[OpenMP] Revert rL256842: [OpenMP] Offloading descriptor registration and device codegen.

It was causing two regression, so I'm reverting until the cause is found.

llvm-svn: 256858

1 files changed, 9 insertions, 30 deletions

diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
index 14917c20c53..82011984f8e 100644
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -2571,8 +2571,14 @@ void CodeGenFunction::EmitOMPTargetDirective(const OMPTargetDirective &S) {
   llvm::SmallVector<llvm::Value *, 16> CapturedVars;
   GenerateOpenMPCapturedVars(CS, CapturedVars);
 
-  llvm::Function *Fn = nullptr;
-  llvm::Constant *FnID = nullptr;
+  // Emit target region as a standalone region.
+  auto &&CodeGen = [&CS](CodeGenFunction &CGF) {
+    CGF.EmitStmt(CS.getCapturedStmt());
+  };
+
+  // Obtain the target region outlined function.
+  llvm::Value *Fn =
+      CGM.getOpenMPRuntime().emitTargetOutlinedFunction(S, CodeGen);
 
   // Check if we have any if clause associated with the directive.
   const Expr *IfCond = nullptr;
@@ -2587,34 +2593,7 @@ void CodeGenFunction::EmitOMPTargetDirective(const OMPTargetDirective &S) {
     Device = C->getDevice();
   }
 
-  // Check if we have an if clause whose conditional always evaluates to false
-  // or if we do not have any targets specified. If so the target region is not
-  // an offload entry point.
-  bool IsOffloadEntry = true;
-  if (IfCond) {
-    bool Val;
-    if (ConstantFoldsToSimpleInteger(IfCond, Val) && !Val)
-      IsOffloadEntry = false;
-  }
-  if (CGM.getLangOpts().OMPTargetTriples.empty())
-    IsOffloadEntry = false;
-
-  assert(CurFuncDecl && "No parent declaration for target region!");
-  StringRef ParentName;
-  // In case we have Ctors/Dtors we use the complete type variant to produce
-  // the mangling of the device outlined kernel.
-  if (auto *D = dyn_cast<CXXConstructorDecl>(CurFuncDecl))
-    ParentName = CGM.getMangledName(GlobalDecl(D, Ctor_Complete));
-  else if (auto *D = dyn_cast<CXXDestructorDecl>(CurFuncDecl))
-    ParentName = CGM.getMangledName(GlobalDecl(D, Dtor_Complete));
-  else
-    ParentName =
-        CGM.getMangledName(GlobalDecl(cast<FunctionDecl>(CurFuncDecl)));
-
-  CGM.getOpenMPRuntime().emitTargetOutlinedFunction(S, ParentName, Fn, FnID,
-                                                    IsOffloadEntry);
-
-  CGM.getOpenMPRuntime().emitTargetCall(*this, S, Fn, FnID, IfCond, Device,
+  CGM.getOpenMPRuntime().emitTargetCall(*this, S, Fn, IfCond, Device,
                                         CapturedVars);
 }