[Bug target/59929] [4.8/4.9 regression] -mno-accumulate-outgoing-args doesn't work with x32

[hjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59929

--- Comment #4 from hjl at gcc dot gnu.org <hjl at gcc dot gnu.org> ---
Author: hjl
Date: Fri Jan 24 03:38:10 2014
New Revision: 207023

URL: http://gcc.gnu.org/viewcvs?rev=207023&root=gcc&view=rev
Log:
Get stack adjustment from push operand in pushsf splitter

pushsf for -m64/-mx32 looks like

(set (mem:SF (pre_modify:SI (reg/f:SI 7 sp)
                (plus:SI (reg/f:SI 7 sp)
                (const_int -8))))
     (reg:SF 22 xmm1 [orig:84 D.1790 ] [84]))

Stack adjustment is in push operand and it isn't stack register mode size
which may be 4 bytes for -mx32.  This patch gets stack adjustment from
push operand if code of push isn't PRE_DEC.

gcc/

    PR target/59929
    * config/i386/i386.md (pushsf splitter): Get stack adjustment
    from push operand if code of push isn't PRE_DEC.

gcc/testsuite/

    PR target/59929
    * gcc.target/i386/pr59929.c: New test.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr59929.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/i386/i386.md
    trunk/gcc/testsuite/ChangeLog