[llvm] r288051 - [StructurizeCFG] Use range-based for loops.

[Justin Lebar via llvm-commits]

Thank you for the testcase (and for bisecting this).  I have a fix;
I'm just reducing this testcase now.

On Tue, Nov 29, 2016 at 12:12 AM, Michel Dänzer <michel at daenzer.net> wrote:
>
> Hi Justin,
>
>
> On 29/11/16 03:50 AM, Justin Lebar via llvm-commits wrote:
>> Author: jlebar
>> Date: Mon Nov 28 12:50:03 2016
>> New Revision: 288051
>>
>> URL: http://llvm.org/viewvc/llvm-project?rev=288051&view=rev
>> Log:
>> [StructurizeCFG] Use range-based for loops.
>>
>> Reviewers: arsenm
>>
>> Subscribers: wdng, llvm-commits
>>
>> Differential Revision: https://reviews.llvm.org/D27000
>
> This change caused an infinite loop in StructurizeCFG::rebuildSSA when
> running the piglit test arb_shader_image_load_store-shader-mem-barrier
> with the radeonsi driver. You can reproduce it by feeding the attached
> LLVM IR to
>
> llc -march=amdgcn -mcpu=kaveri
>
>
> --
> Earthling Michel Dänzer               |               http://www.amd.com
> Libre software enthusiast             |             Mesa and X developer