[m-dev.] stage 2 broken with --intermod-opt and -O5

[Zoltan Somogyi]

On Thu, 23 Jul 2026 15:30:03 +1000, Julien Fischer <jfischer at opturion.com> wrote:
> On Thu, 23 Jul 2026 at 09:06, Zoltan Somogyi <zoltan.somogyi at runbox.com> wrote:
> > I would guess that disabling deforestation just for make_hlds_passes.m
> > would work around this bug.
> 
> Unfortunately not. The module also fails to compile with -O2 --intermod-opt.
> Turning off intermodule optimization or inlining is required to get
> it to compile in asm_fast.gc.

I tested adding --no-deforestation for make_hlds_passes. to compiler/Mercury.options,
and then it bootstrapped with -O5  --intermod-opt. That's why I committed that change.

The bug could be in inlining, because deforestation itself invokes inlining. I will take
a look.

Zoltan.