Re: [PATCH v8 07/12] Enable musttail tail conversion even when not optimizing

[Andi Kleen]

On Mon, Jul 08, 2024 at 08:53:27AM +0200, Richard Biener wrote:
> Ah, I see.  So this pass is responsible for both -O0 and
> -fno-optimized-sibling-calls.
> But I'm quite sure the other pass doesn't run with -O0
> -foptimize-sibling-calls, does it?

It does run:

./cc1 -O0 -fdump-passes -foptimize-sibling-calls t.c 2>&1 | grep tail
         tree-tailr1                                   :  ON
      tree-tailr2                                      :  ON
      tree-tailc                                       :  ON

But I suspect without the earlier expand patch to adjust the cfg rebuild it may
ICE on some of the targets.

-Andi