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Support ICmp/FCmp constant expression reading and writing.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32160 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2006-12-03 17:17:02 +00:00
parent 42ddd84add
commit 9f132765a2
2 changed files with 19 additions and 0 deletions
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12
lib/Bytecode/Reader/Reader.cpp
View File

@ -701,6 +701,8 @@ void BytecodeReader::ParseInstruction(std::vector<unsigned> &Oprnds,
}
case Instruction::ICmp:
case Instruction::FCmp:
if (Oprnds.size() != 3)
error("Cmp instructions requires 3 operands");
// These instructions encode the comparison predicate as the 3rd operand.
Result = CmpInst::create(Instruction::OtherOps(Opcode),
static_cast<unsigned short>(Oprnds[2]),
@ -1351,6 +1353,16 @@ Value *BytecodeReader::ParseConstantPoolValue(unsigned TypeID) {
ConstantExpr::getShuffleVector(ArgVec[0], ArgVec[1], ArgVec[2]);
if (Handler) Handler->handleConstantExpression(Opcode, ArgVec, Result);
return Result;
} else if (Opcode == Instruction::ICmp) {
if (ArgVec.size() != 2)
error("Invalid ICmp constant expr arguments");
unsigned short pred = read_vbr_uint();
return ConstantExpr::getICmp(pred, ArgVec[0], ArgVec[1]);
} else if (Opcode == Instruction::FCmp) {
if (ArgVec.size() != 2)
error("Invalid FCmp constant expr arguments");
unsigned short pred = read_vbr_uint();
return ConstantExpr::getFCmp(pred, ArgVec[0], ArgVec[1]);
} else { // All other 2-operand expressions
Constant* Result = ConstantExpr::get(Opcode, ArgVec[0], ArgVec[1]);
if (Handler) Handler->handleConstantExpression(Opcode, ArgVec, Result);

7
lib/Bytecode/Writer/Writer.cpp
View File

@ -791,6 +791,13 @@ void BytecodeWriter::outputInstruction(const Instruction &I) {
}
}
// In the weird case of the ICmp or FCmp instructions, we need to also put
// out the instruction's predicate value. We do that here, after the
// instruction's type and operands have been written so we can reuse the
// code above.
if (const CmpInst* CI = dyn_cast<CmpInst>(&I))
output_vbr((unsigned)CI->getPredicate());
// If we weren't handled before here, we either have a large number of
// operands or a large operand index that we are referring to.
outputInstructionFormat0(&I, Opcode, Table, Type);