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Patch 10 for long double. Doing constants right needs expanding ConstantFP

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to handle values bigger than double.  If we assume host==target and host
long double works correctly, this is not too bad, but we don't want to
have that limitation longterm.  I could implement accepting double
constants as long double or something like that, which would lead to
incorrect codegen with no errors; the more I think about that the worse
it seems.  Rather than do such a hack that would be backed out later,
I'm settling for giving reasonable error messages, for now.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40974 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen
2007-08-09 22:51:36 +00:00
parent a3231ba237
commit ebbc95da49
3 changed files with 28 additions and 7 deletions
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12
lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -525,11 +525,17 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
}
} else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(C)) {
Code = bitc::CST_CODE_FLOAT;
if (CFP->getType() == Type::FloatTy) {
const Type *Ty = CFP->getType();
if (Ty == Type::FloatTy) {
Record.push_back(FloatToBits((float)CFP->getValue()));
} else {
assert (CFP->getType() == Type::DoubleTy && "Unknown FP type!");
} else if (Ty == Type::DoubleTy) {
Record.push_back(DoubleToBits((double)CFP->getValue()));
// FIXME: make long double constants work.
} else if (Ty == Type::X86_FP80Ty ||
Ty == Type::FP128Ty || Ty == Type::PPC_FP128Ty) {
assert (0 && "Long double constants not handled yet.");
} else {
assert (0 && "Unknown FP type!");
}
} else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
// Emit constant strings specially.