Currently, the compiler already generates common symbols for type
    descriptors, so the type descriptors are unique. However, when a
    type is created through reflection, it is not deduplicated with
    compiler-generated types. As a consequence, we cannot assume type
    descriptors are unique, and cannot use pointer equality to
    compare them. Also, when constructing a reflect.Type, it has to
    go through a canonicalization map, which introduces overhead to
    reflect.TypeOf, and lock contentions in concurrent programs.
    
    In order for the reflect package to deduplicate types with
    compiler-created types, we register all the compiler-created type
    descriptors at startup time. The reflect package, when it needs
    to create a type, looks up the registry of compiler-created types
    before creates a new one. There is no lock contention since the
    registry is read-only after initialization.
    
    This lets us get rid of the canonicalization map, and also makes
    it possible to compare type descriptors with pointer equality.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/179598

From-SVN: r271894

2019-06-03  Paolo Carlini  <paolo.carlini@oracle.com>

	* parser.c (cp_parser_unqualified_id): Use build_min_nt_loc in
      	five places.

From-SVN: r271893

    
    When the runtime collects a stack trace to associate it with some
    profiling event (mem alloc, mutex, etc) there is a skip count passed
    to runtime.Callers (or equivalent) to skip some known count of frames
    in order to get to the "interesting" frame corresponding to the
    profile event. Now that the profiling mechanism uses lazy fixup (when
    removing compiler artifacts like thunks, morestack calls etc), we also
    need to move the frame skipping logic after the fixup, so as to insure
    that the skip count isn't thrown off by these artifacts.
    
    Fixes golang/go#32290.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/179740

From-SVN: r271892

    
    This requires tracking all references to unexported variables, so that
    we can make them global symbols in the object file, and can export
    them so that other compilations can see the right definition for their
    own inline bodies.
    
    This introduces a syntax for referencing names defined in other
    packages: a <pNN> prefix, where NN is the package index.  This will
    need to be added to gccgoimporter, but I didn't do it yet since it
    isn't yet possible to create an object for which gccgoimporter will
    see a <pNN> prefix.
    
    This increases the number of inlinable functions in the standard
    library from 181 to 215, adding functions like context.Background.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/177920

From-SVN: r271891

    
    These functions were needed during the transition of the runtime from
    C to Go, but are no longer necessary.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/179879

From-SVN: r271890

This patch makes the -mmfpgpr option not do anything except warn that
the option is deprecated.


	* config/rs6000/rs6000.h (MASK_MFPGPR): Delete.
	* config/rs6000/rs6000.c (direct_move_p): Adjust.
	(rs6000_secondary_reload_simple_move): Adjust.
	(rs6000_opt_masks): Neuter the "mfpgpr" option.
	* config/rs6000/rs6000-c.c (rs6000_target_modify_macros): Adjust.
	* config/rs6000/rs6000-cpus.def (ISA_2_5_MASKS_EMBEDDED): Adjust
	comment.
	(power6x): Adjust.
	* config/rs6000/rs6000.md (floatsi<mode>2_lfiwax): Adjust.
	(floatunssi<mode>2_lfiwzx): Adjust.
	(fix_trunc<mode>si2_stfiwx): Adjust.
	(fixuns_trunc<mode>si2_stfiwx): Adjust.
	* config/rs6000/rs6000.opt (mno-mfpgpr): New.
	(mfpgpr): Mark as deprecated.
	* doc/extend.texi (PowerPC Function Attributes): Delete mfpgpr.
	(Basic PowerPC Built-in Functions Available on ISA 2.05): Adjust.
	* doc/invoke.texi (RS/6000 and PowerPC Options): Delete -mmfpgpr.

gcc/testsuite/
	* gcc.target/powerpc/mmfpgpr.c: Delete.

From-SVN: r271889

The "wg" constraint is used for the floating point side on mfpgpr
instructions.  Those instructions do not exist on any relevant
hardware.  This patch deletes the constraint and the insns using it.


	* config/rs6000/constraints.md (define_register_constraint "wg"):
	Delete.
	* config/rs6000/rs6000.h (enum r6000_reg_class_enum): Delete
	RS6000_CONSTRAINT_wg.
	* config/rs6000/rs6000.c (rs6000_debug_reg_global): Adjust.
	(rs6000_init_hard_regno_mode_ok): Adjust.
	* config/rs6000/rs6000.md (*mov<mode>_softfloat32, *movdi_internal64):
	Delete "wg" alternatives.
	* doc/md.texi (Machine Constraints): Adjust.

From-SVN: r271888

From-SVN: r271885

	* include/bits/stl_map.h (map): Disable static assert for C++98 mode.
	* include/bits/stl_multimap.h (multimap): Likewise.

From-SVN: r271884

    
    Some assembler doesn't accept ULL suffix. In fact the suffix
    is not really necessary. Drop it.
    
    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/180217

From-SVN: r271883

	* bb-reorder.c (copy_bb_p): Don't overflow size calculation.
	(get_uncond_jump_length): Assert length less than INT_MAX and
	non-negative.

From-SVN: r271877

2019-06-03  François Dumont  <fdumont@gcc.gnu.org>

	Rename variables and cleanup comments.
	* include/bits/hashtable_policy.h
	* include/bits/hashtable.h

From-SVN: r271876

        * gcc.dg/debug/enum-1.c: Add -fno-eliminate-unused-debug-symbols
        on AIX.
        * g++.dg/debug/enum-1.C: Same.

From-SVN: r271873

Improve the fix for PR64242.  Various optimizations can change a memory
reference into a frame access.  Given there are multiple virtual frame pointers
which may be replaced by multiple hard frame pointers, there are no checks for
writes to the various frame pointers.  So updates to a frame pointer tends to
generate incorrect code.  Improve the previous fix to also add clobbers of
several frame pointers and add a scheduling barrier.  This should work in most
cases until GCC supports a generic "don't optimize across this instruction"
feature.

Bootstrap OK. Testcase passes on AArch64 and x86-64.  Inspected x86, Arm,
Thumb-1 and Thumb-2 assembler which looks correct. 

    gcc/
	PR middle-end/64242
	* builtins.c (expand_builtin_longjmp): Add frame clobbers and schedule
	block.
	(expand_builtin_nonlocal_goto): Likewise.

    testsuite/
	PR middle-end/64242
	* gcc.c-torture/execute/pr64242.c: Update test.

From-SVN: r271870

A dynamic linker with lazy binding support may need to handle vector PCS
function symbols specially, so an ELF symbol table marking was
introduced for such symbols.

Function symbol references and definitions that follow the vector PCS
are marked in the generated assembly with .variant_pcs and then the
STO_AARCH64_VARIANT_PCS st_other flag is set on the symbol in the object
file.  The marking is propagated to the dynamic symbol table by the
static linker so a dynamic linker can handle such symbols specially.

For this to work, the assembler, the static linker and the dynamic
linker has to be updated on a system.  Old assembler does not support
the new .variant_pcs directive, so a toolchain with old binutils won't
be able to compile code that references vector PCS symbols.

gcc/ChangeLog:

	* config/aarch64/aarch64-protos.h (aarch64_asm_output_alias): Declare.
	(aarch64_asm_output_external): Declare.
	* config/aarch64/aarch64.c (aarch64_asm_output_variant_pcs): New.
	(aarch64_declare_function_name): Call aarch64_asm_output_variant_pcs.
	(aarch64_asm_output_alias): New.
	(aarch64_asm_output_external): New.
	* config/aarch64/aarch64.h (ASM_OUTPUT_DEF_FROM_DECLS): Define.
	(ASM_OUTPUT_EXTERNAL): Define.

gcc/testsuite/ChangeLog:

	* gcc.target/aarch64/pcs_attribute-2.c: New test.
	* gcc.target/aarch64/torture/simd-abi-4.c: Check .variant_pcs support.
	* lib/target-supports.exp (check_effective_target_aarch64_variant_pcs):
	New.

From-SVN: r271869

	* doc/xml/manual/status_cxx2020.xml: Add missing row for P0920R2.
	Fix bgcolor for P0340R3.
	* doc/html/*: Regenerate.

From-SVN: r271868

	PR libstdc++/90686
	* doc/xml/manual/status_cxx2014.xml: Document what's missing from
	<experimental/memory_resource>.
	* doc/xml/manual/status_cxx2020.xml: Document status of P1285R0,
	P0339R6, P0340R3, P1164R1 and P1357R1.
	* doc/html/*: Regenerate.

From-SVN: r271867

In previous standards it is undefined for a container and its allocator
to have a different value_type. Libstdc++ has traditionally allowed it
as an extension, automatically rebinding the allocator to the
container's value_type. Since GCC 8.1 that extension has been disabled
for C++11 and later when __STRICT_ANSI__ is defined (i.e. for
-std=c++11, -std=c++14, -std=c++17 and -std=c++2a).

Since the acceptance of P1463R1 into the C++2a draft an incorrect
allocator::value_type now requires a diagnostic. This patch implements
that by enabling the static_assert for -std=gnu++2a as well.

	* doc/xml/manual/status_cxx2020.xml: Document P1463R1 status.
	* include/bits/forward_list.h [__cplusplus > 201703]: Enable
	allocator::value_type assertion for C++2a.
	* include/bits/hashtable.h: Likewise.
	* include/bits/stl_deque.h: Likewise.
	* include/bits/stl_list.h: Likewise.
	* include/bits/stl_map.h: Likewise.
	* include/bits/stl_multimap.h: Likewise.
	* include/bits/stl_multiset.h: Likewise.
	* include/bits/stl_set.h: Likewise.
	* include/bits/stl_vector.h: Likewise.
	* testsuite/23_containers/deque/48101-3_neg.cc: New test.
	* testsuite/23_containers/forward_list/48101-3_neg.cc: New test.
	* testsuite/23_containers/list/48101-3_neg.cc: New test.
	* testsuite/23_containers/map/48101-3_neg.cc: New test.
	* testsuite/23_containers/multimap/48101-3_neg.cc: New test.
	* testsuite/23_containers/multiset/48101-3_neg.cc: New test.
	* testsuite/23_containers/set/48101-3_neg.cc: New test.
	* testsuite/23_containers/unordered_map/48101-3_neg.cc: New test.
	* testsuite/23_containers/unordered_multimap/48101-3_neg.cc: New test.
	* testsuite/23_containers/unordered_multiset/48101-3_neg.cc: New test.
	* testsuite/23_containers/unordered_set/48101-3_neg.cc: New test.
	* testsuite/23_containers/vector/48101-3_neg.cc: New test.

From-SVN: r271866

	* tree-vrp.h (value_range_base::nonzero_p): New.
	(value_range_base::set_nonnull): Rename to...
	(value_range_base::set_nonzero): ...this.
	(value_range_base::set_null): Rename to...
	(value_range_base::set_zero): ...this.
	(value_range::set_nonnull): Remove.
	(value_range::set_null): Remove.
	* tree-vrp.c (range_is_null): Remove.
	(range_is_nonnull): Remove.
	(extract_range_from_binary_expr): Use value_range_base::*zero_p
	instead of range_is_*null.
	(extract_range_from_unary_expr): Same.
	(value_range_base::set_nonnull): Rename to...
	(value_range_base::set_nonzero): ...this.
	(value_range::set_nonnull): Remove.
	(value_range_base::set_null): Rename to...
	(value_range_base::set_zero): ...this.
	(value_range::set_null): Remove.
	(extract_range_from_binary_expr): Rename set_*null uses to
	set_*zero.
	(extract_range_from_unary_expr): Same.
	(union_helper): Same.
	* vr-values.c (get_value_range): Use set_*zero instead of
	set_*null.
	(vr_values::extract_range_from_binary_expr): Same.
	(vr_values::extract_range_basic): Same.

From-SVN: r271865

Fix the alignment option parser to always allow up to 4 alignments.
Now -falign-functions=16:8:8:8 no longer reports an error.

    gcc/
	PR driver/90684
	* opts.c (parse_and_check_align_values): Allow 4 alignment values.
M    gcc/ChangeLog
M    gcc/opts.c

From-SVN: r271864

Wilco pointed out that when the Dot Product instructions are available we can use them
to generate an even more efficient expansion for the [us]sadv16qi optab.
Instead of the current:
        uabdl2  v0.8h, v1.16b, v2.16b
        uabal   v0.8h, v1.8b, v2.8b
        uadalp  v3.4s, v0.8h

we can generate:
      (1)  mov    v4.16b, 1
      (2)  uabd    v0.16b, v1.16b, v2.16b
      (3)  udot    v3.4s, v0.16b, v4.16b

Instruction (1) can be CSEd across multiple such expansions and even hoisted outside of loops,
so when this sequence appears frequently back-to-back (like in x264_r) we essentially only have 2 instructions
per sum. Also, the UDOT instruction does the byte-to-word accumulation in one step, which allows us to use
the much simpler UABD instruction before it.

This makes it a shorter and lower-latency sequence overall for targets that support it.

	* config/aarch64/iterators.md (MAX_OPP): New code attr.
	* config/aarch64/aarch64-simd.md (*aarch64_<su>abd<mode>_3): Rename to...
	(aarch64_<su>abd<mode>_3): ... This.
	(<sur>sadv16qi): Add TARGET_DOTPROD expansion.

	* gcc.target/aarch64/ssadv16qi.c: Add +nodotprod to pragma.
	* gcc.target/aarch64/usadv16qi.c: Likewise.
	* gcc.target/aarch64/ssadv16qi-dotprod.c: New test.
	* gcc.target/aarch64/usadv16qi-dotprod.c: Likewise.

From-SVN: r271863

2019-06-03  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	* lib/target-supports.exp (add_options_for_aarch64_sve): New procedure.
	(aarch64_sve_hw_bits): Call add_options_for_aarch64_sve.
	(check_effective_target_aarch64_sve_hw): Likewise.

From-SVN: r271862

2019-06-03  Martin Liska  <mliska@suse.cz>

	* doc/generic.texi: Remove Java Trees.

From-SVN: r271861

tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Get original full reference tree and record in ref->ref.

2019-06-03  Richard Biener  <rguenther@suse.de>

	* tree-ssa-sccvn.c (ao_ref_init_from_vn_reference): Get original
	full reference tree and record in ref->ref.
	(vn_reference_lookup_3): Pass in original ref to
	ao_ref_init_from_vn_reference.
	(vn_reference_lookup): Likewise.
	* tree-ssa-sccvn.h (ao_ref_init_from_vn_reference): Adjust prototype.
	* tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p):
	Handle non-decl bases in the original reference.

	* gcc.dg/tree-ssa/alias-access-path-1.c: Scan fre1.

From-SVN: r271860

2019-06-03  Martin Liska  <mliska@suse.cz>

	* fold-const.c (operand_equal_p): Fix typo as compare_tree_int
	returns 0 when operands are equal.

From-SVN: r271859

2019-06-03  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90716
	* tree-loop-distribution.c (destroy_loop): Process blocks in
	correct order.

	* gcc.dg/guality/pr90716.c: New testcase.

From-SVN: r271858

2019-06-03  Prathamesh Kulkarni  <prathamesh.kulkarni@linaro.org>

	PR target/88837
	* vector-builder.h (vector_builder::count_dups): New method.
	* config/aarch64/aarch64-protos.h (aarch64_expand_sve_vector_init):
	Declare prototype.
	* config/aarch64/aarch64/sve.md (aarch64_sve_rev64<mode>): Use @.
	(vec_init<mode><Vel>): New pattern.
	* config/aarch64/aarch64.c (emit_insr): New function.
	(aarch64_sve_expand_vector_init_handle_trailing_constants): Likewise.
	(aarch64_sve_expand_vector_init_insert_elems): Likewise.
	(aarch64_sve_expand_vector_init_handle_trailing_same_elem): Likewise.
	(aarch64_sve_expand_vector_init): Define two overloaded functions.

testsuite/
	* gcc.target/aarch64/sve/init_1.c: New test.
	* gcc.target/aarch64/sve/init_1_run.c: Likewise.
	* gcc.target/aarch64/sve/init_2.c: Likewise.
	* gcc.target/aarch64/sve/init_2_run.c: Likewise.
	* gcc.target/aarch64/sve/init_3.c: Likewise.
	* gcc.target/aarch64/sve/init_3_run.c: Likewise.
	* gcc.target/aarch64/sve/init_4.c: Likewise.
	* gcc.target/aarch64/sve/init_4_run.c: Likewise.
	* gcc.target/aarch64/sve/init_5.c: Likewise.
	* gcc.target/aarch64/sve/init_5_run.c: Likewise.
	* gcc.target/aarch64/sve/init_6.c: Likewise.
	* gcc.target/aarch64/sve/init_6_run.c: Likewise.
	* gcc.target/aarch64/sve/init_7.c: Likewise.
	* gcc.target/aarch64/sve/init_7_run.c: Likewise.
	* gcc.target/aarch64/sve/init_8.c: Likewise.
	* gcc.target/aarch64/sve/init_8_run.c: Likewise.
	* gcc.target/aarch64/sve/init_9.c: Likewise.
	* gcc.target/aarch64/sve/init_9_run.c: Likewise.
	* gcc.target/aarch64/sve/init_10.c: Likewise.
	* gcc.target/aarch64/sve/init_10_run.c: Likewise.
	* gcc.target/aarch64/sve/init_11.c: Likewise.
	* gcc.target/aarch64/sve/init_11_run.c: Likewise.
	* gcc.target/aarch64/sve/init_12.c: Likewise.
	* gcc.target/aarch64/sve/init_12_run.c: Likewise.

From-SVN: r271857

This patch fixes bug 90681.  It was caused by trying to SLP vectorize a non
groupped load.  We've fixed it by tweaking a bit the implementation: mark
masked loads as not vectorizable, but support them as an special case.  Then
the detect them in the test for normal non-groupped loads that was already
there.

From-SVN: r271856

2019-06-03  Richard Biener  <rguenther@suse.de>

	PR testsuite/90713
	* gcc.dg/gimplefe-40.c: Add -maltivec for powerpc.

From-SVN: r271855

2019-06-03  Martin Liska  <mliska@suse.cz>

	* cfg.c (debug): Use TDF_DETAILS for debug and
	print edge info only once.

From-SVN: r271854

2019-05-06  H.J. Lu  <hongjiu.lu@intel.com>
	    Hongtao Liu  <hongtao.liu@intel.com>

	PR target/89750
	PR target/86444
	* config/i386/i386-expand.c (ix86_expand_sse_comi_round):
	Modified, original implementation isn't correct.

2019-05-06  H.J. Lu  <hongjiu.lu@intel.com>
	    Hongtao Liu  <hongtao.liu@intel.com>

	PR target/89750
	PR target/86444
	* gcc.target/i386/avx512f-vcomisd-2.c: New.
	* gcc.target/i386/avx512f-vcomisd-2.c: Likewise.

Co-Authored-By: Hongtao Liu <hongtao.liu@intel.com>

From-SVN: r271853

From-SVN: r271852

re PR fortran/90539 (481.wrf slowdown by 25% on Intel Kaby with -Ofast -march=native starting with r271377)

2019-06-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/90539
	* trans-expr.c (gfc_conv_subref_array_arg): If the size of the
	expression can be determined to be one, treat it as contiguous.
	Set likelyhood of presence of an actual argument according to
	PRED_FORTRAN_ABSENT_DUMMY and likelyhood of being contiguous
	according to PRED_FORTRAN_CONTIGUOUS.

2019-06-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/90539
	* predict.def (PRED_FORTRAN_CONTIGUOUS): New predictor.

2019-06-02  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/90539
	* gfortran.dg/internal_pack_24.f90: New test.

From-SVN: r271844

From-SVN: r271843

We don't have support for -mcmodel={medium, large, kernel} so don't
expect tests for those things to work.

For now mark them as xfail where possible and skip where that isn't.
These changes will be logged onto the PR and therefore can be backed
out when the facility is implemented.

gcc/testsuite/ChangeLog:

2019-06-01  Iain Sandoe  <iain@sandoe.co.uk>

	PR target/90698
	* gcc.target/i386/pr49866.c: XFAIL for Darwin.
	* gcc.target/i386/pr63538.c: Likewise.
	* gcc.target/i386/pr61599-1.c: Skip for Darwin.

From-SVN: r271839

gcc/ChangeLog:

	PR middle-end/90694
	* tree-pretty-print.c (dump_generic_node): Add parentheses.

gcc/testsuite/ChangeLog:

	PR middle-end/90694
	* gcc.dg/tree-ssa/dump-5.c: New test.

From-SVN: r271838

	* alias.c: Include ipa-utils.h.
	(get_alias_set): Try to complete ODR type via ODR type hash lookup.
	* ipa-devirt.c (prevailing_odr_type): New.
	* ipa-utils.h (previaling_odr_type): Declare.

	* g++.dg/lto/alias-1_0.C: New testcase.
	* g++.dg/lto/alias-1_1.C: New testcase.

From-SVN: r271837

From-SVN: r271836

PR c++/85254

gcc/cp

PR c++/85254
* class.c (fixup_type_variants): Handle CLASSTYPE_FINAL.

testsuite/

PR c++/85254
* g++.dg/ext/is_final.C: Amend.

From-SVN: r271835

From-SVN: r271832