[Bug rtl-optimization/52139] [4.5/4.6/4.7 Regression] ICE: in remove_insn, at emit-rtl.c:3960 with -O -fPIC -fno-tree-dominator-opts -fno-tree-fre

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52139

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-08 
12:29:48 UTC ---
Author: jakub
Date: Wed Feb  8 12:29:43 2012
New Revision: 184005

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184005
Log:
    PR rtl-optimization/52139
    * cfgrtl.c (cfg_layout_merge_blocks): If BB_END
    is a BARRIER after emit_insn_after_noloc, move BB_END
    to the last non-BARRIER insn before it.

    * gcc.dg/pr52139.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr52139.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgrtl.c
    trunk/gcc/testsuite/ChangeLog