[llvm] [LLVM][CodeGen][SVE] List MVTs that are desirable for extending loads. (PR #149153)

[David Sherwood via llvm-commits]

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@@ -7633,7 +7633,7 @@ SDValue DAGCombiner::visitAND(SDNode *N) {
 
     if (SDValue(GN0, 0).hasOneUse() &&
         isConstantSplatVectorMaskForType(N1.getNode(), ScalarVT) &&
-        TLI.isVectorLoadExtDesirable(SDValue(SDValue(GN0, 0)))) {
+        TLI.isVectorLoadExtDesirable(SDValue(SDValue(N, 0)))) {
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david-arm wrote:

I'm surprised that fixing this hasn't affected any existing tests! If I understand correctly, the argument passed to isVectorLoadExtDesirable should be the extended value - do you know why we need to wrap this in two SDValues?

https://github.com/llvm/llvm-project/pull/149153