[LLVMdev] problem with sgt's on Sparc machine

[Christine Cheng]

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?

Thanks a lot!

Christine


On Thu, Sep 15, 2011 at 11:28 AM, Bruno Cardoso Lopes <
bruno.cardoso at gmail.com> wrote:

> On Thu, Sep 15, 2011 at 11:06 AM, Christine Cheng <clcheng at stanford.edu>
> wrote:
> > Hi Duncan,
> >
> > Thanks for the reply! There is no LLVM on the Sparc machine so I cannot
> > compile my code there into .s file. How shall I modify the target data
> > layout and triple so it works on Sparc? Basically I got these from
> compiling
> > C code using llvm-gcc.
>
> You can use clang for that:
> clang -ccc-host-triple sparc-unknown-linux -ccc-clang-archs sparc ...
>
>
> --
> Bruno Cardoso Lopes
> http://www.brunocardoso.cc
>
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