On Mon, Apr 18, 2011 at 10:17 AM, Andreas Krebbel
<kreb...@linux.vnet.ibm.com> wrote:
> Hi,
>
> the attached patch uses the existing promote_function_mode hook. For
> a libcall neither TYPE nor FNTYPE is available so I had to change a
> few related function in order to deal with that.
>
> The patch also fixes the s390 DFP problems.
>
> Bye,
>
> -Andreas-
>
>
> 2011-04-18 Andreas Krebbel <andreas.kreb...@de.ibm.com>
>
> * calls.c (emit_library_call_value_1): Invoke
> promote_function_mode hook on libcall arguments.
> * explow.c (promote_function_mode, promote_mode): Handle TYPE
> argument being NULL.
> * targhooks.c (default_promote_function_mode): Lisewise.
> * config/s390/s390.c (s390_promote_function_mode): Likewise.
> * config/sparc/sparc.c (sparc_promote_function_mode): Likewise.
>
> * doc/tm.texi: Document that TYPE argument might be NULL.
>
>
> Index: gcc/calls.c
> ===================================================================
> *** gcc/calls.c.orig
> --- gcc/calls.c
> *************** emit_library_call_value_1 (int retval, r
> *** 3484,3489 ****
> --- 3484,3490 ----
> {
> rtx val = va_arg (p, rtx);
> enum machine_mode mode = (enum machine_mode) va_arg (p, int);
> + int unsigned_p = 0;
>
> /* We cannot convert the arg value to the mode the library wants here;
> must do it earlier where we know the signedness of the arg. */
> *************** emit_library_call_value_1 (int retval, r
> *** 3531,3539 ****
> val = force_operand (XEXP (slot, 0), NULL_RTX);
> }
>
> ! argvec[count].value = val;
> argvec[count].mode = mode;
> !
> argvec[count].reg = targetm.calls.function_arg (&args_so_far, mode,
> NULL_TREE, true);
>
> --- 3532,3540 ----
> val = force_operand (XEXP (slot, 0), NULL_RTX);
> }
>
> ! mode = promote_function_mode (NULL_TREE, mode, &unsigned_p,
> NULL_TREE, 0);
> argvec[count].mode = mode;
> ! argvec[count].value = convert_modes (mode, GET_MODE (val), val, 0);
> argvec[count].reg = targetm.calls.function_arg (&args_so_far, mode,
> NULL_TREE, true);
>
> Index: gcc/config/s390/s390.c
> ===================================================================
> *** gcc/config/s390/s390.c.orig
> --- gcc/config/s390/s390.c
> *************** s390_promote_function_mode (const_tree t
> *** 8742,8748 ****
> if (INTEGRAL_MODE_P (mode)
> && GET_MODE_SIZE (mode) < UNITS_PER_LONG)
> {
> ! if (POINTER_TYPE_P (type))
> *punsignedp = POINTERS_EXTEND_UNSIGNED;
> return Pmode;
> }
> --- 8742,8748 ----
> if (INTEGRAL_MODE_P (mode)
> && GET_MODE_SIZE (mode) < UNITS_PER_LONG)
> {
> ! if (type != NULL_TREE && POINTER_TYPE_P (type))
> *punsignedp = POINTERS_EXTEND_UNSIGNED;
> return Pmode;
> }
> Index: gcc/explow.c
> ===================================================================
> *** gcc/explow.c.orig
> --- gcc/explow.c
> *************** enum machine_mode
> *** 771,776 ****
> --- 771,787 ----
> promote_function_mode (const_tree type, enum machine_mode mode, int
> *punsignedp,
> const_tree funtype, int for_return)
> {
> + /* Called without a type node for a libcall. */
> + if (type == NULL_TREE)
> + {
> + if (INTEGRAL_MODE_P (mode))
> + return targetm.calls.promote_function_mode (NULL_TREE, mode,
> + punsignedp, funtype,
> + for_return);
> + else
> + return mode;
> + }
> +
> switch (TREE_CODE (type))
> {
> case INTEGER_TYPE: case ENUMERAL_TYPE: case BOOLEAN_TYPE:
> *************** enum machine_mode
> *** 791,796 ****
> --- 802,813 ----
> promote_mode (const_tree type ATTRIBUTE_UNUSED, enum machine_mode mode,
> int *punsignedp ATTRIBUTE_UNUSED)
> {
> + /* For libcalls this is invoked without TYPE from the backends
> + TARGET_PROMOTE_FUNCTION_MODE hooks. Don't do anything in that
> + case. */
> + if (type == NULL_TREE)
> + return mode;
> +
This broke bootstrap
/space/rguenther/src/svn/trunk/gcc/explow.c: In function 'promote_mode':
/space/rguenther/src/svn/trunk/gcc/explow.c:815:3: error: ISO C90
forbids mixed declarations and code [-Werror=edantic]
cc1: all warnings being treated as errors
> /* FIXME: this is the same logic that was there until GCC 4.4, but we
> probably want to test POINTERS_EXTEND_UNSIGNED even if PROMOTE_MODE
> is not defined. The affected targets are M32C, S390, SPARC. */
> Index: gcc/config/sparc/sparc.c
> ===================================================================
> *** gcc/config/sparc/sparc.c.orig
> --- gcc/config/sparc/sparc.c
> *************** init_cumulative_args (struct sparc_args
> *** 4965,4977 ****
> /* Handle promotion of pointer and integer arguments. */
>
> static enum machine_mode
> ! sparc_promote_function_mode (const_tree type ATTRIBUTE_UNUSED,
> enum machine_mode mode,
> ! int *punsignedp ATTRIBUTE_UNUSED,
> const_tree fntype ATTRIBUTE_UNUSED,
> int for_return ATTRIBUTE_UNUSED)
> {
> ! if (POINTER_TYPE_P (type))
> {
> *punsignedp = POINTERS_EXTEND_UNSIGNED;
> return Pmode;
> --- 4965,4977 ----
> /* Handle promotion of pointer and integer arguments. */
>
> static enum machine_mode
> ! sparc_promote_function_mode (const_tree type,
> enum machine_mode mode,
> ! int *punsignedp,
> const_tree fntype ATTRIBUTE_UNUSED,
> int for_return ATTRIBUTE_UNUSED)
> {
> ! if (type != NULL_TREE && POINTER_TYPE_P (type))
> {
> *punsignedp = POINTERS_EXTEND_UNSIGNED;
> return Pmode;
> Index: gcc/doc/tm.texi.in
> ===================================================================
> *** gcc/doc/tm.texi.in.orig
> --- gcc/doc/tm.texi.in
> *************** which an incoming parameter is copied, o
> *** 952,957 ****
> --- 952,959 ----
> then the hook should return the same mode as @code{promote_mode}, though
> the signedness may be different.
>
> + @var{type} can be omitted when promoting function arguments of libcalls.
> +
> The default is to not promote arguments and return values. You can
> also define the hook to @code{default_promote_function_mode_always_promote}
> if you would like to apply the same rules given by @code{PROMOTE_MODE}.
> Index: gcc/doc/tm.texi
> ===================================================================
> *** gcc/doc/tm.texi.orig
> --- gcc/doc/tm.texi
> *************** which an incoming parameter is copied, o
> *** 962,967 ****
> --- 962,969 ----
> then the hook should return the same mode as @code{promote_mode}, though
> the signedness may be different.
>
> + @var{type} can be omitted when promoting function arguments of libcalls.
> +
> The default is to not promote arguments and return values. You can
> also define the hook to @code{default_promote_function_mode_always_promote}
> if you would like to apply the same rules given by @code{PROMOTE_MODE}.
> Index: gcc/targhooks.c
> ===================================================================
> *** gcc/targhooks.c.orig
> --- gcc/targhooks.c
> *************** default_promote_function_mode (const_tre
> *** 124,130 ****
> const_tree funtype ATTRIBUTE_UNUSED,
> int for_return ATTRIBUTE_UNUSED)
> {
> ! if (for_return == 2)
> return promote_mode (type, mode, punsignedp);
> return mode;
> }
> --- 124,130 ----
> const_tree funtype ATTRIBUTE_UNUSED,
> int for_return ATTRIBUTE_UNUSED)
> {
> ! if (type != NULL_TREE && for_return == 2)
> return promote_mode (type, mode, punsignedp);
> return mode;
> }
>
