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

[Michael Maitland via llvm-commits]

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@@ -3330,8 +3330,12 @@ LegalizerHelper::LegalizeResult LegalizerHelper::lowerLoad(GAnyLoad &LoadMI) {
   LLT MemTy = MMO.getMemoryType();
   MachineFunction &MF = MIRBuilder.getMF();
 
-  unsigned MemSizeInBits = MemTy.getSizeInBits();
-  unsigned MemStoreSizeInBits = 8 * MemTy.getSizeInBytes();
+  unsigned MemSizeInBits = MemTy.isScalable()
+                               ? MemTy.getSizeInBits().getKnownMinValue()
+                               : MemTy.getSizeInBits();
+  unsigned MemStoreSizeInBits =
+      MemTy.isScalable() ? 8 * MemTy.getSizeInBytes().getKnownMinValue()
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michaelmaitland wrote:

Same as above. I think you can use getKnownMinValue() in any case.

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