expmed.c (expand_shift_1): Canonicalize rotates by constant bitsize / 2 to bitsize...

expmed.c (expand_shift_1): Canonicalize rotates by constant bitsize / 2 to bitsize - 1.

	* expmed.c (expand_shift_1): Canonicalize rotates by
	constant bitsize / 2 to bitsize - 1.
	* simplify-rt.x (simplify_binary_operation_1) <case ROTATE,
	case ROTATERT>: Likewise.

	Revert:
	2013-05-10  Jakub Jelinek  <jakub@redhat.com>

	* config/i386/i386.md (rotateinv): New code attr.
	(*<rotate_insn><mode>3_1, *<rotate_insn>si3_1_zext,
	*<rotate_insn>qi3_1_slp): Emit rorl %eax instead of
	roll $31, %eax, etc.

From-SVN: r198864