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Subject: [Bug rtl-optimization/63637] [4.9 Regression] CSE on x86 asm()-s no longer working due to PR/60663 fix
Date: Sun, 01 Feb 2015 17:33:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63637

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Feb  1 17:33:19 2015
New Revision: 220323

URL: https://gcc.gnu.org/viewcvs?rev=220323&root=gcc&view=rev
Log:
    Backported from mainline
    2015-01-23  Jakub Jelinek  <jakub@redhat.com>

    PR rtl-optimization/63637
    PR rtl-optimization/60663
    * cse.c (merge_equiv_classes): Set new_elt->cost to MAX_COST
    if elt->cost is MAX_COST for ASM_OPERANDS.
    (find_sets_in_insn): Fix up comment typo.
    (cse_insn): Don't set src_volatile for all non-volatile
    ASM_OPERANDS in PARALLELs, but just those with multiple outputs
    or with "memory" clobber.  Set elt->cost to MAX_COST
    for ASM_OPERANDS in PARALLEL.  Set src_elt->cost to MAX_COST
    if new_src is ASM_OPERANDS and elt->cost is MAX_COST.

    * gcc.dg/pr63637-1.c: New test.
    * gcc.dg/pr63637-2.c: New test.
    * gcc.dg/pr63637-3.c: New test.
    * gcc.dg/pr63637-4.c: New test.
    * gcc.dg/pr63637-5.c: New test.
    * gcc.dg/pr63637-6.c: New test.
    * gcc.target/i386/pr63637-1.c: New test.
    * gcc.target/i386/pr63637-2.c: New test.
    * gcc.target/i386/pr63637-3.c: New test.
    * gcc.target/i386/pr63637-4.c: New test.
    * gcc.target/i386/pr63637-5.c: New test.
    * gcc.target/i386/pr63637-6.c: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-1.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-2.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-3.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-4.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-5.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/pr63637-6.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-1.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-2.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-3.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-4.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-5.c
    branches/gcc-4_9-branch/gcc/testsuite/gcc.target/i386/pr63637-6.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/cse.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog