On Tue, 4 Feb 2014, Jakub Jelinek wrote:
> Hi!
>
> As described in the PR, while build_function_decl_skip_args
> takes care of changing the type from METHOD_TYPE to FUNCTION_TYPE
> if removing first argument (this), the FE may have other special arguments
> that it is aware of (such as in-charge etc.) and if the this argument
> is not removed, but the other arguments are, then the FE can crash
> upon seeing such methods.
>
> Fixed by clearing DECL_LANG_SPECIFIC if we remove any arguments.
>
> Bootstrapped/regtested on x86_64-linux and i686-linux, ok for trunk?
Ok, but shouldn't we do that in the copy_node case as well? Two
places look like
/* Make a new FUNCTION_DECL tree node */
if (!args_to_skip)
new_decl = copy_node (old_decl);
else
new_decl = build_function_decl_skip_args (old_decl, args_to_skip,
false);
it's no longer a FE created function after all?
Richard.
> 2014-02-04 Jakub Jelinek <ja...@redhat.com>
>
> PR tree-optimization/60002
> * cgraphclones.c (build_function_decl_skip_args): Clear
> DECL_LANG_SPECIFIC.
>
> * g++.dg/opt/pr60002.C: New test.
>
> --- gcc/cgraphclones.c.jj 2014-01-31 22:21:42.911750272 +0100
> +++ gcc/cgraphclones.c 2014-02-03 19:43:30.678941701 +0100
> @@ -390,6 +390,9 @@ build_function_decl_skip_args (tree orig
> DECL_BUILT_IN_CLASS (new_decl) = NOT_BUILT_IN;
> DECL_FUNCTION_CODE (new_decl) = (enum built_in_function) 0;
> }
> + /* The FE might have information and assumptions about the other
> + arguments. */
> + DECL_LANG_SPECIFIC (new_decl) = NULL;
> return new_decl;
> }
>
> --- gcc/testsuite/g++.dg/opt/pr60002.C.jj 2014-02-03 19:43:47.671856267
> +0100
> +++ gcc/testsuite/g++.dg/opt/pr60002.C 2014-02-03 19:43:00.000000000
> +0100
> @@ -0,0 +1,12 @@
> +// PR tree-optimization/60002
> +// { dg-do compile }
> +// { dg-options "-O2 -fcompare-debug -fdeclone-ctor-dtor -fipa-cp-clone" }
> +
> +struct A {};
> +
> +struct B : virtual A { B (); ~B (); };
> +
> +B::~B ()
> +{
> + B ();
> +}
>
> Jakub
>
>
--
Richard Biener <rguent...@suse.de>
SUSE / SUSE Labs
SUSE LINUX Products GmbH - Nuernberg - AG Nuernberg - HRB 16746
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