[DAG] Don't perform SINT_TO_FP<->UINT_TO_FP custom conversion after legalization

The SINT_TO_FP<->UINT_TO_FP combines for non-negative integers should only occur for legal ops once LegalOperations = true

No test case to hand, noticed when investigating PR38226 + PR38970

llvm-svn: 343405

diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 09d5eb5..4ad84bc 100644 (file)
--- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -11723,8 +11723,8 @@ SDValue DAGCombiner::visitSINT_TO_FP(SDNode *N) {
 
   // If the input is a legal type, and SINT_TO_FP is not legal on this target,
   // but UINT_TO_FP is legal on this target, try to convert.
-  if (!TLI.isOperationLegalOrCustom(ISD::SINT_TO_FP, OpVT) &&
-      TLI.isOperationLegalOrCustom(ISD::UINT_TO_FP, OpVT)) {
+  if (!hasOperation(ISD::SINT_TO_FP, OpVT) &&
+      hasOperation(ISD::UINT_TO_FP, OpVT)) {
     // If the sign bit is known to be zero, we can change this to UINT_TO_FP.
     if (DAG.SignBitIsZero(N0))
       return DAG.getNode(ISD::UINT_TO_FP, SDLoc(N), VT, N0);
@@ -11780,8 +11780,8 @@ SDValue DAGCombiner::visitUINT_TO_FP(SDNode *N) {
 
   // If the input is a legal type, and UINT_TO_FP is not legal on this target,
   // but SINT_TO_FP is legal on this target, try to convert.
-  if (!TLI.isOperationLegalOrCustom(ISD::UINT_TO_FP, OpVT) &&
-      TLI.isOperationLegalOrCustom(ISD::SINT_TO_FP, OpVT)) {
+  if (!hasOperation(ISD::UINT_TO_FP, OpVT) &&
+      hasOperation(ISD::SINT_TO_FP, OpVT)) {
     // If the sign bit is known to be zero, we can change this to SINT_TO_FP.
     if (DAG.SignBitIsZero(N0))
       return DAG.getNode(ISD::SINT_TO_FP, SDLoc(N), VT, N0);