[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 #3 from xuepeng guo <xguo at gcc dot gnu.org> 2012-10-23 03:49:21 UTC ---
Author: xguo
Date: Tue Oct 23 03:49:17 2012
New Revision: 192703

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192703
Log:
    gcc/
    PR target/55019
    * config/arm/arm.c (thumb1_expand_prologue): Don't push high regs with
    live argument regs.

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

Added:
    trunk/gcc/testsuite/gcc.dg/pr55019.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/arm/arm.c
    trunk/gcc/testsuite/ChangeLog