6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-06-13 04:38:24 +00:00
Code Issues Projects Releases Wiki Activity

add a new Blob encoding abbreviation for bitcode files that emits

Browse Source 
elements in a form that is efficient for the reader to just get a
pointer in memory and start reading.  APIs to do efficient reading
and writing are still todo.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68465 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-04-06 21:50:39 +00:00
parent 8f3434647d
commit dcd006bf7b
4 changed files with 56 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
include/llvm/Bitcode/BitstreamWriter.h
View File

@ -319,11 +319,7 @@ public:
assert(RecordIdx < Vals.size() && "Invalid abbrev/record");
EmitAbbreviatedLiteral(Op, Vals[RecordIdx]);
++RecordIdx;
} else if (Op.getEncoding() != BitCodeAbbrevOp::Array) {
assert(RecordIdx < Vals.size() && "Invalid abbrev/record");
EmitAbbreviatedField(Op, Vals[RecordIdx]);
++RecordIdx;
} else {
} else if (Op.getEncoding() == BitCodeAbbrevOp::Array) {
// Array case.
assert(i+2 == e && "array op not second to last?");
const BitCodeAbbrevOp &EltEnc = Abbv->getOperandInfo(++i);
@ -334,6 +330,26 @@ public:
// Emit each field.
for (; RecordIdx != Vals.size(); ++RecordIdx)
EmitAbbreviatedField(EltEnc, Vals[RecordIdx]);
} else if (Op.getEncoding() == BitCodeAbbrevOp::Blob) {
// Emit a vbr6 to indicate the number of elements present.
EmitVBR(static_cast<uint32_t>(Vals.size()-RecordIdx), 6);
// Flush to a 32-bit alignment boundary.
FlushToWord();
assert((Out.size() & 3) == 0 && "Not 32-bit aligned");
// Emit each field as a literal byte.
for (; RecordIdx != Vals.size(); ++RecordIdx) {
assert(Vals[RecordIdx] < 256 && "Value too large to emit as blob");
Out.push_back((unsigned char)Vals[RecordIdx]);
}
// Align end to 32-bits.
while (Out.size() & 3)
Out.push_back(0);
} else { // Single scalar field.
assert(RecordIdx < Vals.size() && "Invalid abbrev/record");
EmitAbbreviatedField(Op, Vals[RecordIdx]);
++RecordIdx;
}
}
assert(RecordIdx == Vals.size() && "Not all record operands emitted!");