2017-12-04  Steve Ellcey  <sellcey@cavium.com>

	* Makefile.am (ARCH_AARCH64_LINUX): Add IFUNC_OPTIONS and
	libatomic_la_LIBADD.
	* config/linux/aarch64/host-config.h: New file.
	* configure.ac (IFUNC_RESOLVER_ARGS): Define.
	(ARCH_AARCH64_LINUX): New conditional for IFUNC builds.
	* configure.tgt (aarch64): Set ARCH and try_ifunc.
	(aarch64*-*-linux*) Update config_path.
	(aarch64*-*-linux*) Set IFUNC_RESOLVER_ARGS.
	* libatomic_i.h (GEN_SELECTOR): Add IFUNC_RESOLVER_ARGS argument.
	* Makefile.in: Regenerate.
	* auto-config.h.in: Regenerate.
	* configure: Regenerate.

From-SVN: r255399

From-SVN: r255398

	PR target/81616
	* athlon.md: Disable for generic.
	* haswell.md: Enable for generic.
	* i386.c (ix86_sched_init_global): Add core hooks for generic.
	* x86-tune-sched.c (ix86_issue_rate): Increase issue rate for generic
	to 4.
	(ix86_adjust_cost): Move generic to haswell path.

From-SVN: r255395

	* config/sparc/sparc.c (sparc_do_work_around_errata): Use mem_ref
	instead of MEM_P in a couple more places.  Fix formatting issues.

From-SVN: r255393

	* include/bits/regex_compiler.tcc: Use C-style comment to work around
	PR preprocessor/61638.
	(__INSERT_REGEX_MATCHER): Replace GNU extension with __VA_ARGS__.

From-SVN: r255392

	* config/io/basic_file_stdio.h (__basic_file): Remove name of unused
	parameter.
	* include/bits/boost_concept_check.h: Add pragmas to disable
	-Wunused-local-typedef warnings.
	* include/bits/codecvt.h (codecvt_byname<char16_t, char, mbstate_t>)
	(codecvt_byname<char32_t, char, mbstate_t>): Remove name of unused
	parameter.
	* include/bits/locale_facets_nonio.tcc (time_get::do_get_weekday)
	(time_get::do_get_monthname, time_get::do_get_year): Remove unused
	variables.
	* include/std/bitset (_Base_bitset<0>::_M_getword): Remove name of
	unused parameter.
	* include/std/streambuf (_IsUnused): Define.
	(basic_streambuf::imbue, basic_streambuf::pbackfail)
	(basic_streambuf::overflow): Add macro to unused parameters.
	* testsuite/24_iterators/operations/prev_neg.cc: Adjust dg-error.

From-SVN: r255391

	* semantics.c (finish_if_stmt_cond): Use require_constant_expression
	rather than is_constant_expression.
	* constexpr.c (potential_constant_expression_1) [LAMBDA_EXPR]: Allow
	in C++17.

From-SVN: r255390

	gcc/
	* config/riscv/riscv.c (riscv_for_each_saved_reg): Use GP_REG_LAST
	instead of GP_REG_LAST-1.
	(riscv_adjust_libcall_cfi_prologue): Likewise.
	(riscv_adjust_libcall_cri_epilogue): Likewise.
	* config/riscv/riscv.h (CALL_USED_REGISTERS): Change a6 to t6 in
	comment.

From-SVN: r255389

I noticed the debugging output from local-pure-const pass is missing a
newline in a couple places, leading to this:

 local analysis of main
   scanning: i ={v} 0;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure  scanning: j ={v} 20;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure  scanning: vol.0_10 ={v} i;
    Volatile stmt is not const/pure

It should've been:

 local analysis of main
   scanning: i ={v} 0;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure
   scanning: j ={v} 20;
    Volatile stmt is not const/pure
    Volatile operand is not const/pure
   scanning: vol.0_10 ={v} i;
    Volatile stmt is not const/pure

gcc/ChangeLog:

2017-12-04  Luis Machado  <luis.machado@linaro.org>

	* ipa-pure-const.c (check_decl): Add missing newline.
	(state_from_flags): Likewise.

From-SVN: r255388

	PR tree-optimizatin/78496
	* gimple-ssa-evrp-analyze.h
	(evrp_range_analyzer::get_vr_values): Simplify.
	* gimple-ssa-evrp-analyze.c: Corresponding changes.
	* tree-ssa-dom.c: Include alloc-pool.h, tree-vrp.h, vr-values.h
	and gimple-ssa-evrp-analyze.h.
	(dom_opt_dom_walker class): Add evrp_range_analyzer member.
	(simplify_stmt_for_jump_threading): Copy a blob of code from
	tree-vrp.c to use ranges to simplify statements.
	(dom_opt_dom_walker::before_dom_children): Call
	evrp_range_analyzer::{enter,record_ranges_from_stmt} methods.
	(dom_opt_dom_walker::after_dom_children): Similarly for
	evrp_range_analyzer::leave.
	(dom_opt_dom_walker::optimize_stmt): Use EVRP ranges to optimize
	conditionals.

	PR tree-optimization/78496
	* gcc.dg/builtin-unreachable-6.c: Disable DOM.
	* gcc.dg/builtin-unreachable-6a.c: New test.
	* gcc.dg/tree-ssa/20030922-1.c: No longer XFAIL.
	* gcc.dg/ssa-dom-branch-1.c: Tweak expected output.

From-SVN: r255387

	(evrp_range_analyzer::extract_range_from_stmt):  Always use
	vr_values::update_value_range so preexisting range info is
	medged with new range info, even if the new range is VR_VARYING.

From-SVN: r255386

This removes use_crosses_set_p, and uses modified_between_p instead
everywhere it was used.  This improves optimisation.


	* combine.c: Adjust comment.
	(use_crosses_set_p): Delete.
	(can_combine_p): Use modified_between_p instead of use_crosses_set_p.
	(try_combine): Ditto.

From-SVN: r255384

2017-12-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83255
	* graphite-isl-ast-to-gimple.c (translate_isl_ast_node_for):
	Re-add zero-iteration check.

	* gcc.dg/graphite/pr83255.c: New testcase.

From-SVN: r255382

The Newlib time_t has now 64 bits for RTEMS.

gcc/ada

	* gcc-interface/Makefile.in (RTEMS): Use s-osprim__rtems.adb.
	* libgnat/s-osprim__rtems.adb: New file.
	* libgnarl/s-osinte__rtems.adb (pthread_cond_t): Fix alignment.
	(pthread_mutexattr_t): Likewise.
	(pthread_rwlockattr_t): Likewise.
	(pthread_rwlock_t): Likewise.
	(time_t): Use 64-bit integer.

From-SVN: r255380

The documentation (rtl.texi) says:

  When a @code{clobber} expression for a register appears inside a
  @code{parallel} with other side effects, the register allocator
  guarantees that the register is unoccupied both before and after that
  insn if it is a hard register clobber.

and at least the rs6000 backend relies on that (see PR83245).  This
patch restores that behaviour.

Registers that are also used as operands in the instruction are not
treated as earlyclobber, so such insns also still work (PR80818, an
s390 testcase).


	PR rtl-optimization/83245
	* lra.c (collect_non_operand_hard_regs): Treat clobbers of non-operand
	hard registers as earlyclobber, also if not in an asm.

From-SVN: r255377

	PR bootstrap/83265
	Revert
	2017-12-01  Segher Boessenkool  <segher@kernel.crashing.org>

	PR target/43871
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
	rs6000_cpu based on cpu_index, not tune_index.

From-SVN: r255376

re PR tree-optimization/83238 ([graphite] ICE in graphite_can_represent_scev, at graphite-scop-detection.c:971)

2017-12-04  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/83238
	* graphite-scop-detection.c (scop_detection::merge_sese): Make
	code match comment, rejecting invalid SESE regions.

	* gcc.dg/graphite/pr83238.c: New testcase.

From-SVN: r255375

2017-12-04  Tom de Vries  <tom@codesourcery.com>

	* gcc.dg/pr82875.c: Require effective target alloca.

From-SVN: r255374

From-SVN: r255372

	* config/pa/pa.c (pa_legitimate_address_p): For scaled indexing,
	require base operand is a REG_POINTER prior to reload on targets
	with non-equivalent space registers.

From-SVN: r255369

2017-12-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36313
	* check.c (gfc_check_minval_maxval): Use
	int_orLreal_or_char_check_f2003 for array argument.
	* iresolve.c (gfc_resolve_maxval): Insert number in
	function name for character arguments.
	(gfc_resolve_minval): Likewise.
	* trans-intrinsic.c (gfc_conv_intrinsic_minmaxloc):
	Fix comment.
	(gfc_conv_intrinsic_minmaxval): Resort arguments and call library
	function if dealing with a character function.

2017-12-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36313
	* Makefile.am: Add new files for character-valued
	maxval and minval.
	* Makefile.in: Regenerated.
	* gfortran.map: Add new functions.
	* m4/iforeach-s2.m4: New file.
	* m4/ifunction-s2.m4: New file.
	* m4/iparm.m4: Add intitval for minval and maxval.
	* m4/maxval0s.m4: New file.
	* m4/maxval1s.m4: New file.
	* m4/minval0s.m4: New file.
	* m4/minval1s.m4: New file.
        * generated/maxval0_s1.c: New file.
        * generated/maxval0_s4.c: New file.
        * generated/maxval1_s1.c: New file.
        * generated/maxval1_s4.c: New file.
        * generated/minval0_s1.c: New file.
        * generated/minval0_s4.c: New file.
        * generated/minval1_s1.c: New file.
        * generated/minval1_s4.c: New file.

2017-12-03  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/36313
	* gfortran.dg/maxval_char_1.f90: New test.
	* gfortran.dg/maxval_char_2.f90: New test.
	* gfortran.dg/maxval_char_3.f90: New test.
	* gfortran.dg/maxval_char_4.f90: New test.
	* gfortran.dg/minval_char_1.f90: New test.
	* gfortran.dg/minval_char_2.f90: New test.
	* gfortran.dg/minval_char_3.f90: New test.
	* gfortran.dg/minval_char_4.f90: New test.

From-SVN: r255367

From-SVN: r255366

2017-12-03  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
            Dominique d'Humieres  <dominiq@lps.ens.fr>

        PR libgfortran/83191
        * io/transfer.c (list_formatted_read_scalar): Do not set
        namelist_mode bit here. (namelist_read): Likewise.
        (data_transfer_init): Clear the mode bit here.
        (finalize_transfer): Do set the mode bit just before any calls
        to namelist_read or namelist_write. It can now be referred to
        in complex_write.
        ^ io/write.c (write_complex): Suppress the leading blanks when
        namelist_mode bit is not set to 1.

        * gfortran.dg/namelist_95.f90: New test.

Co-Authored-By: Dominique d'Humieres <dominiq@lps.ens.fr>

From-SVN: r255365

From-SVN: r255363

2017-12-02  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR libgfortran/83225
	* io/io.h (is_internal_unit): Use the unit_is_internal bit.
	* io/transfer.c (data_transfer_init): Set the bit to true for
	internal umits. Use that bit for checks for internal unit
	initializations.
	* io/unit.c (insert_unit): As a precaution, set the
	internal_unit_kind to zero when a unit structure is first created.

From-SVN: r255362

From-SVN: r255361

	* ipa-cp.c (ipcp_lattice<valtype>::print): Update dumping.
	(update_specialized_profile): Fix updating of counts.
	(perhaps_add_new_callers): Likewise.

From-SVN: r255358

	PR target/81616
	* x86-tune.def: Remove obsolette FIXMEs.
	(X86_TUNE_PARTIAL_FLAG_REG_STALL): Disable for generic
	(X86_TUNE_FUSE_CMP_AND_BRANCH_32, X86_TUNE_FUSE_CMP_AND_BRANCH_64,
	X86_TUNE_FUSE_CMP_AND_BRANCH_SOFLAGS, X86_TUNE_FUSE_ALU_AND_BRANCH):
	Enable for generic.
	(X86_TUNE_PAD_RETURNS): Disable for generic.
	* gcc.target/i386/pad-1.c: Compile for amdfam10.
	* gcc.target/i386/align-limit.c: Likewise.

From-SVN: r255357

	PR tree-optimization/83170
	PR tree-optimization/83241
	* gimple-ssa-store-merging.c
	(imm_store_chain_info::try_coalesce_bswap): Update vuse field from
	gimple_vuse (ins_stmt) in case it has changed.
	(imm_store_chain_info::output_merged_store): Likewise.

	* gcc.dg/store_merging_17.c: New test.

From-SVN: r255356

	* tree-chkp.c (chkp_compute_bounds_for_assignment): Handle
	POINTER_DIFF_EXPR.

	* gcc.target/i386/mpx/pointer-diff-1.c: New test.

From-SVN: r255355

	PR c++/81212
	* tree-cfg.c (pass_warn_function_return::execute): Handle
	__builtin_ubsan_handle_missing_return like __builtin_unreachable
	with BUILTINS_LOCATION.

	* g++.dg/ubsan/pr81212.C: New test.
	* g++.dg/ubsan/return-1.C: Add -Wno-return-type to dg-options.
	* g++.dg/ubsan/return-2.C: Likewise.
	* g++.dg/ubsan/return-7.C: Likewise.

From-SVN: r255354

	PR target/78643
	PR target/80583
	* expr.c (get_inner_reference): If DECL_MODE of a non-bitfield
	is BLKmode for vector field with vector raw mode, use TYPE_MODE
	instead of DECL_MODE.

	* gcc.target/i386/pr80583.c: New test.

From-SVN: r255353

	* config/i386/i386-protos.h (standard_sse_constant_opcode): Change
	last argument to rtx pointer.
	* config/i386/i386.c (standard_sse_constant_opcode): Replace X argument
	with OPERANDS.  For AVX+ 128-bit VEX encoded instructions over 256-bit
	or 512-bit.  If setting EXT_REX_SSE_REG_P, use EVEX encoded insn
	depending on the chosen ISAs.
	* config/i386/i386.md (*movxi_internal_avx512f, *movoi_internal_avx,
	*movti_internal, *movdi_internal, *movsi_internal, *movtf_internal,
	*movdf_internal, *movsf_internal): Adjust standard_sse_constant_opcode
	callers.
	* config/i386/sse.md (mov<mode>_internal): Likewise.
	* config/i386/mmx.md (*mov<mode>_internal): Likewise.

From-SVN: r255352

	* doc/invoke.texi (-dp): Say that instruction cost is printed as well.

From-SVN: r255351

This improves the output for load and store fusion a little.  In most
cases it removes the comment output, because that makes the generated
assembler code hard to read, and equivalent info is available with -dp
anyway.  For the vector loads it puts the comment on the second insn,
where it doesn't interfere with other debug comments.


	* config/rs6000/rs6000-protos.h (emit_fusion_addis): Remove last two
	parameters from prototype.
	* config/rs6000/rs6000.c (emit_fusion_addis): Remove last two
	parameters.  Don't print a comment.
	(emit_fusion_gpr_load): Adjust.
	(emit_fusion_load_store): Adjust.
	* config/rs6000/rs6000.md (*fusion_p9_<mode>_constant): Adjust.
	* config/rs6000/vsx.md (two peepholes): Print the "vector load fusion"
	comment on the second line.

gcc/testsuite/
	* gcc.target/powerpc/fusion.c: Add -dp to options.  Adjust the expected
	output.
	* gcc.target/powerpc/fusion3.c: Ditto.
	* gcc.target/powerpc/fusion4.c: Ditto.

From-SVN: r255350

We set rs6000_cpu based on tune_index, but it should be cpu_index.
This patch fixes it.


	PR target/43871
	* config/rs6000/rs6000.c (rs6000_option_override_internal): Set
	rs6000_cpu based on cpu_index, not tune_index.

From-SVN: r255349

This improves the assembler output (for -dp and -fverbose-asm) in
several ways.  It always prints the insn_cost.  It does not print
"[length = NN]" but "[c=NN l=NN]", to save space.  It does not add one
to the instruction alternative number (everything else starts counting
those at 0, too).  And finally, it tries to keep things lined up in
columns a bit better.


	* final.c (output_asm_name): Print insn_cost.  Shorten output.  Print
	which_alternative instead of which_alternative + 1.
	(output_asm_insn): Print an extra tab if the template is short.

From-SVN: r255348

    
    The functions cgoCheckPointer and cgoCheckResult are called by code
    generated by cgo. That means that we need to export them using
    go:linkname, as otherwise they are local symbols. The cgo code
    currently uses weak references to only call the symbols if they are
    defined, which is why it has been working--the cgo code has not been
    doing any checks.
    
    Reviewed-on: https://go-review.googlesource.com/80295

From-SVN: r255347

    
    GCC has started emitting "control reaches end of non-void function"
    warnings. Avoid them for Go by 1) marking the builtin function panic
    and the compiler-generated function __go_runtime_error as not
    returning and 2) adding a default case to the switch used for select
    statements that simply calls __builtin_unreachable.
    
    Fixes golang/go#22767
    
    Reviewed-on: https://go-review.googlesource.com/80416

	* go-gcc.cc (Gcc_backend::Gcc_backend): Define
	__builtin_unreachable.
	(Gcc_backend::function): Add does_not_return parameter.

From-SVN: r255346

	gcc/
	* common.opt (use_gnu_debug_info_extensions): Delete DWARF_DEBUG from
	comment.
	* config/vx-common.h (DWARF_DEBUGGING_INFO): Delete undef.
	* doc/tm.texi.in (PREFERRED_DEBUGGING_TYPE): Delete DWARF_DEBUG
	reference.
	* doc/tm.texi: Regenerate.

From-SVN: r255345