[llvm] MCExpr-ify SIProgramInfo (PR #88257)

[Janek van Oirschot via llvm-commits]

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@@ -462,6 +463,12 @@ MetadataStreamerMsgPackV4::getHSAKernelProps(const MachineFunction &MF,
   const SIMachineFunctionInfo &MFI = *MF.getInfo<SIMachineFunctionInfo>();
   const Function &F = MF.getFunction();
 
+  auto getMCExprValue = [](const MCExpr *Value) {
+    int64_t Val;
+    Value->evaluateAsAbsolute(Val);
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JanekvO wrote:

Now errors if it cannot resolve; aim to remove this helper when consumers of `SIProgramInfo` allow MCExprs directly.

https://github.com/llvm/llvm-project/pull/88257