LiveDebugVariables.cpp revision e8a0a1286417e73f4b2bffe21ae45882701e703f
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" 28a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel#include "llvm/Analysis/DebugInfo.h" 290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/ADT/IntervalMap.h" 30ad90d3a343ca73c32693e2b05b74462ccd9659cdDevang Patel#include "llvm/ADT/Statistic.h" 31c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel#include "llvm/CodeGen/LexicalScopes.h" 32bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/LiveIntervalAnalysis.h" 330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/CodeGen/MachineDominators.h" 3442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineFunction.h" 3542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineInstrBuilder.h" 361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen#include "llvm/CodeGen/MachineRegisterInfo.h" 37bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/Passes.h" 380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/CommandLine.h" 390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/Debug.h" 4042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/Target/TargetInstrInfo.h" 41bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/Target/TargetMachine.h" 420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Target/TargetRegisterInfo.h" 43bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 44bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenusing namespace llvm; 45bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 4651a666f0e50a34b74212db9c5814153c885153a5Devang Patelstatic cl::opt<bool> 4725dc2268a5aedcb5da57f065dbdb40d790b11bc0Jakob Stoklund OlesenEnableLDV("live-debug-variables", cl::init(true), 4851a666f0e50a34b74212db9c5814153c885153a5Devang Patel cl::desc("Enable the live debug variables pass"), cl::Hidden); 4951a666f0e50a34b74212db9c5814153c885153a5Devang Patel 50ad90d3a343ca73c32693e2b05b74462ccd9659cdDevang PatelSTATISTIC(NumInsertedDebugValues, "Number of DBG_VALUEs inserted"); 51bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenchar LiveDebugVariables::ID = 0; 52bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 53bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_BEGIN(LiveDebugVariables, "livedebugvars", 54bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 550613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(MachineDominatorTree) 56bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(LiveIntervals) 57bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_END(LiveDebugVariables, "livedebugvars", 58bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 59bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 60bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenvoid LiveDebugVariables::getAnalysisUsage(AnalysisUsage &AU) const { 610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen AU.addRequired<MachineDominatorTree>(); 62bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.addRequiredTransitive<LiveIntervals>(); 63bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.setPreservesAll(); 64bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen MachineFunctionPass::getAnalysisUsage(AU); 65bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 66bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 670613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenLiveDebugVariables::LiveDebugVariables() : MachineFunctionPass(ID), pImpl(0) { 68bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen initializeLiveDebugVariablesPass(*PassRegistry::getPassRegistry()); 69bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 70bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LocMap - Map of where a user value is live, and its location. 720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesentypedef IntervalMap<SlotIndex, unsigned, 4> LocMap; 730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7476f58d20313a23758399a59ceec0fbc6c2c16397Benjamin Kramernamespace { 753a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel/// UserValueScopes - Keeps track of lexical scopes associated with an 763a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel/// user value's source location. 773a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patelclass UserValueScopes { 783a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel DebugLoc DL; 793a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel LexicalScopes &LS; 803a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel SmallPtrSet<const MachineBasicBlock *, 4> LBlocks; 813a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 823a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patelpublic: 833a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes(DebugLoc D, LexicalScopes &L) : DL(D), LS(L) {} 843a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 853a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// dominates - Return true if current scope dominates at least one machine 863a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// instruction in a given machine basic block. 873a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel bool dominates(MachineBasicBlock *MBB) { 883a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (LBlocks.empty()) 893a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel LS.getMachineBasicBlocks(DL, LBlocks); 903a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (LBlocks.count(MBB) != 0 || LS.dominates(DL, MBB)) 913a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel return true; 923a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel return false; 933a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel } 943a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel}; 9576f58d20313a23758399a59ceec0fbc6c2c16397Benjamin Kramer} // end anonymous namespace 963a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValue - A user value is a part of a debug info user variable. 980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// A DBG_VALUE instruction notes that (a sub-register of) a virtual register 1000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// holds part of a user variable. The part is identified by a byte offset. 1010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 1020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValues are grouped into equivalence classes for easier searching. Two 1030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// user values are related if they refer to the same variable, or if they are 1040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// held by the same virtual register. The equivalence class is the transitive 1050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// closure of that relation. 1060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 1071744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenclass LDVImpl; 1080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass UserValue { 1090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const MDNode *variable; ///< The debug info variable we are part of. 1100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned offset; ///< Byte offset into variable. 111f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc dl; ///< The debug location for the variable. This is 112f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel ///< used by dwarf writer to find lexical scope. 1130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *leader; ///< Equivalence class leader. 1140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *next; ///< Next value in equivalence class, or null. 1150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Numbered locations referenced by locmap. 1170804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen SmallVector<MachineOperand, 4> locations; 1180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map of slot indices where this value is live. 1200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap locInts; 1210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1225daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// coalesceLocation - After LocNo was changed, check if it has become 1235daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// identical to another location, and coalesce them. This may cause LocNo or 1245daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// a later location to be erased, but no earlier location will be erased. 1255daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen void coalesceLocation(unsigned LocNo); 1265daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 12742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// insertDebugValue - Insert a DBG_VALUE into MBB at Idx for LocNo. 12842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, unsigned LocNo, 12942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TII); 13042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 131f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitLocation - Replace OldLocNo ranges with NewRegs ranges where NewRegs 132f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// is live. Returns true if any changes were made. 133f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool splitLocation(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs); 134f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 1350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 1360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// UserValue - Create a new UserValue. 137f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen UserValue(const MDNode *var, unsigned o, DebugLoc L, 138f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel LocMap::Allocator &alloc) 139f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel : variable(var), offset(o), dl(L), leader(this), next(0), locInts(alloc) 1400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen {} 1410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLeader - Get the leader of this value's equivalence class. 1430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getLeader() { 1440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *l = leader; 1450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (l != l->leader) 1460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen l = l->leader; 1470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return leader = l; 1480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getNext - Return the next UserValue in the equivalence class. 1510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getNext() const { return next; } 1520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 153a462d6e8ebe90f3732891b02a057a88038ac1228Devang Patel /// match - Does this UserValue match the parameters? 1540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool match(const MDNode *Var, unsigned Offset) const { 1550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Var == variable && Offset == offset; 1560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// merge - Merge equivalence classes. 1590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static UserValue *merge(UserValue *L1, UserValue *L2) { 1600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L2 = L2->getLeader(); 1610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!L1) 1620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L2; 1630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1 = L1->getLeader(); 1640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (L1 == L2) 1650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Splice L2 before L1's members. 1670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *End = L2; 1680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (End->next) 1690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1, End = End->next; 1700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1; 1710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->next = L1->next; 1720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1->next = L2; 1730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLocationNo - Return the location number that matches Loc. 1770804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned getLocationNo(const MachineOperand &LocMO) { 1781744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isReg()) { 1791744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.getReg() == 0) 1801744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return ~0u; 1811744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // For register locations we dont care about use/def and other flags. 1821744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1831744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 1841744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getReg() == LocMO.getReg() && 1851744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getSubReg() == LocMO.getSubReg()) 1861744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 1871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } else 1881744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1891744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isIdenticalTo(locations[i])) 1901744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 1910804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.push_back(LocMO); 1920804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // We are storing a MachineOperand outside a MachineInstr. 1930804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.back().clearParent(); 1941744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't store def operands. 1951744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations.back().isReg()) 1961744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations.back().setIsUse(); 1970804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return locations.size() - 1; 1980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtRegs - Ensure that all virtual register locations are mapped. 2011744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtRegs(LDVImpl *LDV); 2021744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 2030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// addDef - Add a definition point to this value. 2040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void addDef(SlotIndex Idx, const MachineOperand &LocMO) { 2050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Add a singular (Idx,Idx) -> Loc mapping. 2060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 2070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!I.valid() || I.start() != Idx) 2080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), getLocationNo(LocMO)); 20979513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen else 21079513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen // A later DBG_VALUE at the same SlotIndex overrides the old location. 21179513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen I.setValue(getLocationNo(LocMO)); 2120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 2130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// extendDef - Extend the current definition as far as possible down the 2150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// dominator tree. Stop when meeting an existing def or when leaving the live 2160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// range of VNI. 2171744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// End points where VNI is no longer live are added to Kills. 2180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Starting point for the definition. 2190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LocNo Location number to propagate. 2200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LI Restrict liveness to where LI has the value VNI. May be null. 2210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param VNI When LI is not null, this is the value to restrict to. 2221744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Append end points of VNI's live range to Kills. 2230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LIS Live intervals analysis. 2240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MDT Dominator tree. 2250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void extendDef(SlotIndex Idx, unsigned LocNo, 2260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveInterval *LI, const VNInfo *VNI, 2271744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 228c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 229b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS); 2300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2311744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// addDefsFromCopies - The value in LI/LocNo may be copies to other 2321744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// registers. Determine if any of the copies are available at the kill 2331744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// points, and add defs if possible. 2341744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LI Scan for copies of the value in LI->reg. 2351744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LocNo Location number of LI->reg. 2361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Points where the range of LocNo could be extended. 2371744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param NewDefs Append (Idx, LocNo) of inserted defs here. 2381744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 2391744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 2401744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 2411744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, 2421744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS); 2431744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 2440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all locations after 2450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 246e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen void computeIntervals(MachineRegisterInfo &MRI, const TargetRegisterInfo &TRI, 247c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 2483a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes &UVS); 2490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 25030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen /// renameRegister - Update locations to rewrite OldReg as NewReg:SubIdx. 25130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx, 25230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen const TargetRegisterInfo *TRI); 25330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 254f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace OldReg ranges with NewRegs ranges where NewRegs is 255f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// live. Returns true if any changes were made. 256f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool splitRegister(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs); 257f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 25842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// rewriteLocations - Rewrite virtual register locations according to the 25942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// provided virtual register map. 26042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI); 26142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 26242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// emitDebugVariables - Recreate DBG_VALUE instruction from data structures. 26342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM, 26442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TRI); 26542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 266f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// findDebugLoc - Return DebugLoc used for this DBG_VALUE instruction. A 267f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// variable may have more than one corresponding DBG_VALUE instructions. 268f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// Only first one needs DebugLoc to identify variable's lexical scope 269f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// in source file. 270f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc findDebugLoc(); 2713a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 2723a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// getDebugLoc - Return DebugLoc of this UserValue. 2733a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel DebugLoc getDebugLoc() { return dl;} 274e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen void print(raw_ostream&, const TargetMachine*); 2750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 2760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 2770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LDVImpl - Implementation of the LiveDebugVariables pass. 2790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 2800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass LDVImpl { 2810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveDebugVariables &pass; 2820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::Allocator allocator; 2830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineFunction *MF; 2840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveIntervals *LIS; 285c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LexicalScopes LS; 2860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineDominatorTree *MDT; 2870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const TargetRegisterInfo *TRI; 2880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// userValues - All allocated UserValue instances. 2900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<UserValue*, 8> userValues; 2910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map virtual register to eq class leader. 2930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<unsigned, UserValue*> VRMap; 2946ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen VRMap virtRegToEqClass; 2950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map user variable to eq class leader. 2970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<const MDNode *, UserValue*> UVMap; 2980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UVMap userVarMap; 2990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getUserValue - Find or create a UserValue. 301f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *getUserValue(const MDNode *Var, unsigned Offset, DebugLoc DL); 3020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 30330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen /// lookupVirtReg - Find the EC leader for VirtReg or null. 30430e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen UserValue *lookupVirtReg(unsigned VirtReg); 30530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 3060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// handleDebugValue - Add DBG_VALUE instruction to our maps. 3070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MI DBG_VALUE instruction 3080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Last valid SLotIndex before instruction. 3090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if the DBG_VALUE instruction should be deleted. 3100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool handleDebugValue(MachineInstr *MI, SlotIndex Idx); 3110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collectDebugValues - Collect and erase all DBG_VALUE instructions, adding 3130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// a UserValue def for each instruction. 3140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param mf MachineFunction to be scanned. 3150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if any debug values were found. 3160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool collectDebugValues(MachineFunction &mf); 3170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all user values after 3190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 3200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void computeIntervals(); 3210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 3230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LDVImpl(LiveDebugVariables *ps) : pass(*ps) {} 3240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool runOnMachineFunction(MachineFunction &mf); 3250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// clear - Relase all memory. 3270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void clear() { 3280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DeleteContainerPointers(userValues); 3290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userValues.clear(); 3306ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen virtRegToEqClass.clear(); 3310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userVarMap.clear(); 3320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 3330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3341744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtReg - Map virtual register to an equivalence class. 3351744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtReg(unsigned VirtReg, UserValue *EC); 3361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 3377a2bdde0a0eebcd2125055e0eacaca040f0b766cChris Lattner /// renameRegister - Replace all references to OldReg with NewReg:SubIdx. 33830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen void renameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx); 33930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 340f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace all references to OldReg with NewRegs. 341f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen void splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs); 342f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 34342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// emitDebugVariables - Recreate DBG_VALUE instruction from data structures. 34442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM); 34542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 3460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void print(raw_ostream&); 3470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 3480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 3490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 350e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesenvoid UserValue::print(raw_ostream &OS, const TargetMachine *TM) { 351a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel DIVariable DV(variable); 352a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel OS << "!\""; 353a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel DV.printExtendedName(OS); 354a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel OS << "\"\t"; 3550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (offset) 3560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '+' << offset; 3570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) { 3580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << " [" << I.start() << ';' << I.stop() << "):"; 3590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 3600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "undef"; 3610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 3620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << I.value(); 3630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 364e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) { 365e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen OS << " Loc" << i << '='; 366e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen locations[i].print(OS, TM); 367e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen } 3680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '\n'; 3690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::print(raw_ostream &OS) { 3720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "********** DEBUG VARIABLES **********\n"; 3730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) 374e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen userValues[i]->print(OS, &MF->getTarget()); 3750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3775daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesenvoid UserValue::coalesceLocation(unsigned LocNo) { 3780804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned KeepLoc = 0; 3790804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen for (unsigned e = locations.size(); KeepLoc != e; ++KeepLoc) { 3800804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == LocNo) 3810804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen continue; 3820804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (locations[KeepLoc].isIdenticalTo(locations[LocNo])) 3830804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen break; 3845daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 3850804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // No matches. 3860804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == locations.size()) 3870804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return; 3880804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen 3890804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // Keep the smaller location, erase the larger one. 3900804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned EraseLoc = LocNo; 3910804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc > EraseLoc) 3920804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen std::swap(KeepLoc, EraseLoc); 3935daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen locations.erase(locations.begin() + EraseLoc); 3945daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 3955daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen // Rewrite values. 3965daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid(); ++I) { 3975daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen unsigned v = I.value(); 3985daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen if (v == EraseLoc) 3995daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValue(KeepLoc); // Coalesce when possible. 4005daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen else if (v > EraseLoc) 4015daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValueUnchecked(v-1); // Avoid coalescing with untransformed values. 4025daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 4035daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen} 4045daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 4051744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid UserValue::mapVirtRegs(LDVImpl *LDV) { 4061744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 4071744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 4081744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen TargetRegisterInfo::isVirtualRegister(locations[i].getReg())) 4091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LDV->mapVirtReg(locations[i].getReg(), this); 4101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 4111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 412f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelUserValue *LDVImpl::getUserValue(const MDNode *Var, unsigned Offset, 413f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc DL) { 4140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *&Leader = userVarMap[Var]; 4150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Leader) { 4160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *UV = Leader->getLeader(); 4170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UV; 4180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (; UV; UV = UV->getNext()) 4190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (UV->match(Var, Offset)) 4200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 4210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 423f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *UV = new UserValue(Var, Offset, DL, allocator); 4240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userValues.push_back(UV); 4250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, UV); 4260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 4270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::mapVirtReg(unsigned VirtReg, UserValue *EC) { 4300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(VirtReg) && "Only map VirtRegs"); 4316ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen UserValue *&Leader = virtRegToEqClass[VirtReg]; 4320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, EC); 4330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 43530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenUserValue *LDVImpl::lookupVirtReg(unsigned VirtReg) { 4366ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen if (UserValue *UV = virtRegToEqClass.lookup(VirtReg)) 43730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen return UV->getLeader(); 43830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen return 0; 43930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 44030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 4410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::handleDebugValue(MachineInstr *MI, SlotIndex Idx) { 4420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE loc, offset, variable 4430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (MI->getNumOperands() != 3 || 4440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen !MI->getOperand(1).isImm() || !MI->getOperand(2).isMetadata()) { 4450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "Can't handle " << *MI); 4460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return false; 4470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Get or create the UserValue for (variable,offset). 4500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned Offset = MI->getOperand(1).getImm(); 4510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const MDNode *Var = MI->getOperand(2).getMetadata(); 452f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel UserValue *UV = getUserValue(Var, Offset, MI->getDebugLoc()); 4530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UV->addDef(Idx, MI->getOperand(0)); 4540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return true; 4550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::collectDebugValues(MachineFunction &mf) { 4580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = false; 4590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineFunction::iterator MFI = mf.begin(), MFE = mf.end(); MFI != MFE; 4600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MFI) { 4610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = MFI; 4620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end(); 4630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI != MBBE;) { 4640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!MBBI->isDebugValue()) { 4650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 4660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE has no slot index, use the previous instruction instead. 4690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = MBBI == MBB->begin() ? 4700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS->getMBBStartIdx(MBB) : 4712debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen LIS->getInstructionIndex(llvm::prior(MBBI)).getRegSlot(); 4720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Handle consecutive DBG_VALUE instructions with the same slot index. 4730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 4740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (handleDebugValue(MBBI, Idx)) { 4750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI = MBB->erase(MBBI); 4760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Changed = true; 4770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } else 4780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 4790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (MBBI != MBBE && MBBI->isDebugValue()); 4800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 4830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid UserValue::extendDef(SlotIndex Idx, unsigned LocNo, 4860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveInterval *LI, const VNInfo *VNI, 4871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 488c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 489b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS) { 4900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<SlotIndex, 16> Todo; 4910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Todo.push_back(Idx); 4920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 4930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Start = Todo.pop_back_val(); 4940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = LIS.getMBBFromIndex(Start); 4950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Stop = LIS.getMBBEndIdx(MBB); 49612a40314a91511b65bc83782fd5a3e981331adb1Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Start); 4970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limit to VNI's live range. 4990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool ToEnd = true; 5000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (LI && VNI) { 5010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveRange *Range = LI->getLiveRangeContaining(Start); 5021744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!Range || Range->valno != VNI) { 5031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills) 5041744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Start); 5050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5061744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 5070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Range->end < Stop) 5080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Stop = Range->end, ToEnd = false; 5090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // There could already be a short def at Start. 5120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() <= Start) { 5130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Stop when meeting a different location or an already extended interval. 5140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Start = Start.getNextSlot(); 5150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != LocNo || I.stop() != Start) 5160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // This is a one-slot placeholder. Just skip it. 5180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 5190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limited by the next def. 5220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() < Stop) 5230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Stop = I.start(), ToEnd = false; 5241744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Limited by VNI's live range. 5251744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen else if (!ToEnd && Kills) 5261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Stop); 5270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Start >= Stop) 5290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Start, Stop, LocNo); 5320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // If we extended to the MBB end, propagate down the dominator tree. 5340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!ToEnd) 5350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const std::vector<MachineDomTreeNode*> &Children = 5370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT.getNode(MBB)->getChildren(); 538c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel for (unsigned i = 0, e = Children.size(); i != e; ++i) { 539c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel MachineBasicBlock *MBB = Children[i]->getBlock(); 5403a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (UVS.dominates(MBB)) 541c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel Todo.push_back(LIS.getMBBStartIdx(MBB)); 542c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel } 5430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (!Todo.empty()); 5440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 5450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid 5471744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 5481744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 5491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 5501744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, LiveIntervals &LIS) { 5511744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills.empty()) 5521744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5531744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't track copies from physregs, there are too many uses. 5541744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(LI->reg)) 5551744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5561744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5571744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Collect all the (vreg, valno) pairs that are copies of LI. 5581744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<std::pair<LiveInterval*, const VNInfo*>, 8> CopyValues; 5591744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (MachineRegisterInfo::use_nodbg_iterator 5601744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen UI = MRI.use_nodbg_begin(LI->reg), 5611744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen UE = MRI.use_nodbg_end(); UI != UE; ++UI) { 5621744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Copies of the full value. 5631744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (UI.getOperand().getSubReg() || !UI->isCopy()) 5641744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5651744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineInstr *MI = &*UI; 5661744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned DstReg = MI->getOperand(0).getReg(); 5671744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 56828cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // Don't follow copies to physregs. These are usually setting up call 56928cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // arguments, and the argument registers are always call clobbered. We are 57028cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // better off in the source register which could be a callee-saved register, 57128cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // or it could be spilled. 57228cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(DstReg)) 57328cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen continue; 57428cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen 5751744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Is LocNo extended to reach this copy? If not, another def may be blocking 5761744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // it, or we are looking at a wrong value of LI. 5771744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = LIS.getInstructionIndex(MI); 5782debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx.getRegSlot(true)); 5791744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!I.valid() || I.value() != LocNo) 5801744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5811744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5821744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!LIS.hasInterval(DstReg)) 5831744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5841744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = &LIS.getInterval(DstReg); 5852debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen const VNInfo *DstVNI = DstLI->getVNInfoAt(Idx.getRegSlot()); 5862debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen assert(DstVNI && DstVNI->def == Idx.getRegSlot() && "Bad copy value"); 5871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen CopyValues.push_back(std::make_pair(DstLI, DstVNI)); 5881744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 5891744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5901744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (CopyValues.empty()) 5911744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5921744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5931744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Got " << CopyValues.size() << " copies of " << *LI << '\n'); 5941744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5951744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Try to add defs of the copied values for each kill point. 5961744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = Kills.size(); i != e; ++i) { 5971744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = Kills[i]; 5981744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned j = 0, e = CopyValues.size(); j != e; ++j) { 5991744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = CopyValues[j].first; 6001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const VNInfo *DstVNI = CopyValues[j].second; 6011744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (DstLI->getVNInfoAt(Idx) != DstVNI) 6021744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Check that there isn't already a def at Idx 6041744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 6051744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (I.valid() && I.start() <= Idx) 6061744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6071744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Kill at " << Idx << " covered by valno #" 6081744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen << DstVNI->id << " in " << *DstLI << '\n'); 6091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineInstr *CopyMI = LIS.getInstructionFromIndex(DstVNI->def); 6101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen assert(CopyMI && CopyMI->isCopy() && "Bad copy value"); 6111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned LocNo = getLocationNo(CopyMI->getOperand(0)); 6121744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), LocNo); 6131744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen NewDefs.push_back(std::make_pair(Idx, LocNo)); 6141744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen break; 6151744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6161744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6171744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 6181744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6191744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid 6201744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::computeIntervals(MachineRegisterInfo &MRI, 621e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen const TargetRegisterInfo &TRI, 6221744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS, 623c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel MachineDominatorTree &MDT, 624b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS) { 6250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<std::pair<SlotIndex, unsigned>, 16> Defs; 6260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Collect all defs to be extended (Skipping undefs). 6280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) 6290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != ~0u) 6300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Defs.push_back(std::make_pair(I.start(), I.value())); 6310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6321744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Extend all defs, and possibly add new ones along the way. 6331744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0; i != Defs.size(); ++i) { 6340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = Defs[i].first; 6350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned LocNo = Defs[i].second; 6360804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen const MachineOperand &Loc = locations[LocNo]; 6370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 638e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen if (!Loc.isReg()) { 639e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen extendDef(Idx, LocNo, 0, 0, 0, LIS, MDT, UVS); 640e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen continue; 641e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen } 642e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen 6430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Register locations are constrained to where the register value is live. 644e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen if (TargetRegisterInfo::isVirtualRegister(Loc.getReg())) { 6450804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen LiveInterval *LI = &LIS.getInterval(Loc.getReg()); 6460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const VNInfo *VNI = LI->getVNInfoAt(Idx); 6471744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<SlotIndex, 16> Kills; 6483a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel extendDef(Idx, LocNo, LI, VNI, &Kills, LIS, MDT, UVS); 6491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS); 650e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen continue; 651e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen } 652e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen 653e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen // For physregs, use the live range of the first regunit as a guide. 654e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen unsigned Unit = *MCRegUnitIterator(Loc.getReg(), &TRI); 655e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen LiveInterval *LI = &LIS.getRegUnit(Unit); 656e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen const VNInfo *VNI = LI->getVNInfoAt(Idx); 657e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen // Don't track copies from physregs, it is too expensive. 658e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen extendDef(Idx, LocNo, LI, VNI, 0, LIS, MDT, UVS); 6590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 6600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6610613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Finally, erase all the undefs. 6620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid();) 6630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 6640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.erase(); 6650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 6660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 6670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::computeIntervals() { 6701744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 6713a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes UVS(userValues[i]->getDebugLoc(), LS); 672e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen userValues[i]->computeIntervals(MF->getRegInfo(), *TRI, *LIS, *MDT, UVS); 6731744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen userValues[i]->mapVirtRegs(this); 6741744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::runOnMachineFunction(MachineFunction &mf) { 6780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MF = &mf; 6790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS = &pass.getAnalysis<LiveIntervals>(); 6800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT = &pass.getAnalysis<MachineDominatorTree>(); 6810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen TRI = mf.getTarget().getRegisterInfo(); 6820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen clear(); 683c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LS.initialize(mf); 6840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: " 6850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen << ((Value*)mf.getFunction())->getName() 6860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen << " **********\n"); 6870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = collectDebugValues(mf); 6890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen computeIntervals(); 6900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(print(dbgs())); 691c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LS.releaseMemory(); 6920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 6930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 695bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenbool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) { 69651a666f0e50a34b74212db9c5814153c885153a5Devang Patel if (!EnableLDV) 69751a666f0e50a34b74212db9c5814153c885153a5Devang Patel return false; 6980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!pImpl) 6990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen pImpl = new LDVImpl(this); 7000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf); 7010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LiveDebugVariables::releaseMemory() { 7040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (pImpl) 7050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->clear(); 7060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7080613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenLiveDebugVariables::~LiveDebugVariables() { 7090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (pImpl) 7100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen delete static_cast<LDVImpl*>(pImpl); 711bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 71230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 71330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid UserValue:: 71430e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx, 71530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen const TargetRegisterInfo *TRI) { 7165daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen for (unsigned i = locations.size(); i; --i) { 7175daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen unsigned LocNo = i - 1; 7180804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 7190804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (!Loc.isReg() || Loc.getReg() != OldReg) 72030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen continue; 7210804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (TargetRegisterInfo::isPhysicalRegister(NewReg)) 7220804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substPhysReg(NewReg, *TRI); 7230804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen else 7240804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substVirtReg(NewReg, SubIdx, *TRI); 7255daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen coalesceLocation(LocNo); 72630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen } 72730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 72830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 72930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LDVImpl:: 73030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx) { 7318d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen UserValue *UV = lookupVirtReg(OldReg); 7328d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen if (!UV) 7338d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen return; 7348d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen 7358d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen if (TargetRegisterInfo::isVirtualRegister(NewReg)) 7368d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen mapVirtReg(NewReg, UV); 73770724aaf7329b8de8e53648b2a3afcbbf46ddbb7Jakob Stoklund Olesen if (OldReg != NewReg) 73870724aaf7329b8de8e53648b2a3afcbbf46ddbb7Jakob Stoklund Olesen virtRegToEqClass.erase(OldReg); 7398d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen 7408d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen do { 74130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen UV->renameRegister(OldReg, NewReg, SubIdx, TRI); 7428d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen UV = UV->getNext(); 7438d2584a1d9ab56d35884d035e4da6146b4d7391fJakob Stoklund Olesen } while (UV); 74430e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 74530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 74630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LiveDebugVariables:: 74730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenrenameRegister(unsigned OldReg, unsigned NewReg, unsigned SubIdx) { 74830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen if (pImpl) 74930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->renameRegister(OldReg, NewReg, SubIdx); 75030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 75130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 752f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 753f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen// Live Range Splitting 754f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 755f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 756f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 757f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesenUserValue::splitLocation(unsigned OldLocNo, ArrayRef<LiveInterval*> NewRegs) { 758f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG({ 759f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen dbgs() << "Splitting Loc" << OldLocNo << '\t'; 760f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen print(dbgs(), 0); 761f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen }); 762f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 763f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMap::iterator LocMapI; 764f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setMap(locInts); 765f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) { 766f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval *LI = NewRegs[i]; 767f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LI->empty()) 768f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 769f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 770f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Don't allocate the new LocNo until it is needed. 771f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned NewLocNo = ~0u; 772f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 773f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Iterate over the overlaps between locInts and LI. 774f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.find(LI->beginIndex()); 775f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 776f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 777f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LII = LI->advanceTo(LI->begin(), LocMapI.start()); 778f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LIE = LI->end(); 779f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid() && LII != LIE) { 780f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // At this point, we know that LocMapI.stop() > LII->start. 781f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 782f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII == LIE) 783f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 784f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 785f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Now LII->end > LocMapI.start(). Do we have an overlap? 786f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LocMapI.value() == OldLocNo && LII->start < LocMapI.stop()) { 787f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Overlapping correct location. Allocate NewLocNo now. 788f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (NewLocNo == ~0u) { 789f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MachineOperand MO = MachineOperand::CreateReg(LI->reg, false); 790f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MO.setSubReg(locations[OldLocNo].getSubReg()); 791f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen NewLocNo = getLocationNo(MO); 792f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange = true; 793f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 794f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 795f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStart = LocMapI.start(); 796f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStop = LocMapI.stop(); 797f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 798f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Trim LocMapI down to the LII overlap. 799f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LII->start) 800f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStartUnchecked(LII->start); 801f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LII->end) 802f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStopUnchecked(LII->end); 803f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 804f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Change the value in the overlap. This may trigger coalescing. 805f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValue(NewLocNo); 806f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 807f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Re-insert any removed OldLocNo ranges. 808f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LocMapI.start()) { 809f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LStart, LocMapI.start(), OldLocNo); 810f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 811f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen assert(LocMapI.valid() && "Unexpected coalescing"); 812f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 813f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LocMapI.stop()) { 814f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 815f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LII->end, LStop, OldLocNo); 816f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen --LocMapI; 817f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 818f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 819f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 820f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Advance to the next overlap. 821f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII->end < LocMapI.stop()) { 822f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (++LII == LIE) 823f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 824f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.advanceTo(LII->start); 825f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 826f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 827f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 828f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 829f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 830f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 831f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 832f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 833f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 834f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Finally, remove any remaining OldLocNo intervals and OldLocNo itself. 835f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen locations.erase(locations.begin() + OldLocNo); 836f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.goToBegin(); 837f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid()) { 838f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned v = LocMapI.value(); 839f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v == OldLocNo) { 840f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG(dbgs() << "Erasing [" << LocMapI.start() << ';' 841f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen << LocMapI.stop() << ")\n"); 842f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.erase(); 843f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 844f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v > OldLocNo) 845f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValueUnchecked(v-1); 846f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 847f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 848f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 849f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 850f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG({dbgs() << "Split result: \t"; print(dbgs(), 0);}); 851f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 852f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 853f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 854f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 855f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesenUserValue::splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 856f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 8576212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen // Split locations referring to OldReg. Iterate backwards so splitLocation can 8587cc5177d460333ca9a2f3c0783dd0d0490456867Eric Christopher // safely erase unused locations. 8596212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 8606212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen unsigned LocNo = i-1; 861f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen const MachineOperand *Loc = &locations[LocNo]; 862f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!Loc->isReg() || Loc->getReg() != OldReg) 863f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 864f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange |= splitLocation(LocNo, NewRegs); 865f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 866f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 867f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 868f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 869f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenvoid LDVImpl::splitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 870f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 871f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (UserValue *UV = lookupVirtReg(OldReg); UV; UV = UV->getNext()) 872f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange |= UV->splitRegister(OldReg, NewRegs); 873f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 874f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!DidChange) 875f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return; 876f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 877f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Map all of the new virtual registers. 878f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen UserValue *UV = lookupVirtReg(OldReg); 879f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) 880f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen mapVirtReg(NewRegs[i]->reg, UV); 881f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 882f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 883f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenvoid LiveDebugVariables:: 884f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund OlesensplitRegister(unsigned OldReg, ArrayRef<LiveInterval*> NewRegs) { 885f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (pImpl) 886f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->splitRegister(OldReg, NewRegs); 887f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 888f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 88942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid 89042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund OlesenUserValue::rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI) { 89142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Iterate over locations in reverse makes it easier to handle coalescing. 89242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 89342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo = i-1; 8940804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 89542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Only virtual registers are rewritten. 8960804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (!Loc.isReg() || !Loc.getReg() || 8970804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen !TargetRegisterInfo::isVirtualRegister(Loc.getReg())) 89842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen continue; 8990804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned VirtReg = Loc.getReg(); 900f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen if (VRM.isAssignedReg(VirtReg) && 901f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen TargetRegisterInfo::isPhysicalRegister(VRM.getPhys(VirtReg))) { 902cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // This can create a %noreg operand in rare cases when the sub-register 903cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // index is no longer available. That means the user value is in a 904cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // non-existent sub-register, and %noreg is exactly what we want. 9050804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substPhysReg(VRM.getPhys(VirtReg), TRI); 906cb39064e7aee2273da1d00e6b800db84ddc34b6bJakob Stoklund Olesen } else if (VRM.getStackSlot(VirtReg) != VirtRegMap::NO_STACK_SLOT) { 90742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // FIXME: Translate SubIdx to a stackslot offset. 9080804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc = MachineOperand::CreateFI(VRM.getStackSlot(VirtReg)); 90942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } else { 9100804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setReg(0); 9110804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setSubReg(0); 91242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 9135daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen coalesceLocation(LocNo); 91442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 91542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 91642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 917f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel/// findInsertLocation - Find an iterator for inserting a DBG_VALUE 91842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen/// instruction. 91942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenstatic MachineBasicBlock::iterator 920f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelfindInsertLocation(MachineBasicBlock *MBB, SlotIndex Idx, 92142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS) { 92242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Start = LIS.getMBBStartIdx(MBB); 92342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getBaseIndex(); 92442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 92542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Try to find an insert location by going backwards from Idx. 92642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineInstr *MI; 92742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen while (!(MI = LIS.getInstructionFromIndex(Idx))) { 92842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // We've reached the beginning of MBB. 92942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (Idx == Start) { 93042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineBasicBlock::iterator I = MBB->SkipPHIsAndLabels(MBB->begin()); 93142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen return I; 93242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 93342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getPrevIndex(); 93442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 935f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel 936eea666f216ad3a8f8cd88a969176f86add7228f3Jakob Stoklund Olesen // Don't insert anything after the first terminator, though. 9375a96b3dad2f634c9081c8b2b6c2575441dc5a2bdEvan Cheng return MI->isTerminator() ? MBB->getFirstTerminator() : 9385a96b3dad2f634c9081c8b2b6c2575441dc5a2bdEvan Cheng llvm::next(MachineBasicBlock::iterator(MI)); 93942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 94042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 941f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelDebugLoc UserValue::findDebugLoc() { 942f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc D = dl; 943f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel dl = DebugLoc(); 944f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel return D; 945f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel} 94642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid UserValue::insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, 94742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo, 94842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, 94942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo &TII) { 950f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel MachineBasicBlock::iterator I = findInsertLocation(MBB, Idx, LIS); 9510804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 952d9f3fc7faaa7686af3e1a004d86397da9c8e0449Devang Patel ++NumInsertedDebugValues; 95342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 95442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Frame index locations may require a target callback. 9550804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (Loc.isFI()) { 95642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineInstr *MI = TII.emitFrameIndexDebugValue(*MBB->getParent(), 957f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel Loc.getIndex(), offset, variable, 958f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel findDebugLoc()); 95942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (MI) { 96042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MBB->insert(I, MI); 96142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen return; 96242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 96342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 96442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // This is not a frame index, or the target is happy with a standard FI. 965f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE)) 9660804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen .addOperand(Loc).addImm(offset).addMetadata(variable); 96742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 96842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 96942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid UserValue::emitDebugValues(VirtRegMap *VRM, LiveIntervals &LIS, 97042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo &TII) { 97142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineFunction::iterator MFEnd = VRM->getMachineFunction().end(); 97242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 97342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid();) { 97442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Start = I.start(); 97542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Stop = I.stop(); 97642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo = I.value(); 97742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << "\t[" << Start << ';' << Stop << "):" << LocNo); 97842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineFunction::iterator MBB = LIS.getMBBFromIndex(Start); 97942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex MBBEnd = LIS.getMBBEndIdx(MBB); 98042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 98142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd); 98242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen insertDebugValue(MBB, Start, LocNo, LIS, TII); 98342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // This interval may span multiple basic blocks. 98442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Insert a DBG_VALUE into each one. 98542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen while(Stop > MBBEnd) { 98642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Move to the next block. 98742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Start = MBBEnd; 98842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (++MBB == MFEnd) 98942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen break; 99042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MBBEnd = LIS.getMBBEndIdx(MBB); 99142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << " BB#" << MBB->getNumber() << '-' << MBBEnd); 99242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen insertDebugValue(MBB, Start, LocNo, LIS, TII); 99342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 99442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << '\n'); 99542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (MBB == MFEnd) 99642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen break; 99742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 99842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen ++I; 99942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 100042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 100142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 100242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid LDVImpl::emitDebugValues(VirtRegMap *VRM) { 100342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen DEBUG(dbgs() << "********** EMITTING LIVE DEBUG VARIABLES **********\n"); 100442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo *TII = MF->getTarget().getInstrInfo(); 100542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 1006cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen DEBUG(userValues[i]->print(dbgs(), &MF->getTarget())); 100742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->rewriteLocations(*VRM, *TRI); 100842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->emitDebugValues(VRM, *LIS, *TII); 100942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 101042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 101142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 101242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid LiveDebugVariables::emitDebugValues(VirtRegMap *VRM) { 101342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (pImpl) 101442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM); 101542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 101642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 101742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 101830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#ifndef NDEBUG 101930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LiveDebugVariables::dump() { 102030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen if (pImpl) 102130e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->print(dbgs()); 102230e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 102330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#endif 102430e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 1025