#ifndef LLVM_ANALYSIS_DEBUGINFO_H
#define LLVM_ANALYSIS_DEBUGINFO_H
+#include "llvm/Target/TargetMachine.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/Dwarf.h"
return getUnsignedField(0) & ~LLVMDebugVersionMask;
}
+ /// ValidDebugInfo - Return true if V represents valid debug info value.
+ static bool ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel);
+
};
/// DIAnchor - A wrapper for various anchor descriptors.
///
void EndFunction(MachineFunction *MF);
- /// ValidDebugInfo - Return true if V represents valid debug info value.
- bool ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel);
-
/// RecordSourceLine - Register a source line with debug info. Returns a
/// unique label ID used to generate a label and provide correspondence to
/// the source line list.
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Analysis/ValueTracking.h"
+#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Streams.h"
using namespace llvm;
+using namespace llvm::dwarf;
//===----------------------------------------------------------------------===//
// DIDescriptor
//===----------------------------------------------------------------------===//
+/// ValidDebugInfo - Return true if V represents valid debug info value.
+bool DIDescriptor::ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel) {
+ if (!V)
+ return false;
+
+ GlobalVariable *GV = dyn_cast<GlobalVariable>(V->stripPointerCasts());
+ if (!GV)
+ return false;
+
+ if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
+ return false;
+
+ DIDescriptor DI(GV);
+
+ // Check current version. Allow Version6 for now.
+ unsigned Version = DI.getVersion();
+ if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
+ return false;
+
+ unsigned Tag = DI.getTag();
+ switch (Tag) {
+ case DW_TAG_variable:
+ assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
+ break;
+ case DW_TAG_compile_unit:
+ assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
+ break;
+ case DW_TAG_subprogram:
+ assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
+ break;
+ case DW_TAG_lexical_block:
+ /// FIXME. This interfers with the quality of generated code when
+ /// during optimization.
+ if (OptLevel != CodeGenOpt::None)
+ return false;
+ default:
+ break;
+ }
+
+ return true;
+}
+
DIDescriptor::DIDescriptor(GlobalVariable *gv, unsigned RequiredTag) {
GV = gv;
class DIE;
class DIEValue;
-//===----------------------------------------------------------------------===//
-/// Utility routines.
-///
-/// getGlobalVariable - Return either a direct or cast Global value.
-///
-static GlobalVariable *getGlobalVariable(Value *V) {
- if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
- return GV;
- } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
- if (CE->getOpcode() == Instruction::BitCast) {
- return dyn_cast<GlobalVariable>(CE->getOperand(0));
- } else if (CE->getOpcode() == Instruction::GetElementPtr) {
- for (unsigned int i=1; i<CE->getNumOperands(); i++) {
- if (!CE->getOperand(i)->isNullValue())
- return NULL;
- }
- return dyn_cast<GlobalVariable>(CE->getOperand(0));
- }
- }
- return NULL;
-}
-
//===----------------------------------------------------------------------===//
/// DWLabel - Labels are used to track locations in the assembler file.
/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
DebugTimer->stopTimer();
}
- /// ValidDebugInfo - Return true if V represents valid debug info value.
- bool ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel) {
- if (!V)
- return false;
-
- if (!shouldEmit)
- return false;
-
- GlobalVariable *GV = getGlobalVariable(V);
- if (!GV)
- return false;
-
- if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
- return false;
-
- if (TimePassesIsEnabled)
- DebugTimer->startTimer();
-
- DIDescriptor DI(GV);
-
- // Check current version. Allow Version6 for now.
- unsigned Version = DI.getVersion();
- if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6) {
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return false;
- }
-
- unsigned Tag = DI.getTag();
- switch (Tag) {
- case DW_TAG_variable:
- assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
- break;
- case DW_TAG_compile_unit:
- assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
- break;
- case DW_TAG_subprogram:
- assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
- break;
- case DW_TAG_lexical_block:
- /// FIXME. This interfers with the qualitfy of generated code when
- /// during optimization.
- if (OptLevel != CodeGenOpt::None)
- return false;
- default:
- break;
- }
-
- if (TimePassesIsEnabled)
- DebugTimer->stopTimer();
-
- return true;
- }
-
/// RecordSourceLine - Records location information and associates it with a
/// label. Returns a unique label ID used to generate a label and provide
/// correspondence to the source line list.
MMI->EndFunction();
}
-/// ValidDebugInfo - Return true if V represents valid debug info value.
-bool DwarfWriter::ValidDebugInfo(Value *V, CodeGenOpt::Level OptLevel) {
- return DD && DD->ValidDebugInfo(V, OptLevel);
-}
-
/// RecordSourceLine - Records location information and associates it with a
/// label. Returns a unique label ID used to generate a label and provide
/// correspondence to the source line list.
/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
/// be emitted.
bool DwarfWriter::ShouldEmitDwarfDebug() const {
- return DD->ShouldEmitDwarfDebug();
+ return DD && DD->ShouldEmitDwarfDebug();
}
//// RecordInlinedFnStart - Global variable GV is inlined at the location marked
default: break;
case Intrinsic::dbg_stoppoint: {
DbgStopPointInst *SPI = cast<DbgStopPointInst>(I);
- if (DW && DW->ValidDebugInfo(SPI->getContext(), CodeGenOpt::None)) {
+ if (DIDescriptor::ValidDebugInfo(SPI->getContext(), CodeGenOpt::None)) {
DICompileUnit CU(cast<GlobalVariable>(SPI->getContext()));
unsigned Line = SPI->getLine();
unsigned Col = SPI->getColumn();
- unsigned ID = DW->RecordSourceLine(Line, Col, CU);
unsigned Idx = MF.getOrCreateDebugLocID(CU.getGV(), Line, Col);
setCurDebugLoc(DebugLoc::get(Idx));
- const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
- BuildMI(MBB, DL, II).addImm(ID);
+ if (DW && DW->ShouldEmitDwarfDebug()) {
+ unsigned ID = DW->RecordSourceLine(Line, Col, CU);
+ const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
+ BuildMI(MBB, DL, II).addImm(ID);
+ }
}
return true;
}
case Intrinsic::dbg_region_start: {
DbgRegionStartInst *RSI = cast<DbgRegionStartInst>(I);
- if (DW && DW->ValidDebugInfo(RSI->getContext(), CodeGenOpt::None)) {
+ if (DIDescriptor::ValidDebugInfo(RSI->getContext(), CodeGenOpt::None) &&
+ DW && DW->ShouldEmitDwarfDebug()) {
unsigned ID =
DW->RecordRegionStart(cast<GlobalVariable>(RSI->getContext()));
const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
}
case Intrinsic::dbg_region_end: {
DbgRegionEndInst *REI = cast<DbgRegionEndInst>(I);
- if (DW && DW->ValidDebugInfo(REI->getContext(), CodeGenOpt::None)) {
+ if (DIDescriptor::ValidDebugInfo(REI->getContext(), CodeGenOpt::None) &&
+ DW && DW->ShouldEmitDwarfDebug()) {
unsigned ID = 0;
DISubprogram Subprogram(cast<GlobalVariable>(REI->getContext()));
if (!Subprogram.isNull() && !Subprogram.describes(MF.getFunction())) {
return true;
}
case Intrinsic::dbg_func_start: {
- if (!DW) return true;
DbgFuncStartInst *FSI = cast<DbgFuncStartInst>(I);
Value *SP = FSI->getSubprogram();
+ if (!DIDescriptor::ValidDebugInfo(SP, CodeGenOpt::None))
+ return true;
- if (DW->ValidDebugInfo(SP, CodeGenOpt::None)) {
- // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
- // (most?) gdb expects.
- DebugLoc PrevLoc = DL;
- DISubprogram Subprogram(cast<GlobalVariable>(SP));
- DICompileUnit CompileUnit = Subprogram.getCompileUnit();
-
- if (!Subprogram.describes(MF.getFunction())) {
- // This is a beginning of an inlined function.
-
- // If llvm.dbg.func.start is seen in a new block before any
- // llvm.dbg.stoppoint intrinsic then the location info is unknown.
- // FIXME : Why DebugLoc is reset at the beginning of each block ?
- if (PrevLoc.isUnknown())
- return true;
- // Record the source line.
- unsigned Line = Subprogram.getLineNumber();
+ // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
+ // (most?) gdb expects.
+ DebugLoc PrevLoc = DL;
+ DISubprogram Subprogram(cast<GlobalVariable>(SP));
+ DICompileUnit CompileUnit = Subprogram.getCompileUnit();
+
+ if (!Subprogram.describes(MF.getFunction())) {
+ // This is a beginning of an inlined function.
+
+ // If llvm.dbg.func.start is seen in a new block before any
+ // llvm.dbg.stoppoint intrinsic then the location info is unknown.
+ // FIXME : Why DebugLoc is reset at the beginning of each block ?
+ if (PrevLoc.isUnknown())
+ return true;
+ // Record the source line.
+ unsigned Line = Subprogram.getLineNumber();
+ setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(
+ CompileUnit.getGV(), Line, 0)));
+
+ if (DW && DW->ShouldEmitDwarfDebug()) {
unsigned LabelID = DW->RecordSourceLine(Line, 0, CompileUnit);
- setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(
- CompileUnit.getGV(), Line, 0)));
-
const TargetInstrDesc &II = TII.get(TargetInstrInfo::DBG_LABEL);
BuildMI(MBB, DL, II).addImm(LabelID);
DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
- DW->RecordInlinedFnStart(FSI, Subprogram, LabelID,
+ DW->RecordInlinedFnStart(FSI, Subprogram, LabelID,
DICompileUnit(PrevLocTpl.CompileUnit),
PrevLocTpl.Line,
PrevLocTpl.Col);
- } else {
- // Record the source line.
- unsigned Line = Subprogram.getLineNumber();
- setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(
- CompileUnit.getGV(), Line, 0)));
+ }
+ } else {
+ // Record the source line.
+ unsigned Line = Subprogram.getLineNumber();
+ setCurDebugLoc(DebugLoc::get(MF.getOrCreateDebugLocID(
+ CompileUnit.getGV(), Line, 0)));
+ if (DW && DW->ShouldEmitDwarfDebug()) {
DW->RecordSourceLine(Line, 0, CompileUnit);
// llvm.dbg.func_start also defines beginning of function scope.
DW->RecordRegionStart(cast<GlobalVariable>(FSI->getSubprogram()));
case Intrinsic::dbg_declare: {
DbgDeclareInst *DI = cast<DbgDeclareInst>(I);
Value *Variable = DI->getVariable();
- if (DW && DW->ValidDebugInfo(Variable, CodeGenOpt::None)) {
+ if (DIDescriptor::ValidDebugInfo(Variable, CodeGenOpt::None) &&
+ DW && DW->ShouldEmitDwarfDebug()) {
// Determine the address of the declared object.
Value *Address = DI->getAddress();
if (BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
switch (F->getIntrinsicID()) {
default: break;
case Intrinsic::dbg_stoppoint: {
- DwarfWriter *DW = DAG.getDwarfWriter();
DbgStopPointInst *SPI = cast<DbgStopPointInst>(I);
- if (DW && DW->ValidDebugInfo(SPI->getContext(),
- CodeGenOpt::Default)) {
+ if (DIDescriptor::ValidDebugInfo(SPI->getContext(),
+ CodeGenOpt::Default)) {
DICompileUnit CU(cast<GlobalVariable>(SPI->getContext()));
unsigned idx = MF->getOrCreateDebugLocID(CU.getGV(),
SPI->getLine(),
break;
}
case Intrinsic::dbg_func_start: {
- DwarfWriter *DW = DAG.getDwarfWriter();
- if (DW) {
- DbgFuncStartInst *FSI = cast<DbgFuncStartInst>(I);
- Value *SP = FSI->getSubprogram();
-
- if (DW->ValidDebugInfo(SP, CodeGenOpt::Default)) {
- DISubprogram Subprogram(cast<GlobalVariable>(SP));
- DICompileUnit CU(Subprogram.getCompileUnit());
- unsigned Line = Subprogram.getLineNumber();
- DL = DebugLoc::get(MF->getOrCreateDebugLocID(CU.getGV(),
- Line, 0));
- }
+ DbgFuncStartInst *FSI = cast<DbgFuncStartInst>(I);
+ Value *SP = FSI->getSubprogram();
+
+ if (DIDescriptor::ValidDebugInfo(SP, CodeGenOpt::Default)) {
+ DISubprogram Subprogram(cast<GlobalVariable>(SP));
+ DICompileUnit CU(Subprogram.getCompileUnit());
+ unsigned Line = Subprogram.getLineNumber();
+ DL = DebugLoc::get(MF->getOrCreateDebugLocID(CU.getGV(),
+ Line, 0));
}
break;
return 0;
}
case Intrinsic::dbg_stoppoint: {
- DwarfWriter *DW = DAG.getDwarfWriter();
DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
- if (DW && DW->ValidDebugInfo(SPI.getContext(), OptLevel)) {
+ if (DIDescriptor::ValidDebugInfo(SPI.getContext(), OptLevel)) {
MachineFunction &MF = DAG.getMachineFunction();
if (OptLevel == CodeGenOpt::None)
DAG.setRoot(DAG.getDbgStopPoint(getRoot(),
DwarfWriter *DW = DAG.getDwarfWriter();
DbgRegionStartInst &RSI = cast<DbgRegionStartInst>(I);
- if (DW && DW->ValidDebugInfo(RSI.getContext(), OptLevel)) {
+ if (DIDescriptor::ValidDebugInfo(RSI.getContext(), OptLevel) &&
+ DW && DW->ShouldEmitDwarfDebug()) {
unsigned LabelID =
DW->RecordRegionStart(cast<GlobalVariable>(RSI.getContext()));
DAG.setRoot(DAG.getLabel(ISD::DBG_LABEL, getCurDebugLoc(),
DwarfWriter *DW = DAG.getDwarfWriter();
DbgRegionEndInst &REI = cast<DbgRegionEndInst>(I);
- if (DW && DW->ValidDebugInfo(REI.getContext(), OptLevel)) {
+ if (DIDescriptor::ValidDebugInfo(REI.getContext(), OptLevel) &&
+ DW && DW->ShouldEmitDwarfDebug()) {
MachineFunction &MF = DAG.getMachineFunction();
DISubprogram Subprogram(cast<GlobalVariable>(REI.getContext()));
std::string SPName;
}
case Intrinsic::dbg_func_start: {
DwarfWriter *DW = DAG.getDwarfWriter();
- if (!DW) return 0;
DbgFuncStartInst &FSI = cast<DbgFuncStartInst>(I);
Value *SP = FSI.getSubprogram();
- if (SP && DW->ValidDebugInfo(SP, OptLevel)) {
- MachineFunction &MF = DAG.getMachineFunction();
- if (OptLevel == CodeGenOpt::None) {
- // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
- // (most?) gdb expects.
- DebugLoc PrevLoc = CurDebugLoc;
- DISubprogram Subprogram(cast<GlobalVariable>(SP));
- DICompileUnit CompileUnit = Subprogram.getCompileUnit();
-
- if (!Subprogram.describes(MF.getFunction())) {
- // This is a beginning of an inlined function.
-
- // If llvm.dbg.func.start is seen in a new block before any
- // llvm.dbg.stoppoint intrinsic then the location info is unknown.
- // FIXME : Why DebugLoc is reset at the beginning of each block ?
- if (PrevLoc.isUnknown())
- return 0;
-
- // Record the source line.
- unsigned Line = Subprogram.getLineNumber();
- unsigned LabelID = DW->RecordSourceLine(Line, 0, CompileUnit);
- setCurDebugLoc(DebugLoc::get(
- MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
+ if (!DIDescriptor::ValidDebugInfo(SP, OptLevel))
+ return 0;
+
+ MachineFunction &MF = DAG.getMachineFunction();
+ if (OptLevel == CodeGenOpt::None) {
+ // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is what
+ // (most?) gdb expects.
+ DebugLoc PrevLoc = CurDebugLoc;
+ DISubprogram Subprogram(cast<GlobalVariable>(SP));
+ DICompileUnit CompileUnit = Subprogram.getCompileUnit();
+
+ if (!Subprogram.describes(MF.getFunction())) {
+ // This is a beginning of an inlined function.
+
+ // If llvm.dbg.func.start is seen in a new block before any
+ // llvm.dbg.stoppoint intrinsic then the location info is unknown.
+ // FIXME : Why DebugLoc is reset at the beginning of each block ?
+ if (PrevLoc.isUnknown())
+ return 0;
+ // Record the source line.
+ unsigned Line = Subprogram.getLineNumber();
+ setCurDebugLoc(DebugLoc::get(
+ MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
+
+ if (DW && DW->ShouldEmitDwarfDebug()) {
+ unsigned LabelID = DW->RecordSourceLine(Line, 0, CompileUnit);
DAG.setRoot(DAG.getLabel(ISD::DBG_LABEL, getCurDebugLoc(),
getRoot(), LabelID));
DebugLocTuple PrevLocTpl = MF.getDebugLocTuple(PrevLoc);
- DW->RecordInlinedFnStart(&FSI, Subprogram, LabelID,
+ DW->RecordInlinedFnStart(&FSI, Subprogram, LabelID,
DICompileUnit(PrevLocTpl.CompileUnit),
PrevLocTpl.Line,
PrevLocTpl.Col);
- } else {
- // Record the source line.
- unsigned Line = Subprogram.getLineNumber();
- setCurDebugLoc(DebugLoc::get(
- MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
+ }
+ } else {
+ // Record the source line.
+ unsigned Line = Subprogram.getLineNumber();
+ setCurDebugLoc(DebugLoc::get(
+ MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
+ if (DW && DW->ShouldEmitDwarfDebug()) {
DW->RecordSourceLine(Line, 0, CompileUnit);
// llvm.dbg.func_start also defines beginning of function scope.
DW->RecordRegionStart(cast<GlobalVariable>(FSI.getSubprogram()));
}
- } else {
- DISubprogram Subprogram(cast<GlobalVariable>(SP));
-
- std::string SPName;
- Subprogram.getLinkageName(SPName);
- if (!SPName.empty()
- && strcmp(SPName.c_str(), MF.getFunction()->getNameStart())) {
- // This is beginning of inlined function. Debugging information for
- // inlined function is not handled yet (only supported by FastISel).
- return 0;
- }
+ }
+ } else {
+ DISubprogram Subprogram(cast<GlobalVariable>(SP));
- // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is
- // what (most?) gdb expects.
- DICompileUnit CompileUnit = Subprogram.getCompileUnit();
-
- // Record the source line but does not create a label for the normal
- // function start. It will be emitted at asm emission time. However,
- // create a label if this is a beginning of inlined function.
- unsigned Line = Subprogram.getLineNumber();
- setCurDebugLoc(DebugLoc::get(
- MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
- // FIXME - Start new region because llvm.dbg.func_start also defines
- // beginning of function scope.
+ std::string SPName;
+ Subprogram.getLinkageName(SPName);
+ if (!SPName.empty()
+ && strcmp(SPName.c_str(), MF.getFunction()->getNameStart())) {
+ // This is beginning of inlined function. Debugging information for
+ // inlined function is not handled yet (only supported by FastISel).
+ return 0;
}
+
+ // llvm.dbg.func.start implicitly defines a dbg_stoppoint which is
+ // what (most?) gdb expects.
+ DICompileUnit CompileUnit = Subprogram.getCompileUnit();
+
+ // Record the source line but does not create a label for the normal
+ // function start. It will be emitted at asm emission time. However,
+ // create a label if this is a beginning of inlined function.
+ unsigned Line = Subprogram.getLineNumber();
+ setCurDebugLoc(DebugLoc::get(
+ MF.getOrCreateDebugLocID(CompileUnit.getGV(), Line, 0)));
+ // FIXME - Start new region because llvm.dbg.func_start also defines
+ // beginning of function scope.
}
return 0;
}
case Intrinsic::dbg_declare: {
if (OptLevel == CodeGenOpt::None) {
- DwarfWriter *DW = DAG.getDwarfWriter();
DbgDeclareInst &DI = cast<DbgDeclareInst>(I);
Value *Variable = DI.getVariable();
- if (DW && DW->ValidDebugInfo(Variable, OptLevel))
+ if (DIDescriptor::ValidDebugInfo(Variable, OptLevel))
DAG.setRoot(DAG.getNode(ISD::DECLARE, dl, MVT::Other, getRoot(),
getValue(DI.getAddress()), getValue(Variable)));
} else {
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