79 lines
2.5 KiB
C++
Executable File
79 lines
2.5 KiB
C++
Executable File
//===------ LeonPasses.cpp - Define passes specific to LEON ---------------===//
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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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//
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//===----------------------------------------------------------------------===//
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#include "LeonPasses.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/ISDOpcodes.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineRegisterInfo.h"
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using namespace llvm;
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LEONMachineFunctionPass::LEONMachineFunctionPass(TargetMachine &tm, char& ID) :
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MachineFunctionPass(ID)
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{
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}
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LEONMachineFunctionPass::LEONMachineFunctionPass(char& ID) :
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MachineFunctionPass(ID)
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{
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}
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//*****************************************************************************
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//**** InsertNOPLoad pass
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//*****************************************************************************
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//This pass inserts a NOP after any LD or LDF instruction.
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//
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char InsertNOPLoad::ID = 0;
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InsertNOPLoad::InsertNOPLoad(TargetMachine &tm) :
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LEONMachineFunctionPass(tm, ID)
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{
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}
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bool InsertNOPLoad::runOnMachineFunction(MachineFunction& MF)
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{
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Subtarget = &MF.getSubtarget<SparcSubtarget>();
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const TargetInstrInfo& TII = *Subtarget->getInstrInfo();
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DebugLoc DL = DebugLoc();
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bool Modified = false;
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for (auto MFI = MF.begin(), E = MF.end(); MFI != E; ++MFI) {
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MachineBasicBlock &MBB = *MFI;
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for (auto MBBI = MBB.begin(), E = MBB.end(); MBBI != E; ++ MBBI) {
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MachineInstr &MI = *MBBI;
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unsigned Opcode = MI.getOpcode();
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if (Opcode >= SP::LDDArr && Opcode <= SP::LDrr) {
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//errs() << "Inserting NOP after LD instruction\n";
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MachineBasicBlock::iterator NMBBI = std::next(MBBI);
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BuildMI(MBB, NMBBI, DL, TII.get(SP::NOP));
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Modified = true;
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}
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else if (MI.isInlineAsm()) {
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// Look for an inline ld or ldf instruction.
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StringRef AsmString =
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MI.getOperand(InlineAsm::MIOp_AsmString).getSymbolName();
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if (AsmString.startswith_lower("ld")) {
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//errs() << "Inserting NOP after LD instruction\n";
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MachineBasicBlock::iterator NMBBI = std::next(MBBI);
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BuildMI(MBB, NMBBI, DL, TII.get(SP::NOP));
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Modified = true;
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}
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}
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}
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}
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return Modified;
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}
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