Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 42 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/Transforms/Utils/SplitModule.h b/clang-r353983/include/llvm/Transforms/Utils/SplitModule.h
new file mode 100644
index 00000000..7839c5d9
--- /dev/null
+++ b/clang-r353983/include/llvm/Transforms/Utils/SplitModule.h
@@ -0,0 +1,42 @@
+//===- SplitModule.h - Split a module into partitions -----------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the function llvm::SplitModule, which splits a module
+// into multiple linkable partitions. It can be used to implement parallel code
+// generation for link-time optimization.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
+#define LLVM_TRANSFORMS_UTILS_SPLITMODULE_H
+
+#include "llvm/ADT/STLExtras.h"
+#include <memory>
+
+namespace llvm {
+
+class Module;
+
+/// Splits the module M into N linkable partitions. The function ModuleCallback
+/// is called N times passing each individual partition as the MPart argument.
+///
+/// FIXME: This function does not deal with the somewhat subtle symbol
+/// visibility issues around module splitting, including (but not limited to):
+///
+/// - Internal symbols should not collide with symbols defined outside the
+///   module.
+/// - Internal symbols defined in module-level inline asm should be visible to
+///   each partition.
+void SplitModule(
+    std::unique_ptr<Module> M, unsigned N,
+    function_ref<void(std::unique_ptr<Module> MPart)> ModuleCallback,
+    bool PreserveLocals = false);
+
+} // end namespace llvm
+
+#endif // LLVM_TRANSFORMS_UTILS_SPLITMODULE_H