re PR rtl-optimization/65321 (ICE on valid code at -O2 and -O3 with -g enabled in decompose, at rtl.h:2007)

	PR rtl-optimization/65321
	* cfgexpand.c (expand_debug_expr): Ensure shift amount isn't wider
	than shift mode.
	* var-tracking.c (use_narrower_mode): Likewise.

	* gcc.dg/pr65321.c: New test.

From-SVN: r221298