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https://github.com/c64scene-ar/llvm-6502.git
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ad2afc2a42
shouldn't do AU.setPreservesCFG(), because even though CodeGen passes don't modify the LLVM IR CFG, they may modify the MachineFunction CFG, and passes like MachineLoop are registered with isCFGOnly set to true. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77691 91177308-0d34-0410-b5e6-96231b3b80d8
52 lines
1.9 KiB
C++
52 lines
1.9 KiB
C++
//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines the MachineFunctionPass class. MachineFunctionPass's are
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// just FunctionPass's, except they operate on machine code as part of a code
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// generator. Because they operate on machine code, not the LLVM
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// representation, MachineFunctionPass's are not allowed to modify the LLVM
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// representation. Due to this limitation, the MachineFunctionPass class takes
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// care of declaring that no LLVM passes are invalidated.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
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#define LLVM_CODEGEN_MACHINE_FUNCTION_PASS_H
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#include "llvm/Pass.h"
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#include "llvm/CodeGen/MachineFunction.h"
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namespace llvm {
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/// MachineFunctionPass - This class adapts the FunctionPass interface to
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/// allow convenient creation of passes that operate on the MachineFunction
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/// representation. Instead of overriding runOnFunction, subclasses
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/// override runOnMachineFunction.
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class MachineFunctionPass : public FunctionPass {
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protected:
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explicit MachineFunctionPass(intptr_t ID) : FunctionPass(ID) {}
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explicit MachineFunctionPass(void *ID) : FunctionPass(ID) {}
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/// runOnMachineFunction - This method must be overloaded to perform the
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/// desired machine code transformation or analysis.
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///
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virtual bool runOnMachineFunction(MachineFunction &MF) = 0;
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/// getAnalysisUsage - Subclasses that override getAnalysisUsage
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/// must call this.
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virtual void getAnalysisUsage(AnalysisUsage &AU) const;
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private:
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bool runOnFunction(Function &F);
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};
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} // End llvm namespace
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#endif
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