[LLVMdev] problem with sgt's on Sparc machine (original) (raw)

Christine Cheng clcheng at stanford.edu
Thu Sep 15 11:06:25 PDT 2011

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.

Best, Christine

On Thu, Sep 15, 2011 at 10:20 AM, Duncan Sands <baldrick at free.fr> wrote:

Hi,

> target datalayout = > "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32-n8:16:32" > target triple = "i386-pc-linux-gnu" if you are using this target data layout and triple on a Sparc machine, I'm not surprised you get wrong results. Ciao, Duncan. > > @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 > ------------------------------------------------------------------------------------------------------------------- > > On Sparc I get: > 1 > 1 > 0 > 0 > 1 > 1 > 1 > > On X86 I get all 1's which I believe is correct. > > I used the following command to compile on sparc: > llc -march=sparc llvmprint.bc -o llvmprint.s ( on a x86 machine) > /usr/sfw/bin/gcc -mcpu=v9 -mtune=v9 llvmprint.s -o llvmprint (on sparc) > > > Could anyone give me some clue about what's going on? Is 'sgt' not working for > loaded values? > > Thanks, > > Christine > > > _> ________________________ > LLVM Developers mailing list > LLVMdev at cs.uiuc.edu http://llvm.cs.uiuc.edu > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev

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