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Construct compile unit dies using DebugInfo.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61768 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-01-05 23:03:32 +00:00
parent de0e7f2481
commit d1ca925093
1 changed files with 70 additions and 1 deletions
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71
lib/CodeGen/AsmPrinter/DwarfWriter.cpp
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@ -18,7 +18,7 @@
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/DerivedTypes.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
@ -59,6 +59,43 @@ static const unsigned InitValuesSetSize = 9; // 512
class DIE;
class DIEValue;
//===----------------------------------------------------------------------===//
/// Utility routines.
///
/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
/// specified value in their initializer somewhere.
static void
getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
// Scan though value users.
for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
// If the user is a GlobalVariable then add to result.
Result.push_back(GV);
} else if (Constant *C = dyn_cast<Constant>(*I)) {
// If the user is a constant variable then scan its users
getGlobalVariablesUsing(C, Result);
}
}
}
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
static void
getGlobalVariablesUsing(Module &M, const std::string &RootName,
std::vector<GlobalVariable*> &Result) {
std::vector<const Type*> FieldTypes;
FieldTypes.push_back(Type::Int32Ty);
FieldTypes.push_back(Type::Int32Ty);
// Get the GlobalVariable root.
GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
StructType::get(FieldTypes));
// If present and linkonce then scan for users.
if (UseRoot && UseRoot->hasLinkOnceLinkage())
getGlobalVariablesUsing(UseRoot, Result);
}
//===----------------------------------------------------------------------===//
/// DWLabel - Labels are used to track locations in the assembler file.
/// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
@ -743,6 +780,11 @@ private:
std::vector<DIE *> Dies;
public:
CompileUnit(unsigned I, DIE *D)
: ID(I), Die(D), DescToDieMap(), GVToDieMap(), DescToDIEntryMap(),
GVToDIEntryMap(), Globals(), DiesSet(InitDiesSetSize), Dies()
{}
CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
: Desc(CUD)
, ID(I)
@ -3074,6 +3116,33 @@ private:
Asm->EOL();
}
/// ConstructCompileUnitDIEs - Create a compile unit DIEs.
void ConstructCompileUnits() {
std::string CUName = "llvm.dbg.compile_units";
std::vector<GlobalVariable*> Result;
getGlobalVariablesUsing(*M, CUName, Result);
for (std::vector<GlobalVariable *>::iterator RI = Result.begin(),
RE = Result.end(); RI != RE; ++RI) {
DICompileUnit *DIUnit = new DICompileUnit(*RI);
unsigned DID = Directories.insert(DIUnit->getDirectory());
unsigned ID = SrcFiles.insert(SrcFileInfo(DID,
DIUnit->getFilename()));
DIE *Die = new DIE(DW_TAG_compile_unit);
AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
DWLabel("section_line", 0), DWLabel("section_line", 0),
false);
AddString(Die, DW_AT_producer, DW_FORM_string, DIUnit->getProducer());
AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit->getLanguage());
AddString(Die, DW_AT_name, DW_FORM_string, DIUnit->getFilename());
if (!DIUnit->getDirectory().empty())
AddString(Die, DW_AT_comp_dir, DW_FORM_string, DIUnit->getDirectory());
CompileUnit *Unit = new CompileUnit(ID, Die);
DW_CUs[DIUnit->getGV()] = Unit;
}
}
/// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
/// header file.
void ConstructCompileUnitDIEs() {