[clang] [CodeGen][CIR] Split out Backend Diags to utils, impl CIR error-attr (PR #225966)

[Andy Kaylor via cfe-commits]

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@@ -1404,6 +1404,13 @@ RValue CIRGenFunction::emitCall(const CIRGenFunctionInfo &funcInfo,
   if (callOp)
     *callOp = theCall;
 
+  // If we have the error-attr we need the source location info so that the
+  // backend diagnostics pick it up.
+  if (calleeDecl && calleeDecl->hasAttr<ErrorAttr>())
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andykaylor wrote:

Should this also be checking `getCodeGenOpts().ShowInliningChain`?

https://github.com/llvm/llvm-project/pull/225966