6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-08-24 09:29:42 +00:00
Code Issues Projects Releases Wiki Activity

If the front end has emitted llvm.dbg.cu and other debug info anchors (clang does it now) then use them directly. This saves one scan of entire module, to collect debug info, which in turns saves few machine cycles at compile time.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130759 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2011-05-03 16:45:22 +00:00
parent 464f4ef2bd
commit 30692abac7
1 changed files with 49 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -1113,44 +1113,66 @@ void DwarfDebug::beginModule(Module *M) {
if (DisableDebugInfoPrinting)
return;
DebugInfoFinder DbgFinder;
DbgFinder.processModule(*M);
bool HasDebugInfo = false;
// Scan all the compile-units to see if there are any marked as the main unit.
// if not, we do not generate debug info.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
E = DbgFinder.compile_unit_end(); I != E; ++I) {
if (DICompileUnit(*I).isMain()) {
// If module has named metadata anchors then use them, otherwise scan the module
// using debug info finder to collect debug info.
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (CU_Nodes) {
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
HasDebugInfo = true;
break;
constructCompileUnit(CU_Nodes->getOperand(i));
}
if (!HasDebugInfo)
return;
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv"))
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
constructGlobalVariableDIE(NMD->getOperand(i));
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.sp"))
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
constructSubprogramDIE(NMD->getOperand(i));
} else {
DebugInfoFinder DbgFinder;
DbgFinder.processModule(*M);
// Scan all the compile-units to see if there are any marked as the main unit.
// if not, we do not generate debug info.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
E = DbgFinder.compile_unit_end(); I != E; ++I) {
if (DICompileUnit(*I).isMain()) {
HasDebugInfo = true;
break;
}
}
// Create all the compile unit DIEs.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
E = DbgFinder.compile_unit_end(); I != E; ++I)
constructCompileUnit(*I);
// Create DIEs for each global variable.
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
E = DbgFinder.global_variable_end(); I != E; ++I)
constructGlobalVariableDIE(*I);
// Create DIEs for each subprogram.
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
E = DbgFinder.subprogram_end(); I != E; ++I)
constructSubprogramDIE(*I);
}
if (!HasDebugInfo) return;
// Tell MMI that we have debug info.
MMI->setDebugInfoAvailability(true);
// Emit initial sections.
EmitSectionLabels();
// Create all the compile unit DIEs.
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
E = DbgFinder.compile_unit_end(); I != E; ++I)
constructCompileUnit(*I);
// Create DIEs for each global variable.
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
E = DbgFinder.global_variable_end(); I != E; ++I)
constructGlobalVariableDIE(*I);
// Create DIEs for each subprogram.
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
E = DbgFinder.subprogram_end(); I != E; ++I)
constructSubprogramDIE(*I);
//getOrCreateTypeDIE
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum"))
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {