[Bug rtl-optimization/37489] const_true_rtx returned for float compare

[rguenth at gcc dot gnu dot org]

------- Comment #11 from rguenth at gcc dot gnu dot org  2008-11-06 15:07 -------
Subject: Bug 37489

Author: rguenth
Date: Thu Nov  6 15:05:44 2008
New Revision: 141645

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=141645
Log:
2008-11-06  Richard Guenther  <rguenther@suse.de>

        Backport from mainline:
        2008-09-13  H.J. Lu  <hongjiu.lu@intel.com>

        PR rtl-optimization/37489
        * cse.c (fold_rtx): Don't return const_true_rtx for float
        compare if FLOAT_STORE_FLAG_VALUE is undefined.

        * g++.dg/opt/cse3.C: New testcase.
        * gcc.dg/torture/pr37969.c: New testcase.

Added:
    branches/gcc-4_3-branch/gcc/testsuite/g++.dg/opt/cse3.C
    branches/gcc-4_3-branch/gcc/testsuite/gcc.dg/torture/pr37969.c
Modified:
    branches/gcc-4_3-branch/gcc/ChangeLog
    branches/gcc-4_3-branch/gcc/cse.c
    branches/gcc-4_3-branch/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37489