[Bug rtl-optimization/38774] [4.4 Regression] ice in df_refs_verify, at df-scan.c:4307

[jakub at gcc dot gnu dot org]

------- Comment #8 from jakub at gcc dot gnu dot org  2009-01-13 22:36 -------
Subject: Bug 38774

Author: jakub
Date: Tue Jan 13 22:36:06 2009
New Revision: 143355

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143355
Log:
        PR rtl-optimization/38774
        * combine.c (simplify_set): When undoing cc_use change, don't do
        PUT_CODE on the newly created comparison, but instead put back the
        old comparison.

        * gcc.dg/torture/pr38774.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr38774.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/combine.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38774