Don't call dominates on unreachable instructions. Should fix the dragonegg
build. Testcase is still reducing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151474 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/MemoryDependenceAnalysis.cpp b/lib/Analysis/MemoryDependenceAnalysis.cpp
index cfaf2da..3a544f3 100644
--- a/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -350,14 +350,18 @@
bool shouldExplore(Use *U) {
Instruction *I = cast<Instruction>(U->getUser());
- if (BeforeHere != I && DT->dominates(BeforeHere, I))
+ BasicBlock *BB = I->getParent();
+ if (BeforeHere != I &&
+ (!DT->isReachableFromEntry(BB) || DT->dominates(BeforeHere, I)))
return false;
return true;
}
bool captured(Use *U) {
Instruction *I = cast<Instruction>(U->getUser());
- if (BeforeHere != I && DT->dominates(BeforeHere, I))
+ BasicBlock *BB = I->getParent();
+ if (BeforeHere != I &&
+ (!DT->isReachableFromEntry(BB) || DT->dominates(BeforeHere, I)))
return false;
Captured = true;
return true;