6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-09-17 05:25:47 +00:00
Code Issues Projects Releases Wiki Activity

Initial cleanups of the param-attribute code in the bitcode reader/writer.

Browse Source 
Rename the PARAMATTR_CODE_ENTRY to PARAMATTR_CODE_ENTRY_OLD. It will be replaced
by another encoding. Keep around the current LLVM attribute encoder/decoder
code, but move it to the bitcode directories so that no one's tempted to use
them.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174335 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling
2013-02-04 23:32:23 +00:00
parent 638c63ccf7
commit f9271ea159
5 changed files with 59 additions and 66 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@@ -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));
}