llvm dev - Jun 2012 - [LLVMdev] getting identifier for alloca instruction and basic blocks

Hello,

How can I retrieve the identifier in a alloca instruction?

In the AllocaInst class there is no method to get this info so I
assumed that the actual value name for the instruction is the
identifier but when I have something like:

%1 = alloca %"mystruct", align 8

When calling the function Value::getName() I get the empty string.
What should I do to retrieve the "%1"?

Also, in the basic blocks how can I retrieve the label identifier?


Thanks,
Marcelo

Hi Marcelo,
> How can I retrieve the identifier in a alloca instruction?
except for globals, identifier names in LLVM IR are only there to make the IR
easier to read: they are optional and can't be relied upon to exist, or to
mean
anything or be "correct" if they exist.  Use debug info to map things
back to
variable names in the original code.

Ciao, Duncan.
>
> In the AllocaInst class there is no method to get this info so I
> assumed that the actual value name for the instruction is the
> identifier but when I have something like:
>
> %1 = alloca %"mystruct", align 8
>
> When calling the function Value::getName() I get the empty string.
> What should I do to retrieve the "%1"?
>
> Also, in the basic blocks how can I retrieve the label identifier?
>
>
> Thanks,
> Marcelo
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