[clang] [OpenMP] Introduce support for OMPX extensions and taskgraph frontend (PR #66919)

[Alexey Bataev via cfe-commits]

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@@ -234,6 +236,26 @@ class CGOpenMPTaskOutlinedRegionInfo final : public CGOpenMPRegionInfo {
   const UntiedTaskActionTy &Action;
 };
 
+/// API for captured statement code generation in OpenMP taskgraphs.
+class CGOpenMPTaskgraphRegionInfo final : public CGOpenMPRegionInfo {
+public:
+  CGOpenMPTaskgraphRegionInfo(const CapturedStmt &CS,
+                              const RegionCodeGenTy &CodeGen)
+      : CGOpenMPRegionInfo(CS, TaskgraphOutlinedRegion, CodeGen,
+                           llvm::omp::OMPD_taskgraph, false) {}
+
+  const VarDecl *getThreadIDVariable() const override { return 0; }
+
+  /// Get the name of the capture helper.
+  StringRef getHelperName() const override { return "taskgraph.omp_outlined."; }
+
+  static bool classof(const CGCapturedStmtInfo *Info) {
+    return CGOpenMPRegionInfo::classof(Info) &&
+           cast<CGOpenMPRegionInfo>(Info)->getRegionKind() ==
+               TaskgraphOutlinedRegion;
+  }
+};
+
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alexey-bataev wrote:

Split the patch. First, need to add parsing/sema for the directive, then for clauses in a separate patch, then codegen in a separate patch io reduce number of changes

https://github.com/llvm/llvm-project/pull/66919