[Bug target/55019] Incorrectly use live argument register to save high register in thumb1 prologue

[xguo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55019

--- Comment #8 from xuepeng guo <xguo at gcc dot gnu.org> 2012-10-26 02:12:17 UTC ---
Author: xguo
Date: Fri Oct 26 02:12:06 2012
New Revision: 192831

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192831
Log:
    gcc/ChangeLog
    Backport from mainline
    2012-10-23  Terry Guo  <terry.guo@arm.com>

    PR target/55019
    * config/arm/arm.c (thumb1_expand_prologue): Don't push high regs with
    live argument regs.

    gcc/testsuite/ChangeLog
    Backport from mainline
    2012-10-23  Terry Guo  <terry.guo@arm.com>

    PR target/55019
    * gcc.dg/pr55019.c: New.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/pr55019.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/config/arm/arm.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog