X86RegisterInfo.h revision 6f0d024a534af18d9e60b3ea757376cd8a3a980e
1128aff4f9502a99af3573b98eb254490b3137646Chris Lattner//===- X86RegisterInfo.h - X86 Register Information Impl --------*- C++ -*-===// 20e0a7a45d3d0a8c865a078459d2e1c6d8967a100Misha Brukman// 3856ba76200ec2302f2fe500bc507f426c7d566c8John Criswell// The LLVM Compiler Infrastructure 4856ba76200ec2302f2fe500bc507f426c7d566c8John Criswell// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 70e0a7a45d3d0a8c865a078459d2e1c6d8967a100Misha Brukman// 8856ba76200ec2302f2fe500bc507f426c7d566c8John Criswell//===----------------------------------------------------------------------===// 9726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner// 106f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman// This file contains the X86 implementation of the TargetRegisterInfo class. 11726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner// 12726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner//===----------------------------------------------------------------------===// 13726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner 14726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner#ifndef X86REGISTERINFO_H 15726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner#define X86REGISTERINFO_H 16726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner 177f3394f3796883707961f2f61ea761cee15a0308Evan Cheng#include "llvm/ADT/DenseMap.h" 18f4c3a59dbaa5e7a91fb1db1f7f989ffb60d5b982Evan Cheng#include "llvm/ADT/SmallVector.h" 196f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman#include "llvm/Target/TargetRegisterInfo.h" 207ad3e063f508218a2823bd5cf092ef622ed7ba6cChris Lattner#include "X86GenRegisterInfo.h.inc" 216811c6e1d72e55f79202b69acd15f6098967913eChris Lattner 22d0fde30ce850b78371fd1386338350591f9ff494Brian Gaekenamespace llvm { 232926869b4a083fc951484de03a9867eabf81e880Chris Lattner class Type; 242926869b4a083fc951484de03a9867eabf81e880Chris Lattner class TargetInstrInfo; 2525ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng class X86TargetMachine; 26d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 27ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands/// N86 namespace - Native X86 register numbers 28ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands/// 29ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sandsnamespace N86 { 30ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands enum { 31ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands EAX = 0, ECX = 1, EDX = 2, EBX = 3, ESP = 4, EBP = 5, ESI = 6, EDI = 7 32ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands }; 33ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands} 34ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands 35f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov/// DWARFFlavour - Flavour of dwarf regnumbers 36f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov/// 37f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikovnamespace DWARFFlavour { 38f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov enum { 398eea3392984428930b287aecb160c2feda981a13Anton Korobeynikov X86_64 = 0, X86_32_DarwinEH = 1, X86_32_Generic = 2 40f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov }; 41f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov} 42f191c80cd79ee35e47b5a4feed98d687782dfe85Anton Korobeynikov 43d41b30def3181bce4bf87e8bde664d15663165d0Jeff Cohenclass X86RegisterInfo : public X86GenRegisterInfo { 44d41b30def3181bce4bf87e8bde664d15663165d0Jeff Cohenpublic: 4525ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng X86TargetMachine &TM; 462926869b4a083fc951484de03a9867eabf81e880Chris Lattner const TargetInstrInfo &TII; 47d41b30def3181bce4bf87e8bde664d15663165d0Jeff Cohen 4825ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Chengprivate: 4925ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng /// Is64Bit - Is the target 64-bits. 507f3394f3796883707961f2f61ea761cee15a0308Evan Cheng /// 5125ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng bool Is64Bit; 5225ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng 5325ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng /// SlotSize - Stack slot size in bytes. 547f3394f3796883707961f2f61ea761cee15a0308Evan Cheng /// 5525ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng unsigned SlotSize; 5625ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng 57db807edd66d6f6fd566a050f3b6f1af6f7c09082Evan Cheng /// StackAlign - Default stack alignment. 58db807edd66d6f6fd566a050f3b6f1af6f7c09082Evan Cheng /// 59db807edd66d6f6fd566a050f3b6f1af6f7c09082Evan Cheng unsigned StackAlign; 60db807edd66d6f6fd566a050f3b6f1af6f7c09082Evan Cheng 6125ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng /// StackPtr - X86 physical register used as stack ptr. 627f3394f3796883707961f2f61ea761cee15a0308Evan Cheng /// 6325ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng unsigned StackPtr; 6425ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng 6525ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng /// FramePtr - X86 physical register used as frame ptr. 667f3394f3796883707961f2f61ea761cee15a0308Evan Cheng /// 6725ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng unsigned FramePtr; 6825ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng 6925ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Chengpublic: 7025ab690a43cbbb591b76d49e3595b019c32f4b3fEvan Cheng X86RegisterInfo(X86TargetMachine &tm, const TargetInstrInfo &tii); 716811c6e1d72e55f79202b69acd15f6098967913eChris Lattner 72ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands /// getX86RegNum - Returns the native X86 register number for the given LLVM 73ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands /// register identifier. 7460783304f6385c952634c9da5f9b0c9eee8eccb8Dan Gohman unsigned getX86RegNum(unsigned RegNo) const; 75ee465749313579ccd91575ca8acf70b75c221a2cDuncan Sands 76f6372aa1cc568df19da7c5023e83c75aa9404a07Owen Anderson unsigned getStackAlignment() const { return StackAlign; } 77f6372aa1cc568df19da7c5023e83c75aa9404a07Owen Anderson 78483ec21d90295c146b5555ed66c16860bcfff942Dale Johannesen /// getDwarfRegNum - allows modification of X86GenRegisterInfo::getDwarfRegNum 79483ec21d90295c146b5555ed66c16860bcfff942Dale Johannesen /// (created by TableGen) for target dependencies. 80b97aec663b1591e71c9ddee6dbb327d1b827eda5Dale Johannesen int getDwarfRegNum(unsigned RegNum, bool isEH) const; 81483ec21d90295c146b5555ed66c16860bcfff942Dale Johannesen 82128aff4f9502a99af3573b98eb254490b3137646Chris Lattner /// Code Generation virtual methods... 83d94b6a16fec7d5021e3922b0e34f9ddb268d54b1Owen Anderson /// 84ff110265753c19daf0468ee1facf357460497b7eEvan Cheng const TargetRegisterClass * 85ff110265753c19daf0468ee1facf357460497b7eEvan Cheng getCrossCopyRegClass(const TargetRegisterClass *RC) const; 86ff110265753c19daf0468ee1facf357460497b7eEvan Cheng 87bf2c8b3c96f5c885095a10b0fcb29438f92d73c2Evan Cheng void reMaterialize(MachineBasicBlock &MBB, MachineBasicBlock::iterator MI, 88bf2c8b3c96f5c885095a10b0fcb29438f92d73c2Evan Cheng unsigned DestReg, const MachineInstr *Orig) const; 896811c6e1d72e55f79202b69acd15f6098967913eChris Lattner 90c2b861da18c54a4252fecba866341e1513fa18ccEvan Cheng /// getCalleeSavedRegs - Return a null-terminated list of all of the 910f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng /// callee-save registers on this target. 922365f51ed03afe6993bae962fdc2e5a956a64cd5Anton Korobeynikov const unsigned *getCalleeSavedRegs(const MachineFunction* MF = 0) const; 930f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng 94c2b861da18c54a4252fecba866341e1513fa18ccEvan Cheng /// getCalleeSavedRegClasses - Return a null-terminated list of the preferred 950f3ac8d8d4ce23eb2ae6f9d850f389250874eea5Evan Cheng /// register classes to spill each callee-saved register with. The order and 96c2b861da18c54a4252fecba866341e1513fa18ccEvan Cheng /// length of this list match the getCalleeSavedRegs() list. 9764d80e3387f328d21cd9cc06464b5de7861e3f27Evan Cheng const TargetRegisterClass* const* 9864d80e3387f328d21cd9cc06464b5de7861e3f27Evan Cheng getCalleeSavedRegClasses(const MachineFunction *MF = 0) const; 99b499866c05cac0e97a22c5e1f477c89096be836bAlkis Evlogimenos 100b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// getReservedRegs - Returns a bitset indexed by physical register number 101b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// indicating if a register is a special register that has particular uses and 102b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// should be considered unavailable at all times, e.g. SP, RA. This is used by 103b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng /// register scavenger to determine what registers are free. 104b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng BitVector getReservedRegs(const MachineFunction &MF) const; 105b371f457b0ea4a652a9f526ba4375c80ae542252Evan Cheng 106dc77540d9506dc151d79b94bae88bd841880ef37Evan Cheng bool hasFP(const MachineFunction &MF) const; 107dc77540d9506dc151d79b94bae88bd841880ef37Evan Cheng 1087e7bbf82719f14d71f1170f82da82269ae12d377Evan Cheng bool hasReservedCallFrame(MachineFunction &MF) const; 1097e7bbf82719f14d71f1170f82da82269ae12d377Evan Cheng 110bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner void eliminateCallFramePseudoInstr(MachineFunction &MF, 111bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner MachineBasicBlock &MBB, 112bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner MachineBasicBlock::iterator MI) const; 1132b46e8ecccfe8a6adc861158a21b67fb9e786885Misha Brukman 1145e6df4647e15c50daea9a8a4e7f4f417a266335cEvan Cheng void eliminateFrameIndex(MachineBasicBlock::iterator MI, 11597de9138217d6f76f25100df272ec1a3c4d31aadEvan Cheng int SPAdj, RegScavenger *RS = NULL) const; 116b83b28697ccabfcb6b8ddbc73fb3c4554f6d17ceMisha Brukman 117bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner void processFunctionBeforeFrameFinalized(MachineFunction &MF) const; 11803c6fafd05c067d934d15ce8f472cb09740d0133Misha Brukman 119bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner void emitPrologue(MachineFunction &MF) const; 120bb07ef97cfbe88eb5d69784acab5f36815738881Chris Lattner void emitEpilogue(MachineFunction &MF, MachineBasicBlock &MBB) const; 121f1d78e83356a412e525c30ac90dabf090a8cfc99Jim Laskey 122a99791886d5d4af2b900cd8cc1c9ed1677b6f0f4Jim Laskey // Debug information queries. 1234188699f80c233a20b6ddc61570a8a8c1804cb85Jim Laskey unsigned getRARegister() const; 124a99791886d5d4af2b900cd8cc1c9ed1677b6f0f4Jim Laskey unsigned getFrameRegister(MachineFunction &MF) const; 125b8033e821d9ccad10ba8770c4561600a3e9ce6ccEvan Cheng int getFrameIndexOffset(MachineFunction &MF, int FI) const; 1260e41094d499efa585c11904cf088016140c462d1Jim Laskey void getInitialFrameState(std::vector<MachineMove> &Moves) const; 12762819f31440fe1b1415473a89b8683b5b690d5faJim Laskey 12862819f31440fe1b1415473a89b8683b5b690d5faJim Laskey // Exception handling queries. 12962819f31440fe1b1415473a89b8683b5b690d5faJim Laskey unsigned getEHExceptionRegister() const; 13062819f31440fe1b1415473a89b8683b5b690d5faJim Laskey unsigned getEHHandlerRegister() const; 131726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner}; 132726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner 1338f7f7125e95e4fce29a4b8acbc88f708e7fae42fEvan Cheng// getX86SubSuperRegister - X86 utility function. It returns the sub or super 1348f7f7125e95e4fce29a4b8acbc88f708e7fae42fEvan Cheng// register of a specific X86 register. 1358f7f7125e95e4fce29a4b8acbc88f708e7fae42fEvan Cheng// e.g. getX86SubSuperRegister(X86::EAX, MVT::i16) return X86:AX 1368f7f7125e95e4fce29a4b8acbc88f708e7fae42fEvan Chengunsigned getX86SubSuperRegister(unsigned, MVT::ValueType, bool High=false); 1378f7f7125e95e4fce29a4b8acbc88f708e7fae42fEvan Cheng 138d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke} // End llvm namespace 139d0fde30ce850b78371fd1386338350591f9ff494Brian Gaeke 140726140821f96e3472a8eccef0c67c0b5ad65a1d9Chris Lattner#endif 141