LiveDebugVariables.cpp revision 6212f9a304d7f8061c87920d39bddbc19afecb0c
1bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen//===- LiveDebugVariables.cpp - Tracking debug info variables -------------===// 2bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 3bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// The LLVM Compiler Infrastructure 4bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 5bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// This file is distributed under the University of Illinois Open Source 6bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// License. See LICENSE.TXT for details. 7bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 8bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 9bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 10bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// This file implements the LiveDebugVariables analysis. 11bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 12bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// Remove all DBG_VALUE instructions referencing virtual registers and replace 13bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// them with a data structure tracking where live user variables are kept - in a 14bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// virtual register or in a stack slot. 15bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 16bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// Allow the data structure to be updated during register allocation when values 17bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// are moved between registers and stack slots. Finally emit new DBG_VALUE 18bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// instructions after register allocation is complete. 19bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen// 20bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 21bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#define DEBUG_TYPE "livedebug" 23bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "LiveDebugVariables.h" 2442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "VirtRegMap.h" 250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Constants.h" 260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Metadata.h" 270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Value.h" 280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/ADT/IntervalMap.h" 29bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/LiveIntervalAnalysis.h" 300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/CodeGen/MachineDominators.h" 3142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineFunction.h" 3242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineInstrBuilder.h" 331744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen#include "llvm/CodeGen/MachineRegisterInfo.h" 34bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/Passes.h" 350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/CommandLine.h" 360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/Debug.h" 3742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/Target/TargetInstrInfo.h" 38bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/Target/TargetMachine.h" 390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Target/TargetRegisterInfo.h" 40bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 41bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenusing namespace llvm; 42bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 4351a666f0e50a34b74212db9c5814153c885153a5Devang Patelstatic cl::opt<bool> 4425dc2268a5aedcb5da57f065dbdb40d790b11bc0Jakob Stoklund OlesenEnableLDV("live-debug-variables", cl::init(true), 4551a666f0e50a34b74212db9c5814153c885153a5Devang Patel cl::desc("Enable the live debug variables pass"), cl::Hidden); 4651a666f0e50a34b74212db9c5814153c885153a5Devang Patel 47bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenchar LiveDebugVariables::ID = 0; 48bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 49bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_BEGIN(LiveDebugVariables, "livedebugvars", 50bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 510613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(MachineDominatorTree) 52bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(LiveIntervals) 53bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_END(LiveDebugVariables, "livedebugvars", 54bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 55bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 56bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenvoid LiveDebugVariables::getAnalysisUsage(AnalysisUsage &AU) const { 570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen AU.addRequired<MachineDominatorTree>(); 58bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.addRequiredTransitive<LiveIntervals>(); 59bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.setPreservesAll(); 60bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen MachineFunctionPass::getAnalysisUsage(AU); 61bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 62bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 630613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenLiveDebugVariables::LiveDebugVariables() : MachineFunctionPass(ID), pImpl(0) { 64bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen initializeLiveDebugVariablesPass(*PassRegistry::getPassRegistry()); 65bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 66bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LocMap - Map of where a user value is live, and its location. 680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesentypedef IntervalMap<SlotIndex, unsigned, 4> LocMap; 690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValue - A user value is a part of a debug info user variable. 710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// A DBG_VALUE instruction notes that (a sub-register of) a virtual register 730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// holds part of a user variable. The part is identified by a byte offset. 740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValues are grouped into equivalence classes for easier searching. Two 760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// user values are related if they refer to the same variable, or if they are 770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// held by the same virtual register. The equivalence class is the transitive 780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// closure of that relation. 790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 801744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenclass LDVImpl; 810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass UserValue { 820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const MDNode *variable; ///< The debug info variable we are part of. 830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned offset; ///< Byte offset into variable. 84f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc dl; ///< The debug location for the variable. This is 85f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel ///< used by dwarf writer to find lexical scope. 860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *leader; ///< Equivalence class leader. 870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *next; ///< Next value in equivalence class, or null. 880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Numbered locations referenced by locmap. 900804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen SmallVector<MachineOperand, 4> locations; 910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map of slot indices where this value is live. 930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap locInts; 940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 955daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// coalesceLocation - After LocNo was changed, check if it has become 965daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// identical to another location, and coalesce them. This may cause LocNo or 975daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// a later location to be erased, but no earlier location will be erased. 985daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen void coalesceLocation(unsigned LocNo); 995daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 10042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// insertDebugValue - Insert a DBG_VALUE into MBB at Idx for LocNo. 10142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, unsigned LocNo, 10242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TII); 10342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 104f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitLocation - Replace OldLocNo ranges with NewRegs ranges where NewRegs 105f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// is live. Returns true if any changes were made. 106f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool splitLocation(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs); 107f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 1080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 1090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// UserValue - Create a new UserValue. 110f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen UserValue(const MDNode *var, unsigned o, DebugLoc L, 111f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel LocMap::Allocator &alloc) 112f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel : variable(var), offset(o), dl(L), leader(this), next(0), locInts(alloc) 1130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen {} 1140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLeader - Get the leader of this value's equivalence class. 1160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getLeader() { 1170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *l = leader; 1180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (l != l->leader) 1190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen l = l->leader; 1200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return leader = l; 1210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getNext - Return the next UserValue in the equivalence class. 1240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getNext() const { return next; } 1250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// match - Does this UserValue match the aprameters? 1270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool match(const MDNode *Var, unsigned Offset) const { 1280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Var == variable && Offset == offset; 1290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// merge - Merge equivalence classes. 1320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static UserValue *merge(UserValue *L1, UserValue *L2) { 1330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L2 = L2->getLeader(); 1340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!L1) 1350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L2; 1360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1 = L1->getLeader(); 1370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (L1 == L2) 1380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Splice L2 before L1's members. 1400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *End = L2; 1410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (End->next) 1420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1, End = End->next; 1430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1; 1440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->next = L1->next; 1450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1->next = L2; 1460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLocationNo - Return the location number that matches Loc. 1500804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned getLocationNo(const MachineOperand &LocMO) { 1511744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isReg()) { 1521744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.getReg() == 0) 1531744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return ~0u; 1541744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // For register locations we dont care about use/def and other flags. 1551744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1561744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 1571744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getReg() == LocMO.getReg() && 1581744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getSubReg() == LocMO.getSubReg()) 1591744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 1601744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } else 1611744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1621744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isIdenticalTo(locations[i])) 1631744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 1640804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.push_back(LocMO); 1650804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // We are storing a MachineOperand outside a MachineInstr. 1660804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.back().clearParent(); 1671744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't store def operands. 1681744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations.back().isReg()) 1691744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations.back().setIsUse(); 1700804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return locations.size() - 1; 1710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1731744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtRegs - Ensure that all virtual register locations are mapped. 1741744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtRegs(LDVImpl *LDV); 1751744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 1760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// addDef - Add a definition point to this value. 1770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void addDef(SlotIndex Idx, const MachineOperand &LocMO) { 1780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Add a singular (Idx,Idx) -> Loc mapping. 1790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 1800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!I.valid() || I.start() != Idx) 1810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), getLocationNo(LocMO)); 1820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// extendDef - Extend the current definition as far as possible down the 1850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// dominator tree. Stop when meeting an existing def or when leaving the live 1860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// range of VNI. 1871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// End points where VNI is no longer live are added to Kills. 1880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Starting point for the definition. 1890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LocNo Location number to propagate. 1900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LI Restrict liveness to where LI has the value VNI. May be null. 1910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param VNI When LI is not null, this is the value to restrict to. 1921744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Append end points of VNI's live range to Kills. 1930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LIS Live intervals analysis. 1940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MDT Dominator tree. 1950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void extendDef(SlotIndex Idx, unsigned LocNo, 1960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveInterval *LI, const VNInfo *VNI, 1971744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 1980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveIntervals &LIS, MachineDominatorTree &MDT); 1990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// addDefsFromCopies - The value in LI/LocNo may be copies to other 2011744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// registers. Determine if any of the copies are available at the kill 2021744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// points, and add defs if possible. 2031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LI Scan for copies of the value in LI->reg. 2041744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LocNo Location number of LI->reg. 2051744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Points where the range of LocNo could be extended. 2061744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param NewDefs Append (Idx, LocNo) of inserted defs here. 2071744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 2081744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 2091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 2101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, 2111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS); 2121744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 2130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all locations after 2140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 2151744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void computeIntervals(MachineRegisterInfo &MRI, 2161744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS, MachineDominatorTree &MDT); 2170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 21830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen /// renameRegister - Update locations to rewrite OldReg as NewReg:SubIdx. 21930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx, 22030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen const TargetRegisterInfo *TRI); 22130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 222f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace OldReg ranges with NewRegs ranges where NewRegs is 223f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// live. Returns true if any changes were made. 224f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool splitRegister(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs); 225f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 22642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// rewriteLocations - Rewrite virtual register locations according to the 22742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// provided virtual register map. 22842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI); 22942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 23042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// emitDebugVariables - Recreate DBG_VALUE instruction from data structures. 23142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM, 23242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TRI); 23342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 234f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// findDebugLoc - Return DebugLoc used for this DBG_VALUE instruction. A 235f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// variable may have more than one corresponding DBG_VALUE instructions. 236f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// Only first one needs DebugLoc to identify variable's lexical scope 237f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// in source file. 238f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc findDebugLoc(); 239e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen void print(raw_ostream&, const TargetMachine*); 2400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 2410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 2420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LDVImpl - Implementation of the LiveDebugVariables pass. 2440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 2450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass LDVImpl { 2460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveDebugVariables &pass; 2470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::Allocator allocator; 2480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineFunction *MF; 2490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveIntervals *LIS; 2500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineDominatorTree *MDT; 2510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const TargetRegisterInfo *TRI; 2520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// userValues - All allocated UserValue instances. 2540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<UserValue*, 8> userValues; 2550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map virtual register to eq class leader. 2570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<unsigned, UserValue*> VRMap; 2586ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen VRMap virtRegToEqClass; 2590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map user variable to eq class leader. 2610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<const MDNode *, UserValue*> UVMap; 2620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UVMap userVarMap; 2630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getUserValue - Find or create a UserValue. 265f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *getUserValue(const MDNode *Var, unsigned Offset, DebugLoc DL); 2660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 26730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen /// lookupVirtReg - Find the EC leader for VirtReg or null. 26830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen UserValue *lookupVirtReg(unsigned VirtReg); 26930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 2700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// handleDebugValue - Add DBG_VALUE instruction to our maps. 2710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MI DBG_VALUE instruction 2720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Last valid SLotIndex before instruction. 2730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if the DBG_VALUE instruction should be deleted. 2740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool handleDebugValue(MachineInstr *MI, SlotIndex Idx); 2750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collectDebugValues - Collect and erase all DBG_VALUE instructions, adding 2770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// a UserValue def for each instruction. 2780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param mf MachineFunction to be scanned. 2790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if any debug values were found. 2800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool collectDebugValues(MachineFunction &mf); 2810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all user values after 2830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 2840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void computeIntervals(); 2850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 2870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LDVImpl(LiveDebugVariables *ps) : pass(*ps) {} 2880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool runOnMachineFunction(MachineFunction &mf); 2890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// clear - Relase all memory. 2910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void clear() { 2920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DeleteContainerPointers(userValues); 2930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userValues.clear(); 2946ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen virtRegToEqClass.clear(); 2950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userVarMap.clear(); 2960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 2970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2981744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtReg - Map virtual register to an equivalence class. 2991744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtReg(unsigned VirtReg, UserValue *EC); 3001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 3017a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner /// renameRegister - Replace all references to OldReg with NewReg:SubIdx. 30230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx); 30330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 304f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace all references to OldReg with NewRegs. 305f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen void splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs); 306f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 30742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// emitDebugVariables - Recreate DBG_VALUE instruction from data structures. 30842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM); 30942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 3100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void print(raw_ostream&); 3110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 3120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 3130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 314e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesenvoid UserValue::print(raw_ostream &OS, const TargetMachine *TM) { 3150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (const MDString *MDS = dyn_cast<MDString>(variable->getOperand(2))) 3160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "!\"" << MDS->getString() << "\"\t"; 3170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (offset) 3180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '+' << offset; 3190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) { 3200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << " [" << I.start() << ';' << I.stop() << "):"; 3210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 3220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "undef"; 3230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 3240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << I.value(); 3250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 326e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) { 327e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen OS << " Loc" << i << '='; 328e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen locations[i].print(OS, TM); 329e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen } 3300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '\n'; 3310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::print(raw_ostream &OS) { 3340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "********** DEBUG VARIABLES **********\n"; 3350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) 336e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen userValues[i]->print(OS, &MF->getTarget()); 3370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3395daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesenvoid UserValue::coalesceLocation(unsigned LocNo) { 3400804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned KeepLoc = 0; 3410804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen for (unsigned e = locations.size(); KeepLoc != e; ++KeepLoc) { 3420804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == LocNo) 3430804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen continue; 3440804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (locations[KeepLoc].isIdenticalTo(locations[LocNo])) 3450804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen break; 3465daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 3470804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // No matches. 3480804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == locations.size()) 3490804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return; 3500804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen 3510804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // Keep the smaller location, erase the larger one. 3520804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned EraseLoc = LocNo; 3530804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc > EraseLoc) 3540804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen std::swap(KeepLoc, EraseLoc); 3555daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen locations.erase(locations.begin() + EraseLoc); 3565daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 3575daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen // Rewrite values. 3585daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid(); ++I) { 3595daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen unsigned v = I.value(); 3605daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen if (v == EraseLoc) 3615daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValue(KeepLoc); // Coalesce when possible. 3625daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen else if (v > EraseLoc) 3635daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValueUnchecked(v-1); // Avoid coalescing with untransformed values. 3645daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 3655daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen} 3665daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 3671744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid UserValue::mapVirtRegs(LDVImpl *LDV) { 3681744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 3691744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 3701744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen TargetRegisterInfo::isVirtualRegister(locations[i].getReg())) 3711744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LDV->mapVirtReg(locations[i].getReg(), this); 3721744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 3731744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 374f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelUserValue *LDVImpl::getUserValue(const MDNode *Var, unsigned Offset, 375f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc DL) { 3760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *&Leader = userVarMap[Var]; 3770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Leader) { 3780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *UV = Leader->getLeader(); 3790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UV; 3800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (; UV; UV = UV->getNext()) 3810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (UV->match(Var, Offset)) 3820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 3830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 3840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 385f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *UV = new UserValue(Var, Offset, DL, allocator); 3860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userValues.push_back(UV); 3870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, UV); 3880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 3890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::mapVirtReg(unsigned VirtReg, UserValue *EC) { 3920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(VirtReg) && "Only map VirtRegs"); 3936ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen UserValue *&Leader = virtRegToEqClass[VirtReg]; 3940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, EC); 3950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 39730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenUserValue *LDVImpl::lookupVirtReg(unsigned VirtReg) { 3986ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen if (UserValue *UV = virtRegToEqClass.lookup(VirtReg)) 39930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen return UV->getLeader(); 40030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen return 0; 40130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 40230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 4030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::handleDebugValue(MachineInstr *MI, SlotIndex Idx) { 4040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE loc, offset, variable 4050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (MI->getNumOperands() != 3 || 4060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen !MI->getOperand(1).isImm() || !MI->getOperand(2).isMetadata()) { 4070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "Can't handle " << *MI); 4080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return false; 4090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Get or create the UserValue for (variable,offset). 4120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned Offset = MI->getOperand(1).getImm(); 4130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const MDNode *Var = MI->getOperand(2).getMetadata(); 414f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *UV = getUserValue(Var, Offset, MI->getDebugLoc()); 4150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UV->addDef(Idx, MI->getOperand(0)); 4160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return true; 4170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::collectDebugValues(MachineFunction &mf) { 4200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = false; 4210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineFunction::iterator MFI = mf.begin(), MFE = mf.end(); MFI != MFE; 4220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MFI) { 4230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = MFI; 4240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end(); 4250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI != MBBE;) { 4260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!MBBI->isDebugValue()) { 4270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 4280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE has no slot index, use the previous instruction instead. 4310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = MBBI == MBB->begin() ? 4320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS->getMBBStartIdx(MBB) : 4330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS->getInstructionIndex(llvm::prior(MBBI)).getDefIndex(); 4340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Handle consecutive DBG_VALUE instructions with the same slot index. 4350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 4360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (handleDebugValue(MBBI, Idx)) { 4370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI = MBB->erase(MBBI); 4380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Changed = true; 4390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } else 4400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 4410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (MBBI != MBBE && MBBI->isDebugValue()); 4420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 4450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid UserValue::extendDef(SlotIndex Idx, unsigned LocNo, 4480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveInterval *LI, const VNInfo *VNI, 4491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 4500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveIntervals &LIS, MachineDominatorTree &MDT) { 4510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<SlotIndex, 16> Todo; 4520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Todo.push_back(Idx); 4530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 4550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Start = Todo.pop_back_val(); 4560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = LIS.getMBBFromIndex(Start); 4570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Stop = LIS.getMBBEndIdx(MBB); 45812a40314a91511b65bc83782fd5a3e981331adb1Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Start); 4590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limit to VNI's live range. 4610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool ToEnd = true; 4620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (LI && VNI) { 4630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveRange *Range = LI->getLiveRangeContaining(Start); 4641744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!Range || Range->valno != VNI) { 4651744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills) 4661744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Start); 4670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4681744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 4690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Range->end < Stop) 4700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Stop = Range->end, ToEnd = false; 4710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // There could already be a short def at Start. 4740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() <= Start) { 4750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Stop when meeting a different location or an already extended interval. 4760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Start = Start.getNextSlot(); 4770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != LocNo || I.stop() != Start) 4780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // This is a one-slot placeholder. Just skip it. 4800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 4810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limited by the next def. 4840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() < Stop) 4850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Stop = I.start(), ToEnd = false; 4861744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Limited by VNI's live range. 4871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen else if (!ToEnd && Kills) 4881744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Stop); 4890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Start >= Stop) 4910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Start, Stop, LocNo); 4940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // If we extended to the MBB end, propagate down the dominator tree. 4960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!ToEnd) 4970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const std::vector<MachineDomTreeNode*> &Children = 4990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT.getNode(MBB)->getChildren(); 5000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (unsigned i = 0, e = Children.size(); i != e; ++i) 5010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Todo.push_back(LIS.getMBBStartIdx(Children[i]->getBlock())); 5020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (!Todo.empty()); 5030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 5040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid 5061744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 5071744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 5081744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 5091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, LiveIntervals &LIS) { 5101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills.empty()) 5111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5121744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't track copies from physregs, there are too many uses. 5131744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(LI->reg)) 5141744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5151744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5161744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Collect all the (vreg, valno) pairs that are copies of LI. 5171744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<std::pair<LiveInterval*, const VNInfo*>, 8> CopyValues; 5181744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (MachineRegisterInfo::use_nodbg_iterator 5191744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen UI = MRI.use_nodbg_begin(LI->reg), 5201744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen UE = MRI.use_nodbg_end(); UI != UE; ++UI) { 5211744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Copies of the full value. 5221744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (UI.getOperand().getSubReg() || !UI->isCopy()) 5231744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5241744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineInstr *MI = &*UI; 5251744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned DstReg = MI->getOperand(0).getReg(); 5261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 52728cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // Don't follow copies to physregs. These are usually setting up call 52828cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // arguments, and the argument registers are always call clobbered. We are 52928cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // better off in the source register which could be a callee-saved register, 53028cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // or it could be spilled. 53128cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(DstReg)) 53228cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen continue; 53328cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen 5341744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Is LocNo extended to reach this copy? If not, another def may be blocking 5351744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // it, or we are looking at a wrong value of LI. 5361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = LIS.getInstructionIndex(MI); 5371744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx.getUseIndex()); 5381744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!I.valid() || I.value() != LocNo) 5391744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5401744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5411744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!LIS.hasInterval(DstReg)) 5421744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5431744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = &LIS.getInterval(DstReg); 5441744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const VNInfo *DstVNI = DstLI->getVNInfoAt(Idx.getDefIndex()); 5451744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen assert(DstVNI && DstVNI->def == Idx.getDefIndex() && "Bad copy value"); 5461744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen CopyValues.push_back(std::make_pair(DstLI, DstVNI)); 5471744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 5481744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (CopyValues.empty()) 5501744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5511744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5521744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Got " << CopyValues.size() << " copies of " << *LI << '\n'); 5531744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5541744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Try to add defs of the copied values for each kill point. 5551744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = Kills.size(); i != e; ++i) { 5561744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = Kills[i]; 5571744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned j = 0, e = CopyValues.size(); j != e; ++j) { 5581744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = CopyValues[j].first; 5591744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const VNInfo *DstVNI = CopyValues[j].second; 5601744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (DstLI->getVNInfoAt(Idx) != DstVNI) 5611744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5621744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Check that there isn't already a def at Idx 5631744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 5641744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (I.valid() && I.start() <= Idx) 5651744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5661744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Kill at " << Idx << " covered by valno #" 5671744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen << DstVNI->id << " in " << *DstLI << '\n'); 5681744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineInstr *CopyMI = LIS.getInstructionFromIndex(DstVNI->def); 5691744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen assert(CopyMI && CopyMI->isCopy() && "Bad copy value"); 5701744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned LocNo = getLocationNo(CopyMI->getOperand(0)); 5711744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), LocNo); 5721744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen NewDefs.push_back(std::make_pair(Idx, LocNo)); 5731744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen break; 5741744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 5751744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 5761744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 5771744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5781744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid 5791744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::computeIntervals(MachineRegisterInfo &MRI, 5801744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS, 5811744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineDominatorTree &MDT) { 5820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<std::pair<SlotIndex, unsigned>, 16> Defs; 5830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Collect all defs to be extended (Skipping undefs). 5850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) 5860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != ~0u) 5870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Defs.push_back(std::make_pair(I.start(), I.value())); 5880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5891744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Extend all defs, and possibly add new ones along the way. 5901744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0; i != Defs.size(); ++i) { 5910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = Defs[i].first; 5920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned LocNo = Defs[i].second; 5930804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen const MachineOperand &Loc = locations[LocNo]; 5940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Register locations are constrained to where the register value is live. 5960804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (Loc.isReg() && LIS.hasInterval(Loc.getReg())) { 5970804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen LiveInterval *LI = &LIS.getInterval(Loc.getReg()); 5980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const VNInfo *VNI = LI->getVNInfoAt(Idx); 5991744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<SlotIndex, 16> Kills; 6001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen extendDef(Idx, LocNo, LI, VNI, &Kills, LIS, MDT); 6011744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS); 6020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } else 6031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen extendDef(Idx, LocNo, 0, 0, 0, LIS, MDT); 6040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 6050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Finally, erase all the undefs. 6070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid();) 6080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 6090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.erase(); 6100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 6110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 6120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::computeIntervals() { 6151744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 6161744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen userValues[i]->computeIntervals(MF->getRegInfo(), *LIS, *MDT); 6171744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen userValues[i]->mapVirtRegs(this); 6181744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::runOnMachineFunction(MachineFunction &mf) { 6220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MF = &mf; 6230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS = &pass.getAnalysis<LiveIntervals>(); 6240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT = &pass.getAnalysis<MachineDominatorTree>(); 6250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen TRI = mf.getTarget().getRegisterInfo(); 6260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen clear(); 6270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: " 6280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen << ((Value*)mf.getFunction())->getName() 6290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen << " **********\n"); 6300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = collectDebugValues(mf); 6320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen computeIntervals(); 6330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(print(dbgs())); 6340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 6350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 637bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenbool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) { 63851a666f0e50a34b74212db9c5814153c885153a5Devang Patel if (!EnableLDV) 63951a666f0e50a34b74212db9c5814153c885153a5Devang Patel return false; 6400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!pImpl) 6410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen pImpl = new LDVImpl(this); 6420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf); 6430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LiveDebugVariables::releaseMemory() { 6460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (pImpl) 6470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->clear(); 6480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6500613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenLiveDebugVariables::~LiveDebugVariables() { 6510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (pImpl) 6520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen delete static_cast<LDVImpl*>(pImpl); 653bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 65430e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 65530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid UserValue:: 65630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx, 65730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen const TargetRegisterInfo *TRI) { 6585daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen for (unsigned i = locations.size(); i; --i) { 6595daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen unsigned LocNo = i - 1; 6600804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 6610804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (!Loc.isReg() || Loc.getReg() != OldReg) 66230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen continue; 6630804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (TargetRegisterInfo::isPhysicalRegister(NewReg)) 6640804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substPhysReg(NewReg, *TRI); 6650804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen else 6660804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substVirtReg(NewReg, SubIdx, *TRI); 6675daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen coalesceLocation(LocNo); 66830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen } 66930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 67030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 67130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LDVImpl:: 67230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx) { 6738d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen UserValue *UV = lookupVirtReg(OldReg); 6748d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen if (!UV) 6758d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen return; 6768d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen 6778d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen if (TargetRegisterInfo::isVirtualRegister(NewReg)) 6788d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen mapVirtReg(NewReg, UV); 6796ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen virtRegToEqClass.erase(OldReg); 6808d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen 6818d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen do { 68230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen UV->renameRegister(OldReg, NewReg, SubIdx, TRI); 6838d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen UV = UV->getNext(); 6848d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen } while (UV); 68530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 68630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 68730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LiveDebugVariables:: 68830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx) { 68930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen if (pImpl) 69030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->renameRegister(OldReg, NewReg, SubIdx); 69130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 69230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 693f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 694f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen// Live Range Splitting 695f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 696f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 697f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 698f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesenUserValue::splitLocation(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs) { 699f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG({ 700f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen dbgs() << "Splitting Loc" << OldLocNo << '\t'; 701f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen print(dbgs(), 0); 702f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen }); 703f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 704f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMap::iterator LocMapI; 705f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setMap(locInts); 706f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) { 707f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval *LI = NewRegs[i]; 708f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LI->empty()) 709f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 710f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 711f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Don't allocate the new LocNo until it is needed. 712f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned NewLocNo = ~0u; 713f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 714f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Iterate over the overlaps between locInts and LI. 715f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.find(LI->beginIndex()); 716f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 717f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 718f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LII = LI->advanceTo(LI->begin(), LocMapI.start()); 719f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LIE = LI->end(); 720f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid() && LII != LIE) { 721f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // At this point, we know that LocMapI.stop() > LII->start. 722f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 723f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII == LIE) 724f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 725f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 726f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Now LII->end > LocMapI.start(). Do we have an overlap? 727f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LocMapI.value() == OldLocNo && LII->start < LocMapI.stop()) { 728f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Overlapping correct location. Allocate NewLocNo now. 729f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (NewLocNo == ~0u) { 730f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MachineOperand MO = MachineOperand::CreateReg(LI->reg, false); 731f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MO.setSubReg(locations[OldLocNo].getSubReg()); 732f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen NewLocNo = getLocationNo(MO); 733f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange = true; 734f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 735f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 736f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStart = LocMapI.start(); 737f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStop = LocMapI.stop(); 738f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 739f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Trim LocMapI down to the LII overlap. 740f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LII->start) 741f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStartUnchecked(LII->start); 742f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LII->end) 743f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStopUnchecked(LII->end); 744f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 745f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Change the value in the overlap. This may trigger coalescing. 746f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValue(NewLocNo); 747f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 748f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Re-insert any removed OldLocNo ranges. 749f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LocMapI.start()) { 750f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LStart, LocMapI.start(), OldLocNo); 751f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 752f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen assert(LocMapI.valid() && "Unexpected coalescing"); 753f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 754f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LocMapI.stop()) { 755f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 756f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LII->end, LStop, OldLocNo); 757f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen --LocMapI; 758f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 759f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 760f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 761f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Advance to the next overlap. 762f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII->end < LocMapI.stop()) { 763f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (++LII == LIE) 764f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 765f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.advanceTo(LII->start); 766f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 767f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 768f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 769f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 770f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 771f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 772f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 773f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 774f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 775f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Finally, remove any remaining OldLocNo intervals and OldLocNo itself. 776f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen locations.erase(locations.begin() + OldLocNo); 777f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.goToBegin(); 778f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid()) { 779f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned v = LocMapI.value(); 780f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v == OldLocNo) { 781f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG(dbgs() << "Erasing [" << LocMapI.start() << ';' 782f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen << LocMapI.stop() << ")\n"); 783f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.erase(); 784f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 785f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v > OldLocNo) 786f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValueUnchecked(v-1); 787f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 788f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 789f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 790f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 791f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG({dbgs() << "Split result: \t"; print(dbgs(), 0);}); 792f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 793f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 794f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 795f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 796f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesenUserValue::splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 797f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 7986212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen // Split locations referring to OldReg. Iterate backwards so splitLocation can 7996212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen // safely erase unuused locations. 8006212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 8016212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen unsigned LocNo = i-1; 802f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen const MachineOperand *Loc = &locations[LocNo]; 803f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!Loc->isReg() || Loc->getReg() != OldReg) 804f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 805f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange |= splitLocation(LocNo, NewRegs); 806f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 807f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 808f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 809f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 810f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenvoid LDVImpl::splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 811f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 812f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (UserValue *UV = lookupVirtReg(OldReg); UV; UV = UV->getNext()) 813f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange |= UV->splitRegister(OldReg, NewRegs); 814f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 815f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!DidChange) 816f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return; 817f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 818f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Map all of the new virtual registers. 819f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen UserValue *UV = lookupVirtReg(OldReg); 820f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) 821f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen mapVirtReg(NewRegs[i]->reg, UV); 822f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 823f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 824f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenvoid LiveDebugVariables:: 825f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesensplitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 826f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (pImpl) 827f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->splitRegister(OldReg, NewRegs); 828f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 829f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 83042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid 83142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund OlesenUserValue::rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI) { 83242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Iterate over locations in reverse makes it easier to handle coalescing. 83342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 83442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo = i-1; 8350804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 83642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Only virtual registers are rewritten. 8370804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (!Loc.isReg() || !Loc.getReg() || 8380804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen !TargetRegisterInfo::isVirtualRegister(Loc.getReg())) 83942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen continue; 8400804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned VirtReg = Loc.getReg(); 841f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen if (VRM.isAssignedReg(VirtReg) && 842f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen TargetRegisterInfo::isPhysicalRegister(VRM.getPhys(VirtReg))) { 8430804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substPhysReg(VRM.getPhys(VirtReg), TRI); 844f0704d28f34b872f949ef8030651c7159ff6f32fJakob Stoklund Olesen } else if (VRM.getStackSlot(VirtReg) != VirtRegMap::NO_STACK_SLOT && 845f0704d28f34b872f949ef8030651c7159ff6f32fJakob Stoklund Olesen VRM.isSpillSlotUsed(VRM.getStackSlot(VirtReg))) { 84642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // FIXME: Translate SubIdx to a stackslot offset. 8470804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc = MachineOperand::CreateFI(VRM.getStackSlot(VirtReg)); 84842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } else { 8490804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setReg(0); 8500804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setSubReg(0); 85142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 8525daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen coalesceLocation(LocNo); 85342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 85442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 85542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 856f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel/// findInsertLocation - Find an iterator for inserting a DBG_VALUE 85742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen/// instruction. 85842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenstatic MachineBasicBlock::iterator 859f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelfindInsertLocation(MachineBasicBlock *MBB, SlotIndex Idx, 86042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS) { 86142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Start = LIS.getMBBStartIdx(MBB); 86242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getBaseIndex(); 86342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 86442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Try to find an insert location by going backwards from Idx. 86542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineInstr *MI; 86642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen while (!(MI = LIS.getInstructionFromIndex(Idx))) { 86742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // We've reached the beginning of MBB. 86842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (Idx == Start) { 86942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineBasicBlock::iterator I = MBB->SkipPHIsAndLabels(MBB->begin()); 87042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen return I; 87142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 87242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getPrevIndex(); 87342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 874f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel 875eea666f216ad3a8f8cd88a969176f86add7228f3Jakob Stoklund Olesen // Don't insert anything after the first terminator, though. 876eea666f216ad3a8f8cd88a969176f86add7228f3Jakob Stoklund Olesen return MI->getDesc().isTerminator() ? MBB->getFirstTerminator() : 877eea666f216ad3a8f8cd88a969176f86add7228f3Jakob Stoklund Olesen llvm::next(MachineBasicBlock::iterator(MI)); 87842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 87942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 880f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelDebugLoc UserValue::findDebugLoc() { 881f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc D = dl; 882f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel dl = DebugLoc(); 883f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel return D; 884f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel} 88542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid UserValue::insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, 88642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo, 88742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, 88842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo &TII) { 889f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel MachineBasicBlock::iterator I = findInsertLocation(MBB, Idx, LIS); 8900804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 89142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 89242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Frame index locations may require a target callback. 8930804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (Loc.isFI()) { 89442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineInstr *MI = TII.emitFrameIndexDebugValue(*MBB->getParent(), 895f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel Loc.getIndex(), offset, variable, 896f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel findDebugLoc()); 89742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (MI) { 89842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MBB->insert(I, MI); 89942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen return; 90042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 90142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 90242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // This is not a frame index, or the target is happy with a standard FI. 903f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE)) 9040804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen .addOperand(Loc).addImm(offset).addMetadata(variable); 90542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 90642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 90742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS, 90842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo &TII) { 90942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineFunction::iterator MFEnd = VRM->getMachineFunction().end(); 91042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 91142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid();) { 91242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Start = I.start(); 91342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Stop = I.stop(); 91442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo = I.value(); 91542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << "\t[" << Start << ';' << Stop << "):" << LocNo); 91642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineFunction::iterator MBB = LIS.getMBBFromIndex(Start); 91742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex MBBEnd = LIS.getMBBEndIdx(MBB); 91842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 91942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd); 92042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen insertDebugValue(MBB, Start, LocNo, LIS, TII); 92142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 92242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // This interval may span multiple basic blocks. 92342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Insert a DBG_VALUE into each one. 92442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen while(Stop > MBBEnd) { 92542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Move to the next block. 92642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Start = MBBEnd; 92742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (++MBB == MFEnd) 92842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen break; 92942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MBBEnd = LIS.getMBBEndIdx(MBB); 93042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd); 93142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen insertDebugValue(MBB, Start, LocNo, LIS, TII); 93242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 93342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << '\n'); 93442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (MBB == MFEnd) 93542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen break; 93642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 93742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen ++I; 93842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 93942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 94042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 94142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid LDVImpl::emitDebugValues(VirtRegMap *VRM) { 94242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n"); 94342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo *TII = MF->getTarget().getInstrInfo(); 94442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 94542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->rewriteLocations(*VRM, *TRI); 94642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->emitDebugValues(VRM, *LIS, *TII); 94742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 94842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 94942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 95042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid LiveDebugVariables::emitDebugValues(VirtRegMap *VRM) { 95142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (pImpl) 95242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM); 95342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 95442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 95542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 95630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#ifndef NDEBUG 95730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LiveDebugVariables::dump() { 95830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen if (pImpl) 95930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->print(dbgs()); 96030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 96130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#endif 96230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 963