r338749 - Work around more GCC miscompiles exposed by r338464.

[Martin Storsjö via cfe-commits]

Hans,

I think this commit should be merged to the 7.0 release branch; the first 
half of the GCC workaround made it in before the branch happened, but 
there was another identical case missing.

// Martin

On Thu, 2 Aug 2018, Martin Storsjo via cfe-commits wrote:

> Author: mstorsjo
> Date: Thu Aug  2 11:12:08 2018
> New Revision: 338749
>
> URL: http://llvm.org/viewvc/llvm-project?rev=338749&view=rev
> Log:
> Work around more GCC miscompiles exposed by r338464.
>
> This is the same fix as in r338478, for another occurrance of the
> same pattern from r338464.
>
> See gcc.gnu.org/PR86769 for details of the bug.