[Bug tree-optimization/105769] [11/12/13 Regression] program segmentation fault with -ftree-vectorize and nested lambdas

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105769

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #10)
> I think that's the usual pattern for the two other stack-slot sharing PRs we
> have.  The liveness analysis makes wrong assumptions about CLOBBER and
> CLOBBER
> isn't a barrier for address-takens (and we don't have birth CLOBBERs).
> 
> But why does -fstack-reuse=none not help?

Because -fstack-reuse= controls behavior of the gimplifier/inliner (what kind
of CLOBBERs are emitted), not whether we reuse stack slots during expansion or
not.
And the CLOBBERs that matter here aren't coming from the -fstack-reuse=
controlled
ones, but from C++ lifetime DSE.

-flifetime-dse=1 option works as workaround in this case.