Jeff Law <l...@redhat.com> writes:
> On 08/28/2017 01:05 PM, Richard Sandiford wrote:
>>
>>> As for the name, get_nonvoid? Ugh. Not sure. Open to suggestions.
>>
>> I'd rather avoid "nonvoid", since the use of VOIDmode for "no mode" is
>> really an implementation detail in things like opt_mode <scalar_int_mode>.
>> Other possiblities might be:
> Yea, good point on encoding the implementation detail not being a good idea.
>
>>
>> - require
>> - demand
>> - mode
>> - get_mode
>> - require_mode
>> - demand_mode
>> - else_fail (to go with else_void and else_blk)
>> - noelse
> require, demand with or without the _mode suffix seem good to me.
OK, here's a patch that uses require (). I've updated the following
patches in the obvious way.
This does make me want to reconsider another decision though.
Using opt_mode for iterators leads to things like:
opt_scalar_int_mode wider_mode_iter;
FOR_EACH_WIDER_MODE (wider_mode_iter, mode)
{
scalar_int_mode wider_mode = wider_mode_iter.require ();
if (optab_handler (unoptab, wider_mode) != CODE_FOR_nothing)
...
which isn't pretty. It would be easy to support:
scalar_int_mode wider_mode;
FOR_EACH_WIDER_MODE (wider_mode, mode)
if (optab_handler (unoptab, wider_mode) != CODE_FOR_nothing)
...
*but* this would mean that "wider_mode" is accessible but undefined
after the loop (unlike the first loop, where wider_mode_iter is
guaranteed to be empty if the loop runs to completion). Is that OK?
Or is it too suprising?
Another alternative would be:
opt_scalar_int_mode wider_mode_iter;
scalar_int_mode wider_mode;
FOR_EACH_WIDER_MODE (wider_mode_iter, wider_mode, mode)
if (optab_handler (unoptab, wider_mode) != CODE_FOR_nothing)
...
which gives both. But perhaps this would be odd for plain machine_mode
iterators, where there's no obvious distinction between the first and
second arguments.
Thanks,
Richard
2017-08-29 Richard Sandiford <richard.sandif...@linaro.org>
Alan Hayward <alan.hayw...@arm.com>
David Sherwood <david.sherw...@arm.com>
gcc/
* coretypes.h (opt_mode): New class.
* machmode.h (opt_mode): Likewise.
(opt_mode::else_void): New function.
(opt_mode::require): Likewise.
(opt_mode::exists): Likewise.
(GET_MODE_WIDER_MODE): Turn into a function and return an opt_mode.
(GET_MODE_2XWIDER_MODE): Likewise.
(mode_iterator::get_wider): Update accordingly.
(mode_iterator::get_2xwider): Likewise.
(mode_iterator::get_known_wider): Likewise, turning into a template.
* combine.c (make_extraction): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
* config/cr16/cr16.h (LONG_REG_P): Likewise.
* rtlanal.c (init_num_sign_bit_copies_in_rep): Likewise.
* config/c6x/c6x.c (c6x_rtx_costs): Update use of
GET_MODE_2XWIDER_MODE, forcing a wider mode to exist.
* lower-subreg.c (init_lower_subreg): Likewise.
* optabs-libfuncs.c (init_sync_libfuncs_1): Likewise, but not
on the final iteration.
* config/i386/i386.c (ix86_expand_set_or_movmem): Check whether
a wider mode exists before asking for a move pattern.
(get_mode_wider_vector): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
(expand_vselect_vconcat): Update use of GET_MODE_2XWIDER_MODE,
returning false if no such mode exists.
* config/ia64/ia64.c (expand_vselect_vconcat): Likewise.
* config/mips/mips.c (mips_expand_vselect_vconcat): Likewise.
* expmed.c (init_expmed_one_mode): Update use of GET_MODE_WIDER_MODE.
Avoid checking for a MODE_INT if we already know the mode is not a
SCALAR_INT_MODE_P.
(extract_high_half): Update use of GET_MODE_WIDER_MODE,
forcing a wider mode to exist.
(expmed_mult_highpart_optab): Likewise.
(expmed_mult_highpart): Likewise.
* expr.c (expand_expr_real_2): Update use of GET_MODE_WIDER_MODE,
using else_void.
* lto-streamer-in.c (lto_input_mode_table): Likewise.
* optabs-query.c (find_widening_optab_handler_and_mode): Likewise.
* stor-layout.c (bit_field_mode_iterator::next_mode): Likewise.
* internal-fn.c (expand_mul_overflow): Update use of
GET_MODE_2XWIDER_MODE.
* omp-low.c (omp_clause_aligned_alignment): Likewise.
* tree-ssa-math-opts.c (convert_mult_to_widen): Update use of
GET_MODE_WIDER_MODE.
(convert_plusminus_to_widen): Likewise.
* tree-switch-conversion.c (array_value_type): Likewise.
* var-tracking.c (emit_note_insn_var_location): Likewise.
* tree-vrp.c (simplify_float_conversion_using_ranges): Likewise.
Return false inside rather than outside the loop if no wider mode
exists
* optabs.c (expand_binop): Update use of GET_MODE_WIDER_MODE
and GET_MODE_2XWIDER_MODE
(can_compare_p): Use else_void.
* gdbhooks.py (OptMachineModePrinter): New class.
(build_pretty_printer): Use it for opt_mode.
gcc/ada/
* gcc-interface/decl.c (validate_size): Update use of
GET_MODE_WIDER_MODE, forcing a wider mode to exist.
Index: gcc/coretypes.h
===================================================================
--- gcc/coretypes.h 2017-08-29 15:51:59.126986401 +0100
+++ gcc/coretypes.h 2017-08-29 15:52:16.793375425 +0100
@@ -55,6 +55,7 @@ typedef const struct simple_bitmap_def *
struct rtx_def;
typedef struct rtx_def *rtx;
typedef const struct rtx_def *const_rtx;
+template<typename> class opt_mode;
/* Subclasses of rtx_def, using indentation to show the class
hierarchy, along with the relevant invariant.
Index: gcc/machmode.h
===================================================================
--- gcc/machmode.h 2017-08-29 15:51:59.315986390 +0100
+++ gcc/machmode.h 2017-08-29 15:52:16.797005080 +0100
@@ -221,6 +221,71 @@ #define CLASS_HAS_WIDER_MODES_P(CLASS)
#define POINTER_BOUNDS_MODE_P(MODE) \
(GET_MODE_CLASS (MODE) == MODE_POINTER_BOUNDS)
+/* An optional T (i.e. a T or nothing), where T is some form of mode class. */
+template<typename T>
+class opt_mode
+{
+public:
+ enum from_int { dummy = MAX_MACHINE_MODE };
+
+ ALWAYS_INLINE opt_mode () : m_mode (E_VOIDmode) {}
+ ALWAYS_INLINE opt_mode (const T &m) : m_mode (m) {}
+ ALWAYS_INLINE opt_mode (from_int m) : m_mode (machine_mode (m)) {}
+
+ machine_mode else_void () const;
+ T require () const;
+
+ bool exists () const;
+ template<typename U> bool exists (U *) const;
+
+private:
+ machine_mode m_mode;
+};
+
+/* If the object contains a T, return its enum value, otherwise return
+ E_VOIDmode. */
+
+template<typename T>
+ALWAYS_INLINE machine_mode
+opt_mode<T>::else_void () const
+{
+ return m_mode;
+}
+
+/* Assert that the object contains a T and return it. */
+
+template<typename T>
+inline T
+opt_mode<T>::require () const
+{
+ gcc_checking_assert (m_mode != E_VOIDmode);
+ return typename mode_traits<T>::from_int (m_mode);
+}
+
+/* Return true if the object contains a T rather than nothing. */
+
+template<typename T>
+ALWAYS_INLINE bool
+opt_mode<T>::exists () const
+{
+ return m_mode != E_VOIDmode;
+}
+
+/* Return true if the object contains a T, storing it in *MODE if so. */
+
+template<typename T>
+template<typename U>
+inline bool
+opt_mode<T>::exists (U *mode) const
+{
+ if (m_mode != E_VOIDmode)
+ {
+ *mode = T (typename mode_traits<T>::from_int (m_mode));
+ return true;
+ }
+ return false;
+}
+
/* Return the base GET_MODE_SIZE value for MODE. */
ALWAYS_INLINE unsigned short
@@ -352,13 +417,22 @@ #define GET_MODE_NUNITS(MODE) (mode_to_n
/* Get the next wider natural mode (eg, QI -> HI -> SI -> DI -> TI). */
-extern const unsigned char mode_wider[NUM_MACHINE_MODES];
-#define GET_MODE_WIDER_MODE(MODE) ((machine_mode) mode_wider[MODE])
+template<typename T>
+ALWAYS_INLINE opt_mode<T>
+GET_MODE_WIDER_MODE (const T &m)
+{
+ return typename opt_mode<T>::from_int (mode_wider[m]);
+}
/* For scalars, this is a mode with twice the precision. For vectors,
this is a mode with the same inner mode but with twice the elements. */
-extern const unsigned char mode_2xwider[NUM_MACHINE_MODES];
-#define GET_MODE_2XWIDER_MODE(MODE) ((machine_mode) mode_2xwider[MODE])
+
+template<typename T>
+ALWAYS_INLINE opt_mode<T>
+GET_MODE_2XWIDER_MODE (const T &m)
+{
+ return typename opt_mode<T>::from_int (mode_2xwider[m]);
+}
/* Get the complex mode from the component mode. */
extern const unsigned char mode_complex[NUM_MACHINE_MODES];
@@ -497,17 +571,17 @@ struct int_n_data_t {
inline void
get_wider (machine_mode *iter)
{
- *iter = GET_MODE_WIDER_MODE (*iter);
+ *iter = GET_MODE_WIDER_MODE (*iter).else_void ();
}
/* Set mode iterator *ITER to the next widest mode in the same class.
Such a mode is known to exist. */
+ template<typename T>
inline void
- get_known_wider (machine_mode *iter)
+ get_known_wider (T *iter)
{
- *iter = GET_MODE_WIDER_MODE (*iter);
- gcc_checking_assert (*iter != VOIDmode);
+ *iter = GET_MODE_WIDER_MODE (*iter).require ();
}
/* Set mode iterator *ITER to the mode that is two times wider than the
@@ -516,7 +590,7 @@ struct int_n_data_t {
inline void
get_2xwider (machine_mode *iter)
{
- *iter = GET_MODE_2XWIDER_MODE (*iter);
+ *iter = GET_MODE_2XWIDER_MODE (*iter).else_void ();
}
}
Index: gcc/combine.c
===================================================================
--- gcc/combine.c 2017-08-29 15:51:59.308986390 +0100
+++ gcc/combine.c 2017-08-29 15:52:16.787023529 +0100
@@ -7596,10 +7596,7 @@ make_extraction (machine_mode mode, rtx
wanted_inner_mode = smallest_mode_for_size (len, MODE_INT);
while (pos % GET_MODE_BITSIZE (wanted_inner_mode) + len
> GET_MODE_BITSIZE (wanted_inner_mode))
- {
- wanted_inner_mode = GET_MODE_WIDER_MODE (wanted_inner_mode);
- gcc_assert (wanted_inner_mode != VOIDmode);
- }
+ wanted_inner_mode = GET_MODE_WIDER_MODE (wanted_inner_mode).require ();
}
orig_pos = pos;
Index: gcc/config/cr16/cr16.h
===================================================================
--- gcc/config/cr16/cr16.h 2017-08-29 15:51:59.055986405 +0100
+++ gcc/config/cr16/cr16.h 2017-08-29 15:52:16.787023529 +0100
@@ -197,9 +197,7 @@ #define CALL_USED_REGISTERS
/* Returns 1 if the register is longer than word size, 0 otherwise. */
#define LONG_REG_P(REGNO) \
- (HARD_REGNO_NREGS (REGNO, \
- GET_MODE_WIDER_MODE (smallest_mode_for_size \
- (BITS_PER_WORD, MODE_INT))) == 1)
+ (HARD_REGNO_NREGS (REGNO, GET_MODE_WIDER_MODE (word_mode).require ()) == 1)
#define HARD_REGNO_NREGS(REGNO, MODE) \
((REGNO >= CR16_FIRST_DWORD_REGISTER) \
Index: gcc/rtlanal.c
===================================================================
--- gcc/rtlanal.c 2017-08-29 15:51:59.318986390 +0100
+++ gcc/rtlanal.c 2017-08-29 15:52:16.798819908 +0100
@@ -5680,13 +5680,15 @@ init_num_sign_bit_copies_in_rep (void)
/* Currently, it is assumed that TARGET_MODE_REP_EXTENDED
extends to the next widest mode. */
gcc_assert (targetm.mode_rep_extended (mode, in_mode) == UNKNOWN
- || GET_MODE_WIDER_MODE (mode) == in_mode);
+ || GET_MODE_WIDER_MODE (mode).require () == in_mode);
/* We are in in_mode. Count how many bits outside of mode
have to be copies of the sign-bit. */
FOR_EACH_MODE (i, mode, in_mode)
{
- machine_mode wider = GET_MODE_WIDER_MODE (i);
+ /* This must always exist (for the last iteration it will be
+ IN_MODE). */
+ machine_mode wider = GET_MODE_WIDER_MODE (i).require ();
if (targetm.mode_rep_extended (i, wider) == SIGN_EXTEND
/* We can only check sign-bit copies starting from the
Index: gcc/config/c6x/c6x.c
===================================================================
--- gcc/config/c6x/c6x.c 2017-08-29 15:51:59.252986394 +0100
+++ gcc/config/c6x/c6x.c 2017-08-29 15:52:16.787023529 +0100
@@ -6066,7 +6066,7 @@ c6x_rtx_costs (rtx x, machine_mode mode,
/* Recognize a mult_highpart operation. */
if ((mode == HImode || mode == SImode)
&& GET_CODE (XEXP (x, 0)) == LSHIFTRT
- && GET_MODE (XEXP (x, 0)) == GET_MODE_2XWIDER_MODE (mode)
+ && GET_MODE (XEXP (x, 0)) == GET_MODE_2XWIDER_MODE (mode).require ()
&& GET_CODE (XEXP (XEXP (x, 0), 0)) == MULT
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
&& INTVAL (XEXP (XEXP (x, 0), 1)) == GET_MODE_BITSIZE (mode))
Index: gcc/lower-subreg.c
===================================================================
--- gcc/lower-subreg.c 2017-08-29 15:51:59.094986403 +0100
+++ gcc/lower-subreg.c 2017-08-29 15:52:16.796097666 +0100
@@ -267,7 +267,7 @@ init_lower_subreg (void)
memset (this_target_lower_subreg, 0, sizeof (*this_target_lower_subreg));
- twice_word_mode = GET_MODE_2XWIDER_MODE (word_mode);
+ twice_word_mode = GET_MODE_2XWIDER_MODE (word_mode).require ();
rtxes.target = gen_rtx_REG (word_mode, LAST_VIRTUAL_REGISTER + 1);
rtxes.source = gen_rtx_REG (word_mode, LAST_VIRTUAL_REGISTER + 2);
Index: gcc/optabs-libfuncs.c
===================================================================
--- gcc/optabs-libfuncs.c 2017-07-13 09:25:13.387236070 +0100
+++ gcc/optabs-libfuncs.c 2017-08-29 15:52:16.797912494 +0100
@@ -918,9 +918,10 @@ init_sync_libfuncs_1 (optab tab, const c
mode = QImode;
for (i = 1; i <= max; i *= 2)
{
+ if (i > 1)
+ mode = GET_MODE_2XWIDER_MODE (mode).require ();
buf[len + 1] = '0' + i;
set_optab_libfunc (tab, mode, buf);
- mode = GET_MODE_2XWIDER_MODE (mode);
}
}
Index: gcc/config/i386/i386.c
===================================================================
--- gcc/config/i386/i386.c 2017-08-29 15:51:59.312986390 +0100
+++ gcc/config/i386/i386.c 2017-08-29 15:52:16.790653184 +0100
@@ -28543,6 +28543,7 @@ ix86_expand_set_or_movmem (rtx dst, rtx
bool need_zero_guard = false;
bool noalign;
machine_mode move_mode = VOIDmode;
+ machine_mode wider_mode;
int unroll_factor = 1;
/* TODO: Once value ranges are available, fill in proper data. */
unsigned HOST_WIDE_INT min_size = 0;
@@ -28636,9 +28637,9 @@ ix86_expand_set_or_movmem (rtx dst, rtx
unroll_factor = 4;
/* Find the widest supported mode. */
move_mode = word_mode;
- while (optab_handler (mov_optab, GET_MODE_WIDER_MODE (move_mode))
- != CODE_FOR_nothing)
- move_mode = GET_MODE_WIDER_MODE (move_mode);
+ while (GET_MODE_WIDER_MODE (move_mode).exists (&wider_mode)
+ && optab_handler (mov_optab, wider_mode) != CODE_FOR_nothing)
+ move_mode = wider_mode;
/* Find the corresponding vector mode with the same size as MOVE_MODE.
MOVE_MODE is an integer mode at the moment (SI, DI, TI, etc.). */
@@ -43523,7 +43524,7 @@ static bool expand_vec_perm_palignr (str
get_mode_wider_vector (machine_mode o)
{
/* ??? Rely on the ordering that genmodes.c gives to vectors. */
- machine_mode n = GET_MODE_WIDER_MODE (o);
+ machine_mode n = GET_MODE_WIDER_MODE (o).require ();
gcc_assert (GET_MODE_NUNITS (o) == GET_MODE_NUNITS (n) * 2);
gcc_assert (GET_MODE_SIZE (o) == GET_MODE_SIZE (n));
return n;
@@ -46886,7 +46887,8 @@ expand_vselect_vconcat (rtx target, rtx
if (vselect_insn == NULL_RTX)
init_vselect_insn ();
- v2mode = GET_MODE_2XWIDER_MODE (GET_MODE (op0));
+ if (!GET_MODE_2XWIDER_MODE (GET_MODE (op0)).exists (&v2mode))
+ return false;
x = XEXP (SET_SRC (PATTERN (vselect_insn)), 0);
PUT_MODE (x, v2mode);
XEXP (x, 0) = op0;
Index: gcc/config/ia64/ia64.c
===================================================================
--- gcc/config/ia64/ia64.c 2017-08-29 15:51:59.261986393 +0100
+++ gcc/config/ia64/ia64.c 2017-08-29 15:52:16.791560598 +0100
@@ -11353,7 +11353,8 @@ expand_vselect_vconcat (rtx target, rtx
machine_mode v2mode;
rtx x;
- v2mode = GET_MODE_2XWIDER_MODE (GET_MODE (op0));
+ if (!GET_MODE_2XWIDER_MODE (GET_MODE (op0)).exists (&v2mode))
+ return false;
x = gen_rtx_VEC_CONCAT (v2mode, op0, op1);
return expand_vselect (target, x, perm, nelt);
}
Index: gcc/config/mips/mips.c
===================================================================
--- gcc/config/mips/mips.c 2017-08-29 15:51:59.265986393 +0100
+++ gcc/config/mips/mips.c 2017-08-29 15:52:16.793375425 +0100
@@ -21134,7 +21134,8 @@ mips_expand_vselect_vconcat (rtx target,
machine_mode v2mode;
rtx x;
- v2mode = GET_MODE_2XWIDER_MODE (GET_MODE (op0));
+ if (!GET_MODE_2XWIDER_MODE (GET_MODE (op0)).exists (&v2mode))
+ return false;
x = gen_rtx_VEC_CONCAT (v2mode, op0, op1);
return mips_expand_vselect (target, x, perm, nelt);
}
Index: gcc/expmed.c
===================================================================
--- gcc/expmed.c 2017-08-29 15:52:16.456724920 +0100
+++ gcc/expmed.c 2017-08-29 15:52:16.793375425 +0100
@@ -207,11 +207,10 @@ init_expmed_one_mode (struct init_expmed
for (mode_from = MIN_MODE_INT; mode_from <= MAX_MODE_INT;
mode_from = (machine_mode)(mode_from + 1))
init_expmed_one_conv (all, mode, mode_from, speed);
- }
- if (GET_MODE_CLASS (mode) == MODE_INT)
- {
- machine_mode wider_mode = GET_MODE_WIDER_MODE (mode);
- if (wider_mode != VOIDmode)
+
+ machine_mode wider_mode;
+ if (GET_MODE_CLASS (mode) == MODE_INT
+ && GET_MODE_WIDER_MODE (mode).exists (&wider_mode))
{
PUT_MODE (all->zext, wider_mode);
PUT_MODE (all->wide_mult, wider_mode);
@@ -3618,7 +3617,7 @@ extract_high_half (machine_mode mode, rt
gcc_assert (!SCALAR_FLOAT_MODE_P (mode));
- wider_mode = GET_MODE_WIDER_MODE (mode);
+ wider_mode = GET_MODE_WIDER_MODE (mode).require ();
op = expand_shift (RSHIFT_EXPR, wider_mode, op,
GET_MODE_BITSIZE (mode), 0, 1);
return convert_modes (mode, wider_mode, op, 0);
@@ -3640,7 +3639,7 @@ expmed_mult_highpart_optab (machine_mode
gcc_assert (!SCALAR_FLOAT_MODE_P (mode));
- wider_mode = GET_MODE_WIDER_MODE (mode);
+ wider_mode = GET_MODE_WIDER_MODE (mode).require ();
size = GET_MODE_BITSIZE (mode);
/* Firstly, try using a multiplication insn that only generates the needed
@@ -3746,7 +3745,7 @@ expmed_mult_highpart_optab (machine_mode
expmed_mult_highpart (machine_mode mode, rtx op0, rtx op1,
rtx target, int unsignedp, int max_cost)
{
- machine_mode wider_mode = GET_MODE_WIDER_MODE (mode);
+ machine_mode wider_mode = GET_MODE_WIDER_MODE (mode).require ();
unsigned HOST_WIDE_INT cnst1;
int extra_cost;
bool sign_adjust = false;
Index: gcc/expr.c
===================================================================
--- gcc/expr.c 2017-08-29 15:51:59.315986390 +0100
+++ gcc/expr.c 2017-08-29 15:52:16.794282839 +0100
@@ -9142,7 +9142,7 @@ #define REDUCE_BIT_FIELD(expr) (reduce_b
if (code == LSHIFT_EXPR
&& target
&& REG_P (target)
- && mode == GET_MODE_WIDER_MODE (word_mode)
+ && mode == GET_MODE_WIDER_MODE (word_mode).else_void ()
&& GET_MODE_SIZE (mode) == 2 * GET_MODE_SIZE (word_mode)
&& TREE_CONSTANT (treeop1)
&& TREE_CODE (treeop0) == SSA_NAME)
Index: gcc/lto-streamer-in.c
===================================================================
--- gcc/lto-streamer-in.c 2017-08-21 12:14:39.684583630 +0100
+++ gcc/lto-streamer-in.c 2017-08-29 15:52:16.796097666 +0100
@@ -1636,7 +1636,7 @@ lto_input_mode_table (struct lto_file_de
: GET_CLASS_NARROWEST_MODE (mclass);
pass ? mr < MAX_MACHINE_MODE : mr != VOIDmode;
pass ? mr = (machine_mode) (mr + 1)
- : mr = GET_MODE_WIDER_MODE (mr))
+ : mr = GET_MODE_WIDER_MODE (mr).else_void ())
if (GET_MODE_CLASS (mr) != mclass
|| GET_MODE_SIZE (mr) != size
|| GET_MODE_PRECISION (mr) != prec
Index: gcc/optabs-query.c
===================================================================
--- gcc/optabs-query.c 2017-08-29 15:51:59.316986390 +0100
+++ gcc/optabs-query.c 2017-08-29 15:52:16.797912494 +0100
@@ -425,7 +425,7 @@ find_widening_optab_handler_and_mode (op
for (; (permit_non_widening || from_mode != to_mode)
&& GET_MODE_SIZE (from_mode) <= GET_MODE_SIZE (to_mode)
&& from_mode != VOIDmode;
- from_mode = GET_MODE_WIDER_MODE (from_mode))
+ from_mode = GET_MODE_WIDER_MODE (from_mode).else_void ())
{
enum insn_code handler = widening_optab_handler (op, to_mode,
from_mode);
Index: gcc/stor-layout.c
===================================================================
--- gcc/stor-layout.c 2017-08-29 15:51:59.319986390 +0100
+++ gcc/stor-layout.c 2017-08-29 15:52:16.799727321 +0100
@@ -2745,7 +2745,8 @@ fixup_unsigned_type (tree type)
bool
bit_field_mode_iterator::next_mode (machine_mode *out_mode)
{
- for (; m_mode != VOIDmode; m_mode = GET_MODE_WIDER_MODE (m_mode))
+ for (; m_mode != VOIDmode;
+ m_mode = GET_MODE_WIDER_MODE (m_mode).else_void ())
{
unsigned int unit = GET_MODE_BITSIZE (m_mode);
@@ -2782,7 +2783,7 @@ bit_field_mode_iterator::next_mode (mach
break;
*out_mode = m_mode;
- m_mode = GET_MODE_WIDER_MODE (m_mode);
+ m_mode = GET_MODE_WIDER_MODE (m_mode).else_void ();
m_count++;
return true;
}
Index: gcc/internal-fn.c
===================================================================
--- gcc/internal-fn.c 2017-08-17 09:05:42.895968489 +0100
+++ gcc/internal-fn.c 2017-08-29 15:52:16.796097666 +0100
@@ -1460,14 +1460,14 @@ expand_mul_overflow (location_t loc, tre
struct separate_ops ops;
int prec = GET_MODE_PRECISION (mode);
machine_mode hmode = mode_for_size (prec / 2, MODE_INT, 1);
+ machine_mode wmode;
ops.op0 = make_tree (type, op0);
ops.op1 = make_tree (type, op1);
ops.op2 = NULL_TREE;
ops.location = loc;
- if (GET_MODE_2XWIDER_MODE (mode) != VOIDmode
- && targetm.scalar_mode_supported_p (GET_MODE_2XWIDER_MODE (mode)))
+ if (GET_MODE_2XWIDER_MODE (mode).exists (&wmode)
+ && targetm.scalar_mode_supported_p (wmode))
{
- machine_mode wmode = GET_MODE_2XWIDER_MODE (mode);
ops.code = WIDEN_MULT_EXPR;
ops.type
= build_nonstandard_integer_type (GET_MODE_PRECISION (wmode), uns);
Index: gcc/omp-low.c
===================================================================
--- gcc/omp-low.c 2017-08-29 15:51:59.316986390 +0100
+++ gcc/omp-low.c 2017-08-29 15:52:16.797005080 +0100
@@ -3456,8 +3456,8 @@ omp_clause_aligned_alignment (tree claus
continue;
while (vs
&& GET_MODE_SIZE (vmode) < vs
- && GET_MODE_2XWIDER_MODE (vmode) != VOIDmode)
- vmode = GET_MODE_2XWIDER_MODE (vmode);
+ && GET_MODE_2XWIDER_MODE (vmode).exists ())
+ vmode = GET_MODE_2XWIDER_MODE (vmode).require ();
tree type = lang_hooks.types.type_for_mode (mode, 1);
if (type == NULL_TREE || TYPE_MODE (type) != mode)
Index: gcc/tree-ssa-math-opts.c
===================================================================
--- gcc/tree-ssa-math-opts.c 2017-08-29 15:51:59.319986390 +0100
+++ gcc/tree-ssa-math-opts.c 2017-08-29 15:52:16.799727321 +0100
@@ -3283,8 +3283,8 @@ convert_mult_to_widen (gimple *stmt, gim
|| (TYPE_UNSIGNED (type2)
&& TYPE_PRECISION (type2) == GET_MODE_PRECISION (from_mode)))
{
- from_mode = GET_MODE_WIDER_MODE (from_mode);
- if (GET_MODE_SIZE (to_mode) <= GET_MODE_SIZE (from_mode))
+ if (!GET_MODE_WIDER_MODE (from_mode).exists (&from_mode)
+ || GET_MODE_SIZE (to_mode) <= GET_MODE_SIZE (from_mode))
return false;
}
@@ -3465,8 +3465,8 @@ convert_plusminus_to_widen (gimple_stmt_
|| (from_unsigned2
&& TYPE_PRECISION (type2) == GET_MODE_PRECISION (from_mode)))
{
- from_mode = GET_MODE_WIDER_MODE (from_mode);
- if (GET_MODE_SIZE (from_mode) >= GET_MODE_SIZE (to_mode))
+ if (!GET_MODE_WIDER_MODE (from_mode).exists (&from_mode)
+ || GET_MODE_SIZE (from_mode) >= GET_MODE_SIZE (to_mode))
return false;
}
Index: gcc/tree-switch-conversion.c
===================================================================
--- gcc/tree-switch-conversion.c 2017-08-29 15:51:59.329986389 +0100
+++ gcc/tree-switch-conversion.c 2017-08-29 15:52:16.799727321 +0100
@@ -1085,8 +1085,7 @@ array_value_type (gswitch *swtch, tree t
if (sign == 1)
sign = 0;
- mode = GET_MODE_WIDER_MODE (mode);
- if (mode == VOIDmode
+ if (!GET_MODE_WIDER_MODE (mode).exists (&mode)
|| GET_MODE_SIZE (mode) >= GET_MODE_SIZE (type_mode))
return type;
}
Index: gcc/var-tracking.c
===================================================================
--- gcc/var-tracking.c 2017-08-29 15:51:59.321986390 +0100
+++ gcc/var-tracking.c 2017-08-29 15:52:16.801542149 +0100
@@ -8706,12 +8706,11 @@ emit_note_insn_var_location (variable **
last_limit = offsets[n_var_parts] + GET_MODE_SIZE (mode);
/* Attempt to merge adjacent registers or memory. */
- wider_mode = GET_MODE_WIDER_MODE (mode);
for (j = i + 1; j < var->n_var_parts; j++)
if (last_limit <= VAR_PART_OFFSET (var, j))
break;
if (j < var->n_var_parts
- && wider_mode != VOIDmode
+ && GET_MODE_WIDER_MODE (mode).exists (&wider_mode)
&& var->var_part[j].cur_loc
&& mode == GET_MODE (var->var_part[j].cur_loc)
&& (REG_P (loc[n_var_parts]) || MEM_P (loc[n_var_parts]))
Index: gcc/tree-vrp.c
===================================================================
--- gcc/tree-vrp.c 2017-08-21 15:50:48.665709938 +0100
+++ gcc/tree-vrp.c 2017-08-29 15:52:16.800634735 +0100
@@ -10120,7 +10120,7 @@ simplify_float_conversion_using_ranges (
else
{
mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
- do
+ for (;;)
{
/* If we cannot do a signed conversion to float from mode
or if the value-range does not fit in the signed type
@@ -10129,15 +10129,12 @@ simplify_float_conversion_using_ranges (
&& range_fits_type_p (vr, GET_MODE_PRECISION (mode), SIGNED))
break;
- mode = GET_MODE_WIDER_MODE (mode);
/* But do not widen the input. Instead leave that to the
optabs expansion code. */
- if (GET_MODE_PRECISION (mode) > TYPE_PRECISION (TREE_TYPE (rhs1)))
+ if (!GET_MODE_WIDER_MODE (mode).exists (&mode)
+ || GET_MODE_PRECISION (mode) > TYPE_PRECISION (TREE_TYPE (rhs1)))
return false;
}
- while (mode != VOIDmode);
- if (mode == VOIDmode)
- return false;
}
/* It works, insert a truncation or sign-change before the
Index: gcc/optabs.c
===================================================================
--- gcc/optabs.c 2017-08-29 15:51:59.317986390 +0100
+++ gcc/optabs.c 2017-08-29 15:52:16.798819908 +0100
@@ -1186,13 +1186,13 @@ expand_binop (machine_mode mode, optab b
takes operands of this mode and makes a wider mode. */
if (binoptab == smul_optab
- && GET_MODE_2XWIDER_MODE (mode) != VOIDmode
- && (widening_optab_handler ((unsignedp ? umul_widen_optab
- : smul_widen_optab),
- GET_MODE_2XWIDER_MODE (mode), mode)
- != CODE_FOR_nothing))
+ && GET_MODE_2XWIDER_MODE (mode).exists (&wider_mode)
+ && (convert_optab_handler ((unsignedp
+ ? umul_widen_optab
+ : smul_widen_optab),
+ wider_mode, mode) != CODE_FOR_nothing))
{
- temp = expand_binop (GET_MODE_2XWIDER_MODE (mode),
+ temp = expand_binop (wider_mode,
unsignedp ? umul_widen_optab : smul_widen_optab,
op0, op1, NULL_RTX, unsignedp, OPTAB_DIRECT);
@@ -1253,14 +1253,14 @@ expand_binop (machine_mode mode, optab b
&& methods != OPTAB_DIRECT && methods != OPTAB_LIB)
FOR_EACH_WIDER_MODE (wider_mode, mode)
{
+ machine_mode next_mode;
if (optab_handler (binoptab, wider_mode) != CODE_FOR_nothing
|| (binoptab == smul_optab
- && GET_MODE_WIDER_MODE (wider_mode) != VOIDmode
+ && GET_MODE_WIDER_MODE (wider_mode).exists (&next_mode)
&& (find_widening_optab_handler ((unsignedp
? umul_widen_optab
: smul_widen_optab),
- GET_MODE_WIDER_MODE
(wider_mode),
- mode, 0)
+ next_mode, mode, 0)
!= CODE_FOR_nothing)))
{
rtx xop0 = op0, xop1 = op1;
@@ -3702,7 +3702,7 @@ can_compare_p (enum rtx_code code, machi
&& optab_handler (cmov_optab, mode) != CODE_FOR_nothing)
return 1;
- mode = GET_MODE_WIDER_MODE (mode);
+ mode = GET_MODE_WIDER_MODE (mode).else_void ();
PUT_MODE (test, mode);
}
while (mode != VOIDmode);
Index: gcc/gdbhooks.py
===================================================================
--- gcc/gdbhooks.py 2017-07-13 09:25:13.387236070 +0100
+++ gcc/gdbhooks.py 2017-08-29 15:52:16.796097666 +0100
@@ -422,6 +422,18 @@ class VecPrinter:
######################################################################
+class OptMachineModePrinter:
+ def __init__(self, gdbval):
+ self.gdbval = gdbval
+
+ def to_string (self):
+ name = str(self.gdbval['m_mode'])
+ if name == 'E_VOIDmode':
+ return '<None>'
+ return name[2:] if name.startswith('E_') else name
+
+######################################################################
+
# TODO:
# * hashtab
# * location_t
@@ -518,6 +530,9 @@ def build_pretty_printer():
'vec',
VecPrinter)
+ pp.add_printer_for_regex(r'opt_mode<(\S+)>',
+ 'opt_mode', OptMachineModePrinter)
+
return pp
gdb.printing.register_pretty_printer(
Index: gcc/ada/gcc-interface/decl.c
===================================================================
--- gcc/ada/gcc-interface/decl.c 2017-07-13 09:25:13.387236070 +0100
+++ gcc/ada/gcc-interface/decl.c 2017-08-29 15:52:16.784301288 +0100
@@ -8576,7 +8576,7 @@ validate_size (Uint uint_size, tree gnu_
{
machine_mode p_mode = GET_CLASS_NARROWEST_MODE (MODE_INT);
while (!targetm.valid_pointer_mode (p_mode))
- p_mode = GET_MODE_WIDER_MODE (p_mode);
+ p_mode = GET_MODE_WIDER_MODE (p_mode).require ();
type_size = bitsize_int (GET_MODE_BITSIZE (p_mode));
}
