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Store an optional section start label in MCSection.

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This makes code that uses section relative expressions (debug info) simpler and
less brittle.

This is still a bit awkward as the symbol is created late and has to be
stored in a mutable field.

I will move the symbol creation earlier in the next patch.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231802 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-03-10 16:58:10 +00:00
parent f681b3f13f
commit 0f4df6dc6f
14 changed files with 105 additions and 143 deletions
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15
lib/CodeGen/AsmPrinter/DwarfAccelTable.cpp
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@@ -180,7 +180,7 @@ void DwarfAccelTable::EmitHashes(AsmPrinter *Asm) {
// element in each bucket. This is done via a symbol subtraction from the
// beginning of the section. The non-section symbol will be output later
// when we emit the actual data.
void DwarfAccelTable::EmitOffsets(AsmPrinter *Asm, MCSymbol *SecBegin) {
void DwarfAccelTable::emitOffsets(AsmPrinter *Asm, const MCSymbol *SecBegin) {
uint64_t PrevHash = UINT64_MAX;
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
for (HashList::const_iterator HI = Buckets[i].begin(),
@@ -203,8 +203,7 @@ void DwarfAccelTable::EmitOffsets(AsmPrinter *Asm, MCSymbol *SecBegin) {
// Walk through the buckets and emit the full data for each element in
// the bucket. For the string case emit the dies and the various offsets.
// Terminate each HashData bucket with 0.
void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfDebug *D,
MCSymbol *StrSym) {
void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfDebug *D) {
for (size_t i = 0, e = Buckets.size(); i < e; ++i) {
uint64_t PrevHash = UINT64_MAX;
for (HashList::const_iterator HI = Buckets[i].begin(),
@@ -217,7 +216,7 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfDebug *D,
// Remember to emit the label for our offset.
Asm->OutStreamer.EmitLabel((*HI)->Sym);
Asm->OutStreamer.AddComment((*HI)->Str);
Asm->EmitSectionOffset((*HI)->Data.StrSym, StrSym);
Asm->emitSectionOffset((*HI)->Data.StrSym);
Asm->OutStreamer.AddComment("Num DIEs");
Asm->EmitInt32((*HI)->Data.Values.size());
for (HashDataContents *HD : (*HI)->Data.Values) {
@@ -241,8 +240,8 @@ void DwarfAccelTable::EmitData(AsmPrinter *Asm, DwarfDebug *D,
}
// Emit the entire data structure to the output file.
void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin, DwarfDebug *D,
MCSymbol *StrSym) {
void DwarfAccelTable::emit(AsmPrinter *Asm, const MCSymbol *SecBegin,
DwarfDebug *D) {
// Emit the header.
EmitHeader(Asm);
@@ -253,10 +252,10 @@ void DwarfAccelTable::Emit(AsmPrinter *Asm, MCSymbol *SecBegin, DwarfDebug *D,
EmitHashes(Asm);
// Emit the offsets.
EmitOffsets(Asm, SecBegin);
emitOffsets(Asm, SecBegin);
// Emit the hash data.
EmitData(Asm, D, StrSym);
EmitData(Asm, D);
}
#ifndef NDEBUG