LiveDebugVariables.cpp revision 4c5e43da7792f75567b693105cc53e3f1992ad98
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 22bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "LiveDebugVariables.h" 230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/ADT/IntervalMap.h" 24ad90d3a343ca73c32693e2b05b74462ccd9659cdDevang Patel#include "llvm/ADT/Statistic.h" 25c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel#include "llvm/CodeGen/LexicalScopes.h" 26bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/LiveIntervalAnalysis.h" 270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/CodeGen/MachineDominators.h" 2842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineFunction.h" 2942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen#include "llvm/CodeGen/MachineInstrBuilder.h" 301744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen#include "llvm/CodeGen/MachineRegisterInfo.h" 31bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen#include "llvm/CodeGen/Passes.h" 321ead68d769f27f6d68d4aaeffe4199fa2cacbc95Jakob Stoklund Olesen#include "llvm/CodeGen/VirtRegMap.h" 330b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/Constants.h" 3436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines#include "llvm/IR/DebugInfo.h" 350b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/Metadata.h" 360b8c9a80f20772c3793201ab5b251d3520b9cea3Chandler Carruth#include "llvm/IR/Value.h" 370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/CommandLine.h" 380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen#include "llvm/Support/Debug.h" 394c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar#include "llvm/Support/raw_ostream.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" 4337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines#include "llvm/Target/TargetSubtargetInfo.h" 44dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#include <memory> 45dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 46bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenusing namespace llvm; 47bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 48dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines#define DEBUG_TYPE "livedebug" 49dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines 5051a666f0e50a34b74212db9c5814153c885153a5Devang Patelstatic cl::opt<bool> 5125dc2268a5aedcb5da57f065dbdb40d790b11bc0Jakob Stoklund OlesenEnableLDV("live-debug-variables", cl::init(true), 5251a666f0e50a34b74212db9c5814153c885153a5Devang Patel cl::desc("Enable the live debug variables pass"), cl::Hidden); 5351a666f0e50a34b74212db9c5814153c885153a5Devang Patel 54ad90d3a343ca73c32693e2b05b74462ccd9659cdDevang PatelSTATISTIC(NumInsertedDebugValues, "Number of DBG_VALUEs inserted"); 55bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenchar LiveDebugVariables::ID = 0; 56bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 57bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_BEGIN(LiveDebugVariables, "livedebugvars", 58bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 590613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(MachineDominatorTree) 60bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_DEPENDENCY(LiveIntervals) 61bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund OlesenINITIALIZE_PASS_END(LiveDebugVariables, "livedebugvars", 62bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen "Debug Variable Analysis", false, false) 63bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 64bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenvoid LiveDebugVariables::getAnalysisUsage(AnalysisUsage &AU) const { 650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen AU.addRequired<MachineDominatorTree>(); 66bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.addRequiredTransitive<LiveIntervals>(); 67bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen AU.setPreservesAll(); 68bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen MachineFunctionPass::getAnalysisUsage(AU); 69bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 70bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 71dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen HinesLiveDebugVariables::LiveDebugVariables() : MachineFunctionPass(ID), pImpl(nullptr) { 72bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen initializeLiveDebugVariablesPass(*PassRegistry::getPassRegistry()); 73bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 74bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen 750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LocMap - Map of where a user value is live, and its location. 760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesentypedef IntervalMap<SlotIndex, unsigned, 4> LocMap; 770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7876f58d20313a23758399a59ceec0fbc6c2c16397Benjamin Kramernamespace { 7936b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines/// UserValueScopes - Keeps track of lexical scopes associated with a 803a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel/// user value's source location. 813a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patelclass UserValueScopes { 823a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel DebugLoc DL; 833a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel LexicalScopes &LS; 843a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel SmallPtrSet<const MachineBasicBlock *, 4> LBlocks; 853a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 863a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patelpublic: 873a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes(DebugLoc D, LexicalScopes &L) : DL(D), LS(L) {} 883a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 893a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// dominates - Return true if current scope dominates at least one machine 903a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// instruction in a given machine basic block. 913a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel bool dominates(MachineBasicBlock *MBB) { 923a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (LBlocks.empty()) 933a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel LS.getMachineBasicBlocks(DL, LBlocks); 943a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (LBlocks.count(MBB) != 0 || LS.dominates(DL, MBB)) 953a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel return true; 963a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel return false; 973a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel } 983a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel}; 9976f58d20313a23758399a59ceec0fbc6c2c16397Benjamin Kramer} // end anonymous namespace 1003a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 1010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValue - A user value is a part of a debug info user variable. 1020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 1030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// A DBG_VALUE instruction notes that (a sub-register of) a virtual register 1040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// holds part of a user variable. The part is identified by a byte offset. 1050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// 1060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// UserValues are grouped into equivalence classes for easier searching. Two 1070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// user values are related if they refer to the same variable, or if they are 1080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// held by the same virtual register. The equivalence class is the transitive 1090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// closure of that relation. 1100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 1111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenclass LDVImpl; 1120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass UserValue { 11337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MDNode *Variable; ///< The debug info variable we are part of. 11437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MDNode *Expression; ///< Any complex address expression. 1150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned offset; ///< Byte offset into variable. 1163517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl bool IsIndirect; ///< true if this is a register-indirect+offset value. 117f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc dl; ///< The debug location for the variable. This is 118f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel ///< used by dwarf writer to find lexical scope. 1190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *leader; ///< Equivalence class leader. 1200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *next; ///< Next value in equivalence class, or null. 1210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Numbered locations referenced by locmap. 1230804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen SmallVector<MachineOperand, 4> locations; 1240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map of slot indices where this value is live. 1260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap locInts; 1270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1285daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// coalesceLocation - After LocNo was changed, check if it has become 1295daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// identical to another location, and coalesce them. This may cause LocNo or 1305daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen /// a later location to be erased, but no earlier location will be erased. 1315daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen void coalesceLocation(unsigned LocNo); 1325daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 13342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// insertDebugValue - Insert a DBG_VALUE into MBB at Idx for LocNo. 13442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, unsigned LocNo, 13542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TII); 13642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 137f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitLocation - Replace OldLocNo ranges with NewRegs ranges where NewRegs 138f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// is live. Returns true if any changes were made. 1391feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey bool splitLocation(unsigned OldLocNo, ArrayRef<unsigned> NewRegs, 1401feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey LiveIntervals &LIS); 141f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 1420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 1430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// UserValue - Create a new UserValue. 14437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines UserValue(const MDNode *var, const MDNode *expr, unsigned o, bool i, 14537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines DebugLoc L, LocMap::Allocator &alloc) 14637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines : Variable(var), Expression(expr), offset(o), IsIndirect(i), dl(L), 14737ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines leader(this), next(nullptr), locInts(alloc) {} 1480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLeader - Get the leader of this value's equivalence class. 1500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getLeader() { 1510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *l = leader; 1520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (l != l->leader) 1530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen l = l->leader; 1540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return leader = l; 1550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getNext - Return the next UserValue in the equivalence class. 1580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *getNext() const { return next; } 1590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 160a462d6e8ebe90f3732891b02a057a88038ac1228Devang Patel /// match - Does this UserValue match the parameters? 16137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines bool match(const MDNode *Var, const MDNode *Expr, unsigned Offset, 16237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines bool indirect) const { 16337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines return Var == Variable && Expr == Expression && Offset == offset && 16437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines indirect == IsIndirect; 1650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// merge - Merge equivalence classes. 1680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static UserValue *merge(UserValue *L1, UserValue *L2) { 1690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L2 = L2->getLeader(); 1700613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!L1) 1710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L2; 1720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1 = L1->getLeader(); 1730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (L1 == L2) 1740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Splice L2 before L1's members. 1760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *End = L2; 1770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen while (End->next) 1780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1, End = End->next; 1790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->leader = L1; 1800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen End->next = L1->next; 1810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen L1->next = L2; 1820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return L1; 1830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 1840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 1850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getLocationNo - Return the location number that matches Loc. 1860804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned getLocationNo(const MachineOperand &LocMO) { 1871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isReg()) { 1881744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.getReg() == 0) 1891744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return ~0u; 1901744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // For register locations we dont care about use/def and other flags. 1911744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1921744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 1931744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getReg() == LocMO.getReg() && 1941744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations[i].getSubReg() == LocMO.getSubReg()) 1951744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 1961744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } else 1971744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 1981744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (LocMO.isIdenticalTo(locations[i])) 1991744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return i; 2000804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.push_back(LocMO); 2010804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // We are storing a MachineOperand outside a MachineInstr. 2020804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen locations.back().clearParent(); 2031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't store def operands. 2041744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations.back().isReg()) 2051744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen locations.back().setIsUse(); 2060804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return locations.size() - 1; 2070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 2080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtRegs - Ensure that all virtual register locations are mapped. 2101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtRegs(LDVImpl *LDV); 2111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 2120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// addDef - Add a definition point to this value. 2130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void addDef(SlotIndex Idx, const MachineOperand &LocMO) { 2140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Add a singular (Idx,Idx) -> Loc mapping. 2150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 2160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!I.valid() || I.start() != Idx) 2170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), getLocationNo(LocMO)); 21879513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen else 21979513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen // A later DBG_VALUE at the same SlotIndex overrides the old location. 22079513ed8598bd5ebc25b0764961f326d34aaf388Jakob Stoklund Olesen I.setValue(getLocationNo(LocMO)); 2210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 2220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// extendDef - Extend the current definition as far as possible down the 2240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// dominator tree. Stop when meeting an existing def or when leaving the live 2250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// range of VNI. 2261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// End points where VNI is no longer live are added to Kills. 2270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Starting point for the definition. 2280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LocNo Location number to propagate. 2294f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun /// @param LR Restrict liveness to where LR has the value VNI. May be null. 2304f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun /// @param VNI When LR is not null, this is the value to restrict to. 2311744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Append end points of VNI's live range to Kills. 2320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param LIS Live intervals analysis. 2330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MDT Dominator tree. 2340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void extendDef(SlotIndex Idx, unsigned LocNo, 2354f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun LiveRange *LR, const VNInfo *VNI, 2361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 237c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 238b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS); 2390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2401744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// addDefsFromCopies - The value in LI/LocNo may be copies to other 2411744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// registers. Determine if any of the copies are available at the kill 2421744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// points, and add defs if possible. 2431744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LI Scan for copies of the value in LI->reg. 2441744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param LocNo Location number of LI->reg. 2451744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param Kills Points where the range of LocNo could be extended. 2461744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// @param NewDefs Append (Idx, LocNo) of inserted defs here. 2471744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 2481744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 2491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 2501744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, 2511744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS); 2521744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 2530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all locations after 2540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 255e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen void computeIntervals(MachineRegisterInfo &MRI, const TargetRegisterInfo &TRI, 256c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 2573a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes &UVS); 2580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 259f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace OldReg ranges with NewRegs ranges where NewRegs is 260f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// live. Returns true if any changes were made. 2611feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey bool splitRegister(unsigned OldLocNo, ArrayRef<unsigned> NewRegs, 2621feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey LiveIntervals &LIS); 263f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 26442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// rewriteLocations - Rewrite virtual register locations according to the 26542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen /// provided virtual register map. 26642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI); 26742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 268b3cecdfcf9a0b736d3c0f6f5abffb41ecda3577cEric Christopher /// emitDebugValues - Recreate DBG_VALUE instruction from data structures. 26942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM, 27042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, const TargetInstrInfo &TRI); 27142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 272f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// findDebugLoc - Return DebugLoc used for this DBG_VALUE instruction. A 27337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines /// variable may have more than one corresponding DBG_VALUE instructions. 274f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// Only first one needs DebugLoc to identify variable's lexical scope 275f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel /// in source file. 276f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc findDebugLoc(); 2773a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel 2783a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel /// getDebugLoc - Return DebugLoc of this UserValue. 2793a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel DebugLoc getDebugLoc() { return dl;} 2804c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar void print(raw_ostream &, const TargetRegisterInfo *); 2810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 2820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 2830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 2840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen/// LDVImpl - Implementation of the LiveDebugVariables pass. 2850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesennamespace { 2860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenclass LDVImpl { 2870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveDebugVariables &pass; 2880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LocMap::Allocator allocator; 2890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineFunction *MF; 2900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LiveIntervals *LIS; 291c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LexicalScopes LS; 2920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineDominatorTree *MDT; 2930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const TargetRegisterInfo *TRI; 2940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 295f098620095727dd2a823a94a3a8d47108361ad83Manman Ren /// Whether emitDebugValues is called. 296f098620095727dd2a823a94a3a8d47108361ad83Manman Ren bool EmitDone; 297f098620095727dd2a823a94a3a8d47108361ad83Manman Ren /// Whether the machine function is modified during the pass. 298f098620095727dd2a823a94a3a8d47108361ad83Manman Ren bool ModifiedMF; 299f098620095727dd2a823a94a3a8d47108361ad83Manman Ren 3000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// userValues - All allocated UserValue instances. 301dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines SmallVector<std::unique_ptr<UserValue>, 8> userValues; 3020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map virtual register to eq class leader. 3040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<unsigned, UserValue*> VRMap; 3056ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen VRMap virtRegToEqClass; 3060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// Map user variable to eq class leader. 3080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen typedef DenseMap<const MDNode *, UserValue*> UVMap; 3090613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UVMap userVarMap; 3100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3110613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// getUserValue - Find or create a UserValue. 31237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines UserValue *getUserValue(const MDNode *Var, const MDNode *Expr, 31337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines unsigned Offset, bool IsIndirect, DebugLoc DL); 3140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 31530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen /// lookupVirtReg - Find the EC leader for VirtReg or null. 31630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen UserValue *lookupVirtReg(unsigned VirtReg); 31730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 3180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// handleDebugValue - Add DBG_VALUE instruction to our maps. 3190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param MI DBG_VALUE instruction 3200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param Idx Last valid SLotIndex before instruction. 3210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if the DBG_VALUE instruction should be deleted. 3220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool handleDebugValue(MachineInstr *MI, SlotIndex Idx); 3230613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3240613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collectDebugValues - Collect and erase all DBG_VALUE instructions, adding 3250613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// a UserValue def for each instruction. 3260613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @param mf MachineFunction to be scanned. 3270613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// @return True if any debug values were found. 3280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool collectDebugValues(MachineFunction &mf); 3290613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3300613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// computeIntervals - Compute the live intervals of all user values after 3310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen /// collecting all their def points. 3320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void computeIntervals(); 3330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenpublic: 335c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines LDVImpl(LiveDebugVariables *ps) 336c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines : pass(*ps), MF(nullptr), EmitDone(false), ModifiedMF(false) {} 3370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool runOnMachineFunction(MachineFunction &mf); 3380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 339f098620095727dd2a823a94a3a8d47108361ad83Manman Ren /// clear - Release all memory. 3400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void clear() { 341c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines MF = nullptr; 3420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userValues.clear(); 3436ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen virtRegToEqClass.clear(); 3440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen userVarMap.clear(); 345f098620095727dd2a823a94a3a8d47108361ad83Manman Ren // Make sure we call emitDebugValues if the machine function was modified. 346f098620095727dd2a823a94a3a8d47108361ad83Manman Ren assert((!ModifiedMF || EmitDone) && 347f098620095727dd2a823a94a3a8d47108361ad83Manman Ren "Dbg values are not emitted in LDV"); 348f098620095727dd2a823a94a3a8d47108361ad83Manman Ren EmitDone = false; 349f098620095727dd2a823a94a3a8d47108361ad83Manman Ren ModifiedMF = false; 35037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines LS.reset(); 3510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 3520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3531744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen /// mapVirtReg - Map virtual register to an equivalence class. 3541744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen void mapVirtReg(unsigned VirtReg, UserValue *EC); 3551744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 356f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen /// splitRegister - Replace all references to OldReg with NewRegs. 3571feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey void splitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs); 358f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 359b3cecdfcf9a0b736d3c0f6f5abffb41ecda3577cEric Christopher /// emitDebugValues - Recreate DBG_VALUE instruction from data structures. 36042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen void emitDebugValues(VirtRegMap *VRM); 36142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 3620613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen void print(raw_ostream&); 3630613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen}; 3640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} // namespace 3650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3664c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainarvoid UserValue::print(raw_ostream &OS, const TargetRegisterInfo *TRI) { 36737ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines DIVariable DV(Variable); 36837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines OS << "!\""; 369a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel DV.printExtendedName(OS); 370a2b552d0aec83b1d030b878a130c8fefafe4d3c3Devang Patel OS << "\"\t"; 3710613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (offset) 3720613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '+' << offset; 3730613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) { 3740613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << " [" << I.start() << ';' << I.stop() << "):"; 3750613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 3760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "undef"; 3770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 3780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << I.value(); 3790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 380e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) { 381e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen OS << " Loc" << i << '='; 3824c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar locations[i].print(OS, TRI); 383e77150bbcbf1f53b3830904be4d243c618c00b14Jakob Stoklund Olesen } 3840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << '\n'; 3850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::print(raw_ostream &OS) { 3880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen OS << "********** DEBUG VARIABLES **********\n"; 3890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) 3904c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar userValues[i]->print(OS, TRI); 3910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 3920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 3935daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesenvoid UserValue::coalesceLocation(unsigned LocNo) { 3940804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned KeepLoc = 0; 3950804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen for (unsigned e = locations.size(); KeepLoc != e; ++KeepLoc) { 3960804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == LocNo) 3970804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen continue; 3980804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (locations[KeepLoc].isIdenticalTo(locations[LocNo])) 3990804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen break; 4005daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 4010804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // No matches. 4020804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc == locations.size()) 4030804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen return; 4040804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen 4050804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen // Keep the smaller location, erase the larger one. 4060804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned EraseLoc = LocNo; 4070804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (KeepLoc > EraseLoc) 4080804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen std::swap(KeepLoc, EraseLoc); 4095daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen locations.erase(locations.begin() + EraseLoc); 4105daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 4115daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen // Rewrite values. 4125daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid(); ++I) { 4135daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen unsigned v = I.value(); 4145daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen if (v == EraseLoc) 4155daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValue(KeepLoc); // Coalesce when possible. 4165daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen else if (v > EraseLoc) 4175daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen I.setValueUnchecked(v-1); // Avoid coalescing with untransformed values. 4185daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen } 4195daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen} 4205daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen 4211744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid UserValue::mapVirtRegs(LDVImpl *LDV) { 4221744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = locations.size(); i != e; ++i) 4231744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (locations[i].isReg() && 4241744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen TargetRegisterInfo::isVirtualRegister(locations[i].getReg())) 4251744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LDV->mapVirtReg(locations[i].getReg(), this); 4261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 4271744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 42837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen HinesUserValue *LDVImpl::getUserValue(const MDNode *Var, const MDNode *Expr, 42937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines unsigned Offset, bool IsIndirect, 43037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines DebugLoc DL) { 4310613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *&Leader = userVarMap[Var]; 4320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Leader) { 4330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UserValue *UV = Leader->getLeader(); 4340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UV; 4350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (; UV; UV = UV->getNext()) 43637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (UV->match(Var, Expr, Offset, IsIndirect)) 4370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 4380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 440dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines userValues.push_back( 44137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines make_unique<UserValue>(Var, Expr, Offset, IsIndirect, DL, allocator)); 442dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines UserValue *UV = userValues.back().get(); 4430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, UV); 4440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return UV; 4450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::mapVirtReg(unsigned VirtReg, UserValue *EC) { 4480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen assert(TargetRegisterInfo::isVirtualRegister(VirtReg) && "Only map VirtRegs"); 4496ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen UserValue *&Leader = virtRegToEqClass[VirtReg]; 4500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Leader = UserValue::merge(Leader, EC); 4510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 45330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund OlesenUserValue *LDVImpl::lookupVirtReg(unsigned VirtReg) { 4546ed4c6af97db8b2bbfd6b54dd2a58f16cf0c592bJakob Stoklund Olesen if (UserValue *UV = virtRegToEqClass.lookup(VirtReg)) 45530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen return UV->getLeader(); 456dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines return nullptr; 45730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 45830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 4590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::handleDebugValue(MachineInstr *MI, SlotIndex Idx) { 4600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE loc, offset, variable 46137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (MI->getNumOperands() != 4 || 4623517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl !(MI->getOperand(1).isReg() || MI->getOperand(1).isImm()) || 4633517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl !MI->getOperand(2).isMetadata()) { 4640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "Can't handle " << *MI); 4650613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return false; 4660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Get or create the UserValue for (variable,offset). 469818833f27929d650b4323774cd3660860588f687Adrian Prantl bool IsIndirect = MI->isIndirectDebugValue(); 4703517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl unsigned Offset = IsIndirect ? MI->getOperand(1).getImm() : 0; 47137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MDNode *Var = MI->getDebugVariable(); 47237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const MDNode *Expr = MI->getDebugExpression(); 473818833f27929d650b4323774cd3660860588f687Adrian Prantl //here. 47437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines UserValue *UV = 47537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines getUserValue(Var, Expr, Offset, IsIndirect, MI->getDebugLoc()); 4760613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen UV->addDef(Idx, MI->getOperand(0)); 4770613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return true; 4780613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 4790613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 4800613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::collectDebugValues(MachineFunction &mf) { 4810613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = false; 4820613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineFunction::iterator MFI = mf.begin(), MFE = mf.end(); MFI != MFE; 4830613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MFI) { 4840613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = MFI; 4850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (MachineBasicBlock::iterator MBBI = MBB->begin(), MBBE = MBB->end(); 4860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI != MBBE;) { 4870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!MBBI->isDebugValue()) { 4880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 4890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 4900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 4910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // DBG_VALUE has no slot index, use the previous instruction instead. 4920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = MBBI == MBB->begin() ? 4930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS->getMBBStartIdx(MBB) : 49436b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines LIS->getInstructionIndex(std::prev(MBBI)).getRegSlot(); 4950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Handle consecutive DBG_VALUE instructions with the same slot index. 4960613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 4970613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (handleDebugValue(MBBI, Idx)) { 4980613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MBBI = MBB->erase(MBBI); 4990613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Changed = true; 5000613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } else 5010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++MBBI; 5020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (MBBI != MBBE && MBBI->isDebugValue()); 5030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5040613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 5060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 5070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5080613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid UserValue::extendDef(SlotIndex Idx, unsigned LocNo, 5094f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun LiveRange *LR, const VNInfo *VNI, 5101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<SlotIndex> *Kills, 511c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LiveIntervals &LIS, MachineDominatorTree &MDT, 512b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS) { 5130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<SlotIndex, 16> Todo; 5140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Todo.push_back(Idx); 5150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen do { 5160613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Start = Todo.pop_back_val(); 5170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MachineBasicBlock *MBB = LIS.getMBBFromIndex(Start); 5180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Stop = LIS.getMBBEndIdx(MBB); 51912a40314a91511b65bc83782fd5a3e981331adb1Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Start); 5200613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5210613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limit to VNI's live range. 5220613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool ToEnd = true; 5234f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun if (LR && VNI) { 5244f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun LiveInterval::Segment *Segment = LR->getSegmentContaining(Start); 525331de11a0acc6a095b98914b5f05ff242c9d7819Matthias Braun if (!Segment || Segment->valno != VNI) { 5261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills) 5271744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Start); 5280613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5291744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 530331de11a0acc6a095b98914b5f05ff242c9d7819Matthias Braun if (Segment->end < Stop) 531331de11a0acc6a095b98914b5f05ff242c9d7819Matthias Braun Stop = Segment->end, ToEnd = false; 5320613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5330613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5340613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // There could already be a short def at Start. 5350613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() <= Start) { 5360613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Stop when meeting a different location or an already extended interval. 5370613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Start = Start.getNextSlot(); 5380613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != LocNo || I.stop() != Start) 5390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // This is a one-slot placeholder. Just skip it. 5410613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 5420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 5430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Limited by the next def. 5450613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.valid() && I.start() < Stop) 5460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Stop = I.start(), ToEnd = false; 5471744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Limited by VNI's live range. 5481744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen else if (!ToEnd && Kills) 5491744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen Kills->push_back(Stop); 5500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (Start >= Stop) 5520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5530613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5540613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.insert(Start, Stop, LocNo); 5550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // If we extended to the MBB end, propagate down the dominator tree. 5570613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!ToEnd) 5580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen continue; 5590613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen const std::vector<MachineDomTreeNode*> &Children = 5600613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT.getNode(MBB)->getChildren(); 561c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel for (unsigned i = 0, e = Children.size(); i != e; ++i) { 562c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel MachineBasicBlock *MBB = Children[i]->getBlock(); 5633a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel if (UVS.dominates(MBB)) 564c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel Todo.push_back(LIS.getMBBStartIdx(MBB)); 565c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel } 5660613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } while (!Todo.empty()); 5670613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 5680613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 5690613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid 5701744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::addDefsFromCopies(LiveInterval *LI, unsigned LocNo, 5711744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const SmallVectorImpl<SlotIndex> &Kills, 5721744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVectorImpl<std::pair<SlotIndex, unsigned> > &NewDefs, 5731744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineRegisterInfo &MRI, LiveIntervals &LIS) { 5741744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (Kills.empty()) 5751744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5761744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Don't track copies from physregs, there are too many uses. 5771744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(LI->reg)) 5781744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 5791744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 5801744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Collect all the (vreg, valno) pairs that are copies of LI. 5811744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<std::pair<LiveInterval*, const VNInfo*>, 8> CopyValues; 58236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines for (MachineOperand &MO : MRI.use_nodbg_operands(LI->reg)) { 58336b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines MachineInstr *MI = MO.getParent(); 5841744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Copies of the full value. 58536b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines if (MO.getSubReg() || !MI->isCopy()) 5861744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 5871744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned DstReg = MI->getOperand(0).getReg(); 5881744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 58928cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // Don't follow copies to physregs. These are usually setting up call 59028cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // arguments, and the argument registers are always call clobbered. We are 59128cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // better off in the source register which could be a callee-saved register, 59228cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen // or it could be spilled. 59328cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen if (!TargetRegisterInfo::isVirtualRegister(DstReg)) 59428cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen continue; 59528cf1156c93afabedc69fe7b73aa92ce85e323a5Jakob Stoklund Olesen 5961744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Is LocNo extended to reach this copy? If not, another def may be blocking 5971744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // it, or we are looking at a wrong value of LI. 5981744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = LIS.getInstructionIndex(MI); 5992debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx.getRegSlot(true)); 6001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!I.valid() || I.value() != LocNo) 6011744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6021744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6031744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (!LIS.hasInterval(DstReg)) 6041744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6051744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = &LIS.getInterval(DstReg); 6062debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen const VNInfo *DstVNI = DstLI->getVNInfoAt(Idx.getRegSlot()); 6072debd48ca790ac01be6e12e094fdf4fdcadc8364Jakob Stoklund Olesen assert(DstVNI && DstVNI->def == Idx.getRegSlot() && "Bad copy value"); 6081744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen CopyValues.push_back(std::make_pair(DstLI, DstVNI)); 6091744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6101744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6111744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (CopyValues.empty()) 6121744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen return; 6131744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6141744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Got " << CopyValues.size() << " copies of " << *LI << '\n'); 6151744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6161744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Try to add defs of the copied values for each kill point. 6171744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = Kills.size(); i != e; ++i) { 6181744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SlotIndex Idx = Kills[i]; 6191744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned j = 0, e = CopyValues.size(); j != e; ++j) { 6201744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveInterval *DstLI = CopyValues[j].first; 6211744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen const VNInfo *DstVNI = CopyValues[j].second; 6221744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (DstLI->getVNInfoAt(Idx) != DstVNI) 6231744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6241744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Check that there isn't already a def at Idx 6251744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LocMap::iterator I = locInts.find(Idx); 6261744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen if (I.valid() && I.start() <= Idx) 6271744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen continue; 6281744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen DEBUG(dbgs() << "Kill at " << Idx << " covered by valno #" 6291744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen << DstVNI->id << " in " << *DstLI << '\n'); 6301744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen MachineInstr *CopyMI = LIS.getInstructionFromIndex(DstVNI->def); 6311744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen assert(CopyMI && CopyMI->isCopy() && "Bad copy value"); 6321744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen unsigned LocNo = getLocationNo(CopyMI->getOperand(0)); 6331744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen I.insert(Idx, Idx.getNextSlot(), LocNo); 6341744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen NewDefs.push_back(std::make_pair(Idx, LocNo)); 6351744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen break; 6361744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6371744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 6381744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen} 6391744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen 6401744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesenvoid 6411744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund OlesenUserValue::computeIntervals(MachineRegisterInfo &MRI, 642e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen const TargetRegisterInfo &TRI, 6431744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen LiveIntervals &LIS, 644c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel MachineDominatorTree &MDT, 645b82062f65265666690270f3358b0d0f508d3fbbaEric Christopher UserValueScopes &UVS) { 6460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SmallVector<std::pair<SlotIndex, unsigned>, 16> Defs; 6470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Collect all defs to be extended (Skipping undefs). 6490613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::const_iterator I = locInts.begin(); I.valid(); ++I) 6500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() != ~0u) 6510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen Defs.push_back(std::make_pair(I.start(), I.value())); 6520613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6531744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen // Extend all defs, and possibly add new ones along the way. 6541744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0; i != Defs.size(); ++i) { 6550613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen SlotIndex Idx = Defs[i].first; 6560613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen unsigned LocNo = Defs[i].second; 6570804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen const MachineOperand &Loc = locations[LocNo]; 6580613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 659e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen if (!Loc.isReg()) { 660dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines extendDef(Idx, LocNo, nullptr, nullptr, nullptr, LIS, MDT, UVS); 661e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen continue; 662e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen } 663e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen 6640613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Register locations are constrained to where the register value is live. 665e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen if (TargetRegisterInfo::isVirtualRegister(Loc.getReg())) { 666dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines LiveInterval *LI = nullptr; 667dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines const VNInfo *VNI = nullptr; 668b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen if (LIS.hasInterval(Loc.getReg())) { 669b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen LI = &LIS.getInterval(Loc.getReg()); 670b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen VNI = LI->getVNInfoAt(Idx); 671b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen } 6721744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen SmallVector<SlotIndex, 16> Kills; 6733a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel extendDef(Idx, LocNo, LI, VNI, &Kills, LIS, MDT, UVS); 674b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen if (LI) 675b150930910a254377a62ed74af981c37eafe8fcbJakob Stoklund Olesen addDefsFromCopies(LI, LocNo, Kills, Defs, MRI, LIS); 676e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen continue; 677e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen } 678e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen 679e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen // For physregs, use the live range of the first regunit as a guide. 680e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen unsigned Unit = *MCRegUnitIterator(Loc.getReg(), &TRI); 6814f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun LiveRange *LR = &LIS.getRegUnit(Unit); 6824f3b5e8c9232e43d1291aab8db5f5698d7ee0ea4Matthias Braun const VNInfo *VNI = LR->getVNInfoAt(Idx); 683e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen // Don't track copies from physregs, it is too expensive. 684dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines extendDef(Idx, LocNo, LR, VNI, nullptr, LIS, MDT, UVS); 6850613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen } 6860613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6870613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen // Finally, erase all the undefs. 6880613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen for (LocMap::iterator I = locInts.begin(); I.valid();) 6890613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (I.value() == ~0u) 6900613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen I.erase(); 6910613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen else 6920613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen ++I; 6930613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 6940613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 6950613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LDVImpl::computeIntervals() { 6961744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 6973a2d80df88c28dc8b2d3a855c3ebd7935c8ad125Devang Patel UserValueScopes UVS(userValues[i]->getDebugLoc(), LS); 698e8a0a1286417e73f4b2bffe21ae45882701e703fJakob Stoklund Olesen userValues[i]->computeIntervals(MF->getRegInfo(), *TRI, *LIS, *MDT, UVS); 6991744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen userValues[i]->mapVirtRegs(this); 7001744e476ec3df0350a1163bf2c6439ea21aefbbaJakob Stoklund Olesen } 7010613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7020613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7030613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenbool LDVImpl::runOnMachineFunction(MachineFunction &mf) { 704c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines clear(); 7050613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MF = &mf; 7060613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen LIS = &pass.getAnalysis<LiveIntervals>(); 7070613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen MDT = &pass.getAnalysis<MachineDominatorTree>(); 70837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines TRI = mf.getSubtarget().getRegisterInfo(); 709c722c3d5ffd4ad07e17f81c2b2eb7f8074559600Devang Patel LS.initialize(mf); 7100613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(dbgs() << "********** COMPUTING LIVE DEBUG VARIABLES: " 711986d76d7b3844b9a2f3d01a48975952749267a93David Blaikie << mf.getName() << " **********\n"); 7120613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7130613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen bool Changed = collectDebugValues(mf); 7140613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen computeIntervals(); 7150613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen DEBUG(print(dbgs())); 716f098620095727dd2a823a94a3a8d47108361ad83Manman Ren ModifiedMF = Changed; 7170613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen return Changed; 7180613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7190613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 72037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hinesstatic void removeDebugValues(MachineFunction &mf) { 72137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines for (MachineBasicBlock &MBB : mf) { 72237ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines for (auto MBBI = MBB.begin(), MBBE = MBB.end(); MBBI != MBBE; ) { 72337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (!MBBI->isDebugValue()) { 72437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines ++MBBI; 72537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines continue; 72637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines } 72737ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines MBBI = MBB.erase(MBBI); 72837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines } 72937ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines } 73037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines} 73137ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines 732bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesenbool LiveDebugVariables::runOnMachineFunction(MachineFunction &mf) { 73351a666f0e50a34b74212db9c5814153c885153a5Devang Patel if (!EnableLDV) 73451a666f0e50a34b74212db9c5814153c885153a5Devang Patel return false; 73537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines if (!FunctionDIs.count(mf.getFunction())) { 73637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines removeDebugValues(mf); 737c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines return false; 73837ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines } 7390613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (!pImpl) 7400613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen pImpl = new LDVImpl(this); 741f098620095727dd2a823a94a3a8d47108361ad83Manman Ren return static_cast<LDVImpl*>(pImpl)->runOnMachineFunction(mf); 7420613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7430613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7440613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesenvoid LiveDebugVariables::releaseMemory() { 745f098620095727dd2a823a94a3a8d47108361ad83Manman Ren if (pImpl) 7460613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->clear(); 7470613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen} 7480613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen 7490613516b16466a92c68d60734801221506c85e86Jakob Stoklund OlesenLiveDebugVariables::~LiveDebugVariables() { 7500613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen if (pImpl) 7510613516b16466a92c68d60734801221506c85e86Jakob Stoklund Olesen delete static_cast<LDVImpl*>(pImpl); 752bb7b23f5b79a7ca2aa62faa1a6078428af597234Jakob Stoklund Olesen} 75330e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen 754f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 755f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen// Live Range Splitting 756f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen//===----------------------------------------------------------------------===// 757f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 758f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 7591feb5854aeeda897e9318c8193d187673c8576b8Mark LaceyUserValue::splitLocation(unsigned OldLocNo, ArrayRef<unsigned> NewRegs, 7601feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey LiveIntervals& LIS) { 761f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG({ 762f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen dbgs() << "Splitting Loc" << OldLocNo << '\t'; 763dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines print(dbgs(), nullptr); 764f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen }); 765f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 766f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMap::iterator LocMapI; 767f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setMap(locInts); 768f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) { 7691feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey LiveInterval *LI = &LIS.getInterval(NewRegs[i]); 770f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LI->empty()) 771f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 772f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 773f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Don't allocate the new LocNo until it is needed. 774f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned NewLocNo = ~0u; 775f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 776f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Iterate over the overlaps between locInts and LI. 777f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.find(LI->beginIndex()); 778f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 779f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 780f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LII = LI->advanceTo(LI->begin(), LocMapI.start()); 781f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LiveInterval::iterator LIE = LI->end(); 782f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid() && LII != LIE) { 783f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // At this point, we know that LocMapI.stop() > LII->start. 784f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 785f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII == LIE) 786f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 787f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 788f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Now LII->end > LocMapI.start(). Do we have an overlap? 789f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LocMapI.value() == OldLocNo && LII->start < LocMapI.stop()) { 790f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Overlapping correct location. Allocate NewLocNo now. 791f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (NewLocNo == ~0u) { 792f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MachineOperand MO = MachineOperand::CreateReg(LI->reg, false); 793f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen MO.setSubReg(locations[OldLocNo].getSubReg()); 794f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen NewLocNo = getLocationNo(MO); 795f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DidChange = true; 796f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 797f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 798f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStart = LocMapI.start(); 799f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen SlotIndex LStop = LocMapI.stop(); 800f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 801f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Trim LocMapI down to the LII overlap. 802f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LII->start) 803f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStartUnchecked(LII->start); 804f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LII->end) 805f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setStopUnchecked(LII->end); 806f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 807f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Change the value in the overlap. This may trigger coalescing. 808f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValue(NewLocNo); 809f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 810f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Re-insert any removed OldLocNo ranges. 811f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStart < LocMapI.start()) { 812f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LStart, LocMapI.start(), OldLocNo); 813f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 814f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen assert(LocMapI.valid() && "Unexpected coalescing"); 815f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 816f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LStop > LocMapI.stop()) { 817f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 818f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.insert(LII->end, LStop, OldLocNo); 819f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen --LocMapI; 820f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 821f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 822f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 823f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Advance to the next overlap. 824f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (LII->end < LocMapI.stop()) { 825f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (++LII == LIE) 826f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 827f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.advanceTo(LII->start); 828f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 829f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 830f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!LocMapI.valid()) 831f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen break; 832f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LII = LI->advanceTo(LII, LocMapI.start()); 833f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 834f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 835f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 836f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 837f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Finally, remove any remaining OldLocNo intervals and OldLocNo itself. 838f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen locations.erase(locations.begin() + OldLocNo); 839f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.goToBegin(); 840f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen while (LocMapI.valid()) { 841f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen unsigned v = LocMapI.value(); 842f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v == OldLocNo) { 843f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen DEBUG(dbgs() << "Erasing [" << LocMapI.start() << ';' 844f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen << LocMapI.stop() << ")\n"); 845f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.erase(); 846f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } else { 847f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (v > OldLocNo) 848f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen LocMapI.setValueUnchecked(v-1); 849f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen ++LocMapI; 850f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 851f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 852f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 853dce4a407a24b04eebc6a376f8e62b41aaa7b071fStephen Hines DEBUG({dbgs() << "Split result: \t"; print(dbgs(), nullptr);}); 854f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 855f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 856f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 857f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenbool 8581feb5854aeeda897e9318c8193d187673c8576b8Mark LaceyUserValue::splitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs, 8591feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey LiveIntervals &LIS) { 860f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 8616212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen // Split locations referring to OldReg. Iterate backwards so splitLocation can 8627cc5177d460333ca9a2f3c0783dd0d0490456867Eric Christopher // safely erase unused locations. 8636212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 8646212f9a304d7f8061c87920d39bddbc19afecb0cJakob Stoklund Olesen unsigned LocNo = i-1; 865f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen const MachineOperand *Loc = &locations[LocNo]; 866f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!Loc->isReg() || Loc->getReg() != OldReg) 867f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen continue; 8681feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey DidChange |= splitLocation(LocNo, NewRegs, LIS); 869f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen } 870f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return DidChange; 871f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 872f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 8731feb5854aeeda897e9318c8193d187673c8576b8Mark Laceyvoid LDVImpl::splitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs) { 874f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen bool DidChange = false; 875f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (UserValue *UV = lookupVirtReg(OldReg); UV; UV = UV->getNext()) 8761feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey DidChange |= UV->splitRegister(OldReg, NewRegs, *LIS); 877f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 878f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (!DidChange) 879f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen return; 880f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 881f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen // Map all of the new virtual registers. 882f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen UserValue *UV = lookupVirtReg(OldReg); 883f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen for (unsigned i = 0; i != NewRegs.size(); ++i) 8841feb5854aeeda897e9318c8193d187673c8576b8Mark Lacey mapVirtReg(NewRegs[i], UV); 885f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 886f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 887f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesenvoid LiveDebugVariables:: 8881feb5854aeeda897e9318c8193d187673c8576b8Mark LaceysplitRegister(unsigned OldReg, ArrayRef<unsigned> NewRegs, LiveIntervals &LIS) { 889f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen if (pImpl) 890f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->splitRegister(OldReg, NewRegs); 891f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen} 892f42b66169d75301346e3685fd2b3e45e47806367Jakob Stoklund Olesen 89342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid 89442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund OlesenUserValue::rewriteLocations(VirtRegMap &VRM, const TargetRegisterInfo &TRI) { 89542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Iterate over locations in reverse makes it easier to handle coalescing. 89642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = locations.size(); i ; --i) { 89742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo = i-1; 8980804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 89942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Only virtual registers are rewritten. 9000804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen if (!Loc.isReg() || !Loc.getReg() || 9010804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen !TargetRegisterInfo::isVirtualRegister(Loc.getReg())) 90242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen continue; 9030804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen unsigned VirtReg = Loc.getReg(); 904f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen if (VRM.isAssignedReg(VirtReg) && 905f203627f21614cbef9526aa791b3e7b0493d1e41Jakob Stoklund Olesen TargetRegisterInfo::isPhysicalRegister(VRM.getPhys(VirtReg))) { 906cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // This can create a %noreg operand in rare cases when the sub-register 907cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // index is no longer available. That means the user value is in a 908cf724f078623e786fc92335fdb0ec70b46f2e86dJakob Stoklund Olesen // non-existent sub-register, and %noreg is exactly what we want. 9090804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.substPhysReg(VRM.getPhys(VirtReg), TRI); 910cb39064e7aee2273da1d00e6b800db84ddc34b6bJakob Stoklund Olesen } else if (VRM.getStackSlot(VirtReg) != VirtRegMap::NO_STACK_SLOT) { 91142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // FIXME: Translate SubIdx to a stackslot offset. 9120804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc = MachineOperand::CreateFI(VRM.getStackSlot(VirtReg)); 91342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } else { 9140804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setReg(0); 9150804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen Loc.setSubReg(0); 91642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 9175daec2215bdb6f484956362d81e5923bb2bffd58Jakob Stoklund Olesen coalesceLocation(LocNo); 91842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 91942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 92042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 921f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel/// findInsertLocation - Find an iterator for inserting a DBG_VALUE 92242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen/// instruction. 92342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenstatic MachineBasicBlock::iterator 924f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelfindInsertLocation(MachineBasicBlock *MBB, SlotIndex Idx, 92542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS) { 92642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen SlotIndex Start = LIS.getMBBStartIdx(MBB); 92742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getBaseIndex(); 92842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 92942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // Try to find an insert location by going backwards from Idx. 93042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineInstr *MI; 93142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen while (!(MI = LIS.getInstructionFromIndex(Idx))) { 93242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen // We've reached the beginning of MBB. 93342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen if (Idx == Start) { 93442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen MachineBasicBlock::iterator I = MBB->SkipPHIsAndLabels(MBB->begin()); 93542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen return I; 93642acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 93742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen Idx = Idx.getPrevIndex(); 93842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 939f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel 940eea666f216ad3a8f8cd88a969176f86add7228f3Jakob Stoklund Olesen // Don't insert anything after the first terminator, though. 9415a96b3dad2f634c9081c8b2b6c2575441dc5a2bdEvan Cheng return MI->isTerminator() ? MBB->getFirstTerminator() : 94236b56886974eae4f9c5ebc96befd3e7bfe5de338Stephen Hines std::next(MachineBasicBlock::iterator(MI)); 94342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 94442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 945f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang PatelDebugLoc UserValue::findDebugLoc() { 946f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel DebugLoc D = dl; 947f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel dl = DebugLoc(); 948f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel return D; 949f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel} 95042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid UserValue::insertDebugValue(MachineBasicBlock *MBB, SlotIndex Idx, 95142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen unsigned LocNo, 95242acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen LiveIntervals &LIS, 95342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen const TargetInstrInfo &TII) { 954f827cd717b63fd3f1d9ad16e69087c65e9af8c82Devang Patel MachineBasicBlock::iterator I = findInsertLocation(MBB, Idx, LIS); 9550804ead404d694b35e9c55ccbf43f99cd394e487Jakob Stoklund Olesen MachineOperand &Loc = locations[LocNo]; 956d9f3fc7faaa7686af3e1a004d86397da9c8e0449Devang Patel ++NumInsertedDebugValues; 95742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 9583517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl if (Loc.isReg()) 9593517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE), 96037ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines IsIndirect, Loc.getReg(), offset, Variable, Expression); 9613517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl else 9623517640443f0b5224e2a6414c246ac60016ee9d4Adrian Prantl BuildMI(*MBB, I, findDebugLoc(), TII.get(TargetOpcode::DBG_VALUE)) 96337ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines .addOperand(Loc) 96437ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines .addImm(offset) 96537ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines .addMetadata(Variable) 96637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines .addMetadata(Expression); 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"); 1004c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines if (!MF) 1005c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines return; 100637ed9c199ca639565f6ce88105f9e39e898d82d0Stephen Hines const TargetInstrInfo *TII = MF->getSubtarget().getInstrInfo(); 100742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen for (unsigned i = 0, e = userValues.size(); i != e; ++i) { 10084c5e43da7792f75567b693105cc53e3f1992ad98Pirama Arumuga Nainar DEBUG(userValues[i]->print(dbgs(), TRI)); 100942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->rewriteLocations(*VRM, *TRI); 101042acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen userValues[i]->emitDebugValues(VRM, *LIS, *TII); 101142acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen } 1012f098620095727dd2a823a94a3a8d47108361ad83Manman Ren EmitDone = true; 101342acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 101442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 101542acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesenvoid LiveDebugVariables::emitDebugValues(VirtRegMap *VRM) { 1016f098620095727dd2a823a94a3a8d47108361ad83Manman Ren if (pImpl) 101742acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->emitDebugValues(VRM); 101842acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen} 101942acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 1020c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hinesbool LiveDebugVariables::doInitialization(Module &M) { 1021c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines FunctionDIs = makeSubprogramMap(M); 1022c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines return Pass::doInitialization(M); 1023c6a4f5e819217e1e12c458aed8e7b122e23a3a58Stephen Hines} 102442acf069c9e46395a2fa230ed6b89b402828e3d5Jakob Stoklund Olesen 102530e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#ifndef NDEBUG 102630e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesenvoid LiveDebugVariables::dump() { 102730e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen if (pImpl) 102830e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen static_cast<LDVImpl*>(pImpl)->print(dbgs()); 102930e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen} 103030e2128a731e5a0bcac45a6a79a03bdedce68a0aJakob Stoklund Olesen#endif 1031