[LLVMdev] unique id for a llvm Instruction

Krzysztof Parzyszek kparzysz at codeaurora.org
Tue Sep 3 13:41:59 PDT 2013

On 8/29/2013 8:45 AM, Jonas Wagner wrote:
> You can have many pointers to the same instruction. However, the address
> in memory where that instruction lives is unique. Instruction pointers
> (or Value pointers) are thus commonly used as keys in hash tables or
> similar. Instructions or Values are almost never copied, so that you
> won't find the same instruction at different addresses in memory.

There can be a "reverse" situation: if an instruction is deleted, and 
another one is created, it can get the same address.


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