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Diffstat (limited to 'lib/Target/R600/SILowerLiteralConstants.cpp')
-rw-r--r-- | lib/Target/R600/SILowerLiteralConstants.cpp | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/lib/Target/R600/SILowerLiteralConstants.cpp b/lib/Target/R600/SILowerLiteralConstants.cpp deleted file mode 100644 index 6f5fd36396..0000000000 --- a/lib/Target/R600/SILowerLiteralConstants.cpp +++ /dev/null @@ -1,107 +0,0 @@ -//===-- SILowerLiteralConstants.cpp - Lower intrs using literal constants--===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -/// \file -/// \brief This pass performs the following transformation on instructions with -/// literal constants: -/// -/// %VGPR0 = V_MOV_IMM_I32 1 -/// -/// becomes: -/// -/// BUNDLE -/// * %VGPR = V_MOV_B32_32 SI_LITERAL_CONSTANT -/// * SI_LOAD_LITERAL 1 -/// -/// The resulting sequence matches exactly how the hardware handles immediate -/// operands, so this transformation greatly simplifies the code generator. -/// -/// Only the *_MOV_IMM_* support immediate operands at the moment, but when -/// support for immediate operands is added to other instructions, they -/// will be lowered here as well. -//===----------------------------------------------------------------------===// - -#include "AMDGPU.h" -#include "llvm/CodeGen/MachineFunction.h" -#include "llvm/CodeGen/MachineFunctionPass.h" -#include "llvm/CodeGen/MachineInstrBuilder.h" -#include "llvm/CodeGen/MachineInstrBundle.h" - -using namespace llvm; - -namespace { - -class SILowerLiteralConstantsPass : public MachineFunctionPass { - -private: - static char ID; - const TargetInstrInfo *TII; - -public: - SILowerLiteralConstantsPass(TargetMachine &tm) : - MachineFunctionPass(ID), TII(tm.getInstrInfo()) { } - - virtual bool runOnMachineFunction(MachineFunction &MF); - - const char *getPassName() const { - return "SI Lower literal constants pass"; - } -}; - -} // End anonymous namespace - -char SILowerLiteralConstantsPass::ID = 0; - -FunctionPass *llvm::createSILowerLiteralConstantsPass(TargetMachine &tm) { - return new SILowerLiteralConstantsPass(tm); -} - -bool SILowerLiteralConstantsPass::runOnMachineFunction(MachineFunction &MF) { - for (MachineFunction::iterator BB = MF.begin(), BB_E = MF.end(); - BB != BB_E; ++BB) { - MachineBasicBlock &MBB = *BB; - for (MachineBasicBlock::iterator I = MBB.begin(), Next = llvm::next(I); - I != MBB.end(); I = Next) { - Next = llvm::next(I); - MachineInstr &MI = *I; - switch (MI.getOpcode()) { - default: break; - case AMDGPU::S_MOV_IMM_I32: - case AMDGPU::V_MOV_IMM_F32: - case AMDGPU::V_MOV_IMM_I32: { - unsigned MovOpcode; - unsigned LoadLiteralOpcode; - MachineOperand LiteralOp = MI.getOperand(1); - if (AMDGPU::VReg_32RegClass.contains(MI.getOperand(0).getReg())) { - MovOpcode = AMDGPU::V_MOV_B32_e32; - } else { - MovOpcode = AMDGPU::S_MOV_B32; - } - if (LiteralOp.isImm()) { - LoadLiteralOpcode = AMDGPU::SI_LOAD_LITERAL_I32; - } else { - LoadLiteralOpcode = AMDGPU::SI_LOAD_LITERAL_F32; - } - MIBundleBuilder Bundle(MBB, I); - Bundle - .append(BuildMI(MF, MBB.findDebugLoc(I), TII->get(MovOpcode), - MI.getOperand(0).getReg()) - .addReg(AMDGPU::SI_LITERAL_CONSTANT)) - .append(BuildMI(MF, MBB.findDebugLoc(I), - TII->get(LoadLiteralOpcode)) - .addOperand(MI.getOperand(1))); - llvm::finalizeBundle(MBB, Bundle.begin()); - MI.eraseFromParent(); - break; - } - } - } - } - return false; -} |