[llvm] [RISCV][GISEL] Legalize G_VSCALE (PR #85967)

[Michael Maitland via llvm-commits]

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@@ -2980,6 +3010,25 @@ LegalizerHelper::widenScalar(MachineInstr &MI, unsigned TypeIdx, LLT WideTy) {
     Observer.changedInstr(MI);
     return Legalized;
   }
+  case TargetOpcode::G_VSCALE: {
+    MachineOperand &SrcMO = MI.getOperand(1);
+    LLVMContext &Ctx = MIRBuilder.getMF().getFunction().getContext();
+    unsigned ExtOpc = LI.getExtOpcodeForWideningConstant(
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michaelmaitland wrote:

Ok, I will revert and fix the issues in this PR.

https://github.com/llvm/llvm-project/pull/85967