r265677 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rguenth@gcc.gnu.org]

Author: rguenth
Date: Wed Oct 31 11:57:33 2018
New Revision: 265677

URL: https://gcc.gnu.org/viewcvs?rev=265677&root=gcc&view=rev
Log:
2018-10-31  Richard Biener  <rguenther@suse.de>

	PR middle-end/70359
	PR middle-end/86270
	* tree-outof-ssa.c (insert_backedge_copies): Restrict
	copy generation to useful cases.  Place the copy before
	the definition of the backedge value when possible.

	* gcc.target/i386/pr70359.c: New testcase.
	* gcc.target/i386/pr86270.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.target/i386/pr70359.c
    trunk/gcc/testsuite/gcc.target/i386/pr86270.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-outof-ssa.c