[Bug rtl-optimization/30931] [4.1 regression] infinite loop with -O1 -fstrength-reduce

[ebotcazou at gcc dot gnu dot org]

------- Comment #13 from ebotcazou at gcc dot gnu dot org  2007-02-27 20:21 -------
Subject: Bug 30931

Author: ebotcazou
Date: Tue Feb 27 20:21:17 2007
New Revision: 122383

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=122383
Log:
        PR rtl-optimization/30931
        * loop.c (combine_givs_p): Return false if either GIV is not
        always executed.


Added:
    branches/gcc-4_1-branch/gcc/testsuite/gcc.c-torture/execute/20070227-1.c
Modified:
    branches/gcc-4_1-branch/gcc/ChangeLog
    branches/gcc-4_1-branch/gcc/loop.c
    branches/gcc-4_1-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30931