[llvm] [AMDGPU] Account for inline asm size in inst_pref_size calculation (PR #192306)

[Matt Arsenault via llvm-commits]

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@@ -218,6 +222,31 @@ bool AMDGPUMCExpr::evaluateOccupancy(MCValue &Res,
   return true;
 }
 
+bool AMDGPUMCExpr::evaluateInstPrefSize(MCValue &Res,
+                                        const MCAssembler *Asm) const {
+  auto TryGetMCExprValue = [&](const MCExpr *Arg, uint64_t &ConstantValue) {
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arsenm wrote:

This identical lambda is defined in every function here, it should be moved to a real function. Maybe this should be evaluate this array of MCExpr and return array of the constants (maybe that already exists somewhere?)

https://github.com/llvm/llvm-project/pull/192306