[clang] [llvm] [openmp] [OpenMP] Taskgraph Clang 'record and replay' frontend support (PR #159774)

[Alexey Bataev via llvm-commits]

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@@ -5954,6 +5976,48 @@ void CGOpenMPRuntime::emitTaskwaitCall(CodeGenFunction &CGF, SourceLocation Loc,
     Region->emitUntiedSwitch(CGF);
 }
 
+void CGOpenMPRuntime::emitTaskgraphCall(CodeGenFunction &CGF,
+                                        SourceLocation Loc,
+                                        const OMPExecutableDirective &D) {
+  if (!CGF.HaveInsertPoint())
+    return;
+
+  // Building kmp_taskgraph_flags_t flags for kmpc_taskgraph. C.f., kmp.h
+  enum {
+    NowaitFlag = 0x1, // Not used yet.
+    ReRecordFlag = 0x2,
+  };
+
+  unsigned Flags = 0;
+
+  CodeGenFunction OutlinedCGF(CGM, true);
+
+  const CapturedStmt *CS = cast<CapturedStmt>(D.getAssociatedStmt());
+
+  auto &&BodyGen = [CS](CodeGenFunction &CGF, PrePostActionTy &) {
+    CGF.EmitStmt(CS->getCapturedStmt());
+  };
+
+  LValue CapStruct = CGF.InitCapturedStruct(*CS);
+  CGOpenMPTaskgraphRegionInfo TaskgraphRegion(*CS, BodyGen);
+  CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(OutlinedCGF,
+                                                  &TaskgraphRegion);
+  llvm::Function *FnT = OutlinedCGF.GenerateCapturedStmtFunction(*CS);
+
+  std::vector<llvm::Value *> Args{
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alexey-bataev wrote:

Use SmallVector or std::array

https://github.com/llvm/llvm-project/pull/159774