[Bug tree-optimization/57066] [4.7/4.8 Regression] std::logb(-inf) returns wrong value

[mpolacek at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57066

--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-05-03 08:59:30 UTC ---
Author: mpolacek
Date: Fri May  3 08:59:14 2013
New Revision: 198571

URL: http://gcc.gnu.org/viewcvs?rev=198571&root=gcc&view=rev
Log:
    PR tree-optimization/57066
        * builtins.c (fold_builtin_logb): Return +Inf for -Inf.

        * gcc.dg/torture/builtin-logb-1.c: Adjust testcase.


Modified:
    branches/gcc-4_7-branch/gcc/ChangeLog
    branches/gcc-4_7-branch/gcc/builtins.c
    branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_7-branch/gcc/testsuite/gcc.dg/torture/builtin-logb-1.c