clean up orphan landingpads

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Transforms/NaCl/LowerEmExceptionsPass.cpp b/lib/Transforms/NaCl/LowerEmExceptionsPass.cpp
index 480506dcf0..2c0b294280 100644
--- a/lib/Transforms/NaCl/LowerEmExceptionsPass.cpp
+++ b/lib/Transforms/NaCl/LowerEmExceptionsPass.cpp
@@ -168,6 +168,14 @@ bool LowerEmExceptions::runOnModule(Module &M) {
       }
     }
 
+    // Look for orphan landingpads, can occur in blocks with no predecesors
+    for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
+      Instruction *I = BB->getFirstNonPHI();
+      if (LandingPadInst *LP = dyn_cast<LandingPadInst>(I)) {
+        LandingPads.insert(LP);
+      }
+    }
+
     // Handle all the landingpad for this function together, as multiple invokes may share a single lp
     for (std::set<LandingPadInst*>::iterator I = LandingPads.begin(); I != LandingPads.end(); I++) {
       // Replace the landingpad with a landingpad call to get the low part, and a getHigh for the high