2017-06-23  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        rtl-optimizatoin/79286
        * ira.c (update_equiv_regs): Revert to using may_trap_or_fault_p again.
        * rtlanal.c (rtx_addr_can_trap_p_1): SYMBOL_REF_FUNCTION_P can never
        trap.  PIC register plus a const unspec without offset can never trap.

From-SVN: r249588

2017-06-23  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* tree.h (builtin_structptr_type): New type.
	(builtin_structptr_types): Declare new array.
	* tree.c (builtin_structptr_types): New array.
	(free_lang_data, build_common_tree_nodes): Use it.

gcc/c-family/
	* c-common.c (c_common_nodes_and_builtins): Use builtin_structptr_types.

gcc/cp/
	* decl.c (duplicate_decls): Use builtin_structptr_types.

gcc/lto/
	* lto-lang.c (lto_init): Use builtin_structptr_types.

From-SVN: r249585

	PR c++/81187
	* doc/invoke.texi (-Wnoexcept-type): Fix name of option, from
	-Wnoexcept.

From-SVN: r249584

From-SVN: r249583

    
    Now that systemstack changes to the g0 stack, this check passes.
    
    Reviewed-on: https://go-review.googlesource.com/46460

From-SVN: r249578

    
    The CgocallbackDone function calls dropm after it calls entersyscall,
    which means that dropm must not have any write barriers. Mark it
    accordingly.
    
    Reviewed-on: https://go-review.googlesource.com/46464

From-SVN: r249577

    
    Use go:linkname to export the getm function. This makes it visible to
    runtime/testdata/testprogcgo/dropm_stub.go, which uses it as part of
    the TestEnsureDropM test in runtime/crash_cgo_test.go. That test is
    not run today, but it will be soon.
    
    Reviewed-on: https://go-review.googlesource.com/46462

From-SVN: r249576

    
    Patch from Rainer Orth.
    
    Reviewed-on: https://go-review.googlesource.com/46459

From-SVN: r249575

gcc/

2017-06-22  Matt Turner  <mattst88@gmail.com>

	* config/i386/driver-i386.c (host_detect_local_cpu): Add Kaby
	Lake models to skylake case.  Assume skylake for unknown
	models with clflushopt.

gcc/testsuite/

2017-06-22  Matt Turner  <mattst88@gmail.com>

	* gcc.target/i386/builtin_target.c: Add Kaby Lake models to
	skylake check.

libgcc/

2017-06-22  Matt Turner  <mattst88@gmail.com>

	* config/i386/cpuinfo.c (get_intel_cpu): Add Kaby Lake models to
	skylake case.

From-SVN: r249574

builtins-3.c (vmulosh, [...]): Fix scan-assembler-times should check for word not half word instructions.

gcc/testsuite/ChangeLog:

2017-06-22 Carl Love  <cel@us.ibm.com>

	* gcc.target/powerpc/builtins-3.c (vmulosh, vmulouh, vmulesh,
	vmuleuh): Fix scan-assembler-times should check for word not half word
	instructions.

From-SVN: r249572

	Reorder IDENTIFIER flags
	gcc/cp/
	* cp-tree.h (enum cp_identifier_kind): New.
	(IDENTIFIER_KIND_BIT_0, IDENTIFIER_KIND_BIT_1,
	IDENTIFIER_KIND_BIT_2): New.
	(IDENTIFIER_MARKED): Move to TREE_LANG_FLAG_4.
	(IDENTIFIER_VIRTUAL_P, IDENTIFIER_REPO_CHOSEN): Add
	IDENTIFIER_CHECK.
	(C_IS_RESERVED_WORD): Replace with ...
	(IDENTIFIER_KEYWORD_P): ... this.
	(IDENTIFIER_CTOR_OR_DTOR_P): Replace with ...
	(IDENTIFIER_CDTOR_P): ... this.
	(IDENTIFIER_CTOR_P, IDENTIFIER_DTOR_P): New.
	(IDENTIFIER_OPNAME_P): Replace with ...
	(IDENTIFIER_ANY_OP_P): ... this.
	(IDENTIFIER_ASSIGN_OP_P): New.
	(IDENTIFIER_TYPENAME_P): Replace with ...
	(IDENTIFIER_CONV_OP_P): ... this.
	(NEW_DELETE_OPNAME_P): Replace with ...
	(IDENTIFIER_NEWDEL_OP_P): ... this.
	(DECL_CONV_FN_P, DECL_OVERLOADED_OPERATOR_P): Adjust.
	(get_identifier_kind_name, set_identifier_kind): Declare.
	* lex.c (get_identifier_kind_name, set_identifier_kind): New.
	(init_operators): Adjust to avoid keywords, use
	set_identifier_kind. Copy TYPE_EXPR slot.
	(init_reswords): Call set_identifier_kind.
	(unqualified_name_lookup_error): Adjust.
	* operators.def (TYPE_EXPR): Remove.
	* decl.c (struct predefined_identifier): Move into ...
	(initialize_predefined_identifiers): ... here.  Call
	set_identifier_kind.
	(grokfndecl, check_var_type, grokdeclarator): Adjust.
	(grok_op_properties): Use IDENTIFIER_ANY_ASSIGN_OP to halve search
	space.  Adjust.
	* call.c (name_as_c_string): Adjust.
	(build_new_method_call_1): Likewise.
	* cp-cilkplus.c (is_conversion_operator_function_decl_p):
	Likewise.
	* cxx-pretty-print.c (pp_cxx_unqualified_id): Adjust.
	* dump.c (cp_dump_tree): Adjust.
	* error.c (dump_decl_name): Adjust.
	* mangle.c (write_unqualified_id, write_member_name)
	write_expression): Adjust.
	(mangle_conv_op_name_for_type): Use set_identifier_kind.
	* name-lookup.c (do_class_using_decl): Adjust.
	(lookup_name_fuzzy, lookup_name_real_1): Likewise.
	* parser.c (cp_lexer_get_preprocessor_token)
	cp_parser_direct_declarator): Likewise.
	* pt.c (push_template_decl_real, tsubst_decl, tsubst_baselink)
	tsubst_copy, tsubst_copy_and_build): Adjust.
	* ptree.c (cxx_print_identifier): Print identifier kind.
	* search.c (lookup_field_r, lookup_member)
	lookup_fnfields_idx_nolazy): Adjust.
	* semantics.c (finish_id_expression): Adjust..
	* typeck.c (cp_build_addr_expr_1): Adjust.

From-SVN: r249571

aarch64.c (aarch64_emit_probe_stack_range): Handle frame sizes that do not satisfy aarch64_uimm12_shift.

	* config/aarch64/aarch64.c (aarch64_emit_probe_stack_range): Handle
	frame sizes that do not satisfy aarch64_uimm12_shift.

	* gcc.c-torture/compile/stack-check-1.c: New test.

From-SVN: r249566

    
    In libgo system goroutines register themselves after they start.
    That means that there is a small race between the goroutine being
    seen by the scheduler and the scheduler knowing that the goroutine
    is a system goroutine. That in turn means that runtime.NumGoroutines
    can overestimate the number of goroutines at times.
    
    This patch fixes the overestimate by counting the number of system
    goroutines waiting to start, and pausing NumGoroutines until those
    goroutines have all registered.
    
    This is kind of a lot of mechanism for this not very important
    problem, but I couldn't think of a better approach.
    
    The test for this is TestNumGoroutine in runtime/proc_test.go.
    The test is not currently run, but it will be soon.
    
    Reviewed-on: https://go-review.googlesource.com/46457

From-SVN: r249565

    
    Remove stale comment in code that accepts "go:nowritebarrier"
    pragma. Update comment for "go:nowritebarrierrec".
    
    Reviewed-on: https://go-review.googlesource.com/46416

From-SVN: r249564

	* profile-count.h (apply_probability,
	apply_scale, probability_in): Fix checks for zero.

From-SVN: r249563

    
    With the gc toolchain apparently
            var s *string
            _ = *s
    is enough to panic with a nil pointer dereference. The gccgo compiler
    will simply discard the dereference, which I think is a reasonable and
    acceptable optimization. Change the tests to use an exported variable
    instead. The tests are not currently run, but they will be with a
    later patch to gotools.
    
    Reviewed-on: https://go-review.googlesource.com/46450

From-SVN: r249562

    
    Because of how gccgo implements cgo calls, the code in dropm may not
    have any write barriers.  As a step toward implementing that, change
    the gcstack, gcnextsegment, and gcnextsp fields of the g struct to
    uintptr, so that assignments to them do not require write barriers.
    The gcinitialsp field remains unsafe.Pointer, as on 32-bit systems
    that do not support split stack it points to a heap allocated space
    used for the goroutine stack.
    
    The test for this is runtime tests like TestCgoCallbackGC, which are
    not run today but will be run with a future gotools patch.
    
    Reviewed-on: https://go-review.googlesource.com/46396

From-SVN: r249561

	* incpath.c (add_sysroot_to_chain): Allow for $SYSROOT prefix.
	* doc/cppdiropts.texi (-I @var{dir}): Document it.

From-SVN: r249560

    
    Calling a deferred function currently requires changing from a uintptr
    to the function code to a Go function value. That is done by setting
    the value of a func local variable using unsafe.Pointer. The local
    variable will always be on the stack. Adjust the code that sets the
    local variable to avoid generating a write barrier.
    
    A write barrier is never needed here. Also, for deferreturn, we must
    avoid write barriers entirely when called from a cgo function; that
    requires more than just this, but this is a start.
    
    The test for this is runtime tests that use the go tool; these are not
    currently run, but they will be in the future.
    
    Reviewed-on: https://go-review.googlesource.com/46455

From-SVN: r249559

    
    The gc version of the _defer struct has a _panic field that has a
    completely different meaning. We are going to want that bring that new
    meaning into the gofrontend to improve panic reports with nested
    panic calls. Simplify that by first renaming the existing _panic field.
    
    Reviewed-on: https://go-review.googlesource.com/46454

From-SVN: r249558

    
    - don't run tests that depend on SetCgoTraceback
    - don't expect a '(' after the function name in a traceback
    - change the expected name of nested functions in a traceback
    
    These tests are not currently run, but they will be soon.
    
    Reviewed-on: https://go-review.googlesource.com/46453

From-SVN: r249557

    
    The gofrontend doesn't support the runtime.SetCgoTraceback function,
    which is specifically for handling mixed Go and C tracebacks.
    Use a build tag to avoid compiling the runtime/testdata/testprogcgo
    files that refer to SetCgoTraceback. These files are not currently
    compiled anyhow, but they will be with a future gotools patch.
    
    Reviewed-on: https://go-review.googlesource.com/46452

From-SVN: r249556

    
    Building this test with gccgo requires an explicit -pthread option to
    be passed to the C compiler, so that it links against -lpthread.
    This test is not built today, but it will be soon with a future patch.
    
    Reviewed-on: https://go-review.googlesource.com/46451

From-SVN: r249555

	PR libstdc++/81173
	* include/bits/stl_bvector.h (vector<bool>::_M_initialize_value):
	Do not pass null pointer to memset.

From-SVN: r249554

tree-vect-loop.c (vect_model_reduction_cost): Handle COND_REDUCTION and INTEGER_INDUC_COND_REDUCTION without REDUC_MAX_EXPR...

2016-06-22  Richard Biener  <rguenther@suse.de>

	* tree-vect-loop.c (vect_model_reduction_cost): Handle
	COND_REDUCTION and INTEGER_INDUC_COND_REDUCTION without
	REDUC_MAX_EXPR support.
	(vectorizable_reduction): Likewise.
	(vect_create_epilog_for_reduction): Likewise.

	* gcc.dg/vect/pr65947-1.c: Remove xfail.
	* gcc.dg/vect/pr65947-2.c: Likewise.
	* gcc.dg/vect/pr65947-3.c: Likewise.
	* gcc.dg/vect/pr65947-4.c: Likewise.
	* gcc.dg/vect/pr65947-5.c: Likewise.
	* gcc.dg/vect/pr65947-6.c: Likewise.
	* gcc.dg/vect/pr65947-8.c: Likewise.
	* gcc.dg/vect/pr65947-9.c: Likewise.
	* gcc.dg/vect/pr65947-10.c: Likewise.
	* gcc.dg/vect/pr65947-12.c: Likewise.
	* gcc.dg/vect/pr65947-13.c: Likewise.
	* gcc.dg/vect/pr65947-14.c: Likewise.
	* gcc.dg/vect/vect-cond-2.c: Likewise.
	* gcc.dg/vect/vect-pr69848.c: Likewise.

From-SVN: r249553

2017-06-22  Martin Liska  <mliska@suse.cz>

	* gcc.dg/tree-ssa/ipa-split-5.c: Make function bigger in order
	to not inline it.

From-SVN: r249503

For the testcase in the patch:

  unsigned long
  f2 (unsigned long a, int b)
  {
    unsigned long x = 1UL << b;
    return a / x;
  }

We currently generate an unsigned division and a left shift, where
we could instead generate a right shift.

gcc/

2017-06-21  James Greenhalgh  <james.greenhalgh@arm.com>

	* match.pd (A / (1 << B) -> A >> B): New.
	* generic-match-head.c: Include optabs-tree.h.
	* gimple-match-head.c: Likewise.
	* optabs-tree.h (target_supports_op_p): New.
	* optabs-tree.c (target_supports_op_p): New.

gcc/testsuite/

2017-06-21  James Greenhalgh  <james.greenhalgh@arm.com>

	* gcc.dg/tree-ssa/forwprop-37.c: New.

From-SVN: r249502

2017-06-22  Richard Biener  <rguenther@suse.de>

	* gcc.dg/vect/pr65947-14.c: Fix missing brace.

From-SVN: r249501

2017-06-22  Richard Biener  <rguenther@suse.de>

	* gcc.dg/vect/pr65947-14.c: New testcase.

From-SVN: r249500

	* configure.ac (gcc_cv_ld_static_dynamic): Also check stderr for
	$gcc_cv_ld --help output.
	(gcc_cv_ld_demangle): Likewise.
	(gcc_cv_ld_eh_frame_hdr): Likewise.
	(gcc_cv_ld_pie): Likewise.
	(gcc_cv_ld_as_needed): Likewise.  Prefer native forms unless $gnu_ld.
	(gcc_cv_ld_buildid): Likewise.
	(gcc_cv_ld_sysroot): Likewise.
	(ld_bndplt_support): Likewise.
	(ld_pushpopstate_support): Likewise.
	* configure: Regenerate.
	* config/sol2.h [!USE_GLD] (SYSROOT_SPEC): Define.

From-SVN: r249496

    
    The gc toolchain does the same thing, in gentraceback in
    runtime/traceback.go.
    
    The test for this is TestPanicTraceback in runtime/crash_test.go.  We
    don't yet run that test, but we will in a future change.
    
    Reviewed-on: https://go-review.googlesource.com/46397

From-SVN: r249495

    
    The test for this is TestGoNil in the runtime package, which we don't
    run yet but will run with a subsequent gotools patch.
    
    Updates golang/go#8045
    
    Reviewed-on: https://go-review.googlesource.com/46392

From-SVN: r249494

From-SVN: r249492

    
    Patch by Uros Bizjak.
    
    Reviewed-on: https://go-review.googlesource.com/46391

From-SVN: r249487

    
    Update the code in Array_type::get_value_pointer that handles
    "lvalue" context to look for both regular var expressions
    and temp var expressions, since both can appear in array/slice
    index expressions on the left hand side of assignments.
    
    Reviewed-on: https://go-review.googlesource.com/46170

From-SVN: r249486

libgo: remove old MIPS architecture names
    
    This removes the old names for the 3 main MIPS ABIs: mipso32, mipsn32
    and mipsn64. It also removes the mipso64 ABI which has no equivalent
    architecture name in go. This ABI has been dead for sometime and I doubt
    anyone will miss it.
    
    Change-Id: I087b243784edf6705fdaf9c32e3233da5e387283

From-SVN: r249485

    
    This removes the old names for the 3 main MIPS ABIs: mipso32, mipsn32
    and mipsn64. It also removes the mipso64 ABI which has no equivalent
    architecture name in go. This ABI has been dead for sometime and I doubt
    anyone will miss it.
    
    Reviewed-on: https://go-review.googlesource.com/46154

From-SVN: r249477

    
    This means that the gc tools and gofrontend agree on the architecture names
    for the 3 MIPS ABIs which should allow a gofrontend compiler to build go.
    
    Reviewed-on: https://go-review.googlesource.com/46153

From-SVN: r249476

    
    Reviewed-on: https://go-review.googlesource.com/46152

From-SVN: r249475

    
    Rename getrandom_linux_mipsn32.go to use the new architecture name for
    the n32 ABI and enable building it on mips64p32 and mips64p32le.
    
    Reviewed-on: https://go-review.googlesource.com/46151

From-SVN: r249474