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Diffstat (limited to 'contrib/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp')
-rw-r--r-- | contrib/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/contrib/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp b/contrib/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp deleted file mode 100644 index 8b6230f..0000000 --- a/contrib/llvm/lib/Target/Alpha/AlphaRegisterInfo.cpp +++ /dev/null @@ -1,199 +0,0 @@ -//===- AlphaRegisterInfo.cpp - Alpha Register Information -------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file contains the Alpha implementation of the TargetRegisterInfo class. -// -//===----------------------------------------------------------------------===// - -#define DEBUG_TYPE "reginfo" -#include "Alpha.h" -#include "AlphaRegisterInfo.h" -#include "llvm/Constants.h" -#include "llvm/Type.h" -#include "llvm/Function.h" -#include "llvm/CodeGen/ValueTypes.h" -#include "llvm/CodeGen/MachineInstrBuilder.h" -#include "llvm/CodeGen/MachineFunction.h" -#include "llvm/CodeGen/MachineFrameInfo.h" -#include "llvm/Target/TargetFrameLowering.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" -#include "llvm/Target/TargetInstrInfo.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/ErrorHandling.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/ADT/BitVector.h" -#include "llvm/ADT/STLExtras.h" -#include <cstdlib> - -#define GET_REGINFO_TARGET_DESC -#include "AlphaGenRegisterInfo.inc" - -using namespace llvm; - -AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii) - : AlphaGenRegisterInfo(Alpha::R26), TII(tii) { -} - -static long getUpper16(long l) { - long y = l / Alpha::IMM_MULT; - if (l % Alpha::IMM_MULT > Alpha::IMM_HIGH) - ++y; - return y; -} - -static long getLower16(long l) { - long h = getUpper16(l); - return l - h * Alpha::IMM_MULT; -} - -const unsigned* AlphaRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) - const { - static const unsigned CalleeSavedRegs[] = { - Alpha::R9, Alpha::R10, - Alpha::R11, Alpha::R12, - Alpha::R13, Alpha::R14, - Alpha::F2, Alpha::F3, - Alpha::F4, Alpha::F5, - Alpha::F6, Alpha::F7, - Alpha::F8, Alpha::F9, 0 - }; - return CalleeSavedRegs; -} - -BitVector AlphaRegisterInfo::getReservedRegs(const MachineFunction &MF) const { - BitVector Reserved(getNumRegs()); - Reserved.set(Alpha::R15); - Reserved.set(Alpha::R29); - Reserved.set(Alpha::R30); - Reserved.set(Alpha::R31); - return Reserved; -} - -//===----------------------------------------------------------------------===// -// Stack Frame Processing methods -//===----------------------------------------------------------------------===// - -void AlphaRegisterInfo:: -eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB, - MachineBasicBlock::iterator I) const { - const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering(); - - if (TFI->hasFP(MF)) { - // If we have a frame pointer, turn the adjcallstackup instruction into a - // 'sub ESP, <amt>' and the adjcallstackdown instruction into 'add ESP, - // <amt>' - MachineInstr *Old = I; - uint64_t Amount = Old->getOperand(0).getImm(); - if (Amount != 0) { - // We need to keep the stack aligned properly. To do this, we round the - // amount of space needed for the outgoing arguments up to the next - // alignment boundary. - unsigned Align = TFI->getStackAlignment(); - Amount = (Amount+Align-1)/Align*Align; - - MachineInstr *New; - if (Old->getOpcode() == Alpha::ADJUSTSTACKDOWN) { - New=BuildMI(MF, Old->getDebugLoc(), TII.get(Alpha::LDA), Alpha::R30) - .addImm(-Amount).addReg(Alpha::R30); - } else { - assert(Old->getOpcode() == Alpha::ADJUSTSTACKUP); - New=BuildMI(MF, Old->getDebugLoc(), TII.get(Alpha::LDA), Alpha::R30) - .addImm(Amount).addReg(Alpha::R30); - } - - // Replace the pseudo instruction with a new instruction... - MBB.insert(I, New); - } - } - - MBB.erase(I); -} - -//Alpha has a slightly funny stack: -//Args -//<- incoming SP -//fixed locals (and spills, callee saved, etc) -//<- FP -//variable locals -//<- SP - -void -AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, - int SPAdj, RegScavenger *RS) const { - assert(SPAdj == 0 && "Unexpected"); - - unsigned i = 0; - MachineInstr &MI = *II; - MachineBasicBlock &MBB = *MI.getParent(); - MachineFunction &MF = *MBB.getParent(); - const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering(); - - bool FP = TFI->hasFP(MF); - - while (!MI.getOperand(i).isFI()) { - ++i; - assert(i < MI.getNumOperands() && "Instr doesn't have FrameIndex operand!"); - } - - int FrameIndex = MI.getOperand(i).getIndex(); - - // Add the base register of R30 (SP) or R15 (FP). - MI.getOperand(i + 1).ChangeToRegister(FP ? Alpha::R15 : Alpha::R30, false); - - // Now add the frame object offset to the offset from the virtual frame index. - int Offset = MF.getFrameInfo()->getObjectOffset(FrameIndex); - - DEBUG(errs() << "FI: " << FrameIndex << " Offset: " << Offset << "\n"); - - Offset += MF.getFrameInfo()->getStackSize(); - - DEBUG(errs() << "Corrected Offset " << Offset - << " for stack size: " << MF.getFrameInfo()->getStackSize() << "\n"); - - if (Offset > Alpha::IMM_HIGH || Offset < Alpha::IMM_LOW) { - DEBUG(errs() << "Unconditionally using R28 for evil purposes Offset: " - << Offset << "\n"); - //so in this case, we need to use a temporary register, and move the - //original inst off the SP/FP - //fix up the old: - MI.getOperand(i + 1).ChangeToRegister(Alpha::R28, false); - MI.getOperand(i).ChangeToImmediate(getLower16(Offset)); - //insert the new - MachineInstr* nMI=BuildMI(MF, MI.getDebugLoc(), - TII.get(Alpha::LDAH), Alpha::R28) - .addImm(getUpper16(Offset)).addReg(FP ? Alpha::R15 : Alpha::R30); - MBB.insert(II, nMI); - } else { - MI.getOperand(i).ChangeToImmediate(Offset); - } -} - -unsigned AlphaRegisterInfo::getFrameRegister(const MachineFunction &MF) const { - const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering(); - - return TFI->hasFP(MF) ? Alpha::R15 : Alpha::R30; -} - -unsigned AlphaRegisterInfo::getEHExceptionRegister() const { - llvm_unreachable("What is the exception register"); - return 0; -} - -unsigned AlphaRegisterInfo::getEHHandlerRegister() const { - llvm_unreachable("What is the exception handler register"); - return 0; -} - -std::string AlphaRegisterInfo::getPrettyName(unsigned reg) -{ - std::string s(AlphaRegDesc[reg].Name); - return s; -} |