Sir ,how can I get the variable %2 in instruction
%2 = sub nsw i32 1, %yIf I am using getName() function then it outputs the null string.
How can I get the original name?
Regards,
Rajwinder Singh
What would you need the name for? If you're using the C++ API you
just pass it as a Value* to the IRBuilder API.
Reid
RAJWINDER SINGH wrote:
Sir ,how can I get the variable %2 in instruction
%2 = sub nsw i32 1, %y If I am using getName() function then it outputs the null string.
How can I get the original name?
I don't believe the instruction has a name. The LLVM disassembler just assigns a numeric name when generating the .ll file so that the output is readable by a human.
What is it that you are trying to do that requires that name of an SSA value?
-- John T.
Hello Rajwinder,
When you are using numbered registers there is no name to get. Names are optional in LLVM.
–Sam
RAJWINDER SINGH wrote:
I am making a CDFG graph out of the instruction.
What is a CDFG? Do you mean a control dependence graph? Control-dependence can be computed utilizing the PostDominatorTree pass.
for that purpose I require the name because
if I am using its ID then ID may be same for the two such variables.
What do you mean by an instruction's ID?
How can I distinguish b/w them?
I'm assuming that you're writing an LLVM analysis pass that creates this CDFG data structure as an internal, in-memory data structure. If that is the case, then you simply use the pointer to the Instruction object to identify it. Each Instruction object inhabits a different location in memory; therefore, pointers to them are unique.
-- John T.