[llvm-dev] clib `open` writes a linefeed to stdout when used in the JIT

edA-qa mort-ora-y via llvm-dev llvm-dev at lists.llvm.org
Sun Jul 3 03:43:17 PDT 2016

Okay, at least it's not the execution but building causing the problem.
I'm trying to locate the precise point (maybe I have an errant print

On 03/07/16 12:34, edA-qa mort-ora-y via llvm-dev wrote:
> I'm having a problem with my code generating empty lines and it appears
> to be the CLib `open` function generating an empty line when used within
> the JIT-VM.  If I compile my program to an exe file it doesn't happen. I
> also have a lot of other code running in the VM without this problem,
> it's somehow particular to `open`.
> A chunk of my IR that calls `open`:
> defer_body_26:                                    ; preds = %defer_end_11
>   %59 = load i8*, i8** %f8686688__enc_n
>   %60 = getelementptr inbounds i8, i8* %59, i64 16
>   %61 = call i32 @open(i8* %60, i32 577, i32 511)
>   store i32 %61, i32* %f8686688__f
>   br label %defer_block_25
> Where elsewhere I have `declare i32 @open(i8*, i32, i32)`.
> Any ideas on what could possible be causing this?
> I'm using LLVM3.8 with GCC 5.3.1 on Ubuntu 16.04.

edA-qa mort-ora-y 

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