VirtRegMap.h revision 90f95f88c6ce09c6744777dc9d140c3c77203b92
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" 216f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman#include "llvm/Target/TargetRegisterInfo.h" 224cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng#include "llvm/ADT/BitVector.h" 23c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng#include "llvm/ADT/DenseMap.h" 2494c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner#include "llvm/ADT/IndexedMap.h" 25d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng#include "llvm/ADT/SmallPtrSet.h" 26d68a07650cdb2e18f18f362ba533459aa10e01b6Dan Gohman#include "llvm/ADT/SmallVector.h" 27e81561909d128c6e2d8033cb5465a49b2596b26aBill Wendling#include "llvm/Support/Streams.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; 378c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 3849c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson class VirtRegMap : public MachineFunctionPass { 398c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner public: 402638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng enum { 412638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng NO_PHYS_REG = 0, 429193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng NO_STACK_SLOT = (1L << 30)-1, 439193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng MAX_STACK_SLOT = (1L << 18)-1 442638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng }; 452638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 4635f2705e3de4600c3621b883eed9b22e4607ddf4Chris Lattner enum ModRef { isRef = 1, isMod = 2, isModRef = 3 }; 47bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner typedef std::multimap<MachineInstr*, 48bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner std::pair<unsigned, ModRef> > MI2VirtMapTy; 498c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 508c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner private: 5190f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng MachineRegisterInfo *MRI; 5249c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson const TargetInstrInfo *TII; 53fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump const TargetRegisterInfo *TRI; 5449c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson MachineFunction *MF; 55fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump 56fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump DenseMap<const TargetRegisterClass*, BitVector> allocatableRCRegs; 57fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump 58c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// Virt2PhysMap - This is a virtual to physical register 59c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. Each virtual register is required to have an entry in 60c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// it; even spilled virtual registers (the register mapped to a 61c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// spilled register is the temporary used to load it from the 62c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// stack). 6394c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2PhysMap; 6481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 65c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// Virt2StackSlotMap - This is virtual register to stack slot 66c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. Each spilled virtual register has an entry in it 67c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// which corresponds to the stack slot this register is spilled 68c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// at. 6994c002a190cd2e3a52b1510bc997e53d63af0b3bChris Lattner IndexedMap<int, VirtReg2IndexFunctor> Virt2StackSlotMap; 7081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 7139e33acf0aba655c96d3e37703b506cbf470c483Dan Gohman /// Virt2ReMatIdMap - This is virtual register to rematerialization id 7281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. Each spilled virtual register that should be remat'd has an 7381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// entry in it which corresponds to the remat id. 74549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng IndexedMap<int, VirtReg2IndexFunctor> Virt2ReMatIdMap; 7581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 7681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// Virt2SplitMap - This is virtual register to splitted virtual register 7781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. 7881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2SplitMap; 7981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 80adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng /// Virt2SplitKillMap - This is splitted virtual register to its last use 81d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng /// (kill) index mapping. 82d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng IndexedMap<unsigned> Virt2SplitKillMap; 83adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 8481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// ReMatMap - This is virtual register to re-materialized instruction 8581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// mapping. Each virtual register whose definition is going to be 8681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// re-materialized has an entry in it. 8781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng IndexedMap<MachineInstr*, VirtReg2IndexFunctor> ReMatMap; 8881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 89c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// MI2VirtMap - This is MachineInstr to virtual register 90c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapping. In the case of memory spill code being folded into 91c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// instructions, we need to know which virtual register was 92c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// read/written by this instruction. 937f690e625807b9320bf4ae437b8f35258acc99deChris Lattner MI2VirtMapTy MI2VirtMap; 94edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 9581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// SpillPt2VirtMap - This records the virtual registers which should 9681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// be spilled right after the MachineInstr due to live interval 9781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// splitting. 98b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > > 99b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng SpillPt2VirtMap; 1002638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 1010cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// RestorePt2VirtMap - This records the virtual registers which should 1020cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// be restored right before the MachineInstr due to live interval 1030cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// splitting. 1040cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::map<MachineInstr*, std::vector<unsigned> > RestorePt2VirtMap; 1050cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 106676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// EmergencySpillMap - This records the physical registers that should 107676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// be spilled / restored around the MachineInstr since the register 108676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// allocator has run out of registers. 109676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::map<MachineInstr*, std::vector<unsigned> > EmergencySpillMap; 110676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 111676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// EmergencySpillSlots - This records emergency spill slots used to 112676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// spill physical registers when the register allocator runs out of 113676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// registers. Ideally only one stack slot is used per function per 114676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// register class. 115676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::map<const TargetRegisterClass*, int> EmergencySpillSlots; 116676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 1172638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// ReMatId - Instead of assigning a stack slot to a to be rematerialized 1189193514e2e3e599e241220b72bc9add25a80a8fdEvan Cheng /// virtual register, an unique id is being assigned. This keeps track of 1192638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// the highest id used so far. Note, this starts at (1<<18) to avoid 1202638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// conflicts with stack slot numbers. 1212638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng int ReMatId; 1222638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 123d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// LowSpillSlot, HighSpillSlot - Lowest and highest spill slot indexes. 124d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int LowSpillSlot, HighSpillSlot; 125d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 126d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// SpillSlotToUsesMap - Records uses for each register spill slot. 127d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng SmallVector<SmallPtrSet<MachineInstr*, 4>, 8> SpillSlotToUsesMap; 128d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 1294cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// ImplicitDefed - One bit for each virtual register. If set it indicates 1304cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// the register is implicitly defined. 1314cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng BitVector ImplicitDefed; 1324cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 133c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// UnusedRegs - A list of physical registers that have not been used. 134c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng BitVector UnusedRegs; 135c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 1368c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner VirtRegMap(const VirtRegMap&); // DO NOT IMPLEMENT 1378c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void operator=(const VirtRegMap&); // DO NOT IMPLEMENT 1388c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 1398c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner public: 14049c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson static char ID; 14149c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson VirtRegMap() : MachineFunctionPass(&ID), Virt2PhysMap(NO_PHYS_REG), 14249c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson Virt2StackSlotMap(NO_STACK_SLOT), 14349c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson Virt2ReMatIdMap(NO_STACK_SLOT), Virt2SplitMap(0), 14449c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson Virt2SplitKillMap(0), ReMatMap(NULL), 14549c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson ReMatId(MAX_STACK_SLOT+1), 14649c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson LowSpillSlot(NO_STACK_SLOT), HighSpillSlot(NO_STACK_SLOT) { } 14749c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson virtual bool runOnMachineFunction(MachineFunction &MF); 14849c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson 14949c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson virtual void getAnalysisUsage(AnalysisUsage &AU) const { 15049c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson AU.setPreservesAll(); 15149c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson MachineFunctionPass::getAnalysisUsage(AU); 15249c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson } 1538c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 1548c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void grow(); 1558c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 156c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns true if the specified virtual register is 157c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// mapped to a physical register 1588c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner bool hasPhys(unsigned virtReg) const { 1598c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner return getPhys(virtReg) != NO_PHYS_REG; 1608c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1618c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 162c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the physical register mapped to the specified 163c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// virtual register 1648c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner unsigned getPhys(unsigned virtReg) const { 1656f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 1667f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return Virt2PhysMap[virtReg]; 1678c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1688c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 169c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief creates a mapping for the specified virtual register to 170c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the specified physical register 1718c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void assignVirt2Phys(unsigned virtReg, unsigned physReg) { 1726f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg) && 1736f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman TargetRegisterInfo::isPhysicalRegister(physReg)); 1747f690e625807b9320bf4ae437b8f35258acc99deChris Lattner assert(Virt2PhysMap[virtReg] == NO_PHYS_REG && 1758c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "attempt to assign physical register to already mapped " 1768c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "virtual register"); 1777f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap[virtReg] = physReg; 1788c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1798c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 180c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief clears the specified virtual register's, physical 181c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// register mapping 1828c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void clearVirt(unsigned virtReg) { 1836f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 1847f690e625807b9320bf4ae437b8f35258acc99deChris Lattner assert(Virt2PhysMap[virtReg] != NO_PHYS_REG && 1858c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner "attempt to clear a not assigned virtual register"); 1867f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap[virtReg] = NO_PHYS_REG; 1878c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1888c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 189c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief clears all virtual to physical register mappings 1908c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void clearAllVirt() { 1917f690e625807b9320bf4ae437b8f35258acc99deChris Lattner Virt2PhysMap.clear(); 1928c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner grow(); 1938c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 1948c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 19590f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng /// @brief returns the register allocation preference. 19690f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng unsigned getRegAllocPref(unsigned virtReg); 19790f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng 19881a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief records virtReg is a split live interval from SReg. 19981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng void setIsSplitFromReg(unsigned virtReg, unsigned SReg) { 20081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng Virt2SplitMap[virtReg] = SReg; 20181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 20281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 20381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief returns the live interval virtReg is split from. 20481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng unsigned getPreSplitReg(unsigned virtReg) { 20581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return Virt2SplitMap[virtReg]; 20681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 20781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 20839e33acf0aba655c96d3e37703b506cbf470c483Dan Gohman /// @brief returns true if the specified virtual register is not 209549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// mapped to a stack slot or rematerialized. 210549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng bool isAssignedReg(unsigned virtReg) const { 21181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng if (getStackSlot(virtReg) == NO_STACK_SLOT && 21281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng getReMatId(virtReg) == NO_STACK_SLOT) 21381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return true; 21481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng // Split register can be assigned a physical register as well as a 21581a038218171860ee4c382849c647d3dc841fe8bEvan Cheng // stack slot or remat id. 21681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return (Virt2SplitMap[virtReg] && Virt2PhysMap[virtReg] != NO_PHYS_REG); 2178c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2188c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 219c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the stack slot mapped to the specified virtual 220c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// register 2218c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner int getStackSlot(unsigned virtReg) const { 2226f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 2237f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return Virt2StackSlotMap[virtReg]; 2248c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 2258c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 226549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// @brief returns the rematerialization id mapped to the specified virtual 227549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// register 228549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng int getReMatId(unsigned virtReg) const { 2296f0d024a534af18d9e60b3ea757376cd8a3a980eDan Gohman assert(TargetRegisterInfo::isVirtualRegister(virtReg)); 230549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng return Virt2ReMatIdMap[virtReg]; 231549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng } 232549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng 233c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief create a mapping for the specifed virtual register to 234c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the next available stack slot 2358c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner int assignVirt2StackSlot(unsigned virtReg); 236c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief create a mapping for the specified virtual register to 237c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// the specified stack slot 2388c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void assignVirt2StackSlot(unsigned virtReg, int frameIndex); 2398c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 2402638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief assign an unique re-materialization id to the specified 2412638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// virtual register. 2422638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng int assignVirtReMatId(unsigned virtReg); 243549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// @brief assign an unique re-materialization id to the specified 244549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// virtual register. 245549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng void assignVirtReMatId(unsigned virtReg, int id); 2462638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2472638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief returns true if the specified virtual register is being 2482638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// re-materialized. 2492638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng bool isReMaterialized(unsigned virtReg) const { 250549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng return ReMatMap[virtReg] != NULL; 2512638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2522638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2532638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief returns the original machine instruction being re-issued 2542638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// to re-materialize the specified virtual register. 255549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng MachineInstr *getReMaterializedMI(unsigned virtReg) const { 2562638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng return ReMatMap[virtReg]; 2572638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2582638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 2592638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// @brief records the specified virtual register will be 2602638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng /// re-materialized and the original instruction which will be re-issed 261549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// for this purpose. If parameter all is true, then all uses of the 262549f27d3070195d6647b796841a5291b4549e8e0Evan Cheng /// registers are rematerialized and it's safe to delete the definition. 2632638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng void setVirtIsReMaterialized(unsigned virtReg, MachineInstr *def) { 2642638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng ReMatMap[virtReg] = def; 2652638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng } 2662638e1a6b9e3c0e22b398987e1db99bee81db4fbEvan Cheng 267adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng /// @brief record the last use (kill) of a split virtual register. 268d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng void addKillPoint(unsigned virtReg, unsigned index) { 269d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng Virt2SplitKillMap[virtReg] = index; 270adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng } 271adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 272d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng unsigned getKillPoint(unsigned virtReg) const { 273d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng return Virt2SplitKillMap[virtReg]; 274d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng } 275d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng 276d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng /// @brief remove the last use (kill) of a split virtual register. 277adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng void removeKillPoint(unsigned virtReg) { 278d120ffd26f2715c600b028d4eac9a3c41a9f4653Evan Cheng Virt2SplitKillMap[virtReg] = 0; 279adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng } 280adf85906906ebf85c57c333e8209f37ef11a6c99Evan Cheng 281cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// @brief returns true if the specified MachineInstr is a spill point. 282cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng bool isSpillPt(MachineInstr *Pt) const { 283cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng return SpillPt2VirtMap.find(Pt) != SpillPt2VirtMap.end(); 284cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng } 285cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng 28681a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief returns the virtual registers that should be spilled due to 28781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// splitting right after the specified MachineInstr. 288b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::vector<std::pair<unsigned,bool> > &getSpillPtSpills(MachineInstr *Pt) { 28981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng return SpillPt2VirtMap[Pt]; 29081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 29181a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 29281a038218171860ee4c382849c647d3dc841fe8bEvan Cheng /// @brief records the specified MachineInstr as a spill point for virtReg. 293b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng void addSpillPoint(unsigned virtReg, bool isKill, MachineInstr *Pt) { 294c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator 295c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I = SpillPt2VirtMap.find(Pt); 296c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng if (I != SpillPt2VirtMap.end()) 297c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I->second.push_back(std::make_pair(virtReg, isKill)); 298cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng else { 299b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng std::vector<std::pair<unsigned,bool> > Virts; 300b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng Virts.push_back(std::make_pair(virtReg, isKill)); 301cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng SpillPt2VirtMap.insert(std::make_pair(Pt, Virts)); 302cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng } 30381a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 30481a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 305c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// @brief - transfer spill point information from one instruction to 306c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// another. 30781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng void transferSpillPts(MachineInstr *Old, MachineInstr *New) { 308c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator 309b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng I = SpillPt2VirtMap.find(Old); 310cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng if (I == SpillPt2VirtMap.end()) 311cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng return; 312cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng while (!I->second.empty()) { 313b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng unsigned virtReg = I->second.back().first; 314b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng bool isKill = I->second.back().second; 315cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng I->second.pop_back(); 316b50bb8cf197709b3f49044740044c06d8f314564Evan Cheng addSpillPoint(virtReg, isKill, New); 31781a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 318cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng SpillPt2VirtMap.erase(I); 31981a038218171860ee4c382849c647d3dc841fe8bEvan Cheng } 32081a038218171860ee4c382849c647d3dc841fe8bEvan Cheng 3210cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief returns true if the specified MachineInstr is a restore point. 3220cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng bool isRestorePt(MachineInstr *Pt) const { 3230cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return RestorePt2VirtMap.find(Pt) != RestorePt2VirtMap.end(); 3240cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3250cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 3260cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief returns the virtual registers that should be restoreed due to 3270cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// splitting right after the specified MachineInstr. 3280cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::vector<unsigned> &getRestorePtRestores(MachineInstr *Pt) { 3290cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return RestorePt2VirtMap[Pt]; 3300cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3310cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 3320cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng /// @brief records the specified MachineInstr as a restore point for virtReg. 3330cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng void addRestorePoint(unsigned virtReg, MachineInstr *Pt) { 334c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<unsigned> >::iterator I = 335c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng RestorePt2VirtMap.find(Pt); 336c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng if (I != RestorePt2VirtMap.end()) 337c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng I->second.push_back(virtReg); 3380cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng else { 3390cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng std::vector<unsigned> Virts; 3400cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng Virts.push_back(virtReg); 3410cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.insert(std::make_pair(Pt, Virts)); 3420cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3430cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3440cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 345676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief - transfer restore point information from one instruction to 346676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// another. 3470cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng void transferRestorePts(MachineInstr *Old, MachineInstr *New) { 348c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng std::map<MachineInstr*, std::vector<unsigned> >::iterator I = 3490cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.find(Old); 3500cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng if (I == RestorePt2VirtMap.end()) 3510cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng return; 3520cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng while (!I->second.empty()) { 3530cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng unsigned virtReg = I->second.back(); 3540cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng I->second.pop_back(); 3550cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng addRestorePoint(virtReg, New); 3560cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3570cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng RestorePt2VirtMap.erase(I); 3580cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng } 3590cbb1164b3227f25f5e5d3681800a8e50e6b9865Evan Cheng 360676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief records that the specified physical register must be spilled 361676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// around the specified machine instr. 362676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng void addEmergencySpill(unsigned PhysReg, MachineInstr *MI) { 363676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng if (EmergencySpillMap.find(MI) != EmergencySpillMap.end()) 364676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng EmergencySpillMap[MI].push_back(PhysReg); 365676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng else { 366676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::vector<unsigned> PhysRegs; 367676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng PhysRegs.push_back(PhysReg); 368676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng EmergencySpillMap.insert(std::make_pair(MI, PhysRegs)); 369676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 370676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 371676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 372676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief returns true if one or more physical registers must be spilled 373676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// around the specified instruction. 374676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng bool hasEmergencySpills(MachineInstr *MI) const { 375676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng return EmergencySpillMap.find(MI) != EmergencySpillMap.end(); 376676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 377676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 378676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief returns the physical registers to be spilled and restored around 379676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// the instruction. 380676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng std::vector<unsigned> &getEmergencySpills(MachineInstr *MI) { 381676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng return EmergencySpillMap[MI]; 382676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng } 383676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 384c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// @brief - transfer emergency spill information from one instruction to 385c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng /// another. 386c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng void transferEmergencySpills(MachineInstr *Old, MachineInstr *New) { 387c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng std::map<MachineInstr*,std::vector<unsigned> >::iterator I = 388c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng EmergencySpillMap.find(Old); 389c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng if (I == EmergencySpillMap.end()) 390c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng return; 391c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng while (!I->second.empty()) { 392c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng unsigned virtReg = I->second.back(); 393c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng I->second.pop_back(); 394c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng addEmergencySpill(virtReg, New); 395c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng } 396c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng EmergencySpillMap.erase(I); 397c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng } 398c1f53c742620dd4f2460685477303002bba8a8d8Evan Cheng 399676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng /// @brief return or get a emergency spill slot for the register class. 400676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng int getEmergencySpillSlot(const TargetRegisterClass *RC); 401676dd7c80b6f91178452535ac45ca58feb23cc42Evan Cheng 402d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Return lowest spill slot index. 403d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int getLowSpillSlot() const { 404d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return LowSpillSlot; 405d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 406d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 407d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Return highest spill slot index. 408d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng int getHighSpillSlot() const { 409d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return HighSpillSlot; 410d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 411d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 412d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Records a spill slot use. 413d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng void addSpillSlotUse(int FrameIndex, MachineInstr *MI); 414d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 415d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng /// @brief Returns true if spill slot has been used. 416d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng bool isSpillSlotUsed(int FrameIndex) const { 417d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng assert(FrameIndex >= 0 && "Spill slot index should not be negative!"); 418d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng return !SpillSlotToUsesMap[FrameIndex-LowSpillSlot].empty(); 419d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng } 420d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng 4214cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// @brief Mark the specified register as being implicitly defined. 4224cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng void setIsImplicitlyDefined(unsigned VirtReg) { 4234cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng ImplicitDefed.set(VirtReg-TargetRegisterInfo::FirstVirtualRegister); 4244cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng } 4254cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 4264cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng /// @brief Returns true if the virtual register is implicitly defined. 4274cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng bool isImplicitlyDefined(unsigned VirtReg) const { 4284cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng return ImplicitDefed[VirtReg-TargetRegisterInfo::FirstVirtualRegister]; 4294cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng } 4304cce6b4c7882ef0cc993d931b90bf33985c96110Evan Cheng 431bec6a9ea1281a0b3b37aece91ab0df21e086af61Chris Lattner /// @brief Updates information about the specified virtual register's value 432aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng /// folded into newMI machine instruction. 433aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng void virtFolded(unsigned VirtReg, MachineInstr *OldMI, MachineInstr *NewMI, 434aee4af68ae2016afc5b4ec0c430e539c5810a766Evan Cheng ModRef MRInfo); 4358c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 4367f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng /// @brief Updates information about the specified virtual register's value 4377f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng /// folded into the specified machine instruction. 4387f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng void virtFolded(unsigned VirtReg, MachineInstr *MI, ModRef MRInfo); 4397f56625447b94178118f2fec732b10f9e4aa7fbfEvan Cheng 440c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// @brief returns the virtual registers' values folded in memory 441c736b3a37aa8959f9011bf0773288ba35c3f08b3Alkis Evlogimenos /// operands of this instruction 4427f690e625807b9320bf4ae437b8f35258acc99deChris Lattner std::pair<MI2VirtMapTy::const_iterator, MI2VirtMapTy::const_iterator> 4438c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner getFoldedVirts(MachineInstr* MI) const { 4447f690e625807b9320bf4ae437b8f35258acc99deChris Lattner return MI2VirtMap.equal_range(MI); 4458c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 44635f2705e3de4600c3621b883eed9b22e4607ddf4Chris Lattner 447cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// RemoveMachineInstrFromMaps - MI is being erased, remove it from the 448cada245d06959831b90f8c29f92e77beda4b71cbEvan Cheng /// the folded instruction map and spill point map. 449d36531249a9a9500e516148e7e72d4c0a7a4d0eeEvan Cheng void RemoveMachineInstrFromMaps(MachineInstr *MI); 4508c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 451c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// FindUnusedRegisters - Gather a list of allocatable registers that 452c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// have not been allocated to any virtual register. 45390f95f88c6ce09c6744777dc9d140c3c77203b92Evan Cheng bool FindUnusedRegisters(LiveIntervals* LIs); 454c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 455c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// HasUnusedRegisters - Return true if there are any allocatable registers 456c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// that have not been allocated to any virtual register. 457c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng bool HasUnusedRegisters() const { 458c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return !UnusedRegs.none(); 459c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 460c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 461c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// setRegisterUsed - Remember the physical register is now used. 462c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng void setRegisterUsed(unsigned Reg) { 463c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng UnusedRegs.reset(Reg); 464c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 465c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 466c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// isRegisterUnused - Return true if the physical register has not been 467c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// used. 468c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng bool isRegisterUnused(unsigned Reg) const { 469c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return UnusedRegs[Reg]; 470c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 471c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 472c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// getFirstUnusedRegister - Return the first physical register that has not 473c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng /// been used. 474c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng unsigned getFirstUnusedRegister(const TargetRegisterClass *RC) { 475c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng int Reg = UnusedRegs.find_first(); 476c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng while (Reg != -1) { 477fe095f39e7009c51d1c86769792ccbcad8cdd2ecMike Stump if (allocatableRCRegs[RC][Reg]) 478c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return (unsigned)Reg; 479c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng Reg = UnusedRegs.find_next(Reg); 480c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 481c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng return 0; 482c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng } 483c781a243a3d17e7e763515794168d8fa6043f565Evan Cheng 48449c8aa0d8b2824c70d178c5d55cda64d6613c0d8Owen Anderson void print(std::ostream &OS, const Module* M = 0) const; 4855c7e326585f3a543388ba871c3425f7664cd9143Bill Wendling void print(std::ostream *OS) const { if (OS) print(*OS); } 4868c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner void dump() const; 4878c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner }; 4888c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner 4895c7e326585f3a543388ba871c3425f7664cd9143Bill Wendling inline std::ostream *operator<<(std::ostream *OS, const VirtRegMap &VRM) { 4905c7e326585f3a543388ba871c3425f7664cd9143Bill Wendling VRM.print(OS); 4915c7e326585f3a543388ba871c3425f7664cd9143Bill Wendling return OS; 4925c7e326585f3a543388ba871c3425f7664cd9143Bill Wendling } 4938c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner inline std::ostream &operator<<(std::ostream &OS, const VirtRegMap &VRM) { 4948c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner VRM.print(OS); 4958c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner return OS; 4968c4d88d3697835371ecf6823f4142af13603ad2dChris Lattner } 49734d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos} // End llvm namespace 49834d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos 49934d9bc9f168d17c52eb57e024580bd9499695f91Alkis Evlogimenos#endif 500