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
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 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
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/
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
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
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
* 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
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 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
libgcc/
* config/sh/crt.h: New.
* config/sh/crti.S: Use GLOBAL macro from crt.h for _init and _fini
symbols.
* config/sh/crt1.S: Likewise.
From-SVN: r218807
