Don't call dominates on unreachable instructions.
llvm-svn: 151466
diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp
index 37253f7..b518d0c 100644
--- a/llvm/lib/Analysis/InstructionSimplify.cpp
+++ b/llvm/lib/Analysis/InstructionSimplify.cpp
@@ -92,7 +92,8 @@
// If we have a DominatorTree then do a precise test.
if (DT)
- return DT->dominates(I, P);
+ return !DT->isReachableFromEntry(P->getParent()) ||
+ !DT->isReachableFromEntry(I->getParent()) || DT->dominates(I, P);
// Otherwise, if the instruction is in the entry block, and is not an invoke,
// then it obviously dominates all phi nodes.