PR tree-optimization/63302
	* tree-ssa-reassoc.c (optimize_range_tests_xor,
	optimize_range_tests_diff): Use !integer_pow2p () instead of
	tree_log2 () < 0.

	* gcc.c-torture/execute/pr63302.c: New test.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_9-branch@216392 138bc75d-0d04-0410-961f-82ee72b054a4