diff options
Diffstat (limited to 'lib/Target/Alpha')
-rw-r--r-- | lib/Target/Alpha/Alpha.h | 7 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaFrameInfo.cpp | 140 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaFrameInfo.h | 41 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaRegisterInfo.cpp | 127 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaRegisterInfo.h | 8 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaTargetMachine.cpp | 2 | ||||
-rw-r--r-- | lib/Target/Alpha/AlphaTargetMachine.h | 9 |
7 files changed, 204 insertions, 130 deletions
diff --git a/lib/Target/Alpha/Alpha.h b/lib/Target/Alpha/Alpha.h index 5cf4866..2c359da 100644 --- a/lib/Target/Alpha/Alpha.h +++ b/lib/Target/Alpha/Alpha.h @@ -18,6 +18,13 @@ #include "llvm/Target/TargetMachine.h" namespace llvm { + namespace Alpha { + // These describe LDAx + + static const int IMM_LOW = -32768; + static const int IMM_HIGH = 32767; + static const int IMM_MULT = 65536; + } class AlphaTargetMachine; class FunctionPass; diff --git a/lib/Target/Alpha/AlphaFrameInfo.cpp b/lib/Target/Alpha/AlphaFrameInfo.cpp new file mode 100644 index 0000000..601e5db --- /dev/null +++ b/lib/Target/Alpha/AlphaFrameInfo.cpp @@ -0,0 +1,140 @@ +//=====- AlphaFrameInfo.cpp - Alpha Frame 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 TargetFrameInfo class. +// +//===----------------------------------------------------------------------===// + +#include "AlphaFrameInfo.h" +#include "AlphaInstrInfo.h" +#include "AlphaMachineFunctionInfo.h" +#include "llvm/Function.h" +#include "llvm/CodeGen/MachineFrameInfo.h" +#include "llvm/CodeGen/MachineFunction.h" +#include "llvm/CodeGen/MachineInstrBuilder.h" +#include "llvm/ADT/Twine.h" + +using namespace llvm; + +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; +} + +void AlphaFrameInfo::emitPrologue(MachineFunction &MF) const { + MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB + MachineBasicBlock::iterator MBBI = MBB.begin(); + MachineFrameInfo *MFI = MF.getFrameInfo(); + const AlphaRegisterInfo *RegInfo = + static_cast<const AlphaRegisterInfo*>(MF.getTarget().getRegisterInfo()); + const AlphaInstrInfo &TII = + *static_cast<const AlphaInstrInfo*>(MF.getTarget().getInstrInfo()); + + DebugLoc dl = (MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc()); + bool FP = RegInfo->hasFP(MF); + + // Handle GOP offset + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAHg), Alpha::R29) + .addGlobalAddress(MF.getFunction()).addReg(Alpha::R27).addImm(++curgpdist); + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAg), Alpha::R29) + .addGlobalAddress(MF.getFunction()).addReg(Alpha::R29).addImm(curgpdist); + + BuildMI(MBB, MBBI, dl, TII.get(Alpha::ALTENT)) + .addGlobalAddress(MF.getFunction()); + + // Get the number of bytes to allocate from the FrameInfo + long NumBytes = MFI->getStackSize(); + + if (FP) + NumBytes += 8; //reserve space for the old FP + + // Do we need to allocate space on the stack? + if (NumBytes == 0) return; + + unsigned Align = getStackAlignment(); + NumBytes = (NumBytes+Align-1)/Align*Align; + + // Update frame info to pretend that this is part of the stack... + MFI->setStackSize(NumBytes); + + // adjust stack pointer: r30 -= numbytes + NumBytes = -NumBytes; + if (NumBytes >= Alpha::IMM_LOW) { + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes) + .addReg(Alpha::R30); + } else if (getUpper16(NumBytes) >= Alpha::IMM_LOW) { + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30) + .addImm(getUpper16(NumBytes)).addReg(Alpha::R30); + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30) + .addImm(getLower16(NumBytes)).addReg(Alpha::R30); + } else { + report_fatal_error("Too big a stack frame at " + Twine(NumBytes)); + } + + // Now if we need to, save the old FP and set the new + if (FP) { + BuildMI(MBB, MBBI, dl, TII.get(Alpha::STQ)) + .addReg(Alpha::R15).addImm(0).addReg(Alpha::R30); + // This must be the last instr in the prolog + BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R15) + .addReg(Alpha::R30).addReg(Alpha::R30); + } + +} + +void AlphaFrameInfo::emitEpilogue(MachineFunction &MF, + MachineBasicBlock &MBB) const { + const MachineFrameInfo *MFI = MF.getFrameInfo(); + MachineBasicBlock::iterator MBBI = prior(MBB.end()); + const AlphaRegisterInfo *RegInfo = + static_cast<const AlphaRegisterInfo*>(MF.getTarget().getRegisterInfo()); + const AlphaInstrInfo &TII = + *static_cast<const AlphaInstrInfo*>(MF.getTarget().getInstrInfo()); + + assert((MBBI->getOpcode() == Alpha::RETDAG || + MBBI->getOpcode() == Alpha::RETDAGp) + && "Can only insert epilog into returning blocks"); + DebugLoc dl = MBBI->getDebugLoc(); + + bool FP = RegInfo->hasFP(MF); + + // Get the number of bytes allocated from the FrameInfo... + long NumBytes = MFI->getStackSize(); + + //now if we need to, restore the old FP + if (FP) { + //copy the FP into the SP (discards allocas) + BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R30).addReg(Alpha::R15) + .addReg(Alpha::R15); + //restore the FP + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDQ), Alpha::R15) + .addImm(0).addReg(Alpha::R15); + } + + if (NumBytes != 0) { + if (NumBytes <= Alpha::IMM_HIGH) { + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes) + .addReg(Alpha::R30); + } else if (getUpper16(NumBytes) <= Alpha::IMM_HIGH) { + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30) + .addImm(getUpper16(NumBytes)).addReg(Alpha::R30); + BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30) + .addImm(getLower16(NumBytes)).addReg(Alpha::R30); + } else { + report_fatal_error("Too big a stack frame at " + Twine(NumBytes)); + } + } +} diff --git a/lib/Target/Alpha/AlphaFrameInfo.h b/lib/Target/Alpha/AlphaFrameInfo.h new file mode 100644 index 0000000..df23523 --- /dev/null +++ b/lib/Target/Alpha/AlphaFrameInfo.h @@ -0,0 +1,41 @@ +//===--- AlphaFrameInfo.h - Define TargetFrameInfo for Alpha --*- C++ -*---===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// +// +// +// +//===----------------------------------------------------------------------===// + +#ifndef ALPHA_FRAMEINFO_H +#define ALPHA_FRAMEINFO_H + +#include "Alpha.h" +#include "AlphaSubtarget.h" +#include "llvm/Target/TargetFrameInfo.h" + +namespace llvm { + class AlphaSubtarget; + +class AlphaFrameInfo : public TargetFrameInfo { + const AlphaSubtarget &STI; + // FIXME: This should end in MachineFunctionInfo, not here! + mutable int curgpdist; +public: + explicit AlphaFrameInfo(const AlphaSubtarget &sti) + : TargetFrameInfo(StackGrowsDown, 16, 0), STI(sti), curgpdist(0) { + } + + /// emitProlog/emitEpilog - These methods insert prolog and epilog code into + /// the function. + void emitPrologue(MachineFunction &MF) const; + void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; +}; + +} // End llvm namespace + +#endif diff --git a/lib/Target/Alpha/AlphaRegisterInfo.cpp b/lib/Target/Alpha/AlphaRegisterInfo.cpp index 327ddb4..001922d 100644 --- a/lib/Target/Alpha/AlphaRegisterInfo.cpp +++ b/lib/Target/Alpha/AlphaRegisterInfo.cpp @@ -35,29 +35,21 @@ #include <cstdlib> using namespace llvm; -//These describe LDAx -static const int IMM_LOW = -32768; -static const int IMM_HIGH = 32767; -static const int IMM_MULT = 65536; +AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii) + : AlphaGenRegisterInfo(Alpha::ADJUSTSTACKDOWN, Alpha::ADJUSTSTACKUP), + TII(tii) { +} -static long getUpper16(long l) -{ - long y = l / IMM_MULT; - if (l % IMM_MULT > IMM_HIGH) +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) -{ +static long getLower16(long l) { long h = getUpper16(l); - return l - h * IMM_MULT; -} - -AlphaRegisterInfo::AlphaRegisterInfo(const TargetInstrInfo &tii) - : AlphaGenRegisterInfo(Alpha::ADJUSTSTACKDOWN, Alpha::ADJUSTSTACKUP), - TII(tii), curgpdist(0) -{ + return l - h * Alpha::IMM_MULT; } const unsigned* AlphaRegisterInfo::getCalleeSavedRegs(const MachineFunction *MF) @@ -168,7 +160,7 @@ AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, DEBUG(errs() << "Corrected Offset " << Offset << " for stack size: " << MF.getFrameInfo()->getStackSize() << "\n"); - if (Offset > IMM_HIGH || Offset < IMM_LOW) { + 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 @@ -186,105 +178,6 @@ AlphaRegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II, } } - -void AlphaRegisterInfo::emitPrologue(MachineFunction &MF) const { - MachineBasicBlock &MBB = MF.front(); // Prolog goes in entry BB - MachineBasicBlock::iterator MBBI = MBB.begin(); - MachineFrameInfo *MFI = MF.getFrameInfo(); - DebugLoc dl = (MBBI != MBB.end() ? MBBI->getDebugLoc() : DebugLoc()); - bool FP = hasFP(MF); - - //handle GOP offset - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAHg), Alpha::R29) - .addGlobalAddress(MF.getFunction()) - .addReg(Alpha::R27).addImm(++curgpdist); - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAg), Alpha::R29) - .addGlobalAddress(MF.getFunction()) - .addReg(Alpha::R29).addImm(curgpdist); - - BuildMI(MBB, MBBI, dl, TII.get(Alpha::ALTENT)) - .addGlobalAddress(MF.getFunction()); - - // Get the number of bytes to allocate from the FrameInfo - long NumBytes = MFI->getStackSize(); - - if (FP) - NumBytes += 8; //reserve space for the old FP - - // Do we need to allocate space on the stack? - if (NumBytes == 0) return; - - unsigned Align = MF.getTarget().getFrameInfo()->getStackAlignment(); - NumBytes = (NumBytes+Align-1)/Align*Align; - - // Update frame info to pretend that this is part of the stack... - MFI->setStackSize(NumBytes); - - // adjust stack pointer: r30 -= numbytes - NumBytes = -NumBytes; - if (NumBytes >= IMM_LOW) { - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes) - .addReg(Alpha::R30); - } else if (getUpper16(NumBytes) >= IMM_LOW) { - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30) - .addImm(getUpper16(NumBytes)).addReg(Alpha::R30); - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30) - .addImm(getLower16(NumBytes)).addReg(Alpha::R30); - } else { - report_fatal_error("Too big a stack frame at " + Twine(NumBytes)); - } - - //now if we need to, save the old FP and set the new - if (FP) - { - BuildMI(MBB, MBBI, dl, TII.get(Alpha::STQ)) - .addReg(Alpha::R15).addImm(0).addReg(Alpha::R30); - //this must be the last instr in the prolog - BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R15) - .addReg(Alpha::R30).addReg(Alpha::R30); - } - -} - -void AlphaRegisterInfo::emitEpilogue(MachineFunction &MF, - MachineBasicBlock &MBB) const { - const MachineFrameInfo *MFI = MF.getFrameInfo(); - MachineBasicBlock::iterator MBBI = prior(MBB.end()); - assert((MBBI->getOpcode() == Alpha::RETDAG || - MBBI->getOpcode() == Alpha::RETDAGp) - && "Can only insert epilog into returning blocks"); - DebugLoc dl = MBBI->getDebugLoc(); - - bool FP = hasFP(MF); - - // Get the number of bytes allocated from the FrameInfo... - long NumBytes = MFI->getStackSize(); - - //now if we need to, restore the old FP - if (FP) { - //copy the FP into the SP (discards allocas) - BuildMI(MBB, MBBI, dl, TII.get(Alpha::BISr), Alpha::R30).addReg(Alpha::R15) - .addReg(Alpha::R15); - //restore the FP - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDQ), Alpha::R15) - .addImm(0).addReg(Alpha::R15); - } - - if (NumBytes != 0) { - if (NumBytes <= IMM_HIGH) { - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30).addImm(NumBytes) - .addReg(Alpha::R30); - } else if (getUpper16(NumBytes) <= IMM_HIGH) { - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDAH), Alpha::R30) - .addImm(getUpper16(NumBytes)).addReg(Alpha::R30); - BuildMI(MBB, MBBI, dl, TII.get(Alpha::LDA), Alpha::R30) - .addImm(getLower16(NumBytes)).addReg(Alpha::R30); - } else { - report_fatal_error("Too big a stack frame at " + Twine(NumBytes)); - } - } -} - unsigned AlphaRegisterInfo::getRARegister() const { return Alpha::R26; } diff --git a/lib/Target/Alpha/AlphaRegisterInfo.h b/lib/Target/Alpha/AlphaRegisterInfo.h index b164979..9ff4175 100644 --- a/lib/Target/Alpha/AlphaRegisterInfo.h +++ b/lib/Target/Alpha/AlphaRegisterInfo.h @@ -41,11 +41,6 @@ struct AlphaRegisterInfo : public AlphaGenRegisterInfo { void eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj, RegScavenger *RS = NULL) const; - //void processFunctionBeforeFrameFinalized(MachineFunction &MF) const; - - void emitPrologue(MachineFunction &MF) const; - void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; - // Debug information queries. unsigned getRARegister() const; unsigned getFrameRegister(const MachineFunction &MF) const; @@ -57,9 +52,6 @@ struct AlphaRegisterInfo : public AlphaGenRegisterInfo { int getDwarfRegNum(unsigned RegNum, bool isEH) const; static std::string getPrettyName(unsigned reg); - -private: - mutable int curgpdist; }; } // end namespace llvm diff --git a/lib/Target/Alpha/AlphaTargetMachine.cpp b/lib/Target/Alpha/AlphaTargetMachine.cpp index cfc8b35..ee194d9 100644 --- a/lib/Target/Alpha/AlphaTargetMachine.cpp +++ b/lib/Target/Alpha/AlphaTargetMachine.cpp @@ -28,7 +28,7 @@ AlphaTargetMachine::AlphaTargetMachine(const Target &T, const std::string &TT, const std::string &FS) : LLVMTargetMachine(T, TT), DataLayout("e-f128:128:128-n64"), - FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0), + FrameInfo(Subtarget), Subtarget(TT, FS), TLInfo(*this), TSInfo(*this) { diff --git a/lib/Target/Alpha/AlphaTargetMachine.h b/lib/Target/Alpha/AlphaTargetMachine.h index d416d54..43b7070 100644 --- a/lib/Target/Alpha/AlphaTargetMachine.h +++ b/lib/Target/Alpha/AlphaTargetMachine.h @@ -14,13 +14,14 @@ #ifndef ALPHA_TARGETMACHINE_H #define ALPHA_TARGETMACHINE_H -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetFrameInfo.h" #include "AlphaInstrInfo.h" #include "AlphaISelLowering.h" +#include "AlphaFrameInfo.h" #include "AlphaSelectionDAGInfo.h" #include "AlphaSubtarget.h" +#include "llvm/Target/TargetMachine.h" +#include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetFrameInfo.h" namespace llvm { @@ -29,7 +30,7 @@ class GlobalValue; class AlphaTargetMachine : public LLVMTargetMachine { const TargetData DataLayout; // Calculates type size & alignment AlphaInstrInfo InstrInfo; - TargetFrameInfo FrameInfo; + AlphaFrameInfo FrameInfo; AlphaSubtarget Subtarget; AlphaTargetLowering TLInfo; AlphaSelectionDAGInfo TSInfo; |