[LLVMdev] problem with sgt's on Sparc machine

[Venkatraman Govindaraju]

Hello,

  What is your LLVM version? Also, can you attach the assembly generated?

Thanks,
Venkatraman

On Thu, Sep 15, 2011 at 5:20 PM, Bruno Cardoso Lopes
<bruno.cardoso at gmail.com> wrote:
> Hi,
>
> On Thu, Sep 15, 2011 at 3:15 PM, Christine Cheng <clcheng at stanford.edu> wrote:
>> Hi guys,
>>
>> Thanks for the input. However, it seems that the code still produces the
>> wrong output on a Sparc machine.
>>
>> My current llvm_print.bc code is:
>> --------------------------------------------------------------------------------------------------
>> ; MduleID = '<stdin>'
>> target datalayout =
>> "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-n32"
>> target triple = "sparc-unknown-linux"
>>
>> @P = global i32 1
>> @dP = global i32 1
>>
>> @.str = private constant [4 x i8] c"%d\0A\00", align 1
>>
>> define i32 @main() nounwind {
>>
>> entry:
>>     %. = load i32* @P, align 4
>>     %t1 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 %. ) nounwind
>>     %d. = load i32* @dP, align 4
>>     %t2 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 %d. ) nounwind
>>     %0 = icmp sgt i32 %., 0
>>   %1 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr inbounds
>> ([4 x i8]* @.str, i32 0, i32 0), i1 %0 ) nounwind
>>     %2 = icmp sgt i32 %d., 0
>>     %3 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i1 %2 ) nounwind
>>     %t3 = icmp eq i32 %d., %d.
>>     %t4 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i1 %t3 ) nounwind
>>     %4 = icmp sgt i32 1, 0
>>     %5 = icmp sgt i32 1, 0
>>     %6 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i1 %4 ) nounwind
>>     %7 = tail call i32 (i8*, ...)* @printf(i8* noalias getelementptr
>> inbounds ([4 x i8]* @.str, i32 0, i32 0), i1 %5 ) nounwind
>>   ret i32 undef
>> }
>>
>> declare i32 @printf(i8* nocapture, ...) nounwind
>>
>> --------------------------------------------------------------------------------------------------
>>
>> The output is still:
>>
>> 1
>> 1
>> 0
>> 0
>> 1
>> 1
>> 1
>>
>> which should be all ones. Is there a sign error somewhere?
>
> Please file a bug to llvm.org/bugs
> I don't know of anyone working on Sparc right now, so if you could dig
> and find out what llvm is generating wrong, someone may provide a fix
> faster. Or if you're willing to right a patch that would be even
> better! :)
>
> --
> Bruno Cardoso Lopes
> http://www.brunocardoso.cc
>
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