[WinEH] Update LCSSA to handle catchswitch with handlers inside and outside a loop
Differential Revision: http://reviews.llvm.org/D15630
llvm-svn: 256005
diff --git a/llvm/lib/Transforms/Utils/LCSSA.cpp b/llvm/lib/Transforms/Utils/LCSSA.cpp
index ef2f504..b4b2e14 100644
--- a/llvm/lib/Transforms/Utils/LCSSA.cpp
+++ b/llvm/lib/Transforms/Utils/LCSSA.cpp
@@ -66,6 +66,13 @@
PredIteratorCache &PredCache, LoopInfo *LI) {
SmallVector<Use *, 16> UsesToRewrite;
+ // Tokens cannot be used in PHI nodes, so we skip over them.
+ // We can run into tokens which are live out of a loop with catchswitch
+ // instructions in Windows EH if the catchswitch has one catchpad which
+ // is inside the loop and another which is not.
+ if (Inst.getType()->isTokenTy())
+ return false;
+
BasicBlock *InstBB = Inst.getParent();
for (Use &U : Inst.uses()) {