[llvm-commits] [llvm] r170016 - /llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll

[Chandler Carruth]

On Wed, Dec 12, 2012 at 12:29 PM, Bill Schmidt
<wschmidt at linux.vnet.ibm.com>wrote:

> Author: wschmidt
> Date: Wed Dec 12 14:29:20 2012
> New Revision: 170016
>
> URL: http://llvm.org/viewvc/llvm-project?rev=170016&view=rev
> Log:
> The ordering of two relocations on the same instruction is apparently not
> predictable when compiled on at least one non-PowerPC host.  Source of
> nondeterminism not apparent.  Restrict the test to build on PowerPC hosts
> for now while looking into the issue further.
>

Ow, and thanks for finding this!!! Please let folks know if we can help
track this down. Non-determinism is scary.


>
> Modified:
>     llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll
>
> Modified: llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll
> URL:
> http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll?rev=170016&r1=170015&r2=170016&view=diff
>
> ==============================================================================
> --- llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll (original)
> +++ llvm/trunk/test/CodeGen/PowerPC/tls-ld-obj.ll Wed Dec 12 14:29:20 2012
> @@ -4,6 +4,10 @@
>  ; Test correct relocation generation for thread-local storage using
>  ; the local dynamic model.
>
> +; Relocations 2 and 3 seem to come out in unpredictable order on some
> +; architectures, so restrict this for now.
> +; REQUIRES: ppc64-registered-target
> +
>  target datalayout =
> "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-f128:128:128-v128:128:128-n32:64"
>  target triple = "powerpc64-unknown-linux-gnu"
>
> @@ -17,9 +21,10 @@
>    ret i32 %0
>  }
>
> -; Verify generation of R_PPC64_GOT_TLSGD16_HA, R_PPC64_GOT_TLSGD16_LO,
> -; and R_PPC64_TLSGD for accessing external variable a, and R_PPC64_REL24
> -; for the call to __tls_get_addr.
> +; Verify generation of R_PPC64_GOT_TLSLD16_HA, R_PPC64_GOT_TLSLD16_LO,
> +; R_PPC64_TLSLD, R_PPC64_DTPREL16_HA, and R_PPC64_DTPREL16_LO for
> +; accessing external variable a, and R_PPC64_REL24 for the call to
> +; __tls_get_addr.
>  ;
>  ; CHECK:       '.rela.text'
>  ; CHECK:       Relocation 0
>
>
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