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DwarfAccelTable: Store the string symbol in the accelerator table to avoid duplicate lookup.

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This also avoids the need for subtly side-effecting calls to manifest
strings in the string table at the point where items are added to the
accelerator tables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207281 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie
2014-04-25 22:21:35 +00:00
parent 817f5e2fa1
commit 82a35bf01a
3 changed files with 39 additions and 35 deletions
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23
lib/CodeGen/AsmPrinter/DwarfAccelTable.h
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@@ -179,12 +179,18 @@ public:
};
private:
// String Data
struct DataArray {
MCSymbol *StrSym;
std::vector<HashDataContents *> Values;
};
friend struct HashData;
struct HashData {
StringRef Str;
uint32_t HashValue;
MCSymbol *Sym;
ArrayRef<HashDataContents *> Data; // offsets
HashData(StringRef S, ArrayRef<HashDataContents *> Data)
DwarfAccelTable::DataArray &Data; // offsets
HashData(StringRef S, DwarfAccelTable::DataArray &Data)
: Str(S), Data(Data) {
HashValue = DwarfAccelTable::HashDJB(S);
}
@@ -198,10 +204,10 @@ private:
else
O << "<none>";
O << "\n";
for (size_t i = 0; i < Data.size(); i++) {
O << " Offset: " << Data[i]->Die->getOffset() << "\n";
O << " Tag: " << dwarf::TagString(Data[i]->Die->getTag()) << "\n";
O << " Flags: " << Data[i]->Flags << "\n";
for (HashDataContents *C : Data.Values) {
O << " Offset: " << C->Die->getOffset() << "\n";
O << " Tag: " << dwarf::TagString(C->Die->getTag()) << "\n";
O << " Flags: " << C->Flags << "\n";
}
}
void dump() { print(dbgs()); }
@@ -226,8 +232,6 @@ private:
TableHeaderData HeaderData;
std::vector<HashData *> Data;
// String Data
typedef std::vector<HashDataContents *> DataArray;
typedef StringMap<DataArray, BumpPtrAllocator &> StringEntries;
StringEntries Entries;
@@ -240,7 +244,8 @@ private:
// Public Implementation
public:
DwarfAccelTable(ArrayRef<DwarfAccelTable::Atom>);
void AddName(StringRef, const DIE *, char = 0);
void AddName(StringRef Name, MCSymbol *StrSym, const DIE *Die,
char Flags = 0);
void FinalizeTable(AsmPrinter *, StringRef);
void Emit(AsmPrinter *, MCSymbol *, DwarfFile *);
#ifndef NDEBUG