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Add support to emit debug info for C++0x nullptr type.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-09-14 23:13:28 +00:00
parent e1d58a6556
commit 734a67cda5
4 changed files with 42 additions and 5 deletions
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3
include/llvm/Analysis/DIBuilder.h
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@ -97,6 +97,9 @@ namespace llvm {
/// createEnumerator - Create a single enumerator value.
DIEnumerator createEnumerator(StringRef Name, uint64_t Val);
/// createNullPtrType - Create C++0x nullptr type.
DIType createNullPtrType(StringRef Name);
/// createBasicType - Create debugging information entry for a basic
/// type.
/// @param Name Type name.

20
lib/Analysis/DIBuilder.cpp
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@ -146,6 +146,26 @@ DIEnumerator DIBuilder::createEnumerator(StringRef Name, uint64_t Val) {
return DIEnumerator(MDNode::get(VMContext, Elts));
}
/// createNullPtrType - Create C++0x nullptr type.
DIType DIBuilder::createNullPtrType(StringRef Name) {
assert(!Name.empty() && "Unable to create type without name");
// nullptr is encoded in DIBasicType format. Line number, filename,
// ,size, alignment, offset and flags are always empty here.
Value *Elts[] = {
GetTagConstant(VMContext, dwarf::DW_TAG_unspecified_type),
NULL, //TheCU,
MDString::get(VMContext, Name),
NULL, // Filename
ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Line
ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Size
ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Align
ConstantInt::get(Type::getInt64Ty(VMContext), 0), // Offset
ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Flags;
ConstantInt::get(Type::getInt32Ty(VMContext), 0), // Encoding
};
return DIType(MDNode::get(VMContext, Elts));
}
/// createBasicType - Create debugging information entry for a basic
/// type, e.g 'char'.
DIType DIBuilder::createBasicType(StringRef Name, uint64_t SizeInBits,

9
lib/Analysis/DebugInfo.cpp
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@ -130,7 +130,14 @@ MDNode *DIVariable::getInlinedAt() const {
/// isBasicType - Return true if the specified tag is legal for
/// DIBasicType.
bool DIDescriptor::isBasicType() const {
return DbgNode && getTag() == dwarf::DW_TAG_base_type;
if (!DbgNode) return false;
switch (getTag()) {
case dwarf::DW_TAG_base_type:
case dwarf::DW_TAG_unspecified_type:
return true;
default:
return false;
}
}
/// isDerivedType - Return true if the specified tag is legal for DIDerivedType.

15
lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
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@ -658,13 +658,20 @@ void CompileUnit::addPubTypes(DISubprogram SP) {
void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
// Get core information.
StringRef Name = BTy.getName();
Buffer.setTag(dwarf::DW_TAG_base_type);
addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
BTy.getEncoding());
// Add name if not anonymous or intermediate type.
if (!Name.empty())
addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
if (BTy.getTag() == dwarf::DW_TAG_unspecified_type) {
Buffer.setTag(dwarf::DW_TAG_unspecified_type);
// Unspecified types has only name, nothing else.
return;
}
Buffer.setTag(dwarf::DW_TAG_base_type);
addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
BTy.getEncoding());
uint64_t Size = BTy.getSizeInBits() >> 3;
addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
}