[Bug rtl-optimization/61094] [4.9 Regression] -O3 insn Internal compiler error in copyprop_hardreg_forward_1, at regcprop.c:775

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61094

--- Comment #17 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Jun 13 16:50:01 2014
New Revision: 211651

URL: https://gcc.gnu.org/viewcvs?rev=211651&root=gcc&view=rev
Log:
    PR rtl-optimization/61094
    * ree.c (combine_reaching_defs): Do not reextend an insn if it
    was marked as do_no_reextend.  If a copy is needed to eliminate
    an extension, then mark it as do_not_reextend.

    PR rtl-optimization/61094
    * g++.dg/pr61094: New test.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/g++.dg/pr61094.C
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/ree.c
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog