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Pull some code out into functions to make rearranging them a bit easier.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168481 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher 2012-11-22 00:59:49 +00:00
parent 72a2c0622a
commit 4117bec41b
2 changed files with 86 additions and 49 deletions
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120
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -797,71 +797,83 @@ void DwarfDebug::beginModule() {
SectionMap.insert(Asm->getObjFileLowering().getTextSection());
}
/// endModule - Emit all Dwarf sections that should come after the content.
///
void DwarfDebug::endModule() {
if (!FirstCU) return;
const Module *M = MMI->getModule();
DenseMap<const MDNode *, LexicalScope *> DeadFnScopeMap;
// Collect info for variables that were optimized out.
if (NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu")) {
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
DICompileUnit TheCU(CU_Nodes->getOperand(i));
DIArray Subprograms = TheCU.getSubprograms();
for (unsigned i = 0, e = Subprograms.getNumElements(); i != e; ++i) {
DISubprogram SP(Subprograms.getElement(i));
if (ProcessedSPNodes.count(SP) != 0) continue;
if (!SP.Verify()) continue;
if (!SP.isDefinition()) continue;
DIArray Variables = SP.getVariables();
if (Variables.getNumElements() == 0) continue;
LexicalScope *Scope =
new LexicalScope(NULL, DIDescriptor(SP), NULL, false);
DeadFnScopeMap[SP] = Scope;
// Construct subprogram DIE and add variables DIEs.
CompileUnit *SPCU = CUMap.lookup(TheCU);
assert(SPCU && "Unable to find Compile Unit!");
constructSubprogramDIE(SPCU, SP);
DIE *ScopeDIE = SPCU->getDIE(SP);
for (unsigned vi = 0, ve = Variables.getNumElements(); vi != ve; ++vi) {
DIVariable DV(Variables.getElement(vi));
if (!DV.Verify()) continue;
DbgVariable *NewVar = new DbgVariable(DV, NULL);
if (DIE *VariableDIE =
SPCU->constructVariableDIE(NewVar, Scope->isAbstractScope()))
ScopeDIE->addChild(VariableDIE);
}
}
}
}
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
void DwarfDebug::computeInlinedDIEs() {
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
for (SmallPtrSet<DIE *, 4>::iterator AI = InlinedSubprogramDIEs.begin(),
AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) {
AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) {
DIE *ISP = *AI;
FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
}
for (DenseMap<const MDNode *, DIE *>::iterator AI = AbstractSPDies.begin(),
AE = AbstractSPDies.end(); AI != AE; ++AI) {
AE = AbstractSPDies.end(); AI != AE; ++AI) {
DIE *ISP = AI->second;
if (InlinedSubprogramDIEs.count(ISP))
continue;
FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
}
}
// Collect info for variables that were optimized out.
void DwarfDebug::collectDeadVariables() {
const Module *M = MMI->getModule();
DenseMap<const MDNode *, LexicalScope *> DeadFnScopeMap;
if (NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu")) {
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
DICompileUnit TheCU(CU_Nodes->getOperand(i));
DIArray Subprograms = TheCU.getSubprograms();
for (unsigned i = 0, e = Subprograms.getNumElements(); i != e; ++i) {
DISubprogram SP(Subprograms.getElement(i));
if (ProcessedSPNodes.count(SP) != 0) continue;
if (!SP.Verify()) continue;
if (!SP.isDefinition()) continue;
DIArray Variables = SP.getVariables();
if (Variables.getNumElements() == 0) continue;
LexicalScope *Scope =
new LexicalScope(NULL, DIDescriptor(SP), NULL, false);
DeadFnScopeMap[SP] = Scope;
// Construct subprogram DIE and add variables DIEs.
CompileUnit *SPCU = CUMap.lookup(TheCU);
assert(SPCU && "Unable to find Compile Unit!");
constructSubprogramDIE(SPCU, SP);
DIE *ScopeDIE = SPCU->getDIE(SP);
for (unsigned vi = 0, ve = Variables.getNumElements(); vi != ve; ++vi) {
DIVariable DV(Variables.getElement(vi));
if (!DV.Verify()) continue;
DbgVariable *NewVar = new DbgVariable(DV, NULL);
if (DIE *VariableDIE =
SPCU->constructVariableDIE(NewVar, Scope->isAbstractScope()))
ScopeDIE->addChild(VariableDIE);
}
}
}
}
DeleteContainerSeconds(DeadFnScopeMap);
}
void DwarfDebug::finalizeModuleInfo() {
// Collect info for variables that were optimized out.
collectDeadVariables();
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
computeInlinedDIEs();
// Emit DW_AT_containing_type attribute to connect types with their
// vtable holding type.
for (DenseMap<const MDNode *, CompileUnit *>::iterator CUI = CUMap.begin(),
CUE = CUMap.end(); CUI != CUE; ++CUI) {
CUE = CUMap.end(); CUI != CUE; ++CUI) {
CompileUnit *TheCU = CUI->second;
TheCU->constructContainingTypeDIEs();
}
// Compute DIE offsets and sizes.
computeSizeAndOffsets();
}
void DwarfDebug::endSections() {
// Standard sections final addresses.
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getTextSection());
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("text_end"));
@ -873,9 +885,20 @@ void DwarfDebug::endModule() {
Asm->OutStreamer.SwitchSection(SectionMap[I]);
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_end", I+1));
}
}
// Compute DIE offsets and sizes.
computeSizeAndOffsets();
/// endModule - Emit all Dwarf sections that should come after the content.
///
void DwarfDebug::endModule() {
if (!FirstCU) return;
// End any existing sections.
// TODO: Does this need to happen?
endSections();
// Finalize the debug info for the module.
finalizeModuleInfo();
// Emit initial sections.
emitSectionLabels();
@ -923,7 +946,6 @@ void DwarfDebug::endModule() {
emitDebugStr();
// clean up.
DeleteContainerSeconds(DeadFnScopeMap);
SPMap.clear();
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
E = CUMap.end(); I != E; ++I)

15
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -367,6 +367,21 @@ private:
///
void computeSizeAndOffsets();
/// computeInlinedDIEs - Attach DW_AT_inline attribute with inlined
/// subprogram DIEs.
void computeInlinedDIEs();
/// collectDeadVariables - Collect info for variables that were optimized out.
void collectDeadVariables();
/// finalizeModuleInfo - Finish off debug information after all functions
/// have been processed.
void finalizeModuleInfo();
/// endSections - Emit labels to close any remaining sections that have
/// been left open.
void endSections();
/// EmitDebugInfo - Emit the debug info section.
///
void emitDebugInfo();