[LLVMdev] LLVM 2.0 and integer signedness

Chris Lattner sabre at nondot.org
Tue Jun 26 09:22:34 PDT 2007


On Tue, 26 Jun 2007, [ISO-8859-1] Alberto González wrote:
> The problem is that what i'm instrumenting is loads and stores, plus
> function call arguments and return values, which have no signedness
> information.

Why do you need this?

-Chris

> El 26/06/2007, a las 17:03, Anton Korobeynikov escribió:
>
>> Hello, Alberto.
>>
>>> I'm using llvm for instrumenting code, and I need to know if
>>> there's a way to
>>> difference between signed and unsigned Values of integer type
>>> during an
>>> optimization pass.
>> Types are signless in LLVM 2, operations are not. So, you should
>> probably inspect insts itself, not their operands.
>>
>> --
>> With best regards, Anton Korobeynikov.
>>
>> Faculty of Mathematics & Mechanics, Saint Petersburg State University.
>>
>>
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>
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-Chris

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