[Bug middle-end/43419] gcc replaces pow(x, 0.5) by sqrt(x), invalid when x is -0

[matz at gcc dot gnu dot org]

------- Comment #6 from matz at gcc dot gnu dot org  2010-03-18 16:08 -------
Subject: Bug 43419

Author: matz
Date: Thu Mar 18 16:07:53 2010
New Revision: 157543

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=157543
Log:
        PR middle-end/43419
        * builtins.c (expand_builtin_pow): Don't transform pow(x, 0.5)
        into sqrt(x) if we need to preserve signed zeros.

testsuite/
        * gcc.dg/pr43419.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr43419.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43419