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For PR761: 

Remove the Endianness and PointerSize fields from the ModuleHeader and
replace it with the DataLayout field.

llvm-svn: 33529
This commit is contained in:
Reid Spencer 2007-01-26 08:10:24 +00:00
parent 6a8d4eab6a
commit 675fb2301f
3 changed files with 16 additions and 36 deletions
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8
llvm/lib/Bytecode/Reader/Analyzer.cpp
View File

@ -142,14 +142,10 @@ public:
}
virtual void handleVersionInfo(
unsigned char RevisionNum, ///< Byte code revision number
Module::Endianness Endianness, ///< Endianness indicator
Module::PointerSize PointerSize ///< PointerSize indicator
unsigned char RevisionNum ///< Byte code revision number
) {
if (os)
*os << " RevisionNum: " << int(RevisionNum)
<< " Endianness: " << Endianness
<< " PointerSize: " << PointerSize << "\n";
*os << " RevisionNum: " << int(RevisionNum) << "\n";
bca.version = RevisionNum;
}

28
llvm/lib/Bytecode/Reader/Reader.cpp
View File

@ -2014,6 +2014,13 @@ void BytecodeReader::ParseModuleGlobalInfo() {
if (Handler)
Handler->handleTargetTriple(triple);
// Read the data layout string and place into the module.
std::string datalayout = read_str();
TheModule->setDataLayout(datalayout);
// FIXME: Implement
// if (Handler)
// Handler->handleDataLayout(datalayout);
if (At != BlockEnd) {
// If the file has section info in it, read the section names now.
unsigned NumSections = read_vbr_uint();
@ -2045,31 +2052,14 @@ void BytecodeReader::ParseModuleGlobalInfo() {
/// Parse the version information and decode it by setting flags on the
/// Reader that enable backward compatibility of the reader.
void BytecodeReader::ParseVersionInfo() {
unsigned Version = read_vbr_uint();
// Unpack version number: low four bits are for flags, top bits = version
Module::Endianness Endianness;
Module::PointerSize PointerSize;
Endianness = (Version & 1) ? Module::BigEndian : Module::LittleEndian;
PointerSize = (Version & 2) ? Module::Pointer64 : Module::Pointer32;
bool hasNoEndianness = Version & 4;
bool hasNoPointerSize = Version & 8;
RevisionNum = Version >> 4;
unsigned RevisionNum = read_vbr_uint();
// We don't provide backwards compatibility in the Reader any more. To
// upgrade, the user should use llvm-upgrade.
if (RevisionNum < 7)
error("Bytecode formats < 7 are no longer supported. Use llvm-upgrade.");
if (hasNoEndianness) Endianness = Module::AnyEndianness;
if (hasNoPointerSize) PointerSize = Module::AnyPointerSize;
TheModule->setEndianness(Endianness);
TheModule->setPointerSize(PointerSize);
if (Handler) Handler->handleVersionInfo(RevisionNum, Endianness, PointerSize);
if (Handler) Handler->handleVersionInfo(RevisionNum);
}
/// Parse a whole module.

16
llvm/lib/Bytecode/Writer/Writer.cpp
View File

@ -813,17 +813,8 @@ BytecodeWriter::BytecodeWriter(std::vector<unsigned char> &o, const Module *M)
// Emit the top level CLASS block.
BytecodeBlock ModuleBlock(BytecodeFormat::ModuleBlockID, *this, false, true);
bool isBigEndian = M->getEndianness() == Module::BigEndian;
bool hasLongPointers = M->getPointerSize() == Module::Pointer64;
bool hasNoEndianness = M->getEndianness() == Module::AnyEndianness;
bool hasNoPointerSize = M->getPointerSize() == Module::AnyPointerSize;
// Output the version identifier and other information.
unsigned Version = (BCVersionNum << 4) |
(unsigned)isBigEndian | (hasLongPointers << 1) |
(hasNoEndianness << 2) |
(hasNoPointerSize << 3);
output_vbr(Version);
// Output the version identifier
output_vbr(BCVersionNum);
// The Global type plane comes first
{
@ -1091,6 +1082,9 @@ void BytecodeWriter::outputModuleInfoBlock(const Module *M) {
// Output the target triple from the module
output(M->getTargetTriple());
// Output the data layout from the module
output(M->getDataLayout());
// Emit the table of section names.
output_vbr((unsigned)SectionNames.size());
for (unsigned i = 0, e = SectionNames.size(); i != e; ++i)