[Bug tree-optimization/60183] [4.7/4.8/4.9 Regression] phiprop creates invalid code

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=60183

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ok, we do need the post-dominators to avoid

FAIL: g++.dg/tree-ssa/pr21463.C -std=gnu++98  scan-tree-dump-times phiopt1
"MIN_
EXPR" 2
FAIL: g++.dg/tree-ssa/pr21463.C -std=gnu++98  scan-tree-dump-times phiopt1
"MAX_
EXPR" 2
FAIL: g++.dg/tree-ssa/pr21463.C -std=gnu++11  scan-tree-dump-times phiopt1
"MIN_
EXPR" 2
FAIL: g++.dg/tree-ssa/pr21463.C -std=gnu++11  scan-tree-dump-times phiopt1
"MAX_
EXPR" 2
FAIL: g++.dg/tree-ssa/pr57380.C -std=gnu++98  scan-tree-dump phiopt1 "MAX_EXPR"
FAIL: g++.dg/tree-ssa/pr57380.C -std=gnu++11  scan-tree-dump phiopt1 "MAX_EXPR"

Re-testing that variant.