re PR tree-optimization/72517 (436.cactusADM: More than 40% regression in O3 and Ofast on AMD bdver4 m/c.)

2016-07-26  Richard Biener  <rguenther@suse.de>

	PR middle-end/72517
	* expmed.c (extract_bit_field_1): Constrain the vector mode
	with element size matching the extraction mode size when
	choosing a better vector mode to do the extraction from.

From-SVN: r238756