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Use SequenceToOffsetTable in emitRegisterNameString.

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This allows suffix sharing in register names. (AX is a suffix of EAX).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153777 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-03-30 21:12:52 +00:00
parent 0d4e2ea00e
commit c19f72bd83
2 changed files with 28 additions and 8 deletions
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22
utils/TableGen/AsmWriterEmitter.cpp
View File

@ -16,6 +16,7 @@
#include "AsmWriterInst.h"
#include "CodeGenTarget.h"
#include "StringToOffsetTable.h"
#include "SequenceToOffsetTable.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/MathExtras.h"
@ -462,12 +463,12 @@ void AsmWriterEmitter::EmitPrintInstruction(raw_ostream &O) {
static void
emitRegisterNameString(raw_ostream &O, StringRef AltName,
const std::vector<CodeGenRegister*> &Registers) {
StringToOffsetTable StringTable;
O << " static const unsigned RegAsmOffset" << AltName << "[] = {\n ";
SequenceToOffsetTable<std::string> StringTable;
SmallVector<std::string, 4> AsmNames(Registers.size());
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
const CodeGenRegister &Reg = *Registers[i];
std::string &AsmName = AsmNames[i];
std::string AsmName;
// "NoRegAltName" is special. We don't need to do a lookup for that,
// as it's just a reference to the default register name.
if (AltName == "" || AltName == "NoRegAltName") {
@ -495,8 +496,17 @@ emitRegisterNameString(raw_ostream &O, StringRef AltName,
AsmName = AltNames[Idx];
}
}
StringTable.add(AsmName);
}
O << StringTable.GetOrAddStringOffset(AsmName);
StringTable.layout();
O << " static const char AsmStrs" << AltName << "[] = {\n";
StringTable.emit(O, printChar);
O << " };\n\n";
O << " static const unsigned RegAsmOffset" << AltName << "[] = {\n ";
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
O << StringTable.get(AsmNames[i]);
if (((i + 1) % 14) == 0)
O << ",\n ";
else
@ -506,10 +516,6 @@ emitRegisterNameString(raw_ostream &O, StringRef AltName,
O << "0\n"
<< " };\n"
<< "\n";
O << " const char *AsmStrs" << AltName << " =\n";
StringTable.EmitString(O);
O << ";\n";
}
void AsmWriterEmitter::EmitGetRegisterName(raw_ostream &O) {

14
utils/TableGen/SequenceToOffsetTable.h
View File

@ -21,6 +21,7 @@
#include <algorithm>
#include <vector>
#include <cassert>
#include <cctype>
namespace llvm {
@ -120,6 +121,19 @@ public:
}
};
// Helper function for SequenceToOffsetTable<string>.
static inline void printChar(raw_ostream &OS, char C) {
unsigned char UC(C);
if (isalnum(UC) || ispunct(UC)) {
OS << '\'';
if (C == '\\' || C == '\'')
OS << '\\';
OS << C << '\'';
} else {
OS << unsigned(UC);
}
}
} // end namespace llvm
#endif