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Avoid using DIDescriptor.isNull().

Browse Source 
This is a first step towards eliminating checks in Descriptor constructors.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97975 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel
2010-03-08 20:52:55 +00:00
parent ccb4f2d813
commit 3c91b05d2b
8 changed files with 128 additions and 162 deletions
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145
lib/Analysis/DebugInfo.cpp
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@ -132,13 +132,12 @@ unsigned DIVariable::getNumAddrElements() const {
/// isBasicType - Return true if the specified tag is legal for
/// DIBasicType.
bool DIDescriptor::isBasicType() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_base_type;
return DbgNode && getTag() == dwarf::DW_TAG_base_type;
}
/// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
bool DIDescriptor::isDerivedType() const {
assert(!isNull() && "Invalid descriptor!");
if (!DbgNode) return false;
switch (getTag()) {
case dwarf::DW_TAG_typedef:
case dwarf::DW_TAG_pointer_type:
@ -158,7 +157,7 @@ bool DIDescriptor::isDerivedType() const {
/// isCompositeType - Return true if the specified tag is legal for
/// DICompositeType.
bool DIDescriptor::isCompositeType() const {
assert(!isNull() && "Invalid descriptor!");
if (!DbgNode) return false;
switch (getTag()) {
case dwarf::DW_TAG_array_type:
case dwarf::DW_TAG_structure_type:
@ -175,7 +174,7 @@ bool DIDescriptor::isCompositeType() const {
/// isVariable - Return true if the specified tag is legal for DIVariable.
bool DIDescriptor::isVariable() const {
assert(!isNull() && "Invalid descriptor!");
if (!DbgNode) return false;
switch (getTag()) {
case dwarf::DW_TAG_auto_variable:
case dwarf::DW_TAG_arg_variable:
@ -194,15 +193,13 @@ bool DIDescriptor::isType() const {
/// isSubprogram - Return true if the specified tag is legal for
/// DISubprogram.
bool DIDescriptor::isSubprogram() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_subprogram;
return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
}
/// isGlobalVariable - Return true if the specified tag is legal for
/// DIGlobalVariable.
bool DIDescriptor::isGlobalVariable() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_variable;
return DbgNode && getTag() == dwarf::DW_TAG_variable;
}
/// isGlobal - Return true if the specified tag is legal for DIGlobal.
@ -213,7 +210,7 @@ bool DIDescriptor::isGlobal() const {
/// isScope - Return true if the specified tag is one of the scope
/// related tag.
bool DIDescriptor::isScope() const {
assert(!isNull() && "Invalid descriptor!");
if (!DbgNode) return false;
switch (getTag()) {
case dwarf::DW_TAG_compile_unit:
case dwarf::DW_TAG_lexical_block:
@ -228,32 +225,27 @@ bool DIDescriptor::isScope() const {
/// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
bool DIDescriptor::isCompileUnit() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_compile_unit;
return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
}
/// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
bool DIDescriptor::isNameSpace() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_namespace;
return DbgNode && getTag() == dwarf::DW_TAG_namespace;
}
/// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
bool DIDescriptor::isLexicalBlock() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_lexical_block;
return DbgNode && getTag() == dwarf::DW_TAG_lexical_block;
}
/// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
bool DIDescriptor::isSubrange() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_subrange_type;
return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
}
/// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
bool DIDescriptor::isEnumerator() const {
assert(!isNull() && "Invalid descriptor!");
return getTag() == dwarf::DW_TAG_enumerator;
return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
}
//===----------------------------------------------------------------------===//
@ -268,7 +260,8 @@ DIType::DIType(MDNode *N) : DIDescriptor(N) {
}
unsigned DIArray::getNumElements() const {
assert(DbgNode && "Invalid DIArray");
if (!DbgNode)
return 0;
return DbgNode->getNumOperands();
}
@ -276,11 +269,9 @@ unsigned DIArray::getNumElements() const {
/// this descriptor. After this completes, the current debug info value
/// is erased.
void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
if (isNull())
if (!DbgNode)
return;
assert(!D.isNull() && "Can not replace with null");
// Since we use a TrackingVH for the node, its easy for clients to manufacture
// legitimate situations where they want to replaceAllUsesWith() on something
// which, due to uniquing, has merged with the source. We shield clients from
@ -295,7 +286,7 @@ void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
/// Verify - Verify that a compile unit is well formed.
bool DICompileUnit::Verify() const {
if (isNull())
if (!DbgNode)
return false;
StringRef N = getFilename();
if (N.empty())
@ -306,36 +297,36 @@ bool DICompileUnit::Verify() const {
/// Verify - Verify that a type descriptor is well formed.
bool DIType::Verify() const {
if (isNull())
if (!DbgNode)
return false;
if (getContext().isNull())
if (!getContext().Verify())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
if (!CU.Verify())
return false;
return true;
}
/// Verify - Verify that a composite type descriptor is well formed.
bool DICompositeType::Verify() const {
if (isNull())
if (!DbgNode)
return false;
if (getContext().isNull())
if (!getContext().Verify())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
if (!CU.Verify())
return false;
return true;
}
/// Verify - Verify that a subprogram descriptor is well formed.
bool DISubprogram::Verify() const {
if (isNull())
if (!DbgNode)
return false;
if (getContext().isNull())
if (!getContext().Verify())
return false;
DICompileUnit CU = getCompileUnit();
@ -343,24 +334,24 @@ bool DISubprogram::Verify() const {
return false;
DICompositeType Ty = getType();
if (!Ty.isNull() && !Ty.Verify())
if (!Ty.Verify())
return false;
return true;
}
/// Verify - Verify that a global variable descriptor is well formed.
bool DIGlobalVariable::Verify() const {
if (isNull())
if (!DbgNode)
return false;
if (getDisplayName().empty())
return false;
if (getContext().isNull())
if (!getContext().Verify())
return false;
DICompileUnit CU = getCompileUnit();
if (!CU.isNull() && !CU.Verify())
if (!CU.Verify())
return false;
DIType Ty = getType();
@ -375,10 +366,10 @@ bool DIGlobalVariable::Verify() const {
/// Verify - Verify that a variable descriptor is well formed.
bool DIVariable::Verify() const {
if (isNull())
if (!DbgNode)
return false;
if (getContext().isNull())
if (!getContext().Verify())
return false;
DIType Ty = getType();
@ -388,6 +379,14 @@ bool DIVariable::Verify() const {
return true;
}
/// Verify - Verify that a location descriptor is well formed.
bool DILocation::Verify() const {
if (!DbgNode)
return false;
return DbgNode->getNumOperands() == 4;
}
/// getOriginalTypeSize - If this type is derived from a base type then
/// return base type size.
uint64_t DIDerivedType::getOriginalTypeSize() const {
@ -398,7 +397,7 @@ uint64_t DIDerivedType::getOriginalTypeSize() const {
DIType BaseType = getTypeDerivedFrom();
// If this type is not derived from any type then take conservative
// approach.
if (BaseType.isNull())
if (!BaseType.isValid())
return getSizeInBits();
if (BaseType.isDerivedType())
return DIDerivedType(BaseType.getNode()).getOriginalTypeSize();
@ -468,7 +467,7 @@ void DICompileUnit::dump() const {
/// dump - Print type.
void DIType::dump() const {
if (isNull()) return;
if (!DbgNode) return;
StringRef Res = getName();
if (!Res.empty())
@ -521,8 +520,6 @@ void DIDerivedType::dump() const {
/// dump - Print composite type.
void DICompositeType::dump() const {
DIArray A = getTypeArray();
if (A.isNull())
return;
dbgs() << " [" << A.getNumElements() << " elements]";
}
@ -1155,9 +1152,8 @@ void DebugInfoFinder::processModule(Module &M) {
/// processLocation - Process DILocation.
void DebugInfoFinder::processLocation(DILocation Loc) {
if (Loc.isNull()) return;
DIScope S(Loc.getScope().getNode());
if (S.isNull()) return;
if (!Loc.Verify()) return;
DIDescriptor S(Loc.getScope().getNode());
if (S.isCompileUnit())
addCompileUnit(DICompileUnit(S.getNode()));
else if (S.isSubprogram())
@ -1177,26 +1173,21 @@ void DebugInfoFinder::processType(DIType DT) {
DICompositeType DCT(DT.getNode());
processType(DCT.getTypeDerivedFrom());
DIArray DA = DCT.getTypeArray();
if (!DA.isNull())
for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
DIDescriptor D = DA.getElement(i);
DIType TyE = DIType(D.getNode());
if (!TyE.isNull())
processType(TyE);
else
processSubprogram(DISubprogram(D.getNode()));
}
for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
DIDescriptor D = DA.getElement(i);
if (D.isType())
processType(DIType(D.getNode()));
else if (D.isSubprogram())
processSubprogram(DISubprogram(D.getNode()));
}
} else if (DT.isDerivedType()) {
DIDerivedType DDT(DT.getNode());
if (!DDT.isNull())
processType(DDT.getTypeDerivedFrom());
processType(DDT.getTypeDerivedFrom());
}
}
/// processLexicalBlock
void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
if (LB.isNull())
return;
DIScope Context = LB.getContext();
if (Context.isLexicalBlock())
return processLexicalBlock(DILexicalBlock(Context.getNode()));
@ -1206,8 +1197,6 @@ void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
/// processSubprogram - Process DISubprogram.
void DebugInfoFinder::processSubprogram(DISubprogram SP) {
if (SP.isNull())
return;
if (!addSubprogram(SP))
return;
addCompileUnit(SP.getCompileUnit());
@ -1216,20 +1205,23 @@ void DebugInfoFinder::processSubprogram(DISubprogram SP) {
/// processDeclare - Process DbgDeclareInst.
void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
DIVariable DV(cast<MDNode>(DDI->getVariable()));
if (DV.isNull())
MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
if (!N) return;
DIDescriptor DV(N);
if (!DV.isVariable())
return;
if (!NodesSeen.insert(DV.getNode()))
return;
addCompileUnit(DV.getCompileUnit());
processType(DV.getType());
addCompileUnit(DIVariable(N).getCompileUnit());
processType(DIVariable(N).getType());
}
/// addType - Add type into Tys.
bool DebugInfoFinder::addType(DIType DT) {
if (DT.isNull())
if (!DT.isValid())
return false;
if (!NodesSeen.insert(DT.getNode()))
@ -1241,7 +1233,7 @@ bool DebugInfoFinder::addType(DIType DT) {
/// addCompileUnit - Add compile unit into CUs.
bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
if (CU.isNull())
if (!CU.Verify())
return false;
if (!NodesSeen.insert(CU.getNode()))
@ -1253,7 +1245,7 @@ bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
/// addGlobalVariable - Add global variable into GVs.
bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
if (DIG.isNull())
if (!DIDescriptor(DIG.getNode()).isGlobalVariable())
return false;
if (!NodesSeen.insert(DIG.getNode()))
@ -1265,7 +1257,7 @@ bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
// addSubprogram - Add subprgoram into SPs.
bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
if (SP.isNull())
if (!DIDescriptor(SP.getNode()).isSubprogram())
return false;
if (!NodesSeen.insert(SP.getNode()))
@ -1283,10 +1275,10 @@ static Value *findDbgGlobalDeclare(GlobalVariable *V) {
return 0;
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
DIGlobalVariable DIG(cast_or_null<MDNode>(NMD->getOperand(i)));
if (DIG.isNull())
DIDescriptor DIG(cast_or_null<MDNode>(NMD->getOperand(i)));
if (!DIG.isGlobalVariable())
continue;
if (DIG.getGlobal() == V)
if (DIGlobalVariable(DIG.getNode()).getGlobal() == V)
return DIG.getNode();
}
return 0;
@ -1378,12 +1370,6 @@ DebugLoc llvm::ExtractDebugLocation(DILocation &Loc,
/// getDISubprogram - Find subprogram that is enclosing this scope.
DISubprogram llvm::getDISubprogram(MDNode *Scope) {
DIDescriptor D(Scope);
if (D.isNull())
return DISubprogram();
if (D.isCompileUnit())
return DISubprogram();
if (D.isSubprogram())
return DISubprogram(Scope);
@ -1395,9 +1381,6 @@ DISubprogram llvm::getDISubprogram(MDNode *Scope) {
/// getDICompositeType - Find underlying composite type.
DICompositeType llvm::getDICompositeType(DIType T) {
if (T.isNull())
return DICompositeType();
if (T.isCompositeType())
return DICompositeType(T.getNode());