[llvm] [RISCV][GlobalISel] Legalize Scalable Vector Loads and Stores (PR #84965)

[Michael Maitland via llvm-commits]

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@@ -3330,16 +3330,17 @@ LegalizerHelper::LegalizeResult LegalizerHelper::lowerLoad(GAnyLoad &LoadMI) {
   LLT MemTy = MMO.getMemoryType();
   MachineFunction &MF = MIRBuilder.getMF();
 
-  unsigned MemSizeInBits = MemTy.getSizeInBits();
-  unsigned MemStoreSizeInBits = 8 * MemTy.getSizeInBytes();
+  unsigned MinMemSizeInBits = MemTy.getSizeInBits().getKnownMinValue();
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michaelmaitland wrote:

I think we can do this as `TypeSize MemSizeInBits` and `TypeSize MinMemStoreSizeInBits` as Craig Pointed out, which allows us to avoid calling getKnownMinValue. That way we avoid the case comparing fixed vector and scalable vector.

https://github.com/llvm/llvm-project/pull/84965