diff options
Diffstat (limited to 'lib/VMCore/AsmWriter.cpp')
| -rw-r--r-- | lib/VMCore/AsmWriter.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp index b59ec0863b..6a17516be2 100644 --- a/lib/VMCore/AsmWriter.cpp +++ b/lib/VMCore/AsmWriter.cpp @@ -640,6 +640,7 @@ static void WriteConstantInt(raw_ostream &Out, const Constant *CV, // make sure that we only output it in exponential format if we can parse // the value back and get the same value. // + bool ignored; bool isDouble = &CFP->getValueAPF().getSemantics()==&APFloat::IEEEdouble; double Val = isDouble ? CFP->getValueAPF().convertToDouble() : CFP->getValueAPF().convertToFloat(); @@ -659,11 +660,20 @@ static void WriteConstantInt(raw_ostream &Out, const Constant *CV, } } // Otherwise we could not reparse it to exactly the same value, so we must - // output the string in hexadecimal format! + // output the string in hexadecimal format! Note that loading and storing + // floating point types changes the bits of NaNs on some hosts, notably + // x86, so we must not use these types. assert(sizeof(double) == sizeof(uint64_t) && "assuming that double is 64 bits!"); char Buffer[40]; - Out << "0x" << utohex_buffer(uint64_t(DoubleToBits(Val)), Buffer+40); + APFloat apf = CFP->getValueAPF(); + // Floats are represented in ASCII IR as double, convert. + if (!isDouble) + apf.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, + &ignored); + Out << "0x" << + utohex_buffer(uint64_t(apf.bitcastToAPInt().getZExtValue()), + Buffer+40); return; } |