[clang] [OpenACC][CIR] Implement member exprs for 'copy' lowering (PR #142998)

[Andy Kaylor via cfe-commits]

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@@ -226,6 +228,10 @@ class OpenACCClauseCIREmitter final
     mlir::Location exprLoc = cgf.cgm.getLoc(curVarExpr->getBeginLoc());
     llvm::SmallVector<mlir::Value> bounds;
 
+    std::string exprString;
+    llvm::raw_string_ostream os(exprString);
+    e->printPretty(os, nullptr, cgf.getContext().getPrintingPolicy());
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andykaylor wrote:

Admittedly, I know very little about printing policy handling, but just using whatever the context gives us here makes me nervous. Does the format of the string matter? Is it just used for diagnostics?

https://github.com/llvm/llvm-project/pull/142998