Failures building glibc with mainline GCC

[Joseph Myers]

On Fri, 30 Jul 2021, Aldy Hernandez via Gcc wrote:

> There's a new jump threader in GCC which is much more aggressive, and
> may trigger latent problems with other warning passes, especially
> -Warray-bounds, -Woverflow, and -Wuninitialized.
> 
> Do your problems go away if you take out commit 2e96b5f14e?

Reverting that commit fixes all the glibc build failures except for 
x86_64-linux-gnu, i686-gnu and powerpc64le-linux-gnu.

-- 
Joseph S. Myers
joseph@codesourcery.com