[llvm] [GISel] Legalize bitreverse with types smaller than 8 bits (PR #92998)

[Matt Arsenault via llvm-commits]

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@@ -7975,6 +7975,8 @@ LegalizerHelper::LegalizeResult
 LegalizerHelper::lowerBitreverse(MachineInstr &MI) {
   auto [Dst, Src] = MI.getFirst2Regs();
   const LLT Ty = MRI.getType(Src);
+  // FIXME: It should be getScalarSizeInBits. Please fix this when vector
+  // support is complete.
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arsenm wrote:

should just change it now 

https://github.com/llvm/llvm-project/pull/92998