[llvm] [RISCV] Teach RISCVMakeCompressible handle byte/half load/store for Zbc. (PR #83375)

[Yeting Kuo via llvm-commits]

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@@ -99,6 +99,14 @@ static unsigned log2LdstWidth(unsigned Opcode) {
   switch (Opcode) {
   default:
     llvm_unreachable("Unexpected opcode");
+  case RISCV::LB:
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yetingk wrote:

Removed.

https://github.com/llvm/llvm-project/pull/83375