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add abbrevs for binops and casts. This shrinks a testcase from 725132->682500

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bytes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36829 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-05-06 02:38:57 +00:00
parent e8e1e4bf8a
commit f9f2e83170
1 changed files with 29 additions and 3 deletions

32
lib/Bitcode/Writer/BitcodeWriter.cpp

@ -45,6 +45,8 @@ enum {
// FUNCTION_BLOCK abbrev id's.
FUNCTION_INST_LOAD_ABBREV = bitc::FIRST_APPLICATION_ABBREV,
FUNCTION_INST_BINOP_ABBREV,
FUNCTION_INST_CAST_ABBREV,
FUNCTION_INST_RET_VOID_ABBREV,
FUNCTION_INST_RET_VAL_ABBREV,
FUNCTION_INST_UNREACHABLE_ABBREV
@ -662,13 +664,15 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
default:
if (Instruction::isCast(I.getOpcode())) {
Code = bitc::FUNC_CODE_INST_CAST;
PushValueAndType(I.getOperand(0), InstID, Vals, VE);
if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
AbbrevToUse = FUNCTION_INST_CAST_ABBREV;
Vals.push_back(VE.getTypeID(I.getType()));
Vals.push_back(GetEncodedCastOpcode(I.getOpcode()));
} else {
assert(isa<BinaryOperator>(I) && "Unknown instruction!");
Code = bitc::FUNC_CODE_INST_BINOP;
PushValueAndType(I.getOperand(0), InstID, Vals, VE);
if (!PushValueAndType(I.getOperand(0), InstID, Vals, VE))
AbbrevToUse = FUNCTION_INST_BINOP_ABBREV;
Vals.push_back(VE.getValueID(I.getOperand(1)));
Vals.push_back(GetEncodedBinaryOpcode(I.getOpcode()));
}
@ -895,7 +899,7 @@ static void WriteValueSymbolTable(const ValueSymbolTable &VST,
/// WriteFunction - Emit a function body to the module stream.
static void WriteFunction(const Function &F, ValueEnumerator &VE,
BitstreamWriter &Stream) {
Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 3);
Stream.EnterSubblock(bitc::FUNCTION_BLOCK_ID, 4);
VE.incorporateFunction(F);
SmallVector<unsigned, 64> Vals;
@ -1072,6 +1076,28 @@ static void WriteBlockInfo(const ValueEnumerator &VE, BitstreamWriter &Stream) {
Abbv) != FUNCTION_INST_LOAD_ABBREV)
assert(0 && "Unexpected abbrev ordering!");
}
{ // INST_BINOP abbrev for FUNCTION_BLOCK.
BitCodeAbbrev *Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_BINOP));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // LHS
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // RHS
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
Abbv) != FUNCTION_INST_BINOP_ABBREV)
assert(0 && "Unexpected abbrev ordering!");
}
{ // INST_CAST abbrev for FUNCTION_BLOCK.
BitCodeAbbrev *Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_CAST));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // OpVal
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, // dest ty
Log2_32_Ceil(VE.getTypes().size()+1)));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 4)); // opc
if (Stream.EmitBlockInfoAbbrev(bitc::FUNCTION_BLOCK_ID,
Abbv) != FUNCTION_INST_CAST_ABBREV)
assert(0 && "Unexpected abbrev ordering!");
}
{ // INST_RET abbrev for FUNCTION_BLOCK.
BitCodeAbbrev *Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::FUNC_CODE_INST_RET));