diff options
| author | Stephen Hines <srhines@google.com> | 2019-07-02 16:25:20 -0700 |
|---|---|---|
| committer | Ali B <abittin@gmail.com> | 2019-07-05 19:33:16 +0300 |
| commit | 9afee4e65dc5f9f5eb371683729ff67b8df81d03 (patch) | |
| tree | 4cf241d6c9044f91ee8c06e6920174d06f8de0b6 /clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h | |
| parent | 2f19bd722c4c825320d1511c1ed83161b7f95d51 (diff) | |
clang 9.0.5 (based on r353983e) from build 5696680.
Bug: http://b/135931688
Bug: http://b/136008926
Test: N/A
Change-Id: I922d17410047d2e2df4625615352c588ee71b203
Diffstat (limited to 'clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h')
| -rw-r--r-- | clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h b/clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h new file mode 100644 index 00000000..caaf22c2 --- /dev/null +++ b/clang-r353983e/include/llvm/CodeGen/MachineFunctionPass.h @@ -0,0 +1,80 @@ +//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-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 MachineFunctionPass class. MachineFunctionPass's are +// just FunctionPass's, except they operate on machine code as part of a code +// generator. Because they operate on machine code, not the LLVM +// representation, MachineFunctionPass's are not allowed to modify the LLVM +// representation. Due to this limitation, the MachineFunctionPass class takes +// care of declaring that no LLVM passes are invalidated. +// +//===----------------------------------------------------------------------===// + +#ifndef LLVM_CODEGEN_MACHINEFUNCTIONPASS_H +#define LLVM_CODEGEN_MACHINEFUNCTIONPASS_H + +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/Pass.h" + +namespace llvm { + +/// MachineFunctionPass - This class adapts the FunctionPass interface to +/// allow convenient creation of passes that operate on the MachineFunction +/// representation. Instead of overriding runOnFunction, subclasses +/// override runOnMachineFunction. +class MachineFunctionPass : public FunctionPass { +public: + bool doInitialization(Module&) override { + // Cache the properties info at module-init time so we don't have to + // construct them for every function. + RequiredProperties = getRequiredProperties(); + SetProperties = getSetProperties(); + ClearedProperties = getClearedProperties(); + return false; + } +protected: + explicit MachineFunctionPass(char &ID) : FunctionPass(ID) {} + + /// runOnMachineFunction - This method must be overloaded to perform the + /// desired machine code transformation or analysis. + /// + virtual bool runOnMachineFunction(MachineFunction &MF) = 0; + + /// getAnalysisUsage - Subclasses that override getAnalysisUsage + /// must call this. + /// + /// For MachineFunctionPasses, calling AU.preservesCFG() indicates that + /// the pass does not modify the MachineBasicBlock CFG. + /// + void getAnalysisUsage(AnalysisUsage &AU) const override; + + virtual MachineFunctionProperties getRequiredProperties() const { + return MachineFunctionProperties(); + } + virtual MachineFunctionProperties getSetProperties() const { + return MachineFunctionProperties(); + } + virtual MachineFunctionProperties getClearedProperties() const { + return MachineFunctionProperties(); + } + +private: + MachineFunctionProperties RequiredProperties; + MachineFunctionProperties SetProperties; + MachineFunctionProperties ClearedProperties; + + /// createPrinterPass - Get a machine function printer pass. + Pass *createPrinterPass(raw_ostream &O, + const std::string &Banner) const override; + + bool runOnFunction(Function &F) override; +}; + +} // End llvm namespace + +#endif |
