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Remove DwarfDebug::FirstCU as it has no use

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It was only being used as a flag to identify the lack of debug info from
within endModule - use the section labels for that instead.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220575 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-10-24 17:53:38 +00:00
parent a46f06efe2
commit 3ad7d41947
2 changed files with 5 additions and 17 deletions
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16
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
View File

@ -169,8 +169,7 @@ static LLVM_CONSTEXPR DwarfAccelTable::Atom TypeAtoms[] = {
DwarfAccelTable::Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)}; DwarfAccelTable::Atom(dwarf::DW_ATOM_type_flags, dwarf::DW_FORM_data1)};
DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
: Asm(A), MMI(Asm->MMI), FirstCU(nullptr), PrevLabel(nullptr), : Asm(A), MMI(Asm->MMI), PrevLabel(nullptr), GlobalRangeCount(0),
GlobalRangeCount(0),
InfoHolder(A, *this, "info_string", DIEValueAllocator), InfoHolder(A, *this, "info_string", DIEValueAllocator),
UsedNonDefaultText(false), UsedNonDefaultText(false),
SkeletonHolder(A, *this, "skel_string", DIEValueAllocator), SkeletonHolder(A, *this, "skel_string", DIEValueAllocator),
@ -403,9 +402,6 @@ DwarfCompileUnit &DwarfDebug::constructDwarfCompileUnit(DICompileUnit DIUnit) {
NewCU.addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers, NewCU.addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
dwarf::DW_FORM_data1, RVer); dwarf::DW_FORM_data1, RVer);
if (!FirstCU)
FirstCU = &NewCU;
if (useSplitDwarf()) { if (useSplitDwarf()) {
NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoDWOSection(), NewCU.initSection(Asm->getObjFileLowering().getDwarfInfoDWOSection(),
DwarfInfoDWOSectionSym); DwarfInfoDWOSectionSym);
@ -438,8 +434,6 @@ void DwarfDebug::beginModule() {
FunctionDIs = makeSubprogramMap(*M); FunctionDIs = makeSubprogramMap(*M);
// 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"); NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
if (!CU_Nodes) if (!CU_Nodes)
return; return;
@ -687,7 +681,10 @@ void DwarfDebug::endModule() {
assert(CurFn == nullptr); assert(CurFn == nullptr);
assert(CurMI == nullptr); assert(CurMI == nullptr);
if (!FirstCU) // If we aren't actually generating debug info (check beginModule -
// conditionalized on !DisableDebugInfoPrinting and the presence of the
// llvm.dbg.cu metadata node)
if (!DwarfInfoSectionSym)
return; return;
// End any existing sections. // End any existing sections.
@ -741,9 +738,6 @@ void DwarfDebug::endModule() {
// clean up. // clean up.
SPMap.clear(); SPMap.clear();
AbstractVariables.clear(); AbstractVariables.clear();
// Reset these for the next Module if we have one.
FirstCU = nullptr;
} }
// Find abstract variable, if any, associated with Var. // Find abstract variable, if any, associated with Var.

6
lib/CodeGen/AsmPrinter/DwarfDebug.h
View File

@ -164,12 +164,6 @@ class DwarfDebug : public AsmPrinterHandler {
// All DIEValues are allocated through this allocator. // All DIEValues are allocated through this allocator.
BumpPtrAllocator DIEValueAllocator; BumpPtrAllocator DIEValueAllocator;
// Handle to the compile unit used for the inline extension handling,
// this is just so that the DIEValue allocator has a place to store
// the particular elements.
// FIXME: Store these off of DwarfDebug instead?
DwarfCompileUnit *FirstCU;
// Maps MDNode with its corresponding DwarfCompileUnit. // Maps MDNode with its corresponding DwarfCompileUnit.
MapVector<const MDNode *, DwarfCompileUnit *> CUMap; MapVector<const MDNode *, DwarfCompileUnit *> CUMap;