On Tue, May 05, 2020 at 03:53:45PM +0200, Arnd Bergmann wrote:
> When building for ARMv7-M, clang-9 or higher tries to unroll some loops,
> which ends up confusing the register allocator to the point of generating
> rather bad code and using more than the warning limit for stack frames:
>
>
On Fri, May 08, 2020 at 11:31:07PM +0200, Arnd Bergmann wrote:
> On Wed, May 6, 2020 at 7:12 AM Nathan Chancellor
> wrote:
> > > -
> > > +#ifdef CONFIG_CC_IS_CLANG
> >
> > Given your comment in the bug:
> >
> > "The code is written to assume no loops are unrolled"
> >
> > Does it make sense to
On Wed, May 6, 2020 at 7:12 AM Nathan Chancellor
wrote:
> > -
> > +#ifdef CONFIG_CC_IS_CLANG
>
> Given your comment in the bug:
>
> "The code is written to assume no loops are unrolled"
>
> Does it make sense to make this unconditional and take compiler
> heuristics out of it?
>
> > +#pragma
On Tue, May 05, 2020 at 03:53:45PM +0200, Arnd Bergmann wrote:
> When building for ARMv7-M, clang-9 or higher tries to unroll some loops,
> which ends up confusing the register allocator to the point of generating
> rather bad code and using more than the warning limit for stack frames:
>
>
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