[llvm] r310510 - [SimplifyCFG] remove checks for crasher test from r310481

[Alex L via llvm-commits]

Also reproduces locally with clang-900.0.27. Doesn't look like a miscompile.

On 10 August 2017 at 12:15, Alex L <arphaman at gmail.com> wrote:

> Our bot used clang-800.0.42.1 and had the same IR as Sanjay.
>
> On 10 August 2017 at 11:57, Davide Italiano via llvm-commits <
> llvm-commits at lists.llvm.org> wrote:
>
>> On Thu, Aug 10, 2017 at 12:43 AM, Davide Italiano <davide at freebsd.org>
>> wrote:
>> > On Wed, Aug 9, 2017 at 12:42 PM, Sanjay Patel <spatel at rotateright.com>
>> wrote:
>> >> The IR difference is real - it seems to depend on whether you're
>> building
>> >> debug or release.
>> >>
>> >> This didn't change if I specified triple+layout with:
>> >> target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
>> >> target triple = "x86_64-unknown-linux-gnu"
>> >>
>> >> Here's what I show using a debug build of opt on x86-64 on macOS (note:
>> >> different blocks, different phi, etc):
>> >
>> > While I think this is unrelated to the change, it's an annoying piece
>> > of non-determinism.
>> > I'll try to shed some light on it today.
>> >
>> > Thanks,
>> >
>>
>> I'm finally able to reproduce this.
>> It reproduces only on MacOS (not on Linux nor Windows), when building
>> trunk (debug/release) with the following compiler:
>>
>> $ clang --version
>> Apple LLVM version 7.3.0 (clang-703.0.31)
>> Target: x86_64-apple-darwin15.4.0
>> Thread model: posix
>> InstalledDir: /Applications/Xcode.app/Conten
>> ts/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
>>
>> Does this match the version you have? I'll consider building with a
>> different compiler on Mac (e.g. GCC) because this could possibly be a
>> miscompile introduced by the LLVM clang shipped by Apple.
>>
>> Thanks,
>>
>> --
>> Davide
>> _______________________________________________
>> llvm-commits mailing list
>> llvm-commits at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-commits
>>
>
>
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