[Clang][OpenMP Offload] Move offload registration code to the wrapper

The final list of OpenMP offload targets becomes known only at the link time and since offload registration code depends on the targets list it makes sense to delay offload registration code generation to the link time instead of adding it to the host part of every fat object. This patch moves offload registration code generation from clang to the offload wrapper tool.

This is the last part of the OpenMP linker script elimination patch https://reviews.llvm.org/D64943

Differential Revision: https://reviews.llvm.org/D68746

llvm-svn: 374937

1 files changed, 3 insertions, 17 deletions

diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.h b/clang/lib/CodeGen/CGOpenMPRuntime.h
index 9215bd666c9..bf8e0ac8090 100644
--- a/clang/lib/CodeGen/CGOpenMPRuntime.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.h
@@ -672,14 +672,6 @@ private:
   /// Device routines are specific to the
   bool HasEmittedDeclareTargetRegion = false;
 
-  /// Creates and registers offloading binary descriptor for the current
-  /// compilation unit. The function that does the registration is returned.
-  llvm::Function *createOffloadingBinaryDescriptorRegistration();
-
-  /// Creates all the offload entries in the current compilation unit
-  /// along with the associated metadata.
-  void createOffloadEntriesAndInfoMetadata();
-
   /// Loads all the offload entries information from the host IR
   /// metadata.
   void loadOffloadInfoMetadata();
@@ -1492,10 +1484,9 @@ public:
   /// requires directives was used in the current module.
   llvm::Function *emitRequiresDirectiveRegFun();
 
-  /// Creates the offloading descriptor in the event any target region
-  /// was emitted in the current module and return the function that registers
-  /// it.
-  virtual llvm::Function *emitRegistrationFunction();
+  /// Creates all the offload entries in the current compilation unit
+  /// along with the associated metadata.
+  void createOffloadEntriesAndInfoMetadata();
 
   /// Emits code for teams call of the \a OutlinedFn with
   /// variables captured in a record which address is stored in \a
@@ -2167,11 +2158,6 @@ public:
   /// \param GD Global to scan.
   bool emitTargetGlobal(GlobalDecl GD) override;
 
-  /// Creates the offloading descriptor in the event any target region
-  /// was emitted in the current module and return the function that registers
-  /// it.
-  llvm::Function *emitRegistrationFunction() override;
-
   /// Emits code for teams call of the \a OutlinedFn with
   /// variables captured in a record which address is stored in \a
   /// CapturedStruct.