[LLVMdev] Instruction Conversion

John Criswell criswell at uiuc.edu
Sat May 9 12:38:34 PDT 2009

Rotem Varon wrote:
> Hi,
> Let say i am writing a code inside basic block pass and iterating all 
> the instructions inside,
> and i encountered in this instruction :
If you're asking how to get the operands of an Instruction, use the 
getOperand() method:

Value * Operand1 = I->getOperand(0);
Value * Operand2 = I->getOperand(1);

The LLVM doxygen documentation (http://llvm.org/doxygen/) is an 
invaluable resource.  You may also want to read the Programmer's Guide 

Does this answer your question?

-- John T.

> %3 = add i32 %1, 2
> I want to convert this instruction to something like this:
> add R1, 2, R3
> I know the opocode, but i what i need is, the operands %1 and 2 (in 
> this example).
> I will be grateful if some one will tell me how to do so .

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