[clang] [mlir] [OpenACC] Implement tile/collapse lowering (PR #138576)

[Andy Kaylor via cfe-commits]

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@@ -82,6 +83,17 @@ class OpenACCClauseCIREmitter final
     return conversionOp.getResult(0);
   }
 
+  mlir::Value createConstantInt(mlir::Location loc, unsigned width,
+                                int64_t value) {
+    mlir::IntegerType ty = mlir::IntegerType::get(
+        &cgf.getMLIRContext(), width,
+        mlir::IntegerType::SignednessSemantics::Signless);
+    auto constOp = builder.create<mlir::arith::ConstantOp>(
+        loc, ty, builder.getIntegerAttr(ty, value));
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andykaylor wrote:

I haven't seen anything that combines constants. Maybe there was a preference for having the constant values near the point of use for readability?

https://github.com/llvm/llvm-project/pull/138576