d2800003 	mov	x3, #0x0                   	// #0
   c:	93407c42 	sxtw	x2, w2
  10:	2538c002 	mov	z2.b, #0
  14:	25221fe0 	whilelo	p0.b, xzr, x2
  18:	2538c023 	mov	z3.b, #1
  1c:	2518e3e1 	ptrue	p1.b
  20:	a4034000 	ld1b	{z0.b}, p0/z, [x0, x3]
  24:	a4034021 	ld1b	{z1.b}, p0/z, [x1, x3]
  28:	0430e3e3 	incb	x3
  2c:	0520c021 	sel	z1.b, p0, z1.b, z0.b
  30:	25221c60 	whilelo	p0.b, x3, x2
  34:	040d0420 	uabd	z0.b, p1/m, z0.b, z1.b
  38:	44830402 	udot	z2.s, z0.b, z3.b
  3c:	54ffff21 	b.ne	20 <sum_abs+0x20>  // b.any
  40:	2598e3e0 	ptrue	p0.s
  44:	04812042 	uaddv	d2, p0, z2.s
  48:	1e260040 	fmov	w0, s2
  4c:	d65f03c0 	ret
  50:	1e2703e2 	fmov	s2, wzr
  54:	1e260040 	fmov	w0, s2
  58:	d65f03c0 	ret

Notice how udot is used inside a fully masked loop.


gcc/Changelog:

2019-05-07  Alejandro Martinez  <alejandro.martinezvicente@arm.com>

	* config/aarch64/aarch64-sve.md (<su>abd<mode>_3): New define_expand.
	(aarch64_<su>abd<mode>_3): Likewise.
	(*aarch64_<su>abd<mode>_3): New define_insn.
	(<sur>sad<vsi2qi>): New define_expand.
	* config/aarch64/iterators.md: Added MAX_OPP attribute.
	* tree-vect-loop.c (use_mask_by_cond_expr_p): Add SAD_EXPR.
	(build_vect_cond_expr): Likewise.

gcc/testsuite/Changelog:
 
2019-05-07  Alejandro Martinez  <alejandro.martinezvicente@arm.com>

	* gcc.target/aarch64/sve/sad_1.c: New test for sum of absolute
	differences.

From-SVN: r270975

	* cfgexpand.c (asm_clobber_reg_is_valid): Reject
	clobbers outside of accessible_reg_set.
	* config/i386/i386.c (ix86_conditional_register_usage):
	Disable register sets by clearing corresponding bits in
	accessible_reg_set.  Do not set corresponding bits in fixed_regs,
	call_used_regs and don't clear corresponding reg_names array members.

testsuite/ChangeLog:

	* gcc.target/i386/asm-7.c: New test.
	* gcc.target/i386/asm-1.c: Update expected error string.
	* gcc.target/i386/pr62120.c: Ditto.

From-SVN: r270955

	* doc/xml/manual/intro.xml: Fix DR 2537 and DR 2566 confusion.

From-SVN: r270954

2019-05-01  Nina Dinka Ranns  <dinka.ranns@gmail.com>

	Make allocator propagation more consistent for
	operator+(basic_string) (P1165R1)
	* include/bits/basic_string.h
	(operator+(basic_string&&, basic_string&&): Changed resulting
	allocator to always be the one from the first parameter.
	* include/bits/basic_string.tcc
	(operator+(const _CharT*, const basic_string&)): Changed
	resulting allocator to be SOCCC on the second parameter's allocator.
	(operator+(_CharT, const basic_string&)): Likewise.
	* testsuite/21_strings/basic_string/allocator/char/operator_plus.cc:
	New.
	* testsuite/21_strings/basic_string/allocator/wchar_t/operator_plus.cc:
	New.

From-SVN: r270953

	* include/bits/regex.h: Improve docs.
	* include/bits/regex.tcc: Do not document implementation details.

From-SVN: r270952

Copied from 19_diagnostics/error_condition/hash.cc added recently.

	* testsuite/19_diagnostics/error_code/hash.cc: New test.

From-SVN: r270951

	* gcc-interface/Makefile.in (install-gcc-specs): Use foreach.
	Honor DESTDIR.

From-SVN: r270947

tree-vect-stmts.c (vect_is_simple_cond): When vectype is not specified still compute a comp_vectype for invariant compares.

2019-05-07  Richard Biener  <rguenther@suse.de>

	* tree-vect-stmts.c (vect_is_simple_cond): When vectype is
	not specified still compute a comp_vectype for invariant
	compares.

From-SVN: r270945

re PR tree-optimization/90316 (large compile time increase in opt / alias stmt walking for Go example)

2019-05-07  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90316
	* tree-ssa-pre.c (translate_vuse_through_block): When
	same_valid is NULL do not bother to search for a virtual
	PHI continuation.
	(phi_translate_1): When operands changed we cannot keep
	the same value-number so do not bother to ask whether
	that's possible from translate_vuse_through_block.

From-SVN: r270944

https://gcc.gnu.org/ml/gcc-patches/2019-05/msg00293.html
	* include/mkdeps.h (deps_write): Add PHONY arg.
	(deps_phony_targets): Delete.
	* init.c (cpp_finish): Just call deps_write.
	* mkdeps.c (struct mkdeps): Add local vector class.  Reimplement
	vector handling.
	(munge): Munge to static buffer.
	(apply_vpath): Adjust vector handling.
	(deps_init, deps_free): Use new, delete.
	(deps_add_target): Do not munge here.  Record quoting low water mark.
	(deps_add_dep): Do not munge here.
	(deps_add_vpath): Adjust vector handling.
	(make_write_name): New.  Munge on demand here.
	(make_write_vec): New.
	(deps_phony_targets): Delete.
	(make_write): New.
	(deps_write): Forward to deps_Write.
	(deps_save, deps_restore): Adjust vector handling.

From-SVN: r270943

2019-05-07  Martin Liska  <mliska@suse.cz>

	* bitmap.c (bitmap_register): Come up with
	alloc_descriptor_max_uid and assign it for
	a new bitmap.
	(register_overhead): Use get_descriptor as
	a descriptor.
	(release_overhead): New.
	(bitmap_elem_to_freelist): Call it.
	(bitmap_elt_clear_from): Likewise.
	(bitmap_obstack_free): Likewise.
	(bitmap_move): Sensitively release memory.
	* bitmap.h (struct GTY): Add alloc_descriptor and padding.
	(bitmap_initialize): Initialize alloc_descriptor to zero.
	* tree-ssa-pre.c (do_hoist_insertion): Use bitmap_move.

From-SVN: r270942

2019-05-07  Richard Biener  <rguenther@suse.de>

	* tree-vect-slp.c (vect_build_slp_tree_2): Bump size whenever
	we build a SLP node.  Remove max_size and limiting.
	(vect_analyze_slp_instance): Record and dump size of the SLP graph.

From-SVN: r270941

re PR tree-optimization/90316 (large compile time increase in opt / alias stmt walking for Go example)

2019-05-07  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90316
	* tree-ssa-alias.h (get_continuation_for_phi): Take walking
	limit by reference.
	(walk_non_aliased_vuses): Take walking limit argument.
	* tree-ssa-alias.c (maybe_skip_until): Take limit and abort
	walking if it is reached instead of just counting.
	(get_continuation_for_phi): Likewise.
	(walk_non_aliased_vuses): Likewise, instead of leaving counter
	limiting to the callback.
	* tree-ssa-sccvn.c (vn_reference_lookup_2): Adjust.
	(vn_reference_lookup_3): Likewise.
	(vn_reference_lookup_pieces): Likewise.
	(vn_reference_lookup): Likewise.
	* tree-ssa-pre.c (translate_vuse_through_block): Limit walking.
	* tree-ssa-scopedtables.c (vuse_eq): Adjust.
	(avail_exprs_stack::lookup_avail_expr): Likewise.

From-SVN: r270940