[llvm] [RISCV] Handle zeroinitializer of vector tuple Type (PR #113995)

[Luke Lau via llvm-commits]

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@@ -66,6 +66,25 @@ void RISCVDAGToDAGISel::PreprocessISelDAG() {
           VT.isInteger() ? RISCVISD::VMV_V_X_VL : RISCVISD::VFMV_V_F_VL;
       SDLoc DL(N);
       SDValue VL = CurDAG->getRegister(RISCV::X0, Subtarget->getXLenVT());
+
+      if (VT.isRISCVVectorTuple()) {
+        unsigned NF = VT.getRISCVVectorTupleNumFields();
+        unsigned NumScalElts = VT.getSizeInBits() / (NF * 8);
+        SDValue EltVal = CurDAG->getConstant(0, DL, Subtarget->getXLenVT());
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lukel97 wrote:

Should we use N->getOperand(0) instead and assert that it's zero, just to be safe?

https://github.com/llvm/llvm-project/pull/113995