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.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@218586 138bc75d-0d04-0410-961f-82ee72b054a4