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thirdparty/capstone/suite/synctools/tablegen/include/llvm/IR/ReplaceConstant.h

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+//===- ReplaceConstant.h - Replacing LLVM constant expressions --*- 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 declares the utility function for replacing LLVM constant
+// expressions by instructions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_REPLACECONSTANT_H
+#define LLVM_IR_REPLACECONSTANT_H
+
+#include <map>
+#include <vector>
+
+namespace llvm {
+
+class ConstantExpr;
+class Instruction;
+class Use;
+template <typename PtrType> class SmallPtrSetImpl;
+
+/// The given instruction \p I contains given constant expression \p CE as one
+/// of its operands, possibly nested within constant expression trees. Convert
+/// all reachable paths from constant expression operands of \p I to \p CE into
+/// corresponding instructions, insert them before \p I, update operands of \p I
+/// accordingly, and if required, return all such converted instructions at
+/// \p Insts.
+void convertConstantExprsToInstructions(
+    Instruction *I, ConstantExpr *CE,
+    SmallPtrSetImpl<Instruction *> *Insts = nullptr);
+
+/// The given instruction \p I contains constant expression CE within the
+/// constant expression trees of it`s constant expression operands, and
+/// \p CEPaths holds all the reachable paths (to CE) from such constant
+/// expression trees of \p I. Convert constant expressions within these paths
+/// into corresponding instructions, insert them before \p I, update operands of
+/// \p I accordingly, and if required, return all such converted instructions at
+/// \p Insts.
+void convertConstantExprsToInstructions(
+    Instruction *I,
+    std::map<Use *, std::vector<std::vector<ConstantExpr *>>> &CEPaths,
+    SmallPtrSetImpl<Instruction *> *Insts = nullptr);
+
+/// Given an instruction \p I which uses given constant expression \p CE as
+/// operand, either directly or nested within other constant expressions, return
+/// all reachable paths from the constant expression operands of \p I to \p CE,
+/// and return collected paths at \p CEPaths.
+void collectConstantExprPaths(
+    Instruction *I, ConstantExpr *CE,
+    std::map<Use *, std::vector<std::vector<ConstantExpr *>>> &CEPaths);
+
+} // end namespace llvm
+
+#endif // LLVM_IR_REPLACECONSTANT_H