[llvm] [IR] Add initial support for the byte type (PR #178666)

[Matt Arsenault via llvm-commits]

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@@ -3708,6 +3708,9 @@ const MCExpr *AsmPrinter::lowerConstant(const Constant *CV,
   if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV))
     return MCConstantExpr::create(CI->getZExtValue(), Ctx);
 
+  if (const ConstantByte *CB = dyn_cast<ConstantByte>(CV))
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arsenm wrote:

Missing codegen tests for these parts 

https://github.com/llvm/llvm-project/pull/178666