https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98130
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #4)
> That would mean:
>
> --- gcc/testsuite/g++.dg/opt/pr98130.C.jj 2020-12-04 12:30:11.510988404
> +0100
> +++ gcc/testsuite/g++.dg/opt/pr98130.C 2020-12-04 12:33:05.663028984
> +0100
> @@ -0,0 +1,25 @@
> +// PR c++/98130
> +// { dg-do run { target c++11 } }
> +// { dg-options "-O2" }
> +
> +#include <new>
> +
> +typedef int *T;
> +
> +static unsigned char storage[sizeof (T)] alignas (T);
> +static T *p = (T *) storage;
> +
> +static inline __attribute__((__always_inline__)) void
> +foo (T value)
> +{
> + new (p) T(value);
> +}
> +
> +int
> +main ()
> +{
> + int a;
> + foo (&a);
> + if (!*p)
> + __builtin_abort ();
> +}
> --- gcc/gimple.c.jj 2020-11-26 01:14:47.528081989 +0100
> +++ gcc/gimple.c 2020-12-04 12:34:44.865911907 +0100
> @@ -1514,11 +1514,12 @@ gimple_call_fnspec (const gcall *stmt)
> such operator, then we can treat it as free. */
> if (fndecl
> && DECL_IS_OPERATOR_DELETE_P (fndecl)
> + && DECL_IS_REPLACEABLE_OPERATOR (fndecl)
> && gimple_call_from_new_or_delete (stmt))
> return ".co ";
> /* Similarly operator new can be treated as malloc. */
> if (fndecl
> - && DECL_IS_OPERATOR_NEW_P (fndecl)
> + && DECL_IS_REPLACEABLE_OPERATOR_NEW_P (fndecl)
> && gimple_call_from_new_or_delete (stmt))
> return "mC";
> return "";
>
> but the testcase is miscompiled even with that change, and we don't really
> return ".co " nor "mC" on the testcase.
The fix works for me? Note I think we don't need the extra check on
the delete case.
