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Make a provision to encode inline location in a variable. This will enable dwarf writer to easily distinguish between two instances of a inlined variable in one basic block. 

llvm-svn: 135457
This commit is contained in:
Devang Patel 2011-07-19 01:03:32 +00:00
parent 206f5093e3
commit ac532dedf1
4 changed files with 32 additions and 5 deletions
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11
llvm/include/llvm/Analysis/DebugInfo.h
View File

@ -628,7 +628,9 @@ namespace llvm {
uint64_t getAddrElement(unsigned Idx) const {
if (getVersion() <= llvm::LLVMDebugVersion8)
return getUInt64Field(Idx+6);
return getUInt64Field(Idx+7);
if (getVersion() == llvm::LLVMDebugVersion9)
return getUInt64Field(Idx+7);
return getUInt64Field(Idx+8);
}
/// isBlockByrefVariable - Return true if the variable was declared as
@ -716,6 +718,13 @@ namespace llvm {
/// suitable to hold function specific information.
NamedMDNode *getFnSpecificMDNode(const Module &M, StringRef Name);
/// createInlinedVariable - Create a new inlined variable based on current
/// variable.
/// @param DV Current Variable.
/// @param InlinedScope Location at current variable is inlined.
DIVariable createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
LLVMContext &VMContext);
class DebugInfoFinder {
public:
/// processModule - Process entire module and collect debug info

5
llvm/include/llvm/Support/Dwarf.h
View File

@ -22,8 +22,9 @@ namespace llvm {
// Debug info constants.
enum {
LLVMDebugVersion = (9 << 16), // Current version of debug information.
LLVMDebugVersion8 = (8 << 16), // Cconstant for version 8.
LLVMDebugVersion = (10 << 16), // Current version of debug information.
LLVMDebugVersion9 = (9 << 16), // Constant for version 9.
LLVMDebugVersion8 = (8 << 16), // Constant for version 8.
LLVMDebugVersion7 = (7 << 16), // Constant for version 7.
LLVMDebugVersion6 = (6 << 16), // Constant for version 6.
LLVMDebugVersion5 = (5 << 16), // Constant for version 5.

4
llvm/lib/Analysis/DIBuilder.cpp
View File

@ -626,7 +626,8 @@ DIVariable DIBuilder::createLocalVariable(unsigned Tag, DIDescriptor Scope,
File,
ConstantInt::get(Type::getInt32Ty(VMContext), (LineNo | (ArgNo << 24))),
Ty,
ConstantInt::get(Type::getInt32Ty(VMContext), Flags)
ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
Constant::getNullValue(Type::getInt32Ty(VMContext)),
};
MDNode *Node = MDNode::get(VMContext, Elts);
if (AlwaysPreserve) {
@ -661,6 +662,7 @@ DIVariable DIBuilder::createComplexVariable(unsigned Tag, DIDescriptor Scope,
Elts.push_back(ConstantInt::get(Type::getInt32Ty(VMContext), (LineNo | (ArgNo << 24))));
Elts.push_back(Ty);
Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
Elts.append(Addr.begin(), Addr.end());
return DIVariable(MDNode::get(VMContext, Elts));

17
llvm/lib/Analysis/DebugInfo.cpp
View File

@ -111,7 +111,9 @@ Function *DIDescriptor::getFunctionField(unsigned Elt) const {
unsigned DIVariable::getNumAddrElements() const {
if (getVersion() <= llvm::LLVMDebugVersion8)
return DbgNode->getNumOperands()-6;
return DbgNode->getNumOperands()-7;
if (getVersion() == llvm::LLVMDebugVersion9)
return DbgNode->getNumOperands()-7;
return DbgNode->getNumOperands()-8;
}
@ -760,6 +762,19 @@ NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, StringRef FuncName) {
return M.getOrInsertNamedMetadata(Name.str());
}
/// createInlinedVariable - Create a new inlined variable based on current
/// variable.
/// @param DV Current Variable.
/// @param InlinedScope Location at current variable is inlined.
DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
LLVMContext &VMContext) {
SmallVector<Value *, 16> Elts;
// Insert inlined scope as 7th element.
for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
i == 7 ? Elts.push_back(InlinedScope) :
Elts.push_back(DV->getOperand(i));
return DIVariable(MDNode::get(VMContext, Elts));
}
//===----------------------------------------------------------------------===//
// DebugInfoFinder implementations.