| //===--- AMDILLiteralManager.cpp - AMDIL Literal Manager Pass --*- C++ -*--===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //==-----------------------------------------------------------------------===// |
| |
| #define DEBUG_TYPE "literal_manager" |
| |
| #include "AMDIL.h" |
| |
| #include "AMDILAlgorithms.tpp" |
| #include "AMDILKernelManager.h" |
| #include "AMDILMachineFunctionInfo.h" |
| #include "AMDILSubtarget.h" |
| #include "AMDILTargetMachine.h" |
| #include "llvm/CodeGen/MachineFunctionPass.h" |
| #include "llvm/CodeGen/Passes.h" |
| #include "llvm/Support/Debug.h" |
| #include "llvm/Target/TargetMachine.h" |
| |
| using namespace llvm; |
| |
| |
| // AMDIL Literal Manager traverses through all of the LOADCONST instructions and |
| // converts them from an immediate value to the literal index. The literal index |
| // is valid IL, but the immediate values are not. The Immediate values must be |
| // aggregated and declared for clarity and to reduce the number of literals that |
| // are used. It is also illegal to declare the same literal twice, so this keeps |
| // that from occuring. |
| |
| namespace { |
| class AMDILLiteralManager : public MachineFunctionPass { |
| public: |
| static char ID; |
| AMDILLiteralManager(TargetMachine &tm AMDIL_OPT_LEVEL_DECL); |
| virtual const char *getPassName() const; |
| |
| bool runOnMachineFunction(MachineFunction &MF); |
| private: |
| bool trackLiterals(MachineBasicBlock::iterator *bbb); |
| TargetMachine &TM; |
| const AMDILSubtarget *mSTM; |
| AMDILKernelManager *mKM; |
| AMDILMachineFunctionInfo *mMFI; |
| int32_t mLitIdx; |
| bool mChanged; |
| }; |
| char AMDILLiteralManager::ID = 0; |
| } |
| |
| namespace llvm { |
| FunctionPass * |
| createAMDILLiteralManager(TargetMachine &tm AMDIL_OPT_LEVEL_DECL) { |
| return new AMDILLiteralManager(tm AMDIL_OPT_LEVEL_VAR); |
| } |
| |
| } |
| |
| AMDILLiteralManager::AMDILLiteralManager(TargetMachine &tm |
| AMDIL_OPT_LEVEL_DECL) |
| : MachineFunctionPass(ID), |
| TM(tm) { |
| } |
| |
| bool AMDILLiteralManager::runOnMachineFunction(MachineFunction &MF) { |
| mChanged = false; |
| mMFI = MF.getInfo<AMDILMachineFunctionInfo>(); |
| const AMDILTargetMachine *amdtm = |
| reinterpret_cast<const AMDILTargetMachine *>(&TM); |
| mSTM = dynamic_cast<const AMDILSubtarget *>(amdtm->getSubtargetImpl()); |
| mKM = const_cast<AMDILKernelManager *>(mSTM->getKernelManager()); |
| safeNestedForEach(MF.begin(), MF.end(), MF.begin()->begin(), |
| std::bind1st(std::mem_fun(&AMDILLiteralManager::trackLiterals), this)); |
| return mChanged; |
| } |
| |
| bool AMDILLiteralManager::trackLiterals(MachineBasicBlock::iterator *bbb) { |
| MachineInstr *MI = *bbb; |
| uint32_t Opcode = MI->getOpcode(); |
| switch(Opcode) { |
| default: |
| return false; |
| case AMDIL::LOADCONST_i8: |
| case AMDIL::LOADCONST_i16: |
| case AMDIL::LOADCONST_i32: |
| case AMDIL::LOADCONST_i64: |
| case AMDIL::LOADCONST_f32: |
| case AMDIL::LOADCONST_f64: |
| break; |
| }; |
| MachineOperand &dstOp = MI->getOperand(0); |
| MachineOperand &litOp = MI->getOperand(1); |
| if (!litOp.isImm() && !litOp.isFPImm()) { |
| return false; |
| } |
| if (!dstOp.isReg()) { |
| return false; |
| } |
| // Change the literal to the correct index for each literal that is found. |
| if (litOp.isImm()) { |
| int64_t immVal = litOp.getImm(); |
| uint32_t idx = MI->getOpcode() == AMDIL::LOADCONST_i64 |
| ? mMFI->addi64Literal(immVal) |
| : mMFI->addi32Literal(static_cast<int>(immVal), Opcode); |
| litOp.ChangeToImmediate(idx); |
| return false; |
| } |
| |
| if (litOp.isFPImm()) { |
| const ConstantFP *fpVal = litOp.getFPImm(); |
| uint32_t idx = MI->getOpcode() == AMDIL::LOADCONST_f64 |
| ? mMFI->addf64Literal(fpVal) |
| : mMFI->addf32Literal(fpVal); |
| litOp.ChangeToImmediate(idx); |
| return false; |
| } |
| |
| return false; |
| } |
| |
| const char* AMDILLiteralManager::getPassName() const { |
| return "AMDIL Constant Propagation"; |
| } |
| |
| |