[SDAGBuilder] Make the AArch64 builder happier.

I intended this loop to only unwrap SplitVector actions, but it
was more broad than that, such as unwrapping WidenVector actions,
which makes operations seem legal when they're not.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237457 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 1915a43a0022d7dec18320662b0a587ec79f8778..3c5d32f1749c7717c35c958a0be8357217d54da0 100644 (file)
--- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -2278,11 +2278,11 @@ void SelectionDAGBuilder::visitSelect(const User &I) {
 
     EVT VT = ValueVTs[0];
     LLVMContext &Ctx = *DAG.getContext();
-    while (DAG.getTargetLoweringInfo().getTypeToTransformTo(Ctx, VT) != VT)
-      VT = DAG.getTargetLoweringInfo().getTypeToTransformTo(Ctx, VT);
+    auto &TLI = DAG.getTargetLoweringInfo();
+    while (TLI.getTypeAction(Ctx, VT) == TargetLoweringBase::TypeSplitVector)
+      VT = TLI.getTypeToTransformTo(Ctx, VT);
 
-    if (Opc != ISD::DELETED_NODE &&
-        DAG.getTargetLoweringInfo().isOperationLegalOrCustom(Opc, VT)) {
+    if (Opc != ISD::DELETED_NODE && TLI.isOperationLegalOrCustom(Opc, VT)) {
       OpCode = Opc;
       LHSVal = getValue(LHS);
       RHSVal = getValue(RHS);