[LLVMdev] How to get the left-hand operand of an instruction?
qqsmallpig at gmail.com
Tue Apr 6 06:37:53 CDT 2010
I have catched your reply and solved the problem. Thank you for the
2010/4/6 Duncan Sands <baldrick at free.fr>
> Hi increaseing, please ask on the list rather than writing to me directly.
> That way others can answer, and the discussion is archived for the benefit
> of people with the same question in the future.
> Best wishes,
> I have another question:
>> If I want to catch the point pointing to an allocated regin using malloc
>> and its length(for example, x.p and n in the next statement), what
>> should I do?
>> x.p = malloc(n);
>> Thank you very much!
>> Best Regards!
>> 2010/4/6 Duncan Sands <baldrick at free.fr <mailto:baldrick at free.fr>>
>> Hi Qiuping yi,
>> > I am a new novice of LLVM, and I want know how to get the left-hand
>> > operand of an instruction?
>> > For example:
>> > how to get the %temp2 operand in the next instruction:
>> > %temp2 = malloc i8, i32 %n
>> there is no left-hand side, temp2 is just a name for the instruction.
>> Since the LLVM IR is in SSA form, registers have exactly one
>> and thus there is no point in distinguishing between a register and the
>> instruction that defines it. In short, whenever you would like to make
>> use of "%temp2", just use the instruction ("malloc i8, i32 %n")
>> LLVM Developers mailing list
>> LLVMdev at cs.uiuc.edu <mailto:LLVMdev at cs.uiuc.edu>
>> http://llvm.cs.uiuc.edu <http://llvm.cs.uiuc.edu/>
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