trivial fix for PR20314
Make sure that the AddrInst is an Instruction.
llvm-svn: 213197
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index ccac40c..f2c7e64 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -2130,8 +2130,11 @@
return true;
}
case Instruction::SExt: {
+ // Make sure this isn't a ConstantExpr (PR20314).
+ Instruction *SExt = dyn_cast<Instruction>(AddrInst);
+ if (!SExt) return false;
+
// Try to move this sext out of the way of the addressing mode.
- Instruction *SExt = cast<Instruction>(AddrInst);
// Ask for a method for doing so.
TypePromotionHelper::Action TPH = TypePromotionHelper::getAction(
SExt, InsertedTruncs, TLI, PromotedInsts);