[LLVMdev] get ref to parent instruction
erocha.ssa at gmail.com
Tue Jan 8 16:09:42 PST 2013
Thanks for your reply. I once tried to use Value::replaceAllUsesWith() but
it'd break my code.
On Jan 8, 2013 9:34 PM, "Eli Friedman" <eli.friedman at gmail.com> wrote:
> On Tue, Jan 8, 2013 at 3:06 PM, Eduardo <erocha.ssa at gmail.com> wrote:
> > Hi all,
> > How can I get a reference to an instruction if I have a reference to
> > an operand? For example, let suppose I have a reference to the
> > ConstantExpr "getelementptr inbounds" in the following instruction:
> > %4 = getelementptr i32* getelementptr inbounds ([8 x i32]*
> > @__mem_grid_MOD_nnyp, i32 0, i32 0), i32 %3
> > then, how can I get a reference to the GetElementPtrInst object?
> > The reason I need that is because I want to change every instruction
> > that uses certain variables (in the example above the
> > __mem_grid_MOD_nnyp variable). The problem is that for the example I
> > showed the actual user of the variable is a ConstantExpr object and
> > not the GetElementPtrInst object.
> You can use Value::use_begin()/use_end() recursively.
> That said, have you looked at Value::replaceAllUsesWith()?
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