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PR12696: Attribute bits above 1<<30 are not encoded in bitcode

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Attribute bits above 1<<30 are now encoded correctly.  Additionally,
the encoding/decoding functionality has been hoisted to helper functions
in Attributes.h in an effort to help the encoding/decoding to stay in
sync with the Attribute bitcode definitions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157581 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Meador Inge
2012-05-28 15:45:43 +00:00
parent f52aea8bc2
commit e99f8be067
4 changed files with 211 additions and 26 deletions
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13
lib/Bitcode/Writer/BitcodeWriter.cpp
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@ -177,18 +177,7 @@ static void WriteAttributeTable(const ValueEnumerator &VE,
for (unsigned i = 0, e = A.getNumSlots(); i != e; ++i) {
const AttributeWithIndex &PAWI = A.getSlot(i);
Record.push_back(PAWI.Index);
// FIXME: remove in LLVM 3.0
// Store the alignment in the bitcode as a 16-bit raw value instead of a
// 5-bit log2 encoded value. Shift the bits above the alignment up by
// 11 bits.
uint64_t FauxAttr = PAWI.Attrs.Raw() & 0xffff;
if (PAWI.Attrs & Attribute::Alignment)
FauxAttr |= (1ull<<16)<<
(((PAWI.Attrs & Attribute::Alignment).Raw()-1) >> 16);
FauxAttr |= (PAWI.Attrs.Raw() & (0x3FFull << 21)) << 11;
Record.push_back(FauxAttr);
Record.push_back(Attribute::encodeLLVMAttributesForBitcode(PAWI.Attrs));
}
Stream.EmitRecord(bitc::PARAMATTR_CODE_ENTRY, Record);