Re: [Patch, lra] PR70751, correct the cost for spilling non-pseudo into memory

[Jiong Wang <jiong dot wang at foss dot arm dot com>]

On 27/06/16 17:26, Dominik Vogt wrote:
> On Thu, Jun 09, 2016 at 09:52:39AM -0600, Jeff Law wrote:
> > On 06/08/2016 10:47 AM, Jiong Wang wrote:
> > > As discussed on the PR
> > >
> > >   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70751,
> > >
> > > here is the patch.
> This commit has introduced an ICE with s390x, march=z13.  Is it a
> backend bug or one in the middleend?
>
> -- x.c --
> void foo(int *n, int off, int *m)
> {
>    int i;
>
>    for(i = 0 ;i <= 3; i++)
>      {
>        n[off + i] = m[2 * i];
>        n[off + 7 - i] = m[2 * i + 1];
>      }
> }
> -- snip --
>
>    $ gcc -S -O3 -march=z13 x.c
> x.c: In function âfooâ:
> x.c:10:1: internal compiler error: Max. number of generated reload insns per insn is achieved (90)

I tried the following on gcc trunk (r237817, 28-June-2016), can't 
reproduce the issue.

configure --target=s390-linux
./cc1 -O3 1.c -nostdinc -march=z13

Can you please paste "gcc -v -S -O3 -march=z13 x.c" to see what's passed 
to cc1?

Thanks.