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author | Jason Merrill <jason@redhat.com> | 2016-09-16 15:20:44 -0400 |
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committer | Jason Merrill <jason@gcc.gnu.org> | 2016-09-16 15:20:44 -0400 |
commit | 146ec50fd5c73a6712d739697cd33567b42c2d3f (patch) | |
tree | 0e81e898dacea27b3882ec8c6cf7ae31690b19d5 /gcc/hwint.h | |
parent | 299910482fcd0627fe1162c1fedbcd09b5630ffe (diff) | |
download | gcc-146ec50fd5c73a6712d739697cd33567b42c2d3f.zip gcc-146ec50fd5c73a6712d739697cd33567b42c2d3f.tar.gz gcc-146ec50fd5c73a6712d739697cd33567b42c2d3f.tar.bz2 |
Add inline functions for various bitwise operations.
* hwint.h (least_bit_hwi, pow2_or_zerop, pow2p_hwi, ctz_or_zero):
New.
* hwint.c (exact_log2): Use pow2p_hwi.
(ctz_hwi, ffs_hwi): Use least_bit_hwi.
* alias.c (memrefs_conflict_p): Use pow2_or_zerop.
* builtins.c (get_object_alignment_2, get_object_alignment)
(get_pointer_alignment, fold_builtin_atomic_always_lock_free): Use
least_bit_hwi.
* calls.c (compute_argument_addresses, store_one_arg): Use
least_bit_hwi.
* cfgexpand.c (expand_one_stack_var_at): Use least_bit_hwi.
* combine.c (force_to_mode): Use least_bit_hwi.
* emit-rtl.c (set_mem_attributes_minus_bitpos, adjust_address_1):
Use least_bit_hwi.
* expmed.c (synth_mult, expand_divmod): Use ctz_or_zero, ctz_hwi.
(init_expmed_one_conv): Use pow2p_hwi.
* fold-const.c (round_up_loc, round_down_loc): Use pow2_or_zerop.
(fold_binary_loc): Use pow2p_hwi.
* function.c (assign_parm_find_stack_rtl): Use least_bit_hwi.
* gimple-fold.c (gimple_fold_builtin_memory_op): Use pow2p_hwi.
* gimple-ssa-strength-reduction.c (replace_ref): Use least_bit_hwi.
* hsa-gen.c (gen_hsa_addr_with_align, hsa_bitmemref_alignment):
Use least_bit_hwi.
* ipa-cp.c (ipcp_alignment_lattice::meet_with_1): Use least_bit_hwi.
* ipa-prop.c (ipa_modify_call_arguments): Use least_bit_hwi.
* omp-low.c (oacc_loop_fixed_partitions)
(oacc_loop_auto_partitions): Use least_bit_hwi.
* rtlanal.c (nonzero_bits1): Use ctz_or_zero.
* stor-layout.c (place_field): Use least_bit_hwi.
* tree-pretty-print.c (dump_generic_node): Use pow2p_hwi.
* tree-sra.c (build_ref_for_offset): Use least_bit_hwi.
* tree-ssa-ccp.c (ccp_finalize): Use least_bit_hwi.
* tree-ssa-math-opts.c (bswap_replace): Use least_bit_hwi.
* tree-ssa-strlen.c (handle_builtin_memcmp): Use pow2p_hwi.
* tree-vect-data-refs.c (vect_analyze_group_access_1)
(vect_grouped_store_supported, vect_grouped_load_supported)
(vect_permute_load_chain, vect_shift_permute_load_chain)
(vect_transform_grouped_load): Use pow2p_hwi.
* tree-vect-generic.c (expand_vector_divmod): Use ctz_or_zero.
* tree-vect-patterns.c (vect_recog_divmod_pattern): Use ctz_or_zero.
* tree-vect-stmts.c (vectorizable_mask_load_store): Use
least_bit_hwi.
* tsan.c (instrument_expr): Use least_bit_hwi.
* var-tracking.c (negative_power_of_two_p): Use pow2_or_zerop.
From-SVN: r240194
Diffstat (limited to 'gcc/hwint.h')
-rw-r--r-- | gcc/hwint.h | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/gcc/hwint.h b/gcc/hwint.h index 6b4d537..ea87b21 100644 --- a/gcc/hwint.h +++ b/gcc/hwint.h @@ -134,6 +134,31 @@ typedef HOST_WIDE_INT __gcc_host_wide_int__; #endif /* Inline functions operating on HOST_WIDE_INT. */ + +/* Return X with all but the lowest bit masked off. */ + +static inline unsigned HOST_WIDE_INT +least_bit_hwi (unsigned HOST_WIDE_INT x) +{ + return (x & -x); +} + +/* True if X is zero or a power of two. */ + +static inline bool +pow2_or_zerop (unsigned HOST_WIDE_INT x) +{ + return least_bit_hwi (x) == x; +} + +/* True if X is a power of two. */ + +static inline bool +pow2p_hwi (unsigned HOST_WIDE_INT x) +{ + return x && pow2_or_zerop (x); +} + #if GCC_VERSION < 3004 extern int clz_hwi (unsigned HOST_WIDE_INT x); @@ -222,7 +247,7 @@ ceil_log2 (unsigned HOST_WIDE_INT x) static inline int exact_log2 (unsigned HOST_WIDE_INT x) { - return x == (x & -x) && x ? ctz_hwi (x) : -1; + return pow2p_hwi (x) ? ctz_hwi (x) : -1; } #endif /* GCC_VERSION >= 3004 */ @@ -238,6 +263,14 @@ extern HOST_WIDE_INT pos_mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT); extern HOST_WIDE_INT mul_hwi (HOST_WIDE_INT, HOST_WIDE_INT); extern HOST_WIDE_INT least_common_multiple (HOST_WIDE_INT, HOST_WIDE_INT); +/* Like ctz_hwi, except 0 when x == 0. */ + +static inline int +ctz_or_zero (unsigned HOST_WIDE_INT x) +{ + return ffs_hwi (x) - 1; +} + /* Sign extend SRC starting from PREC. */ static inline HOST_WIDE_INT |