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Implement writing of arbitrary precision integers.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34717 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-02-28 02:25:20 +00:00
parent 38c91a9927
commit 9abd138a30
1 changed files with 14 additions and 4 deletions
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18
lib/Bytecode/Writer/Writer.cpp
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@ -307,13 +307,23 @@ void BytecodeWriter::outputConstant(const Constant *CPV) {
switch (CPV->getType()->getTypeID()) {
case Type::IntegerTyID: { // Integer types...
const ConstantInt *CI = cast<ConstantInt>(CPV);
unsigned NumBits = cast<IntegerType>(CPV->getType())->getBitWidth();
if (NumBits <= 32)
output_vbr(uint32_t(cast<ConstantInt>(CPV)->getZExtValue()));
output_vbr(uint32_t(CI->getZExtValue()));
else if (NumBits <= 64)
output_vbr(uint64_t(cast<ConstantInt>(CPV)->getZExtValue()));
else
assert(0 && "Integer types > 64 bits not supported.");
output_vbr(uint64_t(CI->getZExtValue()));
else {
// We have an arbitrary precision integer value to write whose
// bit width is > 64. However, in canonical unsigned integer
// format it is likely that the high bits are going to be zero.
// So, we only write the number of active words.
uint32_t activeWords = CI->getValue().getActiveWords();
const uint64_t *rawData = CI->getValue().getRawData();
output_vbr(activeWords);
for (uint32_t i = 0; i < activeWords; ++i)
output_vbr(rawData[i]);
}
break;
}