Add a check to make sure schedulePass() has not deleted stale RequiredPass.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139642 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/VMCore/PassManager.cpp b/lib/VMCore/PassManager.cpp
index 34f3768..ecedb1d 100644
--- a/lib/VMCore/PassManager.cpp
+++ b/lib/VMCore/PassManager.cpp
@@ -1634,9 +1634,11 @@
FPP->add(RequiredPass);
// Register P as the last user of RequiredPass.
- SmallVector<Pass *, 1> LU;
- LU.push_back(RequiredPass);
- FPP->setLastUser(LU, P);
+ if (RequiredPass) {
+ SmallVector<Pass *, 1> LU;
+ LU.push_back(RequiredPass);
+ FPP->setLastUser(LU, P);
+ }
}
/// Return function pass corresponding to PassInfo PI, that is
