backport: re PR tree-optimization/81354 (Segmentation fault in SSA Strength Reduction...

backport: re PR tree-optimization/81354 (Segmentation fault in SSA Strength Reduction using -O3)

[gcc]

2017-08-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline
	2017-08-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/81354
	* gimple-ssa-strength-reduction.c (create_add_on_incoming_edge):
	Insert on edges rather than explicitly creating landing pads.
	(analyze_candidates_and_replace): Commit edge inserts.

[gcc/testsuite]

2017-08-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline
	2017-08-08  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/81354
	* g++.dg/torture/pr81354.C: New file.

From-SVN: r251122