[Bug rtl-optimization/63637] [4.9/5 Regression] CSE on x86 asm()-s no longer working due to PR/60663 fix

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63637

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Jan 23 19:55:16 2015
New Revision: 220059

URL: https://gcc.gnu.org/viewcvs?rev=220059&root=gcc&view=rev
Log:
    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:
    trunk/gcc/testsuite/gcc.dg/pr63637-1.c
    trunk/gcc/testsuite/gcc.dg/pr63637-2.c
    trunk/gcc/testsuite/gcc.dg/pr63637-3.c
    trunk/gcc/testsuite/gcc.dg/pr63637-4.c
    trunk/gcc/testsuite/gcc.dg/pr63637-5.c
    trunk/gcc/testsuite/gcc.dg/pr63637-6.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-1.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-2.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-3.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-4.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-5.c
    trunk/gcc/testsuite/gcc.target/i386/pr63637-6.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cse.c
    trunk/gcc/testsuite/ChangeLog