[llvm-commits] [llvm] r137246 - in /llvm/trunk/lib/CodeGen/AsmPrinter: DwarfDebug.cpp DwarfDebug.h
Devang Patel
dpatel at apple.com
Wed Aug 10 13:55:28 PDT 2011
Author: dpatel
Date: Wed Aug 10 15:55:27 2011
New Revision: 137246
URL: http://llvm.org/viewvc/llvm-project?rev=137246&view=rev
Log:
Start using LexicalScopes utility. No intetional functionality change.
Modified:
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp?rev=137246&r1=137245&r2=137246&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Wed Aug 10 15:55:27 2011
@@ -45,9 +45,6 @@
#include "llvm/Support/Path.h"
using namespace llvm;
-static cl::opt<bool> PrintDbgScope("print-dbgscope", cl::Hidden,
- cl::desc("Print DbgScope information for each machine instruction"));
-
static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print",
cl::Hidden,
cl::desc("Disable debug info printing"));
@@ -120,143 +117,12 @@
return Ty;
}
-//===----------------------------------------------------------------------===//
-/// DbgRange - This is used to track range of instructions with identical
-/// debug info scope.
-///
-typedef std::pair<const MachineInstr *, const MachineInstr *> DbgRange;
-
-//===----------------------------------------------------------------------===//
-/// DbgScope - This class is used to track scope information.
-///
-class DbgScope {
- DbgScope *Parent; // Parent to this scope.
- DIDescriptor Desc; // Debug info descriptor for scope.
- // Location at which this scope is inlined.
- AssertingVH<const MDNode> InlinedAtLocation;
- bool AbstractScope; // Abstract Scope
- const MachineInstr *LastInsn; // Last instruction of this scope.
- const MachineInstr *FirstInsn; // First instruction of this scope.
- unsigned DFSIn, DFSOut;
- // Scopes defined in scope. Contents not owned.
- SmallVector<DbgScope *, 4> Scopes;
- // Variables declared in scope. Contents owned.
- SmallVector<DbgVariable *, 8> Variables;
- SmallVector<DbgRange, 4> Ranges;
- // Private state for dump()
- mutable unsigned IndentLevel;
-public:
- DbgScope(DbgScope *P, DIDescriptor D, const MDNode *I = 0)
- : Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(false),
- LastInsn(0), FirstInsn(0),
- DFSIn(0), DFSOut(0), IndentLevel(0) {
- if (Parent)
- Parent->addScope(this);
- }
- virtual ~DbgScope();
-
- // Accessors.
- DbgScope *getParent() const { return Parent; }
- DIDescriptor getDesc() const { return Desc; }
- const MDNode *getInlinedAt() const { return InlinedAtLocation; }
- const MDNode *getScopeNode() const { return Desc; }
- const SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
- const SmallVector<DbgVariable *, 8> &getDbgVariables() { return Variables; }
- const SmallVector<DbgRange, 4> &getRanges() { return Ranges; }
-
- /// openInsnRange - This scope covers instruction range starting from MI.
- void openInsnRange(const MachineInstr *MI) {
- if (!FirstInsn)
- FirstInsn = MI;
-
- if (Parent)
- Parent->openInsnRange(MI);
- }
-
- /// extendInsnRange - Extend the current instruction range covered by
- /// this scope.
- void extendInsnRange(const MachineInstr *MI) {
- assert (FirstInsn && "MI Range is not open!");
- LastInsn = MI;
- if (Parent)
- Parent->extendInsnRange(MI);
- }
-
- /// closeInsnRange - Create a range based on FirstInsn and LastInsn collected
- /// until now. This is used when a new scope is encountered while walking
- /// machine instructions.
- void closeInsnRange(DbgScope *NewScope = NULL) {
- assert (LastInsn && "Last insn missing!");
- Ranges.push_back(DbgRange(FirstInsn, LastInsn));
- FirstInsn = NULL;
- LastInsn = NULL;
- // If Parent dominates NewScope then do not close Parent's instruction
- // range.
- if (Parent && (!NewScope || !Parent->dominates(NewScope)))
- Parent->closeInsnRange(NewScope);
- }
-
- void setAbstractScope() { AbstractScope = true; }
- bool isAbstractScope() const { return AbstractScope; }
-
- // Depth First Search support to walk and manipulate DbgScope hierarchy.
- unsigned getDFSOut() const { return DFSOut; }
- void setDFSOut(unsigned O) { DFSOut = O; }
- unsigned getDFSIn() const { return DFSIn; }
- void setDFSIn(unsigned I) { DFSIn = I; }
- bool dominates(const DbgScope *S) {
- if (S == this)
- return true;
- if (DFSIn < S->getDFSIn() && DFSOut > S->getDFSOut())
- return true;
- return false;
- }
-
- /// addScope - Add a scope to the scope.
- ///
- void addScope(DbgScope *S) { Scopes.push_back(S); }
-
- /// addVariable - Add a variable to the scope.
- ///
- void addVariable(DbgVariable *V) { Variables.push_back(V); }
-
-#ifndef NDEBUG
- void dump() const;
-#endif
-};
-
} // end llvm namespace
-#ifndef NDEBUG
-void DbgScope::dump() const {
- raw_ostream &err = dbgs();
- err.indent(IndentLevel);
- err << "DFSIn: " << DFSIn << " DFSOut: " << DFSOut << "\n";
- const MDNode *N = Desc;
- N->dump();
- if (AbstractScope)
- err << "Abstract Scope\n";
-
- IndentLevel += 2;
- if (!Scopes.empty())
- err << "Children ...\n";
- for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
- if (Scopes[i] != this)
- Scopes[i]->dump();
-
- IndentLevel -= 2;
-}
-#endif
-
-DbgScope::~DbgScope() {
- for (unsigned j = 0, M = Variables.size(); j < M; ++j)
- delete Variables[j];
-}
-
DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
: Asm(A), MMI(Asm->MMI), FirstCU(0),
AbbreviationsSet(InitAbbreviationsSetSize),
- CurrentFnDbgScope(0), PrevLabel(NULL) {
+ PrevLabel(NULL) {
NextStringPoolNumber = 0;
DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
@@ -408,29 +274,6 @@
return SPDie;
}
-DbgScope *DwarfDebug::getOrCreateAbstractScope(const MDNode *N) {
- assert(N && "Invalid Scope encoding!");
-
- DbgScope *AScope = AbstractScopes.lookup(N);
- if (AScope)
- return AScope;
-
- DbgScope *Parent = NULL;
-
- DIDescriptor Scope(N);
- if (Scope.isLexicalBlock()) {
- DILexicalBlock DB(N);
- DIDescriptor ParentDesc = DB.getContext();
- Parent = getOrCreateAbstractScope(ParentDesc);
- }
- AScope = new DbgScope(Parent, DIDescriptor(N), NULL);
- AScope->setAbstractScope();
- AbstractScopes[N] = AScope;
- if (DIDescriptor(N).isSubprogram())
- AbstractScopesList.push_back(AScope);
- return AScope;
-}
-
/// isSubprogramContext - Return true if Context is either a subprogram
/// or another context nested inside a subprogram.
static bool isSubprogramContext(const MDNode *Context) {
@@ -512,25 +355,25 @@
/// constructLexicalScope - Construct new DW_TAG_lexical_block
/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
-DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
+DIE *DwarfDebug::constructLexicalScopeDIE(LexicalScope *Scope) {
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
if (Scope->isAbstractScope())
return ScopeDIE;
- const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
+ const SmallVector<InsnRange, 4> &Ranges = Scope->getRanges();
if (Ranges.empty())
return 0;
CompileUnit *TheCU = getCompileUnit(Scope->getScopeNode());
- SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
+ SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin();
if (Ranges.size() > 1) {
// .debug_range section has not been laid out yet. Emit offset in
// .debug_range as a uint, size 4, for now. emitDIE will handle
// DW_AT_ranges appropriately.
TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize());
- for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first));
DebugRangeSymbols.push_back(getLabelAfterInsn(RI->second));
@@ -557,11 +400,11 @@
/// constructInlinedScopeDIE - This scope represents inlined body of
/// a function. Construct DIE to represent this concrete inlined copy
/// of the function.
-DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
+DIE *DwarfDebug::constructInlinedScopeDIE(LexicalScope *Scope) {
- const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
+ const SmallVector<InsnRange, 4> &Ranges = Scope->getRanges();
assert (Ranges.empty() == false
- && "DbgScope does not have instruction markers!");
+ && "LexicalScope does not have instruction markers!");
if (!Scope->getScopeNode())
return NULL;
@@ -574,7 +417,7 @@
return NULL;
}
- SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
+ SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin();
const MCSymbol *StartLabel = getLabelBeforeInsn(RI->first);
const MCSymbol *EndLabel = getLabelAfterInsn(RI->second);
@@ -597,7 +440,7 @@
// DW_AT_ranges appropriately.
TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize());
- for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first));
DebugRangeSymbols.push_back(getLabelAfterInsn(RI->second));
@@ -650,7 +493,7 @@
}
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
-DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
+DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, LexicalScope *Scope) {
StringRef Name = DV->getName();
if (Name.empty())
return NULL;
@@ -784,25 +627,25 @@
}
/// constructScopeDIE - Construct a DIE for this scope.
-DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
+DIE *DwarfDebug::constructScopeDIE(LexicalScope *Scope) {
if (!Scope || !Scope->getScopeNode())
return NULL;
SmallVector <DIE *, 8> Children;
// Collect arguments for current function.
- if (Scope == CurrentFnDbgScope)
+ if (LScopes.isCurrentFunctionScope(Scope))
for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i)
if (DbgVariable *ArgDV = CurrentFnArguments[i])
if (DIE *Arg = constructVariableDIE(ArgDV, Scope))
Children.push_back(Arg);
// Collect lexical scope childrens first.
- const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
+ const SmallVector<DbgVariable *, 8> &Variables = ScopeVariables.lookup(Scope);
for (unsigned i = 0, N = Variables.size(); i < N; ++i)
if (DIE *Variable = constructVariableDIE(Variables[i], Scope))
Children.push_back(Variable);
- const SmallVector<DbgScope *, 4> &Scopes = Scope->getScopes();
+ const SmallVector<LexicalScope *, 4> &Scopes = Scope->getChildren();
for (unsigned j = 0, M = Scopes.size(); j < M; ++j)
if (DIE *Nested = constructScopeDIE(Scopes[j]))
Children.push_back(Nested);
@@ -1176,7 +1019,7 @@
void DwarfDebug::endModule() {
if (!FirstCU) return;
const Module *M = MMI->getModule();
- DenseMap<const MDNode *, DbgScope *> DeadFnScopeMap;
+ DenseMap<const MDNode *, LexicalScope *> DeadFnScopeMap;
if (NamedMDNode *AllSPs = M->getNamedMetadata("llvm.dbg.sp")) {
for (unsigned SI = 0, SE = AllSPs->getNumOperands(); SI != SE; ++SI) {
if (ProcessedSPNodes.count(AllSPs->getOperand(SI)) != 0) continue;
@@ -1192,21 +1035,20 @@
if (!NMD) continue;
unsigned E = NMD->getNumOperands();
if (!E) continue;
- DbgScope *Scope = new DbgScope(NULL, DIDescriptor(SP), NULL);
+ LexicalScope *Scope = new LexicalScope(NULL, DIDescriptor(SP), NULL, false);
DeadFnScopeMap[SP] = Scope;
+ SmallVector<DbgVariable *, 8> Variables;
for (unsigned I = 0; I != E; ++I) {
DIVariable DV(NMD->getOperand(I));
if (!DV.Verify()) continue;
- Scope->addVariable(new DbgVariable(DV));
+ Variables.push_back(new DbgVariable(DV));
}
// Construct subprogram DIE and add variables DIEs.
constructSubprogramDIE(SP);
DIE *ScopeDIE = getCompileUnit(SP)->getDIE(SP);
- const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
- DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
- if (VariableDIE)
+ if (DIE *VariableDIE = constructVariableDIE(Variables[i], Scope))
ScopeDIE->addChild(VariableDIE);
}
}
@@ -1284,20 +1126,23 @@
}
/// findAbstractVariable - Find abstract variable, if any, associated with Var.
-DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
+DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &DV,
DebugLoc ScopeLoc) {
+ LLVMContext &Ctx = DV->getContext();
+
+ // More then one inlined variable corresponds to one abstract variable.
+ DIVariable Var = cleanseInlinedVariable(DV, Ctx);
DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var);
if (AbsDbgVariable)
return AbsDbgVariable;
- LLVMContext &Ctx = Var->getContext();
- DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope(Ctx));
+ LexicalScope *Scope = LScopes.findAbstractScope(ScopeLoc.getScope(Ctx));
if (!Scope)
return NULL;
AbsDbgVariable = new DbgVariable(Var);
- Scope->addVariable(AbsDbgVariable);
+ addScopeVariable(Scope, AbsDbgVariable);
AbstractVariables[Var] = AbsDbgVariable;
return AbsDbgVariable;
}
@@ -1305,8 +1150,8 @@
/// addCurrentFnArgument - If Var is a current function argument then add
/// it to CurrentFnArguments list.
bool DwarfDebug::addCurrentFnArgument(const MachineFunction *MF,
- DbgVariable *Var, DbgScope *Scope) {
- if (Scope != CurrentFnDbgScope)
+ DbgVariable *Var, LexicalScope *Scope) {
+ if (!LScopes.isCurrentFunctionScope(Scope))
return false;
DIVariable DV = Var->getVariable();
if (DV.getTag() != dwarf::DW_TAG_arg_variable)
@@ -1340,7 +1185,7 @@
DIVariable DV(Var);
const std::pair<unsigned, DebugLoc> &VP = VI->second;
- DbgScope *Scope = findDbgScope(VP.second);
+ LexicalScope *Scope = LScopes.findLexicalScope(VP.second);
// If variable scope is not found then skip this variable.
if (Scope == 0)
@@ -1350,7 +1195,7 @@
DbgVariable *RegVar = new DbgVariable(DV);
recordVariableFrameIndex(RegVar, VP.first);
if (!addCurrentFnArgument(MF, RegVar, Scope))
- Scope->addVariable(RegVar);
+ addScopeVariable(Scope, RegVar);
if (AbsDbgVariable) {
recordVariableFrameIndex(AbsDbgVariable, VP.first);
VarToAbstractVarMap[RegVar] = AbsDbgVariable;
@@ -1395,7 +1240,7 @@
return DotDebugLocEntry();
}
-/// collectVariableInfo - Populate DbgScope entries with variables' info.
+/// collectVariableInfo - Find variables for each lexical scope.
void
DwarfDebug::collectVariableInfo(const MachineFunction *MF,
SmallPtrSet<const MDNode *, 16> &Processed) {
@@ -1418,18 +1263,18 @@
const MachineInstr *MInsn = History.front();
DIVariable DV(Var);
- DbgScope *Scope = NULL;
+ LexicalScope *Scope = NULL;
if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
DISubprogram(DV.getContext()).describes(MF->getFunction()))
- Scope = CurrentFnDbgScope;
+ Scope = LScopes.getCurrentFunctionScope();
else {
if (DV.getVersion() <= LLVMDebugVersion9)
- Scope = findDbgScope(MInsn->getDebugLoc());
+ Scope = LScopes.findLexicalScope(MInsn->getDebugLoc());
else {
if (MDNode *IA = DV.getInlinedAt())
- Scope = InlinedDbgScopeMap.lookup(DebugLoc::getFromDILocation(IA));
+ Scope = LScopes.findInlinedScope(DebugLoc::getFromDILocation(IA));
else
- Scope = DbgScopeMap.lookup(cast<MDNode>(DV->getOperand(1)));
+ Scope = LScopes.findLexicalScope(cast<MDNode>(DV->getOperand(1)));
}
}
// If variable scope is not found then skip this variable.
@@ -1440,7 +1285,7 @@
assert(MInsn->isDebugValue() && "History must begin with debug value");
DbgVariable *RegVar = new DbgVariable(DV);
if (!addCurrentFnArgument(MF, RegVar, Scope))
- Scope->addVariable(RegVar);
+ addScopeVariable(Scope, RegVar);
if (DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc())) {
DbgVariableToDbgInstMap[AbsVar] = MInsn;
VarToAbstractVarMap[RegVar] = AbsVar;
@@ -1501,9 +1346,8 @@
DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
if (!DV || !Processed.insert(DV))
continue;
- DbgScope *Scope = DbgScopeMap.lookup(DV.getContext());
- if (Scope)
- Scope->addVariable(new DbgVariable(DV));
+ if (LexicalScope *Scope = LScopes.findLexicalScope(DV.getContext()))
+ addScopeVariable(Scope, new DbgVariable(DV));
}
}
}
@@ -1585,253 +1429,33 @@
I->second = PrevLabel;
}
-/// getOrCreateRegularScope - Create regular DbgScope.
-DbgScope *DwarfDebug::getOrCreateRegularScope(MDNode *Scope) {
- DbgScope *WScope = DbgScopeMap.lookup(Scope);
- if (WScope)
- return WScope;
-
- DbgScope *Parent = NULL;
- if (DIDescriptor(Scope).isLexicalBlock())
- Parent = getOrCreateDbgScope(DebugLoc::getFromDILexicalBlock(Scope));
- WScope = new DbgScope(Parent, DIDescriptor(Scope), NULL);
- DbgScopeMap.insert(std::make_pair(Scope, WScope));
- if (!Parent && DIDescriptor(Scope).isSubprogram()
- && DISubprogram(Scope).describes(Asm->MF->getFunction()))
- CurrentFnDbgScope = WScope;
-
- return WScope;
-}
-
-/// getOrCreateInlinedScope - Create inlined scope.
-DbgScope *DwarfDebug::getOrCreateInlinedScope(MDNode *Scope, MDNode *InlinedAt){
- DbgScope *InlinedScope = DbgScopeMap.lookup(InlinedAt);
- if (InlinedScope)
- return InlinedScope;
-
- DebugLoc InlinedLoc = DebugLoc::getFromDILocation(InlinedAt);
- InlinedScope = new DbgScope(getOrCreateDbgScope(InlinedLoc),
- DIDescriptor(Scope), InlinedAt);
- InlinedDbgScopeMap[InlinedLoc] = InlinedScope;
- DbgScopeMap[InlinedAt] = InlinedScope;
- return InlinedScope;
-}
-
-/// getOrCreateDbgScope - Create DbgScope for the scope.
-DbgScope *DwarfDebug::getOrCreateDbgScope(DebugLoc DL) {
- LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
- MDNode *Scope = NULL;
- MDNode *InlinedAt = NULL;
- DL.getScopeAndInlinedAt(Scope, InlinedAt, Ctx);
- if (!InlinedAt)
- return getOrCreateRegularScope(Scope);
-
- // Create an abstract scope for inlined function.
- getOrCreateAbstractScope(Scope);
- // Create an inlined scope for inlined function.
- return getOrCreateInlinedScope(Scope, InlinedAt);
-}
-
-/// calculateDominanceGraph - Calculate dominance graph for DbgScope
-/// hierarchy.
-static void calculateDominanceGraph(DbgScope *Scope) {
- assert (Scope && "Unable to calculate scop edominance graph!");
- SmallVector<DbgScope *, 4> WorkStack;
- WorkStack.push_back(Scope);
- unsigned Counter = 0;
- while (!WorkStack.empty()) {
- DbgScope *WS = WorkStack.back();
- const SmallVector<DbgScope *, 4> &Children = WS->getScopes();
- bool visitedChildren = false;
- for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
- SE = Children.end(); SI != SE; ++SI) {
- DbgScope *ChildScope = *SI;
- if (!ChildScope->getDFSOut()) {
- WorkStack.push_back(ChildScope);
- visitedChildren = true;
- ChildScope->setDFSIn(++Counter);
-#ifndef NDEBUG
- if (PrintDbgScope)
- dbgs() << "calculate dbgscope dom: In " << Counter << "\n";
-#endif
- break;
- }
- }
- if (!visitedChildren) {
- WorkStack.pop_back();
- WS->setDFSOut(++Counter);
-#ifndef NDEBUG
- if (PrintDbgScope)
- dbgs() << "calculate dbgscope dom: In " << WS->getDFSIn()
- << " Out " << Counter << "\n";
-#endif
- }
- }
-}
-
-/// printDbgScopeInfo - Print DbgScope info for each machine instruction.
-static
-void printDbgScopeInfo(const MachineFunction *MF,
- DenseMap<const MachineInstr *, DbgScope *> &MI2ScopeMap)
-{
-#ifndef NDEBUG
- LLVMContext &Ctx = MF->getFunction()->getContext();
- unsigned PrevDFSIn = 0;
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MInsn = II;
- MDNode *Scope = NULL;
- MDNode *InlinedAt = NULL;
-
- // Check if instruction has valid location information.
- DebugLoc MIDL = MInsn->getDebugLoc();
- if (!MIDL.isUnknown()) {
- MIDL.getScopeAndInlinedAt(Scope, InlinedAt, Ctx);
- dbgs() << " [ ";
- if (InlinedAt)
- dbgs() << "*";
- DenseMap<const MachineInstr *, DbgScope *>::iterator DI =
- MI2ScopeMap.find(MInsn);
- if (DI != MI2ScopeMap.end()) {
- DbgScope *S = DI->second;
- dbgs() << S->getDFSIn();
- PrevDFSIn = S->getDFSIn();
- } else
- dbgs() << PrevDFSIn;
- } else
- dbgs() << " [ x" << PrevDFSIn;
- dbgs() << " ]";
- MInsn->dump();
- }
- dbgs() << "\n";
- }
-#endif
-}
-/// extractScopeInformation - Scan machine instructions in this function
-/// and collect DbgScopes. Return true, if at least one scope was found.
-bool DwarfDebug::extractScopeInformation() {
- // If scope information was extracted using .dbg intrinsics then there is not
- // any need to extract these information by scanning each instruction.
- if (!DbgScopeMap.empty())
- return false;
-
- // Scan each instruction and create scopes. First build working set of scopes.
- SmallVector<DbgRange, 4> MIRanges;
- DenseMap<const MachineInstr *, DbgScope *> MI2ScopeMap;
- for (MachineFunction::const_iterator I = Asm->MF->begin(), E = Asm->MF->end();
- I != E; ++I) {
- const MachineInstr *RangeBeginMI = NULL;
- const MachineInstr *PrevMI = NULL;
- DebugLoc PrevDL;
- for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
- II != IE; ++II) {
- const MachineInstr *MInsn = II;
-
- // Check if instruction has valid location information.
- const DebugLoc MIDL = MInsn->getDebugLoc();
- if (MIDL.isUnknown()) {
- PrevMI = MInsn;
- continue;
- }
-
- // If scope has not changed then skip this instruction.
- if (MIDL == PrevDL) {
- PrevMI = MInsn;
- continue;
- }
-
- // Ignore DBG_VALUE. It does not contribute to any instruction in output.
- if (MInsn->isDebugValue())
- continue;
-
- if (RangeBeginMI) {
- // If we have already seen a beginning of an instruction range and
- // current instruction scope does not match scope of first instruction
- // in this range then create a new instruction range.
- DEBUG(dbgs() << "Creating new instruction range :\n");
- DEBUG(dbgs() << "Begin Range at " << *RangeBeginMI);
- DEBUG(dbgs() << "End Range at " << *PrevMI);
- DEBUG(dbgs() << "Next Range starting at " << *MInsn);
- DEBUG(dbgs() << "------------------------\n");
- DbgRange R(RangeBeginMI, PrevMI);
- MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevDL);
- MIRanges.push_back(R);
- }
-
- // This is a beginning of a new instruction range.
- RangeBeginMI = MInsn;
-
- // Reset previous markers.
- PrevMI = MInsn;
- PrevDL = MIDL;
- }
-
- // Create last instruction range.
- if (RangeBeginMI && PrevMI && !PrevDL.isUnknown()) {
- DbgRange R(RangeBeginMI, PrevMI);
- MIRanges.push_back(R);
- MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevDL);
- }
- }
-
- if (!CurrentFnDbgScope)
- return false;
-
- calculateDominanceGraph(CurrentFnDbgScope);
- if (PrintDbgScope)
- printDbgScopeInfo(Asm->MF, MI2ScopeMap);
-
- // Find ranges of instructions covered by each DbgScope;
- DbgScope *PrevDbgScope = NULL;
- for (SmallVector<DbgRange, 4>::const_iterator RI = MIRanges.begin(),
- RE = MIRanges.end(); RI != RE; ++RI) {
- const DbgRange &R = *RI;
- DbgScope *S = MI2ScopeMap.lookup(R.first);
- assert (S && "Lost DbgScope for a machine instruction!");
- if (PrevDbgScope && !PrevDbgScope->dominates(S))
- PrevDbgScope->closeInsnRange(S);
- S->openInsnRange(R.first);
- S->extendInsnRange(R.second);
- PrevDbgScope = S;
- }
-
- if (PrevDbgScope)
- PrevDbgScope->closeInsnRange();
-
- identifyScopeMarkers();
-
- return !DbgScopeMap.empty();
-}
-
/// identifyScopeMarkers() -
-/// Each DbgScope has first instruction and last instruction to mark beginning
+/// Each LexicalScope has first instruction and last instruction to mark beginning
/// and end of a scope respectively. Create an inverse map that list scopes
/// starts (and ends) with an instruction. One instruction may start (or end)
/// multiple scopes. Ignore scopes that are not reachable.
void DwarfDebug::identifyScopeMarkers() {
- SmallVector<DbgScope *, 4> WorkList;
- WorkList.push_back(CurrentFnDbgScope);
+ SmallVector<LexicalScope *, 4> WorkList;
+ WorkList.push_back(LScopes.getCurrentFunctionScope());
while (!WorkList.empty()) {
- DbgScope *S = WorkList.pop_back_val();
+ LexicalScope *S = WorkList.pop_back_val();
- const SmallVector<DbgScope *, 4> &Children = S->getScopes();
+ const SmallVector<LexicalScope *, 4> &Children = S->getChildren();
if (!Children.empty())
- for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
+ for (SmallVector<LexicalScope *, 4>::const_iterator SI = Children.begin(),
SE = Children.end(); SI != SE; ++SI)
WorkList.push_back(*SI);
if (S->isAbstractScope())
continue;
- const SmallVector<DbgRange, 4> &Ranges = S->getRanges();
+ const SmallVector<InsnRange, 4> &Ranges = S->getRanges();
if (Ranges.empty())
continue;
- for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
+ for (SmallVector<InsnRange, 4>::const_iterator RI = Ranges.begin(),
RE = Ranges.end(); RI != RE; ++RI) {
- assert(RI->first && "DbgRange does not have first instruction!");
- assert(RI->second && "DbgRange does not have second instruction!");
+ assert(RI->first && "InsnRange does not have first instruction!");
+ assert(RI->second && "InsnRange does not have second instruction!");
requestLabelBeforeInsn(RI->first);
requestLabelAfterInsn(RI->second);
}
@@ -1859,7 +1483,9 @@
/// emitted immediately after the function entry point.
void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MMI->hasDebugInfo()) return;
- if (!extractScopeInformation()) return;
+ LScopes.initialize(*MF);
+ if (LScopes.empty()) return;
+ identifyScopeMarkers();
FunctionBeginSym = Asm->GetTempSymbol("func_begin",
Asm->getFunctionNumber());
@@ -2025,71 +1651,73 @@
}
}
+void DwarfDebug::addScopeVariable(LexicalScope *LS, DbgVariable *Var) {
+// SmallVector<DbgVariable *, 8> &Vars = ScopeVariables.lookup(LS);
+ ScopeVariables[LS].push_back(Var);
+// Vars.push_back(Var);
+}
+
/// endFunction - Gather and emit post-function debug information.
///
void DwarfDebug::endFunction(const MachineFunction *MF) {
- if (!MMI->hasDebugInfo() || DbgScopeMap.empty()) return;
-
- if (CurrentFnDbgScope) {
-
- // Define end label for subprogram.
- FunctionEndSym = Asm->GetTempSymbol("func_end",
- Asm->getFunctionNumber());
- // Assumes in correct section after the entry point.
- Asm->OutStreamer.EmitLabel(FunctionEndSym);
-
- SmallPtrSet<const MDNode *, 16> ProcessedVars;
- collectVariableInfo(MF, ProcessedVars);
+ if (!MMI->hasDebugInfo() || LScopes.empty()) return;
- // Construct abstract scopes.
- for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
- AE = AbstractScopesList.end(); AI != AE; ++AI) {
- DISubprogram SP((*AI)->getScopeNode());
- if (SP.Verify()) {
- // Collect info for variables that were optimized out.
- StringRef FName = SP.getLinkageName();
- if (FName.empty())
- FName = SP.getName();
- if (NamedMDNode *NMD =
- getFnSpecificMDNode(*(MF->getFunction()->getParent()), FName)) {
- for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ // Define end label for subprogram.
+ FunctionEndSym = Asm->GetTempSymbol("func_end",
+ Asm->getFunctionNumber());
+ // Assumes in correct section after the entry point.
+ Asm->OutStreamer.EmitLabel(FunctionEndSym);
+
+ SmallPtrSet<const MDNode *, 16> ProcessedVars;
+ collectVariableInfo(MF, ProcessedVars);
+
+ // Construct abstract scopes.
+ SmallVector<LexicalScope *, 4> &AList = LScopes.getAbstractScopesList();
+ for (SmallVector<LexicalScope *, 4>::iterator AI = AList.begin(),
+ AE = AList.end(); AI != AE; ++AI) {
+ DISubprogram SP((*AI)->getScopeNode());
+ if (SP.Verify()) {
+ // Collect info for variables that were optimized out.
+ StringRef FName = SP.getLinkageName();
+ if (FName.empty())
+ FName = SP.getName();
+ if (NamedMDNode *NMD =
+ getFnSpecificMDNode(*(MF->getFunction()->getParent()), FName)) {
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
if (!DV || !ProcessedVars.insert(DV))
continue;
- DbgScope *Scope = AbstractScopes.lookup(DV.getContext());
- if (Scope)
- Scope->addVariable(new DbgVariable(DV));
- }
+ if (LexicalScope *Scope = LScopes.findAbstractScope(DV.getContext()))
+ addScopeVariable(Scope, new DbgVariable(DV));
}
}
- if (ProcessedSPNodes.count((*AI)->getScopeNode()) == 0)
- constructScopeDIE(*AI);
}
-
- DIE *CurFnDIE = constructScopeDIE(CurrentFnDbgScope);
-
- if (!DisableFramePointerElim(*MF))
- getCompileUnit(CurrentFnDbgScope->getScopeNode())->addUInt(CurFnDIE,
- dwarf::DW_AT_APPLE_omit_frame_ptr,
- dwarf::DW_FORM_flag, 1);
-
-
- DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(),
- MMI->getFrameMoves()));
+ if (ProcessedSPNodes.count((*AI)->getScopeNode()) == 0)
+ constructScopeDIE(*AI);
+ }
+
+ DIE *CurFnDIE = constructScopeDIE(LScopes.getCurrentFunctionScope());
+
+ if (!DisableFramePointerElim(*MF)) {
+ LexicalScope *FnScope = LScopes.getCurrentFunctionScope();
+ getCompileUnit(FnScope->getScopeNode())->addUInt(CurFnDIE,
+ dwarf::DW_AT_APPLE_omit_frame_ptr,
+ dwarf::DW_FORM_flag, 1);
}
+ DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(),
+ MMI->getFrameMoves()));
// Clear debug info
- CurrentFnDbgScope = NULL;
+ for (DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> >::iterator
+ I = ScopeVariables.begin(), E = ScopeVariables.end(); I != E; ++I)
+ DeleteContainerPointers(I->second);
+ ScopeVariables.clear();
DeleteContainerPointers(CurrentFnArguments);
DbgVariableToFrameIndexMap.clear();
VarToAbstractVarMap.clear();
DbgVariableToDbgInstMap.clear();
- InlinedDbgScopeMap.clear();
- DeleteContainerSeconds(DbgScopeMap);
UserVariables.clear();
DbgValues.clear();
- DeleteContainerSeconds(AbstractScopes);
- AbstractScopesList.clear();
AbstractVariables.clear();
LabelsBeforeInsn.clear();
LabelsAfterInsn.clear();
@@ -2114,21 +1742,6 @@
return true;
}
-/// findDbgScope - Find DbgScope for the debug loc.
-DbgScope *DwarfDebug::findDbgScope(DebugLoc DL) {
- if (DL.isUnknown())
- return NULL;
-
- DbgScope *Scope = NULL;
- LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
- if (MDNode *IA = DL.getInlinedAt(Ctx))
- Scope = InlinedDbgScopeMap.lookup(DebugLoc::getFromDILocation(IA));
- else
- Scope = DbgScopeMap.lookup(DL.getScope(Ctx));
- return Scope;
-}
-
-
/// recordSourceLine - Register a source line with debug info. Returns the
/// unique label that was emitted and which provides correspondence to
/// the source line list.
Modified: llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h?rev=137246&r1=137245&r2=137246&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h (original)
+++ llvm/trunk/lib/CodeGen/AsmPrinter/DwarfDebug.h Wed Aug 10 15:55:27 2011
@@ -15,6 +15,7 @@
#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
#include "llvm/CodeGen/AsmPrinter.h"
+#include "llvm/CodeGen/LexicalScopes.h"
#include "llvm/MC/MachineLocation.h"
#include "llvm/Analysis/DebugInfo.h"
#include "DIE.h"
@@ -30,7 +31,6 @@
class CompileUnit;
class DbgConcreteScope;
-class DbgScope;
class DbgVariable;
class MachineFrameInfo;
class MachineModuleInfo;
@@ -192,33 +192,18 @@
///
UniqueVector<const MCSection*> SectionMap;
- /// CurrentFnDbgScope - Top level scope for the current function.
- ///
- DbgScope *CurrentFnDbgScope;
-
/// CurrentFnArguments - List of Arguments (DbgValues) for current function.
SmallVector<DbgVariable *, 8> CurrentFnArguments;
- /// DbgScopeMap - Tracks the scopes in the current function. Owns the
- /// contained DbgScope*s.
- DenseMap<const MDNode *, DbgScope *> DbgScopeMap;
-
- /// InlinedDbgScopeMap - Tracks inlined function scopes in current function.
- DenseMap<DebugLoc, DbgScope *> InlinedDbgScopeMap;
-
- /// AbstractScopes - Tracks the abstract scopes a module. These scopes are
- /// not included DbgScopeMap. AbstractScopes owns its DbgScope*s.
- DenseMap<const MDNode *, DbgScope *> AbstractScopes;
+ LexicalScopes LScopes;
/// AbstractSPDies - Collection of abstract subprogram DIEs.
DenseMap<const MDNode *, DIE *> AbstractSPDies;
- /// AbstractScopesList - Tracks abstract scopes constructed while processing
- /// a function. This list is cleared during endFunction().
- SmallVector<DbgScope *, 4>AbstractScopesList;
+ /// ScopeVariables - Collection of dbg variables of a scope.
+ DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> > ScopeVariables;
- /// AbstractVariables - Collection on abstract variables. Owned by the
- /// DbgScopes in AbstractScopes.
+ /// AbstractVariables - Collection on abstract variables.
DenseMap<const MDNode *, DbgVariable *> AbstractVariables;
/// DbgVariableToFrameIndexMap - Tracks frame index used to find
@@ -316,11 +301,7 @@
///
void assignAbbrevNumber(DIEAbbrev &Abbrev);
- /// getOrCreateDbgScope - Create DbgScope for the scope.
- DbgScope *getOrCreateDbgScope(DebugLoc DL);
- DbgScope *getOrCreateRegularScope(MDNode *Scope);
- DbgScope *getOrCreateInlinedScope(MDNode *Scope, MDNode *InlinedAt);
- DbgScope *getOrCreateAbstractScope(const MDNode *N);
+ void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
/// findAbstractVariable - Find abstract variable associated with Var.
DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc);
@@ -333,18 +314,18 @@
/// constructLexicalScope - Construct new DW_TAG_lexical_block
/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
- DIE *constructLexicalScopeDIE(DbgScope *Scope);
+ DIE *constructLexicalScopeDIE(LexicalScope *Scope);
/// constructInlinedScopeDIE - This scope represents inlined body of
/// a function. Construct DIE to represent this concrete inlined copy
/// of the function.
- DIE *constructInlinedScopeDIE(DbgScope *Scope);
+ DIE *constructInlinedScopeDIE(LexicalScope *Scope);
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
- DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S);
+ DIE *constructVariableDIE(DbgVariable *DV, LexicalScope *S);
/// constructScopeDIE - Construct a DIE for this scope.
- DIE *constructScopeDIE(DbgScope *Scope);
+ DIE *constructScopeDIE(LexicalScope *Scope);
/// EmitSectionLabels - Emit initial Dwarf sections with a label at
/// the start of each one.
@@ -449,23 +430,16 @@
/// is found. Update FI to hold value of the index.
bool findVariableFrameIndex(const DbgVariable *V, int *FI);
- /// findDbgScope - Find DbgScope for the debug loc.
- DbgScope *findDbgScope(DebugLoc DL);
-
/// identifyScopeMarkers() - Indentify instructions that are marking
/// beginning of or end of a scope.
void identifyScopeMarkers();
- /// extractScopeInformation - Scan machine instructions in this function
- /// and collect DbgScopes. Return true, if atleast one scope was found.
- bool extractScopeInformation();
-
/// addCurrentFnArgument - If Var is an current function argument that add
/// it in CurrentFnArguments list.
bool addCurrentFnArgument(const MachineFunction *MF,
- DbgVariable *Var, DbgScope *Scope);
+ DbgVariable *Var, LexicalScope *Scope);
- /// collectVariableInfo - Populate DbgScope entries with variables' info.
+ /// collectVariableInfo - Populate LexicalScope entries with variables' info.
void collectVariableInfo(const MachineFunction *,
SmallPtrSet<const MDNode *, 16> &ProcessedVars);
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