diff options
Diffstat (limited to 'lib/Bitcode/Reader')
| -rw-r--r-- | lib/Bitcode/Reader/BitcodeReader.cpp | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/lib/Bitcode/Reader/BitcodeReader.cpp b/lib/Bitcode/Reader/BitcodeReader.cpp index ca299c007c..6ab7011187 100644 --- a/lib/Bitcode/Reader/BitcodeReader.cpp +++ b/lib/Bitcode/Reader/BitcodeReader.cpp @@ -428,6 +428,26 @@ Type *BitcodeReader::getTypeByID(unsigned ID) { // Functions for parsing blocks from the bitcode file //===----------------------------------------------------------------------===// + +/// \brief This fills an AttrBuilder object with the LLVM attributes that have +/// been decoded from the given integer. This function must stay in sync with +/// 'encodeLLVMAttributesForBitcode'. +static void decodeLLVMAttributesForBitcode(AttrBuilder &B, + uint64_t EncodedAttrs) { + // FIXME: Remove in 4.0. + + // The alignment is stored as a 16-bit raw value from bits 31--16. We shift + // the bits above 31 down by 11 bits. + unsigned Alignment = (EncodedAttrs & (0xffffULL << 16)) >> 16; + assert((!Alignment || isPowerOf2_32(Alignment)) && + "Alignment must be a power of two."); + + if (Alignment) + B.addAlignmentAttr(Alignment); + B.addRawValue(((EncodedAttrs & (0xffffULL << 32)) >> 11) | + (EncodedAttrs & 0xffff)); +} + bool BitcodeReader::ParseAttributeBlock() { if (Stream.EnterSubBlock(bitc::PARAMATTR_BLOCK_ID)) return Error("Malformed block record"); @@ -459,14 +479,14 @@ bool BitcodeReader::ParseAttributeBlock() { switch (Stream.readRecord(Entry.ID, Record)) { default: // Default behavior: ignore. break; - case bitc::PARAMATTR_CODE_ENTRY: { // ENTRY: [paramidx0, attr0, ...] + case bitc::PARAMATTR_CODE_ENTRY_OLD: { // ENTRY: [paramidx0, attr0, ...] + // FIXME: Remove in 4.0. if (Record.size() & 1) return Error("Invalid ENTRY record"); for (unsigned i = 0, e = Record.size(); i != e; i += 2) { AttrBuilder B; - AttributeFuncs::decodeLLVMAttributesForBitcode(Context, B, - Record[i+1]); + decodeLLVMAttributesForBitcode(B, Record[i+1]); Attrs.push_back(AttributeSet::get(Context, Record[i], B)); } |