[clang] [OpenACC][CIR] Implement beginning of 'copy' lowering for compute con… (PR #140304)

[Andy Kaylor via cfe-commits]

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@@ -36,6 +37,76 @@ template <typename ToTest> constexpr bool isCombinedType = false;
 template <typename T>
 constexpr bool isCombinedType<CombinedConstructClauseInfo<T>> = true;
 
+namespace {
+struct DataOperandInfo {
+  mlir::Location beginLoc;
+  mlir::Value varValue;
+  llvm::StringRef name;
+  mlir::ValueRange bounds;
+
+  DataOperandInfo(mlir::Location beginLoc, mlir::Value varValue,
+                  llvm::StringRef name, mlir::ValueRange bounds)
+      : beginLoc(beginLoc), varValue(varValue), name(name), bounds(bounds) {}
+};
+
+inline mlir::Value createIntExpr(CIRGen::CIRGenFunction &cgf,
+                                 CIRGen::CIRGenBuilderTy &builder,
+                                 const Expr *intExpr) {
+  mlir::Value expr = cgf.emitScalarExpr(intExpr);
+  mlir::Location exprLoc = cgf.cgm.getLoc(intExpr->getBeginLoc());
+
+  mlir::IntegerType targetType = mlir::IntegerType::get(
+      &cgf.getMLIRContext(), cgf.getContext().getIntWidth(intExpr->getType()),
+      intExpr->getType()->isSignedIntegerOrEnumerationType()
+          ? mlir::IntegerType::SignednessSemantics::Signed
+          : mlir::IntegerType::SignednessSemantics::Unsigned);
+
+  auto conversionOp = builder.create<mlir::UnrealizedConversionCastOp>(
+      exprLoc, targetType, expr);
+  return conversionOp.getResult(0);
+}
+
+// A helper function that gets the information from an operand to a data
+// clause, so that it can be used to emit the data operations.
+inline DataOperandInfo getDataOperandInfo(CIRGen::CIRGenFunction &cgf,
+                                          CIRGen::CIRGenBuilderTy &builder,
+                                          OpenACCDirectiveKind DK,
+                                          const Expr *E) {
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andykaylor wrote:

```suggestion
                                          const Expr *e) {
```

https://github.com/llvm/llvm-project/pull/140304