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Re: [PATCH] Properly register dead cgraph_nodes in passes.c.

On 8/9/19 6:41 AM, Martin Liška wrote:
> Hi.
> The patch prevents crashes caused by fact that do_per_function_toporder
> uses get_uid () to register all dead cgraph_nodes. That does not work
> now as cgraph_nodes are directly released via ggc_free and so that one
> will see a garbage here. Second steps is to register all cgraph hooks
> and correctly hold add removed nodes. Doing that we'll not need the GGC nodes
> array.
> Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
> I can also build xalancbmk with -O2 -ffast-math where I previously saw
> the ICE.
> Ready to be installed?
> Thanks,
> Martin
> gcc/ChangeLog:
> 2019-08-09  Martin Liska  <>
> 	PR ipa/91404
> 	* passes.c (order): Remove.
> 	(uid_hash_t): Likewise).
> 	(remove_cgraph_node_from_order): Remove from set
> 	of pointers (cgraph_node *).
> 	(insert_cgraph_node_to_order): New.
> 	(duplicate_cgraph_node_to_order): New.
> 	(do_per_function_toporder): Register all 3 cgraph hooks.
> 	Skip removed_nodes now as we know about all of them.
So this turns out to fix the kernel build failure my tester was tripping
over as well.

OK for the trunk.


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