re PR tree-optimization/88621 (wrong code at -O1 and above on x86_64-linux-gnu in 64-bit mode (not in 32-bit mode))

2019-01-02  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/88621
	* tree-ssa-loop-im.c (gather_mem_refs_stmt): Fix pastos, avoid
	bitfields when canoncalizing.

	* gcc.dg/torture/pr88621.c: New testcase.

From-SVN: r267510