[Bug rtl-optimization/41917] Strange athrithmetic result with -O3

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2009-11-03 22:36 -------
Subject: Bug 41917

Author: jakub
Date: Tue Nov  3 22:36:39 2009
New Revision: 153874

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=153874
Log:
        PR rtl-optimization/41917
        * rtlanal.c (num_sign_bit_copies1) <case UMOD>: If sign bit of second
        operand isn't known to be 0, return 1.

        * gcc.c-torture/execute/pr41917.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr41917.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/rtlanal.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41917