[Bug tree-optimization/57066] [4.7/4.8/4.9 Regression] std::logb(-inf) returns wrong value

[mpolacek at gcc dot gnu.org]

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

--- Comment #6 from Marek Polacek <mpolacek at gcc dot gnu.org> 2013-04-25 15:52:16 UTC ---
Author: mpolacek
Date: Thu Apr 25 15:51:57 2013
New Revision: 198308

URL: http://gcc.gnu.org/viewcvs?rev=198308&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:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/torture/builtin-logb-1.c