-//===- MBlazeRegisterInfo.cpp - MBlaze Register Information -== -*- C++ -*-===//
+//===-- MBlazeRegisterInfo.cpp - MBlaze Register Information --------------===//
//
// The LLVM Compiler Infrastructure
//
#define DEBUG_TYPE "mblaze-frame-info"
-#include "MBlaze.h"
-#include "MBlazeSubtarget.h"
#include "MBlazeRegisterInfo.h"
+#include "MBlaze.h"
#include "MBlazeMachineFunction.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 "MBlazeSubtarget.h"
+#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/STLExtras.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/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineInstrBuilder.h"
+#include "llvm/CodeGen/ValueTypes.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/Type.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 "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetInstrInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Target/TargetOptions.h"
#define GET_REGINFO_TARGET_DESC
#include "MBlazeGenRegisterInfo.inc"
using namespace llvm;
MBlazeRegisterInfo::
-MBlazeRegisterInfo(const MBlazeSubtarget &ST, const TargetInstrInfo &tii)
- : MBlazeGenRegisterInfo(MBlaze::R15), Subtarget(ST), TII(tii) {}
-
-/// getRegisterNumbering - Given the enum value for some register, e.g.
-/// MBlaze::R0, return the number that it corresponds to (e.g. 0).
-unsigned MBlazeRegisterInfo::getRegisterNumbering(unsigned RegEnum) {
- switch (RegEnum) {
- case MBlaze::R0 : return 0;
- case MBlaze::R1 : return 1;
- case MBlaze::R2 : return 2;
- case MBlaze::R3 : return 3;
- case MBlaze::R4 : return 4;
- case MBlaze::R5 : return 5;
- case MBlaze::R6 : return 6;
- case MBlaze::R7 : return 7;
- case MBlaze::R8 : return 8;
- case MBlaze::R9 : return 9;
- case MBlaze::R10 : return 10;
- case MBlaze::R11 : return 11;
- case MBlaze::R12 : return 12;
- case MBlaze::R13 : return 13;
- case MBlaze::R14 : return 14;
- case MBlaze::R15 : return 15;
- case MBlaze::R16 : return 16;
- case MBlaze::R17 : return 17;
- case MBlaze::R18 : return 18;
- case MBlaze::R19 : return 19;
- case MBlaze::R20 : return 20;
- case MBlaze::R21 : return 21;
- case MBlaze::R22 : return 22;
- case MBlaze::R23 : return 23;
- case MBlaze::R24 : return 24;
- case MBlaze::R25 : return 25;
- case MBlaze::R26 : return 26;
- case MBlaze::R27 : return 27;
- case MBlaze::R28 : return 28;
- case MBlaze::R29 : return 29;
- case MBlaze::R30 : return 30;
- case MBlaze::R31 : return 31;
- case MBlaze::RPC : return 0x0000;
- case MBlaze::RMSR : return 0x0001;
- case MBlaze::REAR : return 0x0003;
- case MBlaze::RESR : return 0x0005;
- case MBlaze::RFSR : return 0x0007;
- case MBlaze::RBTR : return 0x000B;
- case MBlaze::REDR : return 0x000D;
- case MBlaze::RPID : return 0x1000;
- case MBlaze::RZPR : return 0x1001;
- case MBlaze::RTLBX : return 0x1002;
- case MBlaze::RTLBLO : return 0x1003;
- case MBlaze::RTLBHI : return 0x1004;
- case MBlaze::RPVR0 : return 0x2000;
- case MBlaze::RPVR1 : return 0x2001;
- case MBlaze::RPVR2 : return 0x2002;
- case MBlaze::RPVR3 : return 0x2003;
- case MBlaze::RPVR4 : return 0x2004;
- case MBlaze::RPVR5 : return 0x2005;
- case MBlaze::RPVR6 : return 0x2006;
- case MBlaze::RPVR7 : return 0x2007;
- case MBlaze::RPVR8 : return 0x2008;
- case MBlaze::RPVR9 : return 0x2009;
- case MBlaze::RPVR10 : return 0x200A;
- case MBlaze::RPVR11 : return 0x200B;
- default: llvm_unreachable("Unknown register number!");
- }
- return 0; // Not reached
-}
-
-/// getRegisterFromNumbering - Given the enum value for some register, e.g.
-/// MBlaze::R0, return the number that it corresponds to (e.g. 0).
-unsigned MBlazeRegisterInfo::getRegisterFromNumbering(unsigned Reg) {
- switch (Reg) {
- case 0 : return MBlaze::R0;
- case 1 : return MBlaze::R1;
- case 2 : return MBlaze::R2;
- case 3 : return MBlaze::R3;
- case 4 : return MBlaze::R4;
- case 5 : return MBlaze::R5;
- case 6 : return MBlaze::R6;
- case 7 : return MBlaze::R7;
- case 8 : return MBlaze::R8;
- case 9 : return MBlaze::R9;
- case 10 : return MBlaze::R10;
- case 11 : return MBlaze::R11;
- case 12 : return MBlaze::R12;
- case 13 : return MBlaze::R13;
- case 14 : return MBlaze::R14;
- case 15 : return MBlaze::R15;
- case 16 : return MBlaze::R16;
- case 17 : return MBlaze::R17;
- case 18 : return MBlaze::R18;
- case 19 : return MBlaze::R19;
- case 20 : return MBlaze::R20;
- case 21 : return MBlaze::R21;
- case 22 : return MBlaze::R22;
- case 23 : return MBlaze::R23;
- case 24 : return MBlaze::R24;
- case 25 : return MBlaze::R25;
- case 26 : return MBlaze::R26;
- case 27 : return MBlaze::R27;
- case 28 : return MBlaze::R28;
- case 29 : return MBlaze::R29;
- case 30 : return MBlaze::R30;
- case 31 : return MBlaze::R31;
- default: llvm_unreachable("Unknown register number!");
- }
- return 0; // Not reached
-}
-
-unsigned MBlazeRegisterInfo::getSpecialRegisterFromNumbering(unsigned Reg) {
- switch (Reg) {
- case 0x0000 : return MBlaze::RPC;
- case 0x0001 : return MBlaze::RMSR;
- case 0x0003 : return MBlaze::REAR;
- case 0x0005 : return MBlaze::RESR;
- case 0x0007 : return MBlaze::RFSR;
- case 0x000B : return MBlaze::RBTR;
- case 0x000D : return MBlaze::REDR;
- case 0x1000 : return MBlaze::RPID;
- case 0x1001 : return MBlaze::RZPR;
- case 0x1002 : return MBlaze::RTLBX;
- case 0x1003 : return MBlaze::RTLBLO;
- case 0x1004 : return MBlaze::RTLBHI;
- case 0x2000 : return MBlaze::RPVR0;
- case 0x2001 : return MBlaze::RPVR1;
- case 0x2002 : return MBlaze::RPVR2;
- case 0x2003 : return MBlaze::RPVR3;
- case 0x2004 : return MBlaze::RPVR4;
- case 0x2005 : return MBlaze::RPVR5;
- case 0x2006 : return MBlaze::RPVR6;
- case 0x2007 : return MBlaze::RPVR7;
- case 0x2008 : return MBlaze::RPVR8;
- case 0x2009 : return MBlaze::RPVR9;
- case 0x200A : return MBlaze::RPVR10;
- case 0x200B : return MBlaze::RPVR11;
- default: llvm_unreachable("Unknown register number!");
- }
- return 0; // Not reached
-}
-
-bool MBlazeRegisterInfo::isRegister(unsigned Reg) {
- return Reg <= 31;
-}
-
-bool MBlazeRegisterInfo::isSpecialRegister(unsigned Reg) {
- switch (Reg) {
- case 0x0000 : case 0x0001 : case 0x0003 : case 0x0005 :
- case 0x0007 : case 0x000B : case 0x000D : case 0x1000 :
- case 0x1001 : case 0x1002 : case 0x1003 : case 0x1004 :
- case 0x2000 : case 0x2001 : case 0x2002 : case 0x2003 :
- case 0x2004 : case 0x2005 : case 0x2006 : case 0x2007 :
- case 0x2008 : case 0x2009 : case 0x200A : case 0x200B :
- return true;
-
- default:
- return false;
- }
- return false; // Not reached
-}
+MBlazeRegisterInfo(const MBlazeSubtarget &ST)
+ : MBlazeGenRegisterInfo(MBlaze::R15), Subtarget(ST) {}
unsigned MBlazeRegisterInfo::getPICCallReg() {
return MBlaze::R20;
//===----------------------------------------------------------------------===//
/// MBlaze Callee Saved Registers
-const unsigned* MBlazeRegisterInfo::
+const uint16_t* MBlazeRegisterInfo::
getCalleeSavedRegs(const MachineFunction *MF) const {
// MBlaze callee-save register range is R20 - R31
- static const unsigned CalleeSavedRegs[] = {
+ static const uint16_t CalleeSavedRegs[] = {
MBlaze::R20, MBlaze::R21, MBlaze::R22, MBlaze::R23,
MBlaze::R24, MBlaze::R25, MBlaze::R26, MBlaze::R27,
MBlaze::R28, MBlaze::R29, MBlaze::R30, MBlaze::R31,
return Reserved;
}
-// This function eliminate ADJCALLSTACKDOWN/ADJCALLSTACKUP pseudo instructions
-void MBlazeRegisterInfo::
-eliminateCallFramePseudoInstr(MachineFunction &MF, MachineBasicBlock &MBB,
- MachineBasicBlock::iterator I) const {
- const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
-
- if (!TFI->hasReservedCallFrame(MF)) {
- // If we have a frame pointer, turn the adjcallstackup instruction into a
- // 'addi r1, r1, -<amt>' and the adjcallstackdown instruction into
- // 'addi r1, r1, <amt>'
- MachineInstr *Old = I;
- int Amount = Old->getOperand(0).getImm() + 4;
- 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() == MBlaze::ADJCALLSTACKDOWN) {
- New = BuildMI(MF,Old->getDebugLoc(),TII.get(MBlaze::ADDIK),MBlaze::R1)
- .addReg(MBlaze::R1).addImm(-Amount);
- } else {
- assert(Old->getOpcode() == MBlaze::ADJCALLSTACKUP);
- New = BuildMI(MF,Old->getDebugLoc(),TII.get(MBlaze::ADDIK),MBlaze::R1)
- .addReg(MBlaze::R1).addImm(Amount);
- }
-
- // Replace the pseudo instruction with a new instruction...
- MBB.insert(I, New);
- }
- }
-
- // Simply discard ADJCALLSTACKDOWN, ADJCALLSTACKUP instructions.
- MBB.erase(I);
-}
-
// FrameIndex represent objects inside a abstract stack.
// We must replace FrameIndex with an stack/frame pointer
// direct reference.
void MBlazeRegisterInfo::
eliminateFrameIndex(MachineBasicBlock::iterator II, int SPAdj,
- RegScavenger *RS) const {
+ unsigned FIOperandNum, RegScavenger *RS) const {
MachineInstr &MI = *II;
MachineFunction &MF = *MI.getParent()->getParent();
MachineFrameInfo *MFI = MF.getFrameInfo();
+ unsigned OFIOperandNum = FIOperandNum == 2 ? 1 : 2;
- unsigned i = 0;
- while (!MI.getOperand(i).isFI()) {
- ++i;
- assert(i < MI.getNumOperands() &&
- "Instr doesn't have FrameIndex operand!");
- }
-
- unsigned oi = i == 2 ? 1 : 2;
-
- DEBUG(dbgs() << "\nFunction : " << MF.getFunction()->getName() << "\n";
+ DEBUG(dbgs() << "\nFunction : " << MF.getName() << "\n";
dbgs() << "<--------->\n" << MI);
- int FrameIndex = MI.getOperand(i).getIndex();
+ int FrameIndex = MI.getOperand(FIOperandNum).getIndex();
int stackSize = MFI->getStackSize();
int spOffset = MFI->getObjectOffset(FrameIndex);
// as explained on LowerFormalArguments, detect negative offsets
// and adjust SPOffsets considering the final stack size.
int Offset = (spOffset < 0) ? (stackSize - spOffset) : spOffset;
- Offset += MI.getOperand(oi).getImm();
+ Offset += MI.getOperand(OFIOperandNum).getImm();
DEBUG(dbgs() << "Offset : " << Offset << "\n" << "<--------->\n");
- MI.getOperand(oi).ChangeToImmediate(Offset);
- MI.getOperand(i).ChangeToRegister(getFrameRegister(MF), false);
+ MI.getOperand(OFIOperandNum).ChangeToImmediate(Offset);
+ MI.getOperand(FIOperandNum).ChangeToRegister(getFrameRegister(MF), false);
}
void MBlazeRegisterInfo::
-processFunctionBeforeFrameFinalized(MachineFunction &MF) const {
+processFunctionBeforeFrameFinalized(MachineFunction &MF, RegScavenger *) const {
// Set the stack offset where GP must be saved/loaded from.
MachineFrameInfo *MFI = MF.getFrameInfo();
MBlazeFunctionInfo *MBlazeFI = MF.getInfo<MBlazeFunctionInfo>();
unsigned MBlazeRegisterInfo::getEHExceptionRegister() const {
llvm_unreachable("What is the exception register");
- return 0;
}
unsigned MBlazeRegisterInfo::getEHHandlerRegister() const {
llvm_unreachable("What is the exception handler register");
- return 0;
}
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