VirtRegMap.h revision c9672cb8bea13fcbcbdb1cf26708d831c034c089
134d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos//===-- llvm/CodeGen/VirtRegMap.h - Virtual Register Map -*- C++ -*--------===// 234d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// 334d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// The LLVM Compiler Infrastructure 434d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// 54ee451de366474b9c228b4e5fa573795a715216dChris Lattner// This file is distributed under the University of Illinois Open Source 64ee451de366474b9c228b4e5fa573795a715216dChris Lattner// License. See LICENSE.TXT for details. 734d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// 834d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos//===----------------------------------------------------------------------===// 934d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// 108c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner// This file implements a virtual register map. This maps virtual registers to 118c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner// physical registers and virtual registers to stack slots. It is created and 128c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner// updated by a register allocator and then used by a machine code rewriter that 138c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner// adds spill code and rewrites virtual into physical register references. 1434d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos// 1534d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos//===----------------------------------------------------------------------===// 1634d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos 1734d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos#ifndef LLVM_CODEGEN_VIRTREGMAP_H 1834d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos#define LLVM_CODEGEN_VIRTREGMAP_H 1934d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos 2049c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson#include "llvm/CodeGen/MachineFunctionPass.h" 218651125d2885f74546b6e2a556082111d5b75da3Lang Hames#include "llvm/CodeGen/LiveInterval.h" 226f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman#include "llvm/Target/TargetRegisterInfo.h" 234cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng#include "llvm/ADT/BitVector.h" 24c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng#include "llvm/ADT/DenseMap.h" 2594c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner#include "llvm/ADT/IndexedMap.h" 26d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng#include "llvm/ADT/SmallPtrSet.h" 27d68a07650cdb2e18f18f362ba533459aa10e01b6Dan Gohman#include "llvm/ADT/SmallVector.h" 285f37502bfbadfa65de087627bd67fd58bb03725cAlkis Evlogimenos#include <map> 2934d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos 3034d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenosnamespace llvm { 31c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng class LiveIntervals; 328c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner class MachineInstr; 337e23146ab9dd6c2d8849bacce841a2e4660305dcDavid Greene class MachineFunction; 3490f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng class MachineRegisterInfo; 352926869b4a083fc951484de03a9867eabf81e880Chris Lattner class TargetInstrInfo; 36fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump class TargetRegisterInfo; 371cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar class raw_ostream; 388c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 3949c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson class VirtRegMap : public MachineFunctionPass { 408c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner public: 412638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng enum { 422638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng NO_PHYS_REG = 0, 439193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng NO_STACK_SLOT = (1L << 30)-1, 449193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng MAX_STACK_SLOT = (1L << 18)-1 452638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng }; 462638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 4735f2705e3de4600c3621b883eed9b22e4607ddf4Chris Lattner enum ModRef { isRef = 1, isMod = 2, isModRef = 3 }; 48bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner typedef std::multimap<MachineInstr*, 49bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner std::pair<unsigned, ModRef> > MI2VirtMapTy; 508c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 518c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner private: 5290f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng MachineRegisterInfo *MRI; 5349c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson const TargetInstrInfo *TII; 54fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump const TargetRegisterInfo *TRI; 5549c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson MachineFunction *MF; 56fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump 57fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump DenseMap<const TargetRegisterClass*, BitVector> allocatableRCRegs; 58fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump 59c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// Virt2PhysMap - This is a virtual to physical register 60c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. Each virtual register is required to have an entry in 61c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// it; even spilled virtual registers (the register mapped to a 62c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// spilled register is the temporary used to load it from the 63c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// stack). 6494c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2PhysMap; 6581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 66c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// Virt2StackSlotMap - This is virtual register to stack slot 67c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. Each spilled virtual register has an entry in it 68c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// which corresponds to the stack slot this register is spilled 69c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// at. 7094c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner IndexedMap<int, VirtReg2IndexFunctor> Virt2StackSlotMap; 7181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 7239e33acf0aba655c96d3e37703b506cbf470c483Dan Gohman /// Virt2ReMatIdMap - This is virtual register to rematerialization id 7381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. Each spilled virtual register that should be remat'd has an 7481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// entry in it which corresponds to the remat id. 75549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng IndexedMap<int, VirtReg2IndexFunctor> Virt2ReMatIdMap; 7681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 7781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// Virt2SplitMap - This is virtual register to splitted virtual register 7881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. 7981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2SplitMap; 8081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 81adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng /// Virt2SplitKillMap - This is splitted virtual register to its last use 82d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng /// (kill) index mapping. 83233a60ec40b41027ff429e2f2c27fa2be762f2e9Lang Hames IndexedMap<SlotIndex> Virt2SplitKillMap; 84adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 8581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// ReMatMap - This is virtual register to re-materialized instruction 8681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. Each virtual register whose definition is going to be 8781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// re-materialized has an entry in it. 8881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng IndexedMap<MachineInstr*, VirtReg2IndexFunctor> ReMatMap; 8981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 90c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// MI2VirtMap - This is MachineInstr to virtual register 91c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. In the case of memory spill code being folded into 92c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// instructions, we need to know which virtual register was 93c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// read/written by this instruction. 947f690e625807b9320bf4ae437b8f35258acc99deChris Lattner MI2VirtMapTy MI2VirtMap; 95edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 9681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// SpillPt2VirtMap - This records the virtual registers which should 9781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// be spilled right after the MachineInstr due to live interval 9881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// splitting. 99b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > > 100b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng SpillPt2VirtMap; 1012638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 1020cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// RestorePt2VirtMap - This records the virtual registers which should 1030cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// be restored right before the MachineInstr due to live interval 1040cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// splitting. 1050cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::map<MachineInstr*, std::vector<unsigned> > RestorePt2VirtMap; 1060cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 107676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// EmergencySpillMap - This records the physical registers that should 108676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// be spilled / restored around the MachineInstr since the register 109676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// allocator has run out of registers. 110676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::map<MachineInstr*, std::vector<unsigned> > EmergencySpillMap; 111676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 112676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// EmergencySpillSlots - This records emergency spill slots used to 113676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// spill physical registers when the register allocator runs out of 114676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// registers. Ideally only one stack slot is used per function per 115676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// register class. 116676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::map<const TargetRegisterClass*, int> EmergencySpillSlots; 117676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 1182638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// ReMatId - Instead of assigning a stack slot to a to be rematerialized 1199193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng /// virtual register, an unique id is being assigned. This keeps track of 1202638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// the highest id used so far. Note, this starts at (1<<18) to avoid 1212638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// conflicts with stack slot numbers. 1222638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng int ReMatId; 1232638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 124d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// LowSpillSlot, HighSpillSlot - Lowest and highest spill slot indexes. 125d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int LowSpillSlot, HighSpillSlot; 126d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 127d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// SpillSlotToUsesMap - Records uses for each register spill slot. 128d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng SmallVector<SmallPtrSet<MachineInstr*, 4>, 8> SpillSlotToUsesMap; 129d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 1304cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// ImplicitDefed - One bit for each virtual register. If set it indicates 1314cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// the register is implicitly defined. 1324cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng BitVector ImplicitDefed; 1334cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 134c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// UnusedRegs - A list of physical registers that have not been used. 135c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng BitVector UnusedRegs; 136c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 137b55e91e08738b804f17109a49881e51b69e91299Jakob Stoklund Olesen /// createSpillSlot - Allocate a spill slot for RC from MFI. 138b55e91e08738b804f17109a49881e51b69e91299Jakob Stoklund Olesen unsigned createSpillSlot(const TargetRegisterClass *RC); 139b55e91e08738b804f17109a49881e51b69e91299Jakob Stoklund Olesen 1408c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner VirtRegMap(const VirtRegMap&); // DO NOT IMPLEMENT 1418c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void operator=(const VirtRegMap&); // DO NOT IMPLEMENT 1428c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 1438c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner public: 14449c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson static char ID; 14590c579de5a383cee278acc3f7e7b9d0a656e6a35Owen Anderson VirtRegMap() : MachineFunctionPass(ID), Virt2PhysMap(NO_PHYS_REG), 14649c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson Virt2StackSlotMap(NO_STACK_SLOT), 14749c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson Virt2ReMatIdMap(NO_STACK_SLOT), Virt2SplitMap(0), 148233a60ec40b41027ff429e2f2c27fa2be762f2e9Lang Hames Virt2SplitKillMap(SlotIndex()), ReMatMap(NULL), 14949c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson ReMatId(MAX_STACK_SLOT+1), 15049c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson LowSpillSlot(NO_STACK_SLOT), HighSpillSlot(NO_STACK_SLOT) { } 15149c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson virtual bool runOnMachineFunction(MachineFunction &MF); 15249c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson 15349c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson virtual void getAnalysisUsage(AnalysisUsage &AU) const { 15449c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson AU.setPreservesAll(); 15549c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson MachineFunctionPass::getAnalysisUsage(AU); 15649c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson } 1578c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 158f0179004e94259a8adab6c48f295ea9ab18af4c3Jakob Stoklund Olesen MachineFunction &getMachineFunction() const { 159c9672cb8bea13fcbcbdb1cf26708d831c034c089Jakob Stoklund Olesen assert(MF && "getMachineFunction called before runOnMachineFunction"); 160f0179004e94259a8adab6c48f295ea9ab18af4c3Jakob Stoklund Olesen return *MF; 161f0179004e94259a8adab6c48f295ea9ab18af4c3Jakob Stoklund Olesen } 162f0179004e94259a8adab6c48f295ea9ab18af4c3Jakob Stoklund Olesen 163c9672cb8bea13fcbcbdb1cf26708d831c034c089Jakob Stoklund Olesen MachineRegisterInfo &getRegInfo() const { return *MRI; } 164c9672cb8bea13fcbcbdb1cf26708d831c034c089Jakob Stoklund Olesen const TargetRegisterInfo &getTargetRegInfo() const { return *TRI; } 165c9672cb8bea13fcbcbdb1cf26708d831c034c089Jakob Stoklund Olesen 1668c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void grow(); 1678c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 168c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns true if the specified virtual register is 169c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapped to a physical register 1708c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner bool hasPhys(unsigned virtReg) const { 1718c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner return getPhys(virtReg) != NO_PHYS_REG; 1728c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1738c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 174c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the physical register mapped to the specified 175c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// virtual register 1768c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner unsigned getPhys(unsigned virtReg) const { 1776f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 1787f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return Virt2PhysMap[virtReg]; 1798c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1808c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 181c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief creates a mapping for the specified virtual register to 182c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the specified physical register 1838c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void assignVirt2Phys(unsigned virtReg, unsigned physReg) { 1846f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg) && 1856f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman TargetRegisterInfo::isPhysicalRegister(physReg)); 1867f690e625807b9320bf4ae437b8f35258acc99deChris Lattner assert(Virt2PhysMap[virtReg] == NO_PHYS_REG && 1878c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "attempt to assign physical register to already mapped " 1888c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "virtual register"); 1897f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap[virtReg] = physReg; 1908c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1918c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 192c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief clears the specified virtual register's, physical 193c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// register mapping 1948c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void clearVirt(unsigned virtReg) { 1956f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 1967f690e625807b9320bf4ae437b8f35258acc99deChris Lattner assert(Virt2PhysMap[virtReg] != NO_PHYS_REG && 1978c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "attempt to clear a not assigned virtual register"); 1987f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap[virtReg] = NO_PHYS_REG; 1998c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2008c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 201c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief clears all virtual to physical register mappings 2028c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void clearAllVirt() { 2037f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap.clear(); 2048c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner grow(); 2058c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2068c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 20790f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng /// @brief returns the register allocation preference. 20890f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng unsigned getRegAllocPref(unsigned virtReg); 20990f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng 21081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief records virtReg is a split live interval from SReg. 21181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng void setIsSplitFromReg(unsigned virtReg, unsigned SReg) { 21281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng Virt2SplitMap[virtReg] = SReg; 21381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 21481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 21581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief returns the live interval virtReg is split from. 21681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng unsigned getPreSplitReg(unsigned virtReg) { 21781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return Virt2SplitMap[virtReg]; 21881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 21981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 22039e33acf0aba655c96d3e37703b506cbf470c483Dan Gohman /// @brief returns true if the specified virtual register is not 221549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// mapped to a stack slot or rematerialized. 222549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng bool isAssignedReg(unsigned virtReg) const { 22381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng if (getStackSlot(virtReg) == NO_STACK_SLOT && 22481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng getReMatId(virtReg) == NO_STACK_SLOT) 22581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return true; 22681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng // Split register can be assigned a physical register as well as a 22781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng // stack slot or remat id. 22881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return (Virt2SplitMap[virtReg] && Virt2PhysMap[virtReg] != NO_PHYS_REG); 2298c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2308c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 231c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the stack slot mapped to the specified virtual 232c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// register 2338c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner int getStackSlot(unsigned virtReg) const { 2346f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 2357f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return Virt2StackSlotMap[virtReg]; 2368c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2378c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 238549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// @brief returns the rematerialization id mapped to the specified virtual 239549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// register 240549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng int getReMatId(unsigned virtReg) const { 2416f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 242549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng return Virt2ReMatIdMap[virtReg]; 243549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng } 244549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng 245c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief create a mapping for the specifed virtual register to 246c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the next available stack slot 2478c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner int assignVirt2StackSlot(unsigned virtReg); 248c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief create a mapping for the specified virtual register to 249c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the specified stack slot 2508c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void assignVirt2StackSlot(unsigned virtReg, int frameIndex); 2518c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 2522638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief assign an unique re-materialization id to the specified 2532638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// virtual register. 2542638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng int assignVirtReMatId(unsigned virtReg); 255549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// @brief assign an unique re-materialization id to the specified 256549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// virtual register. 257549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng void assignVirtReMatId(unsigned virtReg, int id); 2582638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2592638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief returns true if the specified virtual register is being 2602638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// re-materialized. 2612638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng bool isReMaterialized(unsigned virtReg) const { 262549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng return ReMatMap[virtReg] != NULL; 2632638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2642638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2652638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief returns the original machine instruction being re-issued 2662638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// to re-materialize the specified virtual register. 267549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng MachineInstr *getReMaterializedMI(unsigned virtReg) const { 2682638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng return ReMatMap[virtReg]; 2692638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2702638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2712638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief records the specified virtual register will be 2722638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// re-materialized and the original instruction which will be re-issed 273549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// for this purpose. If parameter all is true, then all uses of the 274549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// registers are rematerialized and it's safe to delete the definition. 2752638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng void setVirtIsReMaterialized(unsigned virtReg, MachineInstr *def) { 2762638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng ReMatMap[virtReg] = def; 2772638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2782638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 279adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng /// @brief record the last use (kill) of a split virtual register. 280233a60ec40b41027ff429e2f2c27fa2be762f2e9Lang Hames void addKillPoint(unsigned virtReg, SlotIndex index) { 281d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng Virt2SplitKillMap[virtReg] = index; 282adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng } 283adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 284233a60ec40b41027ff429e2f2c27fa2be762f2e9Lang Hames SlotIndex getKillPoint(unsigned virtReg) const { 285d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng return Virt2SplitKillMap[virtReg]; 286d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng } 287d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng 288d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng /// @brief remove the last use (kill) of a split virtual register. 289adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng void removeKillPoint(unsigned virtReg) { 290233a60ec40b41027ff429e2f2c27fa2be762f2e9Lang Hames Virt2SplitKillMap[virtReg] = SlotIndex(); 291adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng } 292adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 293cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// @brief returns true if the specified MachineInstr is a spill point. 294cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng bool isSpillPt(MachineInstr *Pt) const { 295cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng return SpillPt2VirtMap.find(Pt) != SpillPt2VirtMap.end(); 296cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng } 297cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng 29881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief returns the virtual registers that should be spilled due to 29981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// splitting right after the specified MachineInstr. 300b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::vector<std::pair<unsigned,bool> > &getSpillPtSpills(MachineInstr *Pt) { 30181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return SpillPt2VirtMap[Pt]; 30281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 30381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 30481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief records the specified MachineInstr as a spill point for virtReg. 305b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng void addSpillPoint(unsigned virtReg, bool isKill, MachineInstr *Pt) { 306c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator 307c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I = SpillPt2VirtMap.find(Pt); 308c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng if (I != SpillPt2VirtMap.end()) 309c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I->second.push_back(std::make_pair(virtReg, isKill)); 310cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng else { 311b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::vector<std::pair<unsigned,bool> > Virts; 312b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng Virts.push_back(std::make_pair(virtReg, isKill)); 313cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng SpillPt2VirtMap.insert(std::make_pair(Pt, Virts)); 314cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng } 31581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 31681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 317c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// @brief - transfer spill point information from one instruction to 318c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// another. 31981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng void transferSpillPts(MachineInstr *Old, MachineInstr *New) { 320c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator 321b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng I = SpillPt2VirtMap.find(Old); 322cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng if (I == SpillPt2VirtMap.end()) 323cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng return; 324cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng while (!I->second.empty()) { 325b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng unsigned virtReg = I->second.back().first; 326b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng bool isKill = I->second.back().second; 327cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng I->second.pop_back(); 328b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng addSpillPoint(virtReg, isKill, New); 32981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 330cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng SpillPt2VirtMap.erase(I); 33181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 33281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 3330cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief returns true if the specified MachineInstr is a restore point. 3340cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng bool isRestorePt(MachineInstr *Pt) const { 3350cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return RestorePt2VirtMap.find(Pt) != RestorePt2VirtMap.end(); 3360cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3370cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 3380cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief returns the virtual registers that should be restoreed due to 3390cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// splitting right after the specified MachineInstr. 3400cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::vector<unsigned> &getRestorePtRestores(MachineInstr *Pt) { 3410cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return RestorePt2VirtMap[Pt]; 3420cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3430cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 3440cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief records the specified MachineInstr as a restore point for virtReg. 3450cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng void addRestorePoint(unsigned virtReg, MachineInstr *Pt) { 346c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<unsigned> >::iterator I = 347c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng RestorePt2VirtMap.find(Pt); 348c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng if (I != RestorePt2VirtMap.end()) 349c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I->second.push_back(virtReg); 3500cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng else { 3510cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::vector<unsigned> Virts; 3520cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng Virts.push_back(virtReg); 3530cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.insert(std::make_pair(Pt, Virts)); 3540cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3550cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3560cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 357676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief - transfer restore point information from one instruction to 358676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// another. 3590cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng void transferRestorePts(MachineInstr *Old, MachineInstr *New) { 360c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<unsigned> >::iterator I = 3610cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.find(Old); 3620cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng if (I == RestorePt2VirtMap.end()) 3630cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return; 3640cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng while (!I->second.empty()) { 3650cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng unsigned virtReg = I->second.back(); 3660cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng I->second.pop_back(); 3670cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng addRestorePoint(virtReg, New); 3680cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3690cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.erase(I); 3700cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3710cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 372676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief records that the specified physical register must be spilled 373676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// around the specified machine instr. 374676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng void addEmergencySpill(unsigned PhysReg, MachineInstr *MI) { 375676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng if (EmergencySpillMap.find(MI) != EmergencySpillMap.end()) 376676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng EmergencySpillMap[MI].push_back(PhysReg); 377676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng else { 378676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::vector<unsigned> PhysRegs; 379676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng PhysRegs.push_back(PhysReg); 380676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng EmergencySpillMap.insert(std::make_pair(MI, PhysRegs)); 381676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 382676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 383676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 384676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief returns true if one or more physical registers must be spilled 385676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// around the specified instruction. 386676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng bool hasEmergencySpills(MachineInstr *MI) const { 387676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng return EmergencySpillMap.find(MI) != EmergencySpillMap.end(); 388676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 389676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 390676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief returns the physical registers to be spilled and restored around 391676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// the instruction. 392676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::vector<unsigned> &getEmergencySpills(MachineInstr *MI) { 393676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng return EmergencySpillMap[MI]; 394676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 395676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 396c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// @brief - transfer emergency spill information from one instruction to 397c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// another. 398c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng void transferEmergencySpills(MachineInstr *Old, MachineInstr *New) { 399c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng std::map<MachineInstr*,std::vector<unsigned> >::iterator I = 400c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng EmergencySpillMap.find(Old); 401c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng if (I == EmergencySpillMap.end()) 402c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng return; 403c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng while (!I->second.empty()) { 404c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng unsigned virtReg = I->second.back(); 405c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng I->second.pop_back(); 406c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng addEmergencySpill(virtReg, New); 407c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng } 408c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng EmergencySpillMap.erase(I); 409c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng } 410c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng 411676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief return or get a emergency spill slot for the register class. 412676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng int getEmergencySpillSlot(const TargetRegisterClass *RC); 413676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 414d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Return lowest spill slot index. 415d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int getLowSpillSlot() const { 416d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return LowSpillSlot; 417d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 418d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 419d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Return highest spill slot index. 420d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int getHighSpillSlot() const { 421d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return HighSpillSlot; 422d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 423d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 424d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Records a spill slot use. 425d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng void addSpillSlotUse(int FrameIndex, MachineInstr *MI); 426d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 427d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Returns true if spill slot has been used. 428d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng bool isSpillSlotUsed(int FrameIndex) const { 429d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng assert(FrameIndex >= 0 && "Spill slot index should not be negative!"); 430d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return !SpillSlotToUsesMap[FrameIndex-LowSpillSlot].empty(); 431d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 432d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 4334cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// @brief Mark the specified register as being implicitly defined. 4344cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng void setIsImplicitlyDefined(unsigned VirtReg) { 4354cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng ImplicitDefed.set(VirtReg-TargetRegisterInfo::FirstVirtualRegister); 4364cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng } 4374cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 4384cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// @brief Returns true if the virtual register is implicitly defined. 4394cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng bool isImplicitlyDefined(unsigned VirtReg) const { 4404cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng return ImplicitDefed[VirtReg-TargetRegisterInfo::FirstVirtualRegister]; 4414cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng } 4424cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 443bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner /// @brief Updates information about the specified virtual register's value 444aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng /// folded into newMI machine instruction. 445aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng void virtFolded(unsigned VirtReg, MachineInstr *OldMI, MachineInstr *NewMI, 446aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng ModRef MRInfo); 4478c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 4487f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng /// @brief Updates information about the specified virtual register's value 4497f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng /// folded into the specified machine instruction. 4507f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng void virtFolded(unsigned VirtReg, MachineInstr *MI, ModRef MRInfo); 4517f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng 452c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the virtual registers' values folded in memory 453c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// operands of this instruction 4547f690e625807b9320bf4ae437b8f35258acc99deChris Lattner std::pair<MI2VirtMapTy::const_iterator, MI2VirtMapTy::const_iterator> 4558c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner getFoldedVirts(MachineInstr* MI) const { 4567f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return MI2VirtMap.equal_range(MI); 4578c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 45835f2705e3de4600c3621b883eed9b22e4607ddf4Chris Lattner 459cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// RemoveMachineInstrFromMaps - MI is being erased, remove it from the 460cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// the folded instruction map and spill point map. 461d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng void RemoveMachineInstrFromMaps(MachineInstr *MI); 4628c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 463c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// FindUnusedRegisters - Gather a list of allocatable registers that 464c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// have not been allocated to any virtual register. 46590f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng bool FindUnusedRegisters(LiveIntervals* LIs); 466c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 467c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// HasUnusedRegisters - Return true if there are any allocatable registers 468c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// that have not been allocated to any virtual register. 469c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng bool HasUnusedRegisters() const { 470c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return !UnusedRegs.none(); 471c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 472c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 473c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// setRegisterUsed - Remember the physical register is now used. 474c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng void setRegisterUsed(unsigned Reg) { 475c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng UnusedRegs.reset(Reg); 476c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 477c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 478c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// isRegisterUnused - Return true if the physical register has not been 479c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// used. 480c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng bool isRegisterUnused(unsigned Reg) const { 481c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return UnusedRegs[Reg]; 482c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 483c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 484c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// getFirstUnusedRegister - Return the first physical register that has not 485c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// been used. 486c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng unsigned getFirstUnusedRegister(const TargetRegisterClass *RC) { 487c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng int Reg = UnusedRegs.find_first(); 488c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng while (Reg != -1) { 489fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump if (allocatableRCRegs[RC][Reg]) 490c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return (unsigned)Reg; 491c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng Reg = UnusedRegs.find_next(Reg); 492c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 493c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return 0; 494c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 495c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 4961cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar void print(raw_ostream &OS, const Module* M = 0) const; 4978c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void dump() const; 4988c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner }; 4998c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 5001cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar inline raw_ostream &operator<<(raw_ostream &OS, const VirtRegMap &VRM) { 5011cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar VRM.print(OS); 5021cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar return OS; 5031cd1d98232c3c3a0bd3810c3bf6c2572ea02f208Daniel Dunbar } 50434d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos} // End llvm namespace 50534d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos 50634d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos#endif 507