diff options
| author | Richard Sandiford <richard.sandiford@arm.com> | 2016-05-02 09:39:09 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2016-05-02 09:39:09 +0000 |
| commit | 032c80e999eac4288ff1b0f752e15c8e7c5cdf51 (patch) | |
| tree | 246e0c0732538d6aaa57d527e1ad81e531ce8ace /gcc/gimple-ssa-strength-reduction.c | |
| parent | cd1e4d417a91f4e802e745c8ff6cc6d88a2e96c1 (diff) | |
| download | gcc-032c80e999eac4288ff1b0f752e15c8e7c5cdf51.tar.gz | |
Support <, <=, > and >= for offset_int and widest_int
offset_int and widest_int are supposed to be at least one bit wider
than all the values they need to represent, with the extra bits
being signs. Thus offset_int is effectively int128_t and widest_int
is effectively intNNN_t, for target-dependent NNN.
Because the types are signed, there's not really any need to specify
a sign for operations like comparison. I think things would be clearer
if we supported <, <=, > and >= for them (but not for wide_int, which
doesn't have a sign).
Tested on x86_64-linux-gnu and aarch64-linux-gnu.
gcc/
* wide-int.h: Update offset_int and widest_int documentation.
(WI_SIGNED_BINARY_PREDICATE_RESULT): New macro.
(wi::binary_traits): Allow ordered comparisons between offset_int and
offset_int, between widest_int and widest_int, and between either
of these types and basic C types.
(operator <, <=, >, >=): Define for the same combinations.
* tree.h (tree_int_cst_lt): Use comparison operators instead
of wi:: comparisons.
(tree_int_cst_le): Likewise.
* gimple-fold.c (fold_array_ctor_reference): Likewise.
(fold_nonarray_ctor_reference): Likewise.
* gimple-ssa-strength-reduction.c (record_increment): Likewise.
* tree-affine.c (aff_comb_cannot_overlap_p): Likewise.
* tree-parloops.c (try_transform_to_exit_first_loop_alt): Likewise.
* tree-sra.c (completely_scalarize): Likewise.
* tree-ssa-alias.c (stmt_kills_ref_p): Likewise.
* tree-ssa-reassoc.c (extract_bit_test_mask): Likewise.
* tree-vrp.c (extract_range_from_binary_expr_1): Likewise.
(check_for_binary_op_overflow): Likewise.
(search_for_addr_array): Likewise.
* ubsan.c (ubsan_expand_objsize_ifn): Likewise.
From-SVN: r235719
Diffstat (limited to 'gcc/gimple-ssa-strength-reduction.c')
| -rw-r--r-- | gcc/gimple-ssa-strength-reduction.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/gcc/gimple-ssa-strength-reduction.c b/gcc/gimple-ssa-strength-reduction.c index 46ee7a75b76..b2351511fe0 100644 --- a/gcc/gimple-ssa-strength-reduction.c +++ b/gcc/gimple-ssa-strength-reduction.c @@ -2506,8 +2506,7 @@ record_increment (slsr_cand_t c, widest_int increment, bool is_phi_adjust) if (c->kind == CAND_ADD && !is_phi_adjust && c->index == increment - && (wi::gts_p (increment, 1) - || wi::lts_p (increment, -1)) + && (increment > 1 || increment < -1) && (gimple_assign_rhs_code (c->cand_stmt) == PLUS_EXPR || gimple_assign_rhs_code (c->cand_stmt) == POINTER_PLUS_EXPR)) { |