[Bug middle-end/64225] [4.8/4.9 Regression] -funsafe-math-optimizations generates call to pow where multiply instruction would do

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64225

--- Comment #15 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Author: wschmidt
Date: Wed Dec 10 16:52:29 2014
New Revision: 218586

URL: https://gcc.gnu.org/viewcvs?rev=218586&root=gcc&view=rev
Log:
2014-12-10  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    Backport from mainline:
    2014-12-09  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

    PR middle-end/64225
    * tree-ssa-reassoc.c (acceptable_pow_call): Disable transformation
    for BUILT_IN_POW when flag_errno_math is present.


Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-ssa-reassoc.c