[clang] [CIR][OpenMP] Emit #pragma omp for as omp.wsloop + omp.loop_nest (PR #181841)

[Konstantinos Parasyris via cfe-commits]

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@@ -63,6 +63,43 @@ class CIRGenFunction : public CIRGenTypeCache {
   /// is where the next operations will be introduced.
   CIRGenBuilderTy &builder;
 
+  /// State used to communicate OpenMP loop bounds from `emitOMPForDirective`
+  /// to `emitForStmt`.
+  struct LoopBounds {
+    mlir::Value lowerBound;
+    mlir::Value upperBound;
+    mlir::Value step;
+    mlir::Type inductionVarType;
+    const VarDecl *inductionVar;
+    bool inclusive;
+  };
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koparasy wrote:

IIRC OG calls this `OMPLoopArguments`, shouldn't we pick that naming convention and follow their pattern? It will be easier for people who are already aware of OG codegen to help out in CIR.

https://github.com/llvm/llvm-project/pull/181841