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Remove a bunch of cruft that was used to be backwards compatible with the last

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prerelease format for LLVM bytecode files.  Now we only are compatible with
LLVM 1.0+.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12643 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2004-04-03 23:43:42 +00:00
parent 43cb041754
commit 9dd8770609
3 changed files with 23 additions and 92 deletions
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31
lib/Bytecode/Reader/Reader.cpp
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@ -353,8 +353,7 @@ void BytecodeParser::materializeFunction(Function* F) {
GlobalValue::LinkageTypes Linkage = GlobalValue::ExternalLinkage;
unsigned LinkageType = read_vbr_uint(Buf, EndBuf);
if ((!hasExtendedLinkageSpecs && LinkageType > 3) ||
( hasExtendedLinkageSpecs && LinkageType > 4))
if (LinkageType > 4)
throw std::string("Invalid linkage type for Function.");
switch (LinkageType) {
case 0: Linkage = GlobalValue::ExternalLinkage; break;
@ -553,21 +552,12 @@ void BytecodeParser::ParseModuleGlobalInfo(const unsigned char *&Buf,
// Read global variables...
unsigned VarType = read_vbr_uint(Buf, End);
while (VarType != Type::VoidTyID) { // List is terminated by Void
unsigned SlotNo;
// VarType Fields: bit0 = isConstant, bit1 = hasInitializer, bit2,3,4 =
// Linkage, bit4+ = slot#
unsigned SlotNo = VarType >> 5;
unsigned LinkageID = (VarType >> 2) & 7;
GlobalValue::LinkageTypes Linkage;
unsigned LinkageID;
if (hasExtendedLinkageSpecs) {
// VarType Fields: bit0 = isConstant, bit1 = hasInitializer,
// bit2,3,4 = Linkage, bit4+ = slot#
SlotNo = VarType >> 5;
LinkageID = (VarType >> 2) & 7;
} else {
// VarType Fields: bit0 = isConstant, bit1 = hasInitializer,
// bit2,3 = Linkage, bit4+ = slot#
SlotNo = VarType >> 4;
LinkageID = (VarType >> 2) & 3;
}
switch (LinkageID) {
default: assert(0 && "Unknown linkage type!");
case 0: Linkage = GlobalValue::ExternalLinkage; break;
@ -655,20 +645,10 @@ void BytecodeParser::ParseVersionInfo(const unsigned char *&Buf,
RevisionNum = Version >> 4;
// Default values for the current bytecode version
hasExtendedLinkageSpecs = true;
hasOldStyleVarargs = false;
hasVarArgCallPadding = false;
hasInconsistentModuleGlobalInfo = false;
hasExplicitPrimitiveZeros = false;
switch (RevisionNum) {
case 2: // LLVM pre-1.0 release: will be deleted on the next rev
// Version #2 only supported 4 linkage types. It didn't support weak
// linkage.
hasExtendedLinkageSpecs = false;
hasOldStyleVarargs = true;
hasVarArgCallPadding = true;
// FALL THROUGH
case 0: // LLVM 1.0, 1.1 release version
// Compared to rev #2, we added support for weak linkage, a more dense
// encoding, and better varargs support.
@ -789,7 +769,6 @@ void BytecodeParser::ParseBytecode(const unsigned char *Buf, unsigned Length,
TheModule = new Module(ModuleID);
try {
usesOldStyleVarargs = false;
ParseModule(Buf, EndBuf);
} catch (std::string &Error) {
freeState(); // Must destroy handles before deleting module!