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

1 files changed, 50 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/Transforms/Scalar/Float2Int.h b/clang-r353983/include/llvm/Transforms/Scalar/Float2Int.h
new file mode 100644
index 00000000..06aeb832
--- /dev/null
+++ b/clang-r353983/include/llvm/Transforms/Scalar/Float2Int.h
@@ -0,0 +1,50 @@
+//===-- Float2Int.h - Demote floating point ops to work on integers -------===//
+//
+// 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 provides the Float2Int pass, which aims to demote floating
+// point operations to work on integers, where that is losslessly possible.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H
+#define LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H
+
+#include "llvm/ADT/EquivalenceClasses.h"
+#include "llvm/ADT/MapVector.h"
+#include "llvm/IR/ConstantRange.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+class Float2IntPass : public PassInfoMixin<Float2IntPass> {
+public:
+  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
+
+  // Glue for old PM.
+  bool runImpl(Function &F);
+
+private:
+  void findRoots(Function &F, SmallPtrSet<Instruction *, 8> &Roots);
+  void seen(Instruction *I, ConstantRange R);
+  ConstantRange badRange();
+  ConstantRange unknownRange();
+  ConstantRange validateRange(ConstantRange R);
+  void walkBackwards(const SmallPtrSetImpl<Instruction *> &Roots);
+  void walkForwards();
+  bool validateAndTransform();
+  Value *convert(Instruction *I, Type *ToTy);
+  void cleanup();
+
+  MapVector<Instruction *, ConstantRange> SeenInsts;
+  SmallPtrSet<Instruction *, 8> Roots;
+  EquivalenceClasses<Instruction *> ECs;
+  MapVector<Instruction *, Value *> ConvertedInsts;
+  LLVMContext *Ctx;
+};
+}
+#endif // LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H