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authorRichard Sandiford <richard.sandiford@linaro.org>2017-11-01 11:49:34 +0000
committerRichard Sandiford <rsandifo@gcc.gnu.org>2017-11-01 11:49:34 +0000
commitef1d3b57d2d00795c6eb01fe6b8ef6f413163c67 (patch)
treeaf7a96746cc35a998026456f2e51bdbaea611a6a /gcc/config/avr
parentef339d6e2e846ba7ff544def1d79f10762da223d (diff)
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/config/avr')
-rw-r--r--gcc/config/avr/avr-protos.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/avr/avr-protos.h b/gcc/config/avr/avr-protos.h
index 9ed94800797..089e2099874 100644
--- a/gcc/config/avr/avr-protos.h
+++ b/gcc/config/avr/avr-protos.h
@@ -131,7 +131,7 @@ extern bool avr_casei_sequence_check_operands (rtx *xop);
static inline unsigned
regmask (machine_mode mode, unsigned regno)
{
- return ((1u << GET_MODE_SIZE (mode)) - 1) << regno;
+ return ((1u << GET_MODE_SIZE (as_a <fixed_size_mode> (mode))) - 1) << regno;
}
extern void avr_fix_inputs (rtx*, unsigned, unsigned);