[llvm] [RISCV] Add getSameRatioLMUL (PR #69570)

[Craig Topper via llvm-commits]

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@@ -206,6 +206,15 @@ unsigned RISCVVType::getSEWLMULRatio(unsigned SEW, RISCVII::VLMUL VLMul) {
   return (SEW * 8) / LMul;
 }
 
+RISCVII::VLMUL RISCVVType::getSameRatioLMUL(unsigned SEW, RISCVII::VLMUL VLMUL,
+                                            unsigned EEW) {
+  int Ratio = RISCVVType::getSEWLMULRatio(SEW, VLMUL);
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topperc wrote:

Why `int`?

https://github.com/llvm/llvm-project/pull/69570