> Mark ifn_va_arg with ECF_NOTHROW
You can defnitly make it ECF_LEAF too. I wonder if we can make it ECF_CONST or
at leat PURE
this would help to keep variadic functions const/pure that may be moderately
interesting
in practice.
Honza
>
> 2015-04-20 Tom de Vries <t...@codesourcery.com>
>
> PR tree-optimization/65802
> * internal-fn.def (VA_ARG): Add ECF_NOTROW to flags.
>
> * g++.dg/pr65802.C: New test.
> ---
> gcc/internal-fn.def | 2 +-
> gcc/testsuite/g++.dg/pr65802.C | 29 +++++++++++++++++++++++++++++
> 2 files changed, 30 insertions(+), 1 deletion(-)
> create mode 100644 gcc/testsuite/g++.dg/pr65802.C
>
> diff --git a/gcc/internal-fn.def b/gcc/internal-fn.def
> index f557c64..7e19313 100644
> --- a/gcc/internal-fn.def
> +++ b/gcc/internal-fn.def
> @@ -62,4 +62,4 @@ DEF_INTERNAL_FN (ADD_OVERFLOW, ECF_CONST | ECF_LEAF |
> ECF_NOTHROW, NULL)
> DEF_INTERNAL_FN (SUB_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
> DEF_INTERNAL_FN (MUL_OVERFLOW, ECF_CONST | ECF_LEAF | ECF_NOTHROW, NULL)
> DEF_INTERNAL_FN (TSAN_FUNC_EXIT, ECF_NOVOPS | ECF_LEAF | ECF_NOTHROW, NULL)
> -DEF_INTERNAL_FN (VA_ARG, 0, NULL)
> +DEF_INTERNAL_FN (VA_ARG, ECF_NOTHROW, NULL)
> diff --git a/gcc/testsuite/g++.dg/pr65802.C b/gcc/testsuite/g++.dg/pr65802.C
> new file mode 100644
> index 0000000..26e5317
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/pr65802.C
> @@ -0,0 +1,29 @@
> +// { dg-do compile }
> +// { dg-options "-O0" }
> +
> +typedef int tf ();
> +
> +struct S
> +{
> + tf m_fn1;
> +} a;
> +
> +void
> +fn1 ()
> +{
> + try
> + {
> + __builtin_va_list c;
> + {
> + int *d = __builtin_va_arg (c, int *);
> + int **e = &d;
> + __asm__("" : "=d"(e));
> + a.m_fn1 ();
> + }
> + a.m_fn1 ();
> + }
> + catch (...)
> + {
> +
> + }
> +}
> --
> 1.9.1
>
