[Bug target/19116] -funsafe-math-optimizations make nan compares equal to one another (-finite-math-only should be doing that)

[rguenth at gcc dot gnu dot org]

------- Comment #18 from rguenth at gcc dot gnu dot org  2006-11-06 09:33 
-------
Subject: Bug 19116

Author: rguenth
Date: Mon Nov  6 09:33:16 2006
New Revision: 118517

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=118517
Log:
2006-11-06  Richard Guenther  <[EMAIL PROTECTED]>

        Backport from mainline:
        2006-10-21  Richard Guenther  <[EMAIL PROTECTED]>

        PR target/19116
        * config/i386/i386.c (override_options): Do not set MASK_IEEE_FP
        if flag_unsafe_math_optimizations is specified.  We have
        flag_finite_math_only for that.
        * config/i386/i386.md (sqrtxf2): Do not require TARGET_IEEE_FP
        or flag_unsafe_math_optimizations.

        PR middle-end/28796
        * simplify-rtx.c (simplify_const_relational_operation):
        Do not constant-fold ORDERED and UNORDERED for
        flag_unsafe_math_optimizations but only we do not need to
        honor NaNs for the given mode.

Modified:
    branches/gcc-4_2-branch/gcc/ChangeLog
    branches/gcc-4_2-branch/gcc/config/i386/i386.c
    branches/gcc-4_2-branch/gcc/config/i386/i386.md
    branches/gcc-4_2-branch/gcc/simplify-rtx.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19116