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

[Michael Maitland via llvm-commits]

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@@ -3690,7 +3690,7 @@ LegalizerHelper::LegalizeResult LegalizerHelper::lowerLoad(GAnyLoad &LoadMI) {
 
   if (!isPowerOf2_32(MemSizeInBits)) {
     // This load needs splitting into power of 2 sized loads.
-    LargeSplitSize = llvm::bit_floor(MemSizeInBits);
+    LargeSplitSize = llvm::bit_floor(MemSizeInBits.getKnownMinValue());
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michaelmaitland wrote:

I think so. Otherwise we risk loosing out on the fact that the size is actually scalable.

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