[OPENMP] Allow runtime insert its own code inside OpenMP regions.

Solution unifies interface of RegionCodeGenTy type to allow insert
runtime-specific code before/after main codegen action defined in
CGStmtOpenMP.cpp file. Runtime should not define its own RegionCodeGenTy
for general OpenMP directives, but must be allowed to insert its own
  (required) code to support target specific codegen.

llvm-svn: 264569

1 files changed, 17 insertions, 13 deletions

diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
index 3a634ac3087..3b2b30cdb73 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -305,28 +305,32 @@ void CGOpenMPRuntimeNVPTX::createOffloadEntry(llvm::Constant *ID,
 void CGOpenMPRuntimeNVPTX::emitTargetOutlinedFunction(
     const OMPExecutableDirective &D, StringRef ParentName,
     llvm::Function *&OutlinedFn, llvm::Constant *&OutlinedFnID,
-    bool IsOffloadEntry) {
+    bool IsOffloadEntry, const RegionCodeGenTy &CodeGen) {
   if (!IsOffloadEntry) // Nothing to do.
     return;
 
   assert(!ParentName.empty() && "Invalid target region parent name!");
 
-  const CapturedStmt &CS = *cast<CapturedStmt>(D.getAssociatedStmt());
-
   EntryFunctionState EST;
   WorkerFunctionState WST(CGM);
 
   // Emit target region as a standalone region.
-  auto &&CodeGen = [&EST, &WST, &CS, &D, this](CodeGenFunction &CGF) {
-    CodeGenFunction::OMPPrivateScope PrivateScope(CGF);
-    (void)CGF.EmitOMPFirstprivateClause(D, PrivateScope);
-    CGF.EmitOMPPrivateClause(D, PrivateScope);
-    (void)PrivateScope.Privatize();
-
-    emitEntryHeader(CGF, EST, WST);
-    CGF.EmitStmt(CS.getCapturedStmt());
-    emitEntryFooter(CGF, EST);
-  };
+  class NVPTXPrePostActionTy : public PrePostActionTy {
+    CGOpenMPRuntimeNVPTX &RT;
+    CGOpenMPRuntimeNVPTX::EntryFunctionState &EST;
+    CGOpenMPRuntimeNVPTX::WorkerFunctionState &WST;
+
+  public:
+    NVPTXPrePostActionTy(CGOpenMPRuntimeNVPTX &RT,
+                         CGOpenMPRuntimeNVPTX::EntryFunctionState &EST,
+                         CGOpenMPRuntimeNVPTX::WorkerFunctionState &WST)
+        : RT(RT), EST(EST), WST(WST) {}
+    void Enter(CodeGenFunction &CGF) override {
+      RT.emitEntryHeader(CGF, EST, WST);
+    }
+    void Exit(CodeGenFunction &CGF) override { RT.emitEntryFooter(CGF, EST); }
+  } Action(*this, EST, WST);
+  CodeGen.setAction(Action);
   emitTargetOutlinedFunctionHelper(D, ParentName, OutlinedFn, OutlinedFnID,
                                    IsOffloadEntry, CodeGen);