Pass the correct SDNode to isNarrowingProfitable in DAGCombiner

justinfargnoli · justinfargnoli · commit 9ed8f93e0cf7 · 2025-05-05T23:22:09.000Z
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -15874,7 +15874,7 @@ SDValue DAGCombiner::visitTRUNCATE(SDNode *N) {
     break;
   }
 
-  if (TLI.isNarrowingProfitable(N, SrcVT, VT)) {
+  if (TLI.isNarrowingProfitable(N0.getNode(), SrcVT, VT)) {
     switch (N0.getOpcode()) {
     case ISD::ADD:
     case ISD::SUB:

Original file line number	Diff line number	Diff line change
`@@ -15874,7 +15874,7 @@ SDValue DAGCombiner::visitTRUNCATE(SDNode *N) {`
`15874`	`15874`	`break;`
`15875`	`15875`	`}`
`15876`	`15876`
`15877`		`- if (TLI.isNarrowingProfitable(N, SrcVT, VT)) {`
	`15877`	`+ if (TLI.isNarrowingProfitable(N0.getNode(), SrcVT, VT)) {`
`15878`	`15878`	`switch (N0.getOpcode()) {`
`15879`	`15879`	`case ISD::ADD:`
`15880`	`15880`	`case ISD::SUB:`