Don't try to calculate the alignment of an unsigned type. Fixes PR14371!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168280 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 1 deletions

diff --git a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
index 4ab5b6e4a0..4d106fc188 100644
--- a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
+++ b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
@@ -164,7 +164,8 @@ static unsigned getPointeeAlignment(Value *V, const DataLayout &TD) {
       return TD.getPreferredAlignment(GV);
 
   if (PointerType *PT = dyn_cast<PointerType>(V->getType()))
-    return TD.getABITypeAlignment(PT->getElementType());
+    if (PT->getElementType()->isSized())
+      return TD.getABITypeAlignment(PT->getElementType());
 
   return 0;
 }