[Bug rtl-optimization/53942] [4.6/4.7/4.8 Regression] unable to find a register to spill in class 'CREG'

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53942

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-13 07:35:11 UTC ---
Author: jakub
Date: Mon Aug 13 07:35:03 2012
New Revision: 190338

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=190338
Log:
    Backported from trunk
    2012-07-19  Jakub Jelinek  <jakub@redhat.com>

    PR rtl-optimization/53942
    * function.c (assign_parm_setup_reg): Avoid zero/sign extension
    directly from likely spilled non-fixed hard registers, move them
    to pseudo first.

    * gcc.dg/pr53942.c: New test.

Added:
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/pr53942.c
Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/function.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog