[llvm] [RISC-V][GISEL] Select G_BITCAST for scalable vectors (PR #101486)

[Jiahan Xie via llvm-commits]

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@@ -785,6 +786,26 @@ void RISCVInstructionSelector::preISelLower(MachineInstr &MI,
     replacePtrWithInt(MI.getOperand(1), MIB, MRI);
     MI.setDesc(TII.get(TargetOpcode::G_AND));
     MRI.setType(DstReg, sXLen);
+    break;
+  }
+  case TargetOpcode::G_LOAD: {
+    Register DstReg = MI.getOperand(0).getReg();
+    const LLT DstTy = MRI.getType(DstReg);
+    if (!(DstTy.isVector() && DstTy.getElementType().isPointer()))
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jiahanxie353 wrote:

would `!DstTy.isPointerVector()` suffice since that also checks if `DestTy` is a `Vector` or not?

https://github.com/llvm/llvm-project/pull/101486