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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-08-30 11:14:49 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-08-30 11:14:49 +0000 |
| commit | ae9270466ed530df375bcaf6b3d834dbef6e3965 (patch) | |
| tree | ab6119ee9f8a12e6d5463797916b7995fad7bf4a /gcc/machmode.h | |
| parent | 0ef40942d026e60b28d384b0fb2ff203bf1beca1 (diff) | |
| download | gcc-ae9270466ed530df375bcaf6b3d834dbef6e3965.zip gcc-ae9270466ed530df375bcaf6b3d834dbef6e3965.tar.gz gcc-ae9270466ed530df375bcaf6b3d834dbef6e3965.tar.bz2 | |
[39/77] Two changes to the get_best_mode interface
get_best_mode always returns a scalar_int_mode on success,
so this patch makes that explicit in the type system. Also,
the "largest_mode" argument is used simply to provide a maximum
size, and in practice that size is always a compile-time constant,
even when the concept of variable-sized modes is added later.
The patch therefore passes the size directly.
2017-08-30 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* machmode.h (bit_field_mode_iterator::next_mode): Take a pointer
to a scalar_int_mode instead of a machine_mode.
(bit_field_mode_iterator::m_mode): Change type to opt_scalar_int_mode.
(get_best_mode): Return a boolean and use a pointer argument to store
the selected mode. Replace the limit mode parameter with a bit limit.
* expmed.c (adjust_bit_field_mem_for_reg): Use scalar_int_mode
for the values returned by bit_field_mode_iterator::next_mode.
(store_bit_field): Update call to get_best_mode.
(store_fixed_bit_field): Likewise.
(extract_fixed_bit_field): Likewise.
* expr.c (optimize_bitfield_assignment_op): Likewise.
* fold-const.c (optimize_bit_field_compare): Likewise.
(fold_truth_andor_1): Likewise.
* stor-layout.c (bit_field_mode_iterator::next_mode): As above.
Update for new type of m_mode.
(get_best_mode): As above.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r251491
Diffstat (limited to 'gcc/machmode.h')
| -rw-r--r-- | gcc/machmode.h | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/gcc/machmode.h b/gcc/machmode.h index a9fc93a..5f3e031 100644 --- a/gcc/machmode.h +++ b/gcc/machmode.h @@ -617,11 +617,11 @@ public: bit_field_mode_iterator (HOST_WIDE_INT, HOST_WIDE_INT, HOST_WIDE_INT, HOST_WIDE_INT, unsigned int, bool); - bool next_mode (machine_mode *); + bool next_mode (scalar_int_mode *); bool prefer_smaller_modes (); private: - machine_mode m_mode; + opt_scalar_int_mode m_mode; /* We use signed values here because the bit position can be negative for invalid input such as gcc.dg/pr48335-8.c. */ HOST_WIDE_INT m_bitsize; @@ -635,11 +635,9 @@ private: /* Find the best mode to use to access a bit field. */ -extern machine_mode get_best_mode (int, int, - unsigned HOST_WIDE_INT, - unsigned HOST_WIDE_INT, - unsigned int, - machine_mode, bool); +extern bool get_best_mode (int, int, unsigned HOST_WIDE_INT, + unsigned HOST_WIDE_INT, unsigned int, + unsigned HOST_WIDE_INT, bool, scalar_int_mode *); /* Determine alignment, 1<=result<=BIGGEST_ALIGNMENT. */ |