Add obvious missing case to switch. PR10497.

llvm-svn: 136130

llvm/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp

@@ -524,12 +524,11 @@ void DAGTypeLegalizer::SplitVecRes_BITCAST(SDNode *N, SDValue &Lo,
 
   // Handle some special cases efficiently.
   switch (getTypeAction(InVT)) {
-  default:
-    assert(false && "Unknown type action!");
   case TargetLowering::TypeLegal:
   case TargetLowering::TypePromoteInteger:
   case TargetLowering::TypeSoftenFloat:
   case TargetLowering::TypeScalarizeVector:
+  case TargetLowering::TypeWidenVector:
     break;
   case TargetLowering::TypeExpandInteger:
   case TargetLowering::TypeExpandFloat:

llvm/test/CodeGen/X86/split-vector-bitcast.ll

@@ -0,0 +1,12 @@
+; RUN: llc < %s -march=x86 -mattr=-sse2,+sse | grep addps
+
+; PR10497
+; (This is primarily checking that this construct doesn't crash.)
+define void @a(<2 x float>* %a, <2 x i32>* %b) {
+  %cc = load <2 x float>* %a
+  %c = fadd <2 x float> %cc, %cc
+  %dd = bitcast <2 x float> %c to <2 x i32>
+  %d = add <2 x i32> %dd, %dd
+  store <2 x i32> %d, <2 x i32>* %b
+  ret void
+}