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

1 files changed, 73 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/Transforms/InstCombine/InstCombine.h b/clang-r353983/include/llvm/Transforms/InstCombine/InstCombine.h
new file mode 100644
index 00000000..8894d96e
--- /dev/null
+++ b/clang-r353983/include/llvm/Transforms/InstCombine/InstCombine.h
@@ -0,0 +1,73 @@
+//===- InstCombine.h - InstCombine pass -------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+/// \file
+///
+/// This file provides the primary interface to the instcombine pass. This pass
+/// is suitable for use in the new pass manager. For a pass that works with the
+/// legacy pass manager, use \c createInstructionCombiningPass().
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_INSTCOMBINE_INSTCOMBINE_H
+#define LLVM_TRANSFORMS_INSTCOMBINE_INSTCOMBINE_H
+
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+#include "llvm/Transforms/InstCombine/InstCombineWorklist.h"
+
+namespace llvm {
+
+class InstCombinePass : public PassInfoMixin<InstCombinePass> {
+  InstCombineWorklist Worklist;
+  bool ExpensiveCombines;
+
+public:
+  static StringRef name() { return "InstCombinePass"; }
+
+  explicit InstCombinePass(bool ExpensiveCombines = true)
+      : ExpensiveCombines(ExpensiveCombines) {}
+
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+};
+
+/// The legacy pass manager's instcombine pass.
+///
+/// This is a basic whole-function wrapper around the instcombine utility. It
+/// will try to combine all instructions in the function.
+class InstructionCombiningPass : public FunctionPass {
+  InstCombineWorklist Worklist;
+  const bool ExpensiveCombines;
+
+public:
+  static char ID; // Pass identification, replacement for typeid
+
+  InstructionCombiningPass(bool ExpensiveCombines = true)
+      : FunctionPass(ID), ExpensiveCombines(ExpensiveCombines) {
+    initializeInstructionCombiningPassPass(*PassRegistry::getPassRegistry());
+  }
+
+  void getAnalysisUsage(AnalysisUsage &AU) const override;
+  bool runOnFunction(Function &F) override;
+};
+
+//===----------------------------------------------------------------------===//
+//
+// InstructionCombining - Combine instructions to form fewer, simple
+// instructions. This pass does not modify the CFG, and has a tendency to make
+// instructions dead, so a subsequent DCE pass is useful.
+//
+// This pass combines things like:
+//    %Y = add int 1, %X
+//    %Z = add int 1, %Y
+// into:
+//    %Z = add int 2, %X
+//
+FunctionPass *createInstructionCombiningPass(bool ExpensiveCombines = true);
+}
+
+#endif