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cmd/compile: fix dominator check in check()

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Ancestor comparison was the wrong way around, effectively
disabling the def-must-dominate-use check.

Update #15084

Change-Id: Ic56d674c5000569d2cc855bbb000a60eae517c7c
Reviewed-on: https://go-review.googlesource.com/22330
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
This commit is contained in:
Keith Randall 2016-04-20 17:29:50 -07:00
parent 9568d54fb8
commit 4938d7b5fc
1 changed files with 1 additions and 1 deletions
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2
src/cmd/compile/internal/ssa/check.go
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@ -338,7 +338,7 @@ func checkFunc(f *Func) {
// domCheck reports whether x dominates y (including x==y).
func domCheck(f *Func, sdom sparseTree, x, y *Block) bool {
if !sdom.isAncestorEq(y, f.Entry) {
if !sdom.isAncestorEq(f.Entry, y) {
// unreachable - ignore
return true
}