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Allow bytecode files to refer directly to global values as constants, instead

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of forcing them to go through ConstantPointerRef's.  This allows bytecode
files to mirror .ll files, allows more efficient encoding, and makes it easier
to eventually eliminate CPR's.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10883 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-15 18:45:25 +00:00
parent ff47e7d02e
commit 933619912b
1 changed files with 6 additions and 2 deletions
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8
lib/Bytecode/Reader/Reader.cpp
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@ -151,6 +151,10 @@ Constant *BytecodeParser::getConstantValue(unsigned TypeSlot, unsigned Slot) {
if (Value *V = getValue(TypeSlot, Slot, false))
if (Constant *C = dyn_cast<Constant>(V))
return C; // If we already have the value parsed, just return it
else if (GlobalValue *GV = dyn_cast<GlobalValue>(V))
// ConstantPointerRef's are an abomination, but at least they don't have
// to infest bytecode files.
return ConstantPointerRef::get(GV);
else
throw std::string("Reference of a value is expected to be a constant!");
@ -637,10 +641,10 @@ void BytecodeParser::ParseModule(const unsigned char *Buf,
// Look up the initializer value...
// FIXME: Preserve this type ID!
unsigned TypeSlot = getTypeSlot(GV->getType()->getElementType());
if (Value *V = getValue(TypeSlot, Slot, false)) {
if (Constant *CV = getConstantValue(TypeSlot, Slot)) {
if (GV->hasInitializer())
throw std::string("Global *already* has an initializer?!");
GV->setInitializer(cast<Constant>(V));
GV->setInitializer(CV);
} else
throw std::string("Cannot find initializer value.");
}