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1

I am working on LLVM backend and was wondering if there is any way by which I can access the value stored SDValue so I can either assign it as a literal or move it to register in an user defined instruction.

Something like:
SDValue Value = Op->getOperand(2);

intValue = Value.get_integer_value //get Value as an int

and then

if ( intValue > 31)

Thanks,
Ambuj

2

I am working on LLVM backend and was wondering if there is any way by which I can access the value stored SDValue so I can either assign it as a literal or move it to register in an user defined instruction.

Something like:
SDValue Value = Op->getOperand(2);

intValue = Value.get_integer_value //get Value as an int

and then

if ( intValue > 31)

emit udi 0,0,0,intValue

else
{

emit

load v1,intValue
udi v1,0,0,0
}

3

Hi Ambuj,

SDValue Value = Op->getOperand(2);

intValue = Value.get_integer_value //get Value as an int

If you know for some reason that it actually is a constant, you can
write "Op->getConstantOperandVal(2)". If not, you obviously have to
check that before trying to get the value. The usual idiom is
something like:

    uint64_t IntVal = -1;
    if (auto *CN = dyn_cast<ConstantSDNode>(Value))
      IntVal = CN->getZExtValue(); // Or some other accessor.

Cheers.

Tim.