Encode all external symbol names using only ASCII alphanumeric
    characters, underscore, and dot.  Use a scheme that can be reliably
    demangled to a somewhat readable version as described in the long
    comment in names.cc.
    
    A minor cleanup discovered during this was that we were treating
    function types as different if one had a NULL parameters_ field and
    another has a non-NULL parameters_ field that has no parameters.  This
    worked because we mangled them slightly differently.  We now mangle
    them the same, so we treat them as equal, as we should anyhow.
    
    Reviewed-on: https://go-review.googlesource.com/89555

	* go.go-torture/execute/names-1.go: New test.

From-SVN: r257033

PR target/68467 is libgcc failing to build for m68k-linux-gnu
configured for ColdFire.

Jeff has an analysis in the PR identifying the problem as resulting
from the callers of libcalls with 1-byte or 2-byte arguments wanting
to push just 1 or 2 bytes on the stack, while the libcall
implementations have the normal C ABI and expect 4-byte arguments.
For normal C functions, I believe the TARGET_PROMOTE_PROTOTYPES
definition would ensure such arguments get passed as 4-byte, but that
does not apply for libcalls.

This patch fixes the issue by defining TARGET_PROMOTE_FUNCTION_MODE
for m68k.  The definition is conservative, only applying promotions in
the case of arguments to libcalls; otherwise it returns the unpromoted
type, which I believe matches what the default implementation of the
hook would have done on m68k.

I have tested that this fixes the libgcc build for ColdFire, and, in
conjunction with one glibc patch, this enables glibc to build cleanly
for ColdFire and to pass the compilation parts of the glibc testsuite
except for one test unrelated to this patch (while glibc and the
compilation parts of the testsuite continue to build OK for
non-ColdFire m68k, as expected).  I have *not* run any GCC tests for
this patch, or any execution tests for m68k.

	PR target/68467
	* config/m68k/m68k.c (m68k_promote_function_mode): New function.
	(TARGET_PROMOTE_FUNCTION_MODE): New macro.

From-SVN: r257032

	PR target/83994
	* i386.c (get_probe_interval): Move to earlier point.
	(ix86_compute_frame_layout): If -fstack-clash-protection and
	the frame is larger than the probe interval, then use pushes
	to save registers rather than reg->mem moves.
	(ix86_expand_prologue): Remove conditional for int_registers_saved
	assertion.

	PR target/83994
	* gcc.target/i386/pr83994.c: New test.

From-SVN: r257031

2018-01-24  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/84014
	* ira-build.c (setup_min_max_allocno_live_range_point): Set up
	min/max for never referenced object.

2018-01-24  Vladimir Makarov  <vmakarov@redhat.com>

	PR target/84014
	* gcc.target/powerpc/pr84014.c: New.

From-SVN: r257029

	PR middle-end/83977
	* tree.c (free_lang_data_in_decl): Don't clear DECL_ABSTRACT_ORIGIN
	here.
	* omp-low.c (create_omp_child_function): Remove "omp declare simd"
	attributes from DECL_ATTRIBUTES (decl) without affecting
	DECL_ATTRIBUTES (current_function_decl).
	* omp-simd-clone.c (expand_simd_clones): Ignore DECL_ARTIFICIAL
	functions with non-NULL DECL_ABSTRACT_ORIGIN.

	* c-c++-common/gomp/pr83977-1.c: New test.
	* c-c++-common/gomp/pr83977-2.c: New test.
	* c-c++-common/gomp/pr83977-3.c: New test.
	* gfortran.dg/gomp/pr83977.f90: New test.

From-SVN: r257023

The failures in this PR were from forcing { dg-do run } even when
vect.exp chooses options that are incompatible with the runtime.
The default vect.exp behaviour is to execute when possible, so there's
no need for a dg-do at all.

The patch removes other unconditional { dg-do run }s too.  Many of them
were already failing in the same way.

Also, the dg-do run condition in vect-reduc-or* seems unnecessary:
the test should run correctly whatever happens, and the scan tests
are already guarded properly.

2018-01-24  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/testsuite/
	PR testsuite/83889
	* gcc.dg/vect/pr79920.c: Remove explicit dg-do run.
	* gcc.dg/vect/pr80631-1.c: Likewise.
	* gcc.dg/vect/pr80631-2.c: Likewise.
	* gcc.dg/vect/pr81410.c: Likewise.
	* gcc.dg/vect/pr81633.c: Likewise.
	* gcc.dg/vect/pr81815.c: Likewise.
	* gcc.dg/vect/pr82108.c: Likewise.
	* gcc.dg/vect/pr83857.c: Likewise.
	* gcc.dg/vect/vect-alias-check-8.c: Likewise.
	* gcc.dg/vect/vect-alias-check-9.c: Likewise.
	* gcc.dg/vect/vect-alias-check-10.c: Likewise.
	* gcc.dg/vect/vect-alias-check-11.c: Likewise.
	* gcc.dg/vect/vect-alias-check-12.c: Likewise.
	* gcc.dg/vect/vect-reduc-11.c: Likewise.
	* gcc.dg/vect/vect-tail-nomask-1.c: Likewise.
	* gcc.dg/vect/vect-reduc-in-order-1.c: Remove dg-do run and use
	dg-xfail-run-if instead.
	* gcc.dg/vect/vect-reduc-in-order-2.c: Likewise.
	* gcc.dg/vect/vect-reduc-in-order-3.c: Likewise.
	* gcc.dg/vect/vect-reduc-in-order-4.c: Likewise.
	* gcc.dg/vect/vect-reduc-or_1.c: Remove conditional dg-do run.
	* gcc.dg/vect/vect-reduc-or_2.c: Likewise.

From-SVN: r257022

r255913 changed some constant_boolean_node calls to boolean_true_node
and boolean_false_node, which meant that the returned tree didn't
always have the right type.

2018-01-24  Richard Sandiford  <richard.sandiford@linaro.org>

gcc/
	PR tree-optimization/83979
	* fold-const.c (fold_comparison): Use constant_boolean_node
	instead of boolean_{true,false}_node.

gcc/testsuite/
	PR tree-optimization/83979
	* g++.dg/pr83979.c: New test.

From-SVN: r257021

	* ipa-profile.c (ipa_propagate_frequency_1): Fix logic skipping calls
	with zero counts.

From-SVN: r257020

2018-01-24  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.md (*call_indirect_nonlocal_sysv<mode>):
	Simplify the clause that sets the length attribute.
	(*call_value_indirect_nonlocal_sysv<mode>): Likewise.
	(*sibcall_nonlocal_sysv<mode>): Clean up code block; simplify the
	clause that sets the length attribute.
	(*sibcall_value_nonlocal_sysv<mode>): Likewise.

From-SVN: r257019

	* pt.c (extract_fnparm_pack, tsubst_pack_expansion): Handle
	unsubstituted function parameter pack.

From-SVN: r257018

This test fails on arm hardfloat targets because it sets an explicit -mfloat-abi=softfp.
The usual approach to setting the NEON options is to use dg-add-options arm_neon.
But in the lto tests we don't have that framework, we can only set them explicitly with dg-lto-options.

The solution is to remove the explicit -mfloat-abi=softfp and instead add an effective target check
for arm_neon_ok_no_float_abi that makes sure we only run this test if -mfpu=neon is enough to get NEON
without any -mfloat-abi options. In fact, this is what the comment above check_effective_target_arm_neon_ok_no_float_abi_nocache
recommends for lto tests.

That way on my hardfloat toolchain the test doesn't try to link the softfp binary against a hard-float runtime/test glue
and all is good. I've tested that the test is appropriately skipped when testing a --with-float=soft toolchain.


     * gcc.dg/lto/20110201-1_0.c: Remove explicit -mfloat-abi=softfp
     option.  Add arm_neon_ok_no_float_abi check.

From-SVN: r257017

2018-01-24  Tom de Vries  <tom@codesourcery.com>

	PR target/83589
	* config/nvptx/nvptx.c (WORKAROUND_PTXJIT_BUG_2): Define to 1.
	(nvptx_pc_set, nvptx_condjump_label): New function. Copy from jump.c.
	Add strict parameter.
	(prevent_branch_around_nothing): Insert dummy insn between branch to
	label and label with no ptx insn inbetween.
	* config/nvptx/nvptx.md (define_insn "fake_nop"): New insn.

	* testsuite/libgomp.oacc-c-c++-common/pr83589.c: New test.

From-SVN: r257016

2018-01-24  Tom de Vries  <tom@codesourcery.com>

	PR target/81352
	* config/nvptx/nvptx.c (nvptx_single): Add exit insn after noreturn call
	for neutered threads in warp.
	* config/nvptx/nvptx.md (define_insn "exit"): New insn.

	* testsuite/libgomp.oacc-fortran/pr81352.f90: New test.

From-SVN: r257014

re PR tree-optimization/83176 ([graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206)

2018-01-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83176
	* tree-chrec.c (chrec_fold_plus_1): Handle (signed T){(T) .. }
	operands.

	* gcc.dg/graphite/pr83176.c: New testcase.

From-SVN: r257013

re PR tree-optimization/82819 ([graphite] ICE in set_codegen_error, at graphite-isl-ast-to-gimple.c:206)

2018-01-24  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/82819
	* graphite-isl-ast-to-gimple.c (binary_op_to_tree): Avoid
	code generating pluses that are no-ops in the target precision.

	* gcc.dg/graphite/pr82819.c: New testcase.

From-SVN: r257012

2018-01-24  Richard Biener  <rguenther@suse.de>

	PR middle-end/84000
	* tree-cfg.c (replace_loop_annotate): Handle annot_expr_parallel_kind.

From-SVN: r257011

	* cfgcleanup.c (try_crossjump_to_edge): Use combine_with_count
	to merge probabilities.
	* predict.c (probably_never_executed): Also mark as cold functions
	with global 0 profile and guessed local profile.
	* profile-count.c (profile_probability::combine_with_count): New
	member function.
	* profile-count.h (profile_probability::operator*,
	profile_probability::operator*=, profile_probability::operator/,
	profile_probability::operator/=): Reduce precision to adjusted
	and set value to guessed on contradictory divisions.
	(profile_probability::combine_with_freq): Remove.
	(profile_probability::combine_wiht_count): Declare.
	(profile_count::force_nonzero):: Set to adjusted.
	(profile_count::probability_in):: Set quality to adjusted.
	* tree-ssa-tail-merge.c (replace_block_by): Use
	combine_with_count.

From-SVN: r257010

/cp
2018-01-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/83921
	* decl.c (check_for_uninitialized_const_var): Not static; add
	bool and tsubst_flags_t parameters; adjust to be used both in
	constexpr context and not.
	* constexpr.c (potential_constant_expression_1): Use the above.
	* cp-tree.h (check_for_uninitialized_const_var): Declare.

/testsuite
2018-01-23  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/83921
	* g++.dg/cpp1y/constexpr-83921-1.C: New.
	* g++.dg/cpp1y/constexpr-83921-2.C: Likewise.
	* g++.dg/cpp1y/constexpr-83921-3.C: Likewise.
	* g++.dg/ext/stmtexpr20.C: Likewise.
	* g++.dg/ext/stmtexpr21.C: Likewise.

From-SVN: r257009

From-SVN: r257008

	2018-01-23  Andrew Waterman  <andrew@sifive.com>
	gcc/
	* config/riscv/riscv.c (riscv_stack_boundary): New.
	(riscv_option_override): Set riscv_stack_boundary.  Handle
	riscv_preferred_stack_boundary_arg.
	* config/riscv/riscv.h (MIN_STACK_BOUNDARY, ABI_STACK_BOUNDARY): New.
	(BIGGEST_ALIGNMENT): Set to STACK_BOUNDARY.
	(STACK_BOUNDARY): Set to riscv_stack_boundary.
	(RISCV_STACK_ALIGN): Use STACK_BOUNDARY.
	* config/riscv/riscv.opt (mpreferred-stack-boundary): New.
	* doc/invoke.tex (RISC-V Options): Add -mpreferred-stack-boundary.

Co-Authored-By: Jim Wilson <jimw@sifive.com>

From-SVN: r257005

libgcc/
2018-01-23  Max Filippov  <jcmvbkbc@gmail.com>

	* config/xtensa/ieee754-df.S (__addsf3, __subsf3, __mulsf3)
	(__divsf3): Make NaN return value quiet.
	* config/xtensa/ieee754-sf.S (__adddf3, __subdf3, __muldf3)
	(__divdf3): Make NaN return value quiet.

From-SVN: r257002

From-SVN: r257001

	* pt.c (do_auto_deduction): Don't deduce from an auto decl.
	* decl.c (undeduced_auto_decl): Limit to vars and fns.

From-SVN: r257000

gcc/cp/ChangeLog:
	PR c++/83974
	* pt.c (tsubst_copy_and_build) <CONSTRUCTOR>: Remove early bailout
	for pointer to member function types.

gcc/testsuite/ChangeLog:
	PR c++/83974
	* g++.dg/warn/pr83974.C: New test case.

From-SVN: r256999

	PR sanitizer/83987
	* tree.c (cp_free_lang_data): Change DECL_VALUE_EXPR of
	DECL_OMP_PRIVATIZED_MEMBER vars to error_mark_node.

	* g++.dg/ubsan/pr83987.C: New test.

From-SVN: r256997

We can use const reference of struct ix86_frame to avoid making a local
copy of ix86_frame.  ix86_expand_epilogue makes a local copy of struct
ix86_frame and uses the reg_save_offset field as a local variable.  This
patch uses a separate local variable for reg_save_offset.

Tested on x86-64 with ada.

	PR target/83905
	* config/i386/i386.c (ix86_expand_prologue): Use cost reference
	of struct ix86_frame.
	(ix86_expand_epilogue): Likewise.  Add a local variable for
	the reg_save_offset field in struct ix86_frame.

From-SVN: r256996

2018-23-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83866
	* decl.c (gfc_match_derived_decl): If eos not matched, recover
	and emit error about garbage after declaration.

2018-23-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83866
	* gfortran.dg/pdt_29.f03 : New test.

From-SVN: r256995

2018-23-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83898
	* trans-stmt.c (trans_associate_var): Do not set cst_array_ctor
	for characters.

2018-23-01  Paul Thomas  <pault@gcc.gnu.org>

	PR fortran/83898
	* gfortran.dg/associate_33.f03 : New test.

From-SVN: r256994

re PR tree-optimization/82604 (SPEC CPU2006 410.bwaves ~50% performance regression with trunk@253679 when ftree-parallelize-loops is used)

	PR tree-optimization/82604
	* tree-loop-distribution.c (enum partition_kind): New enum item
	PKIND_PARTIAL_MEMSET.
	(partition_builtin_p): Support above new enum item.
	(generate_code_for_partition): Ditto.
	(compute_access_range): Differentiate cases that equality can be
	proven at all loops, the innermost loops or no loops.
	(classify_builtin_st, classify_builtin_ldst): Adjust call to above
	function.  Set PKIND_PARTIAL_MEMSET for partition appropriately.
	(finalize_partitions, distribute_loop): Don't fuse partition of
	PKIND_PARTIAL_MEMSET kind when distributing 3-level loop nest.
	(prepare_perfect_loop_nest): Distribute 3-level loop nest only if
	parloop is enabled.

From-SVN: r256990

2018-01-23  Martin Liska  <mliska@suse.cz>

	PR lto/81440
	* lto-symtab.c (lto_symtab_merge): Handle and do not warn about
	trailing arrays at the end of a struct.
2018-01-23  Martin Liska  <mliska@suse.cz>

	PR lto/81440
	* gcc.dg/lto/pr81440.h: New test.
	* gcc.dg/lto/pr81440_0.c: New test.
	* gcc.dg/lto/pr81440_1.c: New test.

From-SVN: r256989

2018-01-23  Martin Liska  <mliska@suse.cz>

	* predict.def (PRED_INDIR_CALL): Set probability to PROB_EVEN in
	order to ignore the predictor.
	(PRED_POLYMORPHIC_CALL): Likewise.
	(PRED_RECURSIVE_CALL): Likewise.

From-SVN: r256988

https://gcc.gnu.org/ml/gcc-patches/2018-01/msg01954.html
	PR c++/83988
	* pt.c (tsubst_baselink): Remove optype assert.
	* ptree.c (cxx_print_xnode): <case BASELINK> Print BASELINK_OPTYPE.

	PR c++/83988
	* g++.dg/template/pr83988.C: New.

From-SVN: r256986

	PR c++/82882
	PR c++/83978
	* g++.dg/cpp0x/pr82882.C: New test.
	* g++.dg/cpp0x/pr83978.C: New test.

From-SVN: r256985

	PR c++/83958
	* decl.c (cp_finish_decomp): Diagnose if reference structure binding
	refers to incomplete type.

	* g++.dg/cpp1z/decomp35.C: New test.

From-SVN: r256984

2018-01-23  Martin Liska  <mliska@suse.cz>

	* tree-profile.c (tree_profiling): Print function header to
	aware reader which function we are working on.
	* value-prof.c (gimple_find_values_to_profile): Do not print
	not interesting value histograms.

From-SVN: r256983

2018-01-22  Martin Liska  <mliska@suse.cz>

	* profile-count.h (enum profile_quality): Add
	profile_uninitialized as the first value. Do not number values
	as they are zero based.
	(profile_count::verify): Update sanity check.
	(profile_probability::verify): Likewise.

From-SVN: r256982

https://gcc.gnu.org/ml/gcc-patches/2018-01/msg01940.html
	gcc/cp/
	Deprecate ARM-era for scope handling
	* decl.c (poplevel): Flag_new_for_scope is a boolean-like.
	(cxx_init_decl_processing): Deprecate flag_new_for_scope being
	cleared.
	* name-lookup.c (check_for_out_of_scope_variable): Deprecate and
	cleanup handling.
	* semantics.c (begin_for_scope): Flag_new_for_scope is
	boolean-like.
	(finish_for_stmt, begin_range_for_stmt): Likewise.

	gcc/
	* doc/invoke.texi (ffor-scope): Deprecate.

	gcc/cp/
	* g++.dg/cpp0x/range-for10.C: Adjust.
	* g++.dg/ext/forscope1.C: Adjust.
	* g++.dg/ext/forscope2.C: Adjust.
	* g++.dg/template/for1.C: Adjust.

From-SVN: r256981

PR tree-optimization/83510 reports that r255649 (for
PR tree-optimization/83312) introduced a false positive for
-Warray-bounds for array accesses within certain switch statements:
those for which value-ranges allow more than one case to be reachable,
but for which one or more of the VR-unreachable cases contain
out-of-range array accesses.

In the reproducer, after the switch in f is inlined into g, we have 3 cases
for the switch (case 9, case 10-19, and default), within a loop that
ranges from 0..9.

With both the old and new code, vr_values::simplify_switch_using_ranges clears
the EDGE_EXECUTABLE flag on the edge to the "case 10-19" block.  This
happens during the dom walk within the substitute_and_fold_engine.

With the old code, the clearing of that EDGE_EXECUTABLE flag led to the
      /* Skip blocks that were found to be unreachable.  */
code in the old implementation of vrp_prop::check_all_array_refs skipping
the "case 10-19" block.

With the new code, we have a second dom walk, and that dom_walker's ctor
sets all edges to be EDGE_EXECUTABLE, losing that information.

Then, dom_walker::before_dom_children (here, the subclass'
check_array_bounds_dom_walker::before_dom_children) can return one edge, if
there's a unique successor edge, and dom_walker::walk filters the dom walk
to just that edge.

Here we have two VR-valid edges (case 9 and default), and an VR-invalid
successor edge (case 10-19).  There's no *unique* valid successor edge,
and hence taken_edge is NULL, and the filtering in dom_walker::walk
doesn't fire.

Hence we've lost the filtering of the "case 10-19" BB, hence the false
positive.

The issue is that we have two dom walks: first within vr_values'
substitute_and_fold_dom_walker (which has skip_unreachable_blocks == false),
then another within vrp_prop::check_all_array_refs (with
skip_unreachable_blocks == true).

Each has different "knowledge" about ruling out edges due to value-ranges,
but we aren't combining that information.  The former "knows" about
out-edges at a particular control construct (e.g. at a switch), the latter
"knows" about dominance, but only about unique successors (hence the
problem when two out of three switch cases are valid).

This patch combines the information by preserving the EDGE_EXECUTABLE
flags from the first dom walk, and using it in the second dom walk,
potentially rejecting additional edges.

Doing so fixes the false positive.

I attempted an alternative fix, merging the two dom walks into one, but
that led to crashes in identify_jump_threads, so I went with this, as
a less invasive fix.

gcc/ChangeLog:
	PR tree-optimization/83510
	* domwalk.c (set_all_edges_as_executable): New function.
	(dom_walker::dom_walker): Convert bool param
	"skip_unreachable_blocks" to enum reachability.  Move setup of
	edge flags to set_all_edges_as_executable and only do it when
	reachability is REACHABLE_BLOCKS.
	* domwalk.h (enum dom_walker::reachability): New enum.
	(dom_walker::dom_walker): Convert bool param
	"skip_unreachable_blocks" to enum reachability.
	(set_all_edges_as_executable): New decl.
	* graphite-scop-detection.c  (gather_bbs::gather_bbs): Convert
	from false for "skip_unreachable_blocks" to ALL_BLOCKS for
	"reachability".
	* tree-ssa-dom.c (dom_opt_dom_walker::dom_opt_dom_walker): Likewise,
	but converting true to REACHABLE_BLOCKS.
	* tree-ssa-sccvn.c (sccvn_dom_walker::sccvn_dom_walker): Likewise.
	* tree-vrp.c
	(check_array_bounds_dom_walker::check_array_bounds_dom_walker):
	Likewise, but converting it to REACHABLE_BLOCKS_PRESERVING_FLAGS.
	(vrp_dom_walker::vrp_dom_walker): Likewise, but converting it to
	REACHABLE_BLOCKS.
	(vrp_prop::vrp_finalize): Call set_all_edges_as_executable
	if check_all_array_refs will be called.

gcc/testsuite/ChangeLog:
	PR tree-optimization/83510
	* gcc.c-torture/compile/pr83510.c: New test case.

From-SVN: r256980

gcc/ChangeLog:
	* tree.c (selftest::test_location_wrappers): Add more test
	coverage.

From-SVN: r256979

"make selftest-valgrind" shows a few leaks in sbitmap.c's selftests;
this patch fixes them.

gcc/ChangeLog:
	* sbitmap.c (selftest::test_set_range): Fix memory leaks.
	(selftest::test_bit_in_range): Likewise.

From-SVN: r256978