[LLVMdev] Problem running program with LLVM JIT

[John Criswell]

Karhu, Abhinav R wrote:
> Hey all,
> I compiled the code using both the -c and -S options. I can get the human readable IR but I still cannot run it using lli.
>   
You need to assemble the human-readable IR into bitcode before it can be 
executed with lli.  To assemble the bitcode, use the llvm-as tool.

FYI, using the -c option with -emit-llvm option in llvm-gcc/llvm-g++ 
will automatically generate an LLVM bitcode file instead of an LLVM 
assembly file.  You may find this faster than compiling to LLVM 
assembly, then assembling with llvm-as, and then running with lli.

The following worked for me on my Linux machine:

llvm-gcc -c -emit-llvm test.c
lli test.o

-- John T.

> The output of the IR looks like this. Can some of the information tell me about why the program is not running.
>
> ; ModuleID = 'Hel.c'
> target datalayout = "e-p:32:32"
> target endian = little
> target pointersize = 32
> target triple = "i686-pc-linux-gnu"
> %str = internal constant [10 x sbyte] c"Hey there\00"           ; <[10 x sbyte]*> [#uses=1]
>
> implementation   ; Functions:
>
> int %main() {
> entry:
>         %retval = alloca int, align 4           ; <int*> [#uses=2]
>         %tmp = alloca int, align 4              ; <int*> [#uses=2]
>
> These are the lines of code I guess which will have all the information that is causing the error.
>
> Some enlightenment on this please.
>
> --
> Abhinav Karhu
> MS Computer Science
> Georgia Institute of Technology
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