gcc/

gcc/
	* simplify-rtx.c (simplify_unary_operation_1): Extend the handling
	of SUBREG_PROMOTED_VAR_P to cope with cases where the extended value
	is smaller than the original promoted value.
	(simplify_subreg): If OP is a SUBREG, try to preserve its
	SUBREG_PROMOTED_VAR_P information.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@132755 138bc75d-0d04-0410-961f-82ee72b054a4