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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2017-11-01 11:49:34 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2017-11-01 11:49:34 +0000 |
| commit | ef1d3b57d2d00795c6eb01fe6b8ef6f413163c67 (patch) | |
| tree | af7a96746cc35a998026456f2e51bdbaea611a6a /gcc/dbxout.c | |
| parent | ef339d6e2e846ba7ff544def1d79f10762da223d (diff) | |
| download | gcc-ef1d3b57d2d00795c6eb01fe6b8ef6f413163c67.zip gcc-ef1d3b57d2d00795c6eb01fe6b8ef6f413163c67.tar.gz gcc-ef1d3b57d2d00795c6eb01fe6b8ef6f413163c67.tar.bz2 | |
Add a fixed_size_mode class
This patch adds a fixed_size_mode machine_mode wrapper
for modes that are known to have a fixed size. That applies
to all current modes, but future patches will add support for
variable-sized modes.
The use of this class should be pretty restricted. One important
use case is to hold the mode of static data, which can never be
variable-sized with current file formats. Another is to hold
the modes of registers involved in __builtin_apply and
__builtin_result, since those interfaces don't cope well with
variable-sized data.
The class can also be useful when reinterpreting the contents of
a fixed-length bit string as a different kind of value.
2017-11-01 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* machmode.h (fixed_size_mode): New class.
* rtl.h (get_pool_mode): Return fixed_size_mode.
* gengtype.c (main): Add fixed_size_mode.
* target.def (get_raw_result_mode): Return a fixed_size_mode.
(get_raw_arg_mode): Likewise.
* doc/tm.texi: Regenerate.
* targhooks.h (default_get_reg_raw_mode): Return a fixed_size_mode.
* targhooks.c (default_get_reg_raw_mode): Likewise.
* config/ia64/ia64.c (ia64_get_reg_raw_mode): Likewise.
* config/mips/mips.c (mips_get_reg_raw_mode): Likewise.
* config/msp430/msp430.c (msp430_get_raw_arg_mode): Likewise.
(msp430_get_raw_result_mode): Likewise.
* config/avr/avr-protos.h (regmask): Use as_a <fixed_side_mode>
* dbxout.c (dbxout_parms): Require fixed-size modes.
* expr.c (copy_blkmode_from_reg, copy_blkmode_to_reg): Likewise.
* gimple-ssa-store-merging.c (encode_tree_to_bitpos): Likewise.
* omp-low.c (lower_oacc_reductions): Likewise.
* simplify-rtx.c (simplify_immed_subreg): Take fixed_size_modes.
(simplify_subreg): Update accordingly.
* varasm.c (constant_descriptor_rtx::mode): Change to fixed_size_mode.
(force_const_mem): Update accordingly. Return NULL_RTX for modes
that aren't fixed-size.
(get_pool_mode): Return a fixed_size_mode.
(output_constant_pool_2): Take a fixed_size_mode.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r254300
Diffstat (limited to 'gcc/dbxout.c')
| -rw-r--r-- | gcc/dbxout.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/dbxout.c b/gcc/dbxout.c index 0615e84..49a8583 100644 --- a/gcc/dbxout.c +++ b/gcc/dbxout.c @@ -3393,12 +3393,16 @@ dbxout_parms (tree parms) { ++debug_nesting; emit_pending_bincls_if_required (); + fixed_size_mode rtl_mode, type_mode; for (; parms; parms = DECL_CHAIN (parms)) if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node && DECL_RTL_SET_P (parms) - && DECL_INCOMING_RTL (parms)) + && DECL_INCOMING_RTL (parms) + /* We can't represent variable-sized types in this format. */ + && is_a <fixed_size_mode> (TYPE_MODE (TREE_TYPE (parms)), &type_mode) + && is_a <fixed_size_mode> (GET_MODE (DECL_RTL (parms)), &rtl_mode)) { tree eff_type; char letter; @@ -3555,10 +3559,9 @@ dbxout_parms (tree parms) /* Make a big endian correction if the mode of the type of the parameter is not the same as the mode of the rtl. */ if (BYTES_BIG_ENDIAN - && TYPE_MODE (TREE_TYPE (parms)) != GET_MODE (DECL_RTL (parms)) - && GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms))) < UNITS_PER_WORD) - number += (GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))) - - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (parms)))); + && type_mode != rtl_mode + && GET_MODE_SIZE (type_mode) < UNITS_PER_WORD) + number += GET_MODE_SIZE (rtl_mode) - GET_MODE_SIZE (type_mode); } else /* ??? We don't know how to represent this argument. */ |