r239778 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Fri Aug 26 12:33:43 2016
New Revision: 239778

URL: https://gcc.gnu.org/viewcvs?rev=239778&root=gcc&view=rev
Log:
2016-08-26  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/69047
	* tree-ssa.c (maybe_rewrite_mem_ref_base): Handle general bitfield
	extracts similar to what FRE does.
	(non_rewritable_mem_ref_base): Likewise.

	* gcc.dg/pr69047.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr69047.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa.c