[Bug middle-end/30017] [4.3 Regression] ICE in cp_expr_size, at cp/cp-objcp-common.c:101

["hubicka at ucw dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #11 from hubicka at ucw dot cz  2006-11-30 14:06 -------
Subject: Re:  [4.3 Regression] ICE in cp_expr_size, at cp/cp-objcp-common.c:101

> 
> 
> ------- Comment #10 from hubicka at ucw dot cz  2006-11-30 14:04 -------
> Subject: Re:  [4.3 Regression] ICE in cp_expr_size, at cp/cp-objcp-common.c:101
> 
> Hi,
> the problem is conversion of:
>             __builtin_memcpy(this,&f,sizeof(FIND_RESULT));
> to assignment.  It triggers sanity check in cp-objcp-common.c that
> things of this nature are not initialized directly by backend.  I am not
> quite sure if such a check is neccesarily needed and I think in such an
> side cases it is correct to silently accept the code (it has undefined
> behaviour anyway, right?) as proposed in the patch.
> 
> Alternatively we can come up with some alternate way. What however
yes, there is alternate way ;) WHat I intended to say here is that we
can strenghten the tests in builtins.c to disable the conversion, but
the tests tested in the hook are C++ specific, so I am not sure if there
is some interface.

Honza


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30017