re PR tree-optimization/80054 (ICE in verify_ssa with -O3 -march=broadwell/skylake...

re PR tree-optimization/80054 (ICE in verify_ssa with -O3 -march=broadwell/skylake-avx512)

[gcc]

2017-03-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/80054
	* gimple-ssa-strength-reduction.c (all_phi_incrs_profitable): Fail
	the optimization if a PHI or any of its arguments is not dominated
	by the candidate's basis.  Use gphi* rather than gimple* as
	appropriate.
	(replace_profitable_candidates): Clean up a gimple* variable that
	should be a gphi* variable.

[gcc/testsuite]

2017-03-20  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR tree-optimization/80054
	* g++.dg/torture/pr80054.C: New file.

From-SVN: r246290