The Linux kernel never passes floating point arguments around, vararg
functions or not. Hence no vector registers are ever used when calling a
vararg function.  But gcc still dutifully emits an "xor %eax,%eax" before
each and every call of a vararg function.  Since no callee use that for
anything, these instructions are redundant.

This patch adds the -mskip-rax-setup option to skip setting up RAX
register when SSE is disabled and there are no variable arguments passed
in vector registers.  Since RAX register is used to avoid unnecessarily
saving vector registers on stack when passing variable arguments, the
impacts of this option are callees may waste some stack space, misbehave
or jump to a random location.  GCC 4.4 or newer don't those issues,
regardless the RAX register value since they don't check the RAX register
value when SSE is disabled.

gcc/

	* config/i386/i386.c (ix86_expand_call): Skip setting up RAX
	register for -mskip-rax-setup when there are no parameters
	passed in vector registers.
	* config/i386/i386.opt (mskip-rax-setup): New option.
	* doc/invoke.texi: Document -mskip-rax-setup.

gcc/testsuite/

	* gcc.target/i386/amd64-abi-7.c: New tests.
	* gcc.target/i386/amd64-abi-8.c: Likwise.
	* gcc.target/i386/amd64-abi-9.c: Likwise.

From-SVN: r218870

gcc/:
	* config/aarch64/aarch64-simd.md (aarch64_lshr_simddi): Handle shift
	by 64 by moving const0_rtx.
	(aarch64_ushr_simddi): Delete.

	* config/aarch64/aarch64.md (enum unspec): Delete UNSPEC_USHR64.

gcc/testsuite/:

        * gcc.target/aarch64/ushr64_1.c: Remove scan-assembler "ushr...64".

From-SVN: r218868

        * config/aarch64/aarch64.md (enum "unspec"): Remove UNSPEC_SSHR64.

        * config/aarch64/aarch64-simd.md (aarch64_ashr_simddi): Change shift
        amount to 63 if was 64.
        (aarch64_sshr_simddi): Remove.

From-SVN: r218867

2014-12-18  Wilco Dijkstra  <wilco.dijkstra@arm.com>

	* gcc/config/aarch64/aarch64.c (TARGET_MIN_DIVISIONS_FOR_RECIP_MUL):
	Define.
	(aarch64_min_divisions_for_recip_mul): New function.

From-SVN: r218866

2014-12-18  Wilco Dijkstra  <wilco.dijkstra@arm.com>

	* config/aarch64/aarch64-protos.h (tune-params): Add code alignment
	tuning parameters.
	* gcc/config/aarch64/aarch64.c (generic_tunings): Add code alignment
	tuning parameters.
	(cortexa53_tunings): Likewise.
	(cortexa57_tunings): Likewise.
	(thunderx_tunings): Likewise.
	(aarch64_override_options): Use new alignment tunings.

From-SVN: r218865

re PR tree-optimization/64330 (IPA-ICF merges const exported vars that could be addressable in other TUs)

Fix for PR64330.

	PR tree-optimization/64330
	* ipa-icf.c (sem_variable::parse): Add checking
	for externally visible symbols and do not introduce
	an alias for an external declaration.

From-SVN: r218864

Fix for PR bootstrap/63573.

	PR bootstrap/63573
	* tree-inline.c (remap_gimple_stmt): Handle gimple_call_from_thunk_p
	predicate.

From-SVN: r218861

Fix for PR ipa/64146

	PR ipa/64146
	* ipa-icf.c (sem_function::merge): Check for
	decl_binds_to_current_def_p is newly added to merge operation.
	* g++.dg/ipa/pr64146.C: New test.

From-SVN: r218860

	* lib/mpx-dg.exp (check_effective_target_mpx): Change into link test.
	Add main.

From-SVN: r218859

	* testsuite/lib/boehm-gc.exp: Load target-utils.exp.

From-SVN: r218857

From-SVN: r218856

	PR tree-optimization/62178
	* tree-ssa-loop-ivopts.c (cheaper_cost_with_cand): New function.
	(iv_ca_replace): New function.
	(try_improve_iv_set): New parameter try_replace_p.
	Break local optimal fixed-point by calling iv_ca_replace.
	(find_optimal_iv_set_1): Pass new argument to try_improve_iv_set.

	gcc/testsuite/ChangeLog
	PR tree-optimization/62178
	* gcc.target/aarch64/pr62178.c: New test.

From-SVN: r218855

gcc/ChangeLog:
2014-12-17  Dehao Chen  <dehao@google.com>

        * auto-profile.c (afdo_annotate_cfg): Invoke update_ssa in the right
        place.
        (auto_profile): Recompute inline summary after processing cgraph node.

From-SVN: r218854

From-SVN: r218853

gcc/
	PR target/51244
	* config/sh/sh_treg_combine.cc (is_conditional_insn): New function.
	(cbranch_trace): Add member rtx* condition_rtx_in_insn, initialize it
	accordingly in constructor.
	(cbranch_trace::branch_condition_rtx_ref): New function.
	(cbranch_trace::branch_condition_rtx): Use branch_condition_rtx_ref.
	(sh_treg_combine::try_invert_branch_condition): Invert condition rtx
	in insn using reversed_comparison_code and validate_change instead of
	invert_jump_1.
	(sh_treg_combine::execute): Look for conditional insns in basic blocks
	in addition to conditional branches.
	* config/sh/sh.md (*movsicc_div0s): Remove combine patterns.

From-SVN: r218850

gcc/
	PR target/51244
	* config/sh/sh_treg_combine.cc (sh_treg_combine::try_optimize_cbranch):
	Combine ccreg inversion and cbranch into inverted cbranch.

From-SVN: r218847

2014-12-17  Sergio Durigan Junior  <sergiodj@redhat.com>

	* dg-extract-results.sh: Use --text with grep to avoid issues with
	  binary files.  Fall back to cat -v, if that doesn't work.

From-SVN: r218843

From-SVN: r218836

lra-constrints.c (process_alt_operands): Remove non allocatable hard regs when considering ira_prohibited_class_mode_regs.

2014-12-17  Vladimir Makarov  <vmakarov@redhat.com>

	* lra-constrints.c (process_alt_operands): Remove non allocatable
	hard regs when considering ira_prohibited_class_mode_regs.

From-SVN: r218835

2014-12-17  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/64173
	* trans-array.c (structure_alloc_comps): Do not nullify procedure
	pointer components.

2014-12-17  Janus Weil  <janus@gcc.gnu.org>

	PR fortran/64173
	* gfortran.dg/proc_ptr_comp_40.f90: New.

From-SVN: r218834

	* sreal.h (sreal::normalize): Implement inline.
	(sreal::normalize_up): New function.
	(sreal::normalize_down): New function.
	* sreal.c (sreal::normalize): Remove.

From-SVN: r218833

re PR c++/64333 (C++14 constexpr gives wrong results when a looping constexpr function is evaluated twice)

	PR c++/64333
	* constexpr.c (cxx_bind_parameters_in_call): non_constant_args parm.
	(cxx_eval_call_expression): Don't cache calls with non-constant args.
	(cxx_eval_constant_expression) [COMPOUND_EXPR]: Pass true for lval.
	(cxx_eval_unary_expression, cxx_eval_binary_expression)
	(cxx_eval_conditional_expression): Pass	false for lval.

From-SVN: r218832

From-SVN: r218831

From-SVN: r218830

gcc/

	* config/aarch64/aarch64.md (generic_sched): Delete it.

From-SVN: r218829

The build robot found this:

g++ -c   -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common  -DHAVE_CONFIG_H -I. -I. -I../../../gcc/gcc -I../../../gcc/gcc/. -I../../../gcc/gcc/../include -I../../../gcc/gcc/../libcpp/include -I/opt/cfarm/mpc/include  -I../../../gcc/gcc/../libdecnumber -I../../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber -I../../../gcc/gcc/../libbacktrace   -o msp430.o -MT msp430.o -MMD -MP -MF ./.deps/msp430.TPo ../../../gcc/gcc/config/msp430/msp430.c
../../../gcc/gcc/config/msp430/msp430.c:979:43: error: unused parameter ‘file’ [-Werror=unused-parameter]
 msp430_asm_output_addr_const_extra (FILE *file, rtx x)
                                           ^
cc1plus: all warnings being treated as errors
make[2]: *** [msp430.o] Error 1

(See for example this build:
http://toolchain.lug-owl.de/buildbot/show_build_details.php?id=384666)

Ok for this one?

2014-12-17  Jan-Benedict Glaw  <jbglaw@lug-owl.de>

        * config/msp430/msp430.c (msp430_asm_output_addr_const_extra): Fix
        unused argument warning.

From-SVN: r218828

gcc/
	* dwarf2out.h (struct array_descr_info): Remove the base_decl field.
	* dwarf2out.c (enum dw_scalar_form): New.
	(struct loc_descr_context): New.
	(add_scalar_info): New.
	(add_bound_info): Add a context parameter.  Use add_scalar_info.
	(loc_list_from_tree): Add a context parameter.  Handle PLACEHOLDER_EXPR
	nodes for type-related expressions.  Likewise for base declarations.
	(loc_descriptor_from_tree): Add a context parameter.
	(subrange_type_die): Update calls to add_bound_info.
	(tls_mem_loc_descriptor): Likewise.
	(loc_list_for_address_of_addr_expr_of_indirect_ref): Add a context
	parameter.  Update calls to loc_list_from_tree.
	(add_subscript_info): Update calls to add_bound_info.
	(gen_array_type_die): Update calls to loc_list_from_tree and to
	add_bound_info.
	(descr_info_loc): Remove.
	(add_descr_info_field): Remove.
	(gen_descr_array_type_die): Switch add_descr_info_field calls into
	add_scalar_info/add_bound_info ones.
	(gen_subprogram_die): Update calls to loc_list_from_tree.
	(gen_variable_die): Likewise.

From-SVN: r218827

	* dwarf2out.c (print_loc_descr): New.
	(print_dw_val): New.
	(print_attribute): New.
	(print_loc_descr): New.
	(print_die): Use print_dw_val.
	(debug_dwarf_loc_descr): New.
	* dwarf2out.h (debug_dwarf_loc_descr): New declaration.

From-SVN: r218826

	* gcc-interface/misc.c (gnat_get_array_descr_info): New.  Use it for
	the get_array_descr_info lang-hook.  Use it to tune the DWARF output
	for array types.

From-SVN: r218825

	* dwarf2out.c (gen_type_die_with_usage): Enable the array lang-hook
	even when (dwarf_version < 3 && dwarf_strict).
	(gen_descr_array_die): Do not output DW_AT_data_locationn,
	DW_AT_associated, DW_AT_allocated and DW_AT_byte_stride DWARF
	attributes when (dwarf_version < 3 && dwarf_strict).

From-SVN: r218824

gcc/
	* dwarf2out.h (enum array_descr_ordering): New.
	(array_descr_dimen): Add a bounds_type structure field.
	(struct array_descr_info): Add a field to hold index type information
	and another one to hold ordering information.
	* dwarf2out.c (gen_type_die_with_usage): Get the main variant before
	invoking the array descriptor language hook.  Initialize the
	array_descr_info structure before calling the lang-hook.
	(gen_descr_array_type_die): Use gen_type_die if not processing the main
	type variant.  Replace Fortran-specific code with generic one using
	this new field.  Add a GNAT descriptive type, if any.  Output type
	information for the array bound subrange, if any.

gcc/fortran
	* trans-types.c (gfc_get_array_descr_info): Describe all Fortran arrays
	with column major ordering.

From-SVN: r218823

From-SVN: r218822

From-SVN: r218820

From Uros Bizjak.
https://gcc.gnu.org/ml/gcc-patches/2014-12/msg01366.html

From-SVN: r218819

Add -malign-data={abi|compat,cachineline} to control how GCC aligns
variables.  "compat" uses increased alignment value compatible with
GCC 4.8 and earlier, "abi" uses alignment value as specified by the
psABI, and "cacheline" uses increased alignment value to match the
cache line size.  "compat" is the default.

gcc/

	PR target/61296
	* config/i386/i386-opts.h (ix86_align_data): New enum.
	* config/i386/i386.c (ix86_data_alignment): Return the ABI
	alignment value for -malign-data=abi, the cachine line size
	for -malign-data=cachineline and the older GCC compatible
	alignment value for for -malign-data=compat.
	* config/i386/i386.opt (malign-data=): New.
	* doc/invoke.texi: Document -malign-data=.

gcc/testsuite/

	PR target/61296
	* gcc.target/i386/pr61296-2.c: New.
	* gcc.target/i386/pr61296-2.c: Likewise.
	* gcc.target/i386/pr61296-3.c: Likewise.
	* gcc.target/i386/pr61296-4.c: Likewise.
	* gcc.target/i386/pr61296-5.c: Likewise.
	* gcc.target/i386/pr61296-6.c: Likewise.
	* gcc.target/i386/pr61296-7.c: Likewise.

Co-Authored-By: Jakub Jelinek <jakub@redhat.com>
Co-Authored-By: Uros Bizjak <ubizjak@gmail.com>

From-SVN: r218818

	PR testsuite/64328
	* gcc.dg/addr_equal-1.c: Not supported for -fPIC.

From-SVN: r218817

	PR middle-end/63568
	* match.pd: Add (x & ~m) | (y & m) -> ((x ^ y) & m) ^ x pattern.

	* gcc.dg/pr63568.c: New test.

From-SVN: r218816

	PR tree-optimization/64322
	* tree-vrp.c (extract_range_from_binary_expr_1): Attempt to derive
	range for RSHIFT_EXPR even if vr0 range is not VR_RANGE or is symbolic.

	* gcc.dg/tree-ssa/vrp95.c: New test.

From-SVN: r218812

	PR sanitizer/64289
	* c-convert.c: Include ubsan.h.
	(convert): For real -> integral casts and
	-fsanitize=float-cast-overflow don't call convert_to_integer, but
	instead instrument the float cast directly.

	* c-c++-common/ubsan/pr64289.c: New test.

From-SVN: r218811

	PR libstdc++/64302
	PR libstdc++/64303
	* include/bits/regex.h (match_results::cbegin, match_results::cend,
	regex_token_iterator::regex_token_iterator,
	regex_token_iterator::_M_normalize_result): Fix match_results cbegin
	and cend and regex_token_iterator::_M_result invariant.
	* include/bits/regex.tcc: Fix regex_token_iterator::_M_result invariant.
	* testsuite/28_regex/iterators/regex_token_iterator/64303.cc: Testcase.

From-SVN: r218810