[llvm] r315044 - Roll forward r314928

[Xinliang David Li via llvm-commits]

On Fri, Oct 6, 2017 at 4:08 PM, Reid Kleckner <rnk at google.com> wrote:

> On Fri, Oct 6, 2017 at 2:50 PM, Xinliang David Li <davidxl at google.com>
> wrote:
>
>> On Fri, Oct 6, 2017 at 2:20 PM, Reid Kleckner <rnk at google.com> wrote:
>>
>>> This appears to have caused a bootstrap failure on Windows:
>>> http://lab.llvm.org:8011/builders/clang-x64-ninja-win7/builds/6884
>>> http://lab.llvm.org:8011/builders/clang-x86-windows-msvc2015/builds/7611
>>>
>>> I am going to revert and try to reproduce. It looks like clang ends up
>>> emitting an error on valid code.
>>>
>>
>> Please help with the reproducible -- it will be hard for me to get a
>> repro on windows.
>>
>
> Can you build clang with your patch and try to compile this code?
>
> char *f(char *p, int i) {
>   return p + i;
> }
>
> If clang says:
> t.c:2:12: error: invalid operands to binary expression ('char *' and 'int')
>   return p + i;
>          ~ ^ ~
> 1 error generated.
>
> Then you have the miscompile locally and it doesn't require Windows.
>



How is the self build compiler built? I have one built with RelWithDebInfo,
and that compiler compiles this case fine without an error.

David
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