From: Aldy Hernandez Date: Fri, 24 Aug 2018 18:37:51 +0000 (+0000) Subject: gimple-ssa-evrp-analyze.c (set_ssa_range_info): Pass value_range to range_includes_ze... X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=e5a3f08fb899af4efef8d273d9aea556406ebd27;p=gcc.git gimple-ssa-evrp-analyze.c (set_ssa_range_info): Pass value_range to range_includes_zero_p. * gimple-ssa-evrp-analyze.c (set_ssa_range_info): Pass value_range to range_includes_zero_p. Do not special case VR_ANTI_RANGE. * tree-vrp.c (range_is_nonnull): Remove. (range_includes_zero_p): Accept value_range instead of min/max. (extract_range_from_binary_expr_1): Do not early bail on POINTER_PLUS_EXPR. Use range_includes_zero_p instead of range_is_nonnull. (extract_range_from_unary_expr): Use range_includes_zero_p instead of range_is_nonnull. (vrp_meet_1): Pass value_range to range_includes_zero_p. Do not special case VR_ANTI_RANGE. (vrp_finalize): Same. * tree-vrp.h (range_includes_zero_p): Pass value_range as argument instead of min/max. (range_is_nonnull): Remove. * vr-values.c (vrp_stmt_computes_nonzero): Use range_includes_zero_p instead of range_is_nonnull. (extract_range_basic): Pass value_range to range_includes_zero_p instead of range_is_nonnull. From-SVN: r263842 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3838777a0b5..fd7e95f9af8 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,25 @@ +2018-08-24 Aldy Hernandez + + * gimple-ssa-evrp-analyze.c (set_ssa_range_info): Pass value_range + to range_includes_zero_p. Do not special case VR_ANTI_RANGE. + * tree-vrp.c (range_is_nonnull): Remove. + (range_includes_zero_p): Accept value_range instead of min/max. + (extract_range_from_binary_expr_1): Do not early bail on + POINTER_PLUS_EXPR. + Use range_includes_zero_p instead of range_is_nonnull. + (extract_range_from_unary_expr): Use range_includes_zero_p instead + of range_is_nonnull. + (vrp_meet_1): Pass value_range to range_includes_zero_p. Do not + special case VR_ANTI_RANGE. + (vrp_finalize): Same. + * tree-vrp.h (range_includes_zero_p): Pass value_range as argument + instead of min/max. + (range_is_nonnull): Remove. + * vr-values.c (vrp_stmt_computes_nonzero): Use + range_includes_zero_p instead of range_is_nonnull. + (extract_range_basic): Pass value_range to range_includes_zero_p + instead of range_is_nonnull. + 2018-08-24 Uros Bizjak * emit-rtl.c (init_emit_once): Do not emit MODE_POINTER_BOUNDS RTXes. diff --git a/gcc/gimple-ssa-evrp-analyze.c b/gcc/gimple-ssa-evrp-analyze.c index b9dcf906ff7..e9afa80e191 100644 --- a/gcc/gimple-ssa-evrp-analyze.c +++ b/gcc/gimple-ssa-evrp-analyze.c @@ -119,12 +119,7 @@ evrp_range_analyzer::set_ssa_range_info (tree lhs, value_range *vr) wi::to_wide (vr->max)); } else if (POINTER_TYPE_P (TREE_TYPE (lhs)) - && ((vr->type == VR_RANGE - && range_includes_zero_p (vr->min, - vr->max) == 0) - || (vr->type == VR_ANTI_RANGE - && range_includes_zero_p (vr->min, - vr->max) == 1))) + && range_includes_zero_p (vr) == 0) set_ptr_nonnull (lhs); } diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index 735b3646e81..f20730a85ba 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -502,17 +502,6 @@ vrp_bitmap_equal_p (const_bitmap b1, const_bitmap b2) && bitmap_equal_p (b1, b2))); } -/* Return true if VR is ~[0, 0]. */ - -bool -range_is_nonnull (value_range *vr) -{ - return vr->type == VR_ANTI_RANGE - && integer_zerop (vr->min) - && integer_zerop (vr->max); -} - - /* Return true if VR is [0, 0]. */ static inline bool @@ -880,14 +869,25 @@ value_ranges_intersect_p (value_range *vr0, value_range *vr1) } -/* Return 1 if [MIN, MAX] includes the value zero, 0 if it does not - include the value zero, -2 if we cannot tell. */ +/* Return TRUE if *VR includes the value zero. */ -int -range_includes_zero_p (tree min, tree max) +bool +range_includes_zero_p (const value_range *vr) { - tree zero = build_int_cst (TREE_TYPE (min), 0); - return value_inside_range (zero, min, max); + if (vr->type == VR_VARYING) + return true; + + /* Ughh, we don't know. We choose not to optimize. */ + if (vr->type == VR_UNDEFINED) + return true; + + tree zero = build_int_cst (TREE_TYPE (vr->min), 0); + if (vr->type == VR_ANTI_RANGE) + { + int res = value_inside_range (zero, vr->min, vr->max); + return res == 0 || res == -2; + } + return value_inside_range (zero, vr->min, vr->max) != 0; } /* Return true if *VR is know to only contain nonnegative values. */ @@ -1424,7 +1424,7 @@ extract_range_from_binary_expr_1 (value_range *vr, nullness, if both are non null, then the result is nonnull. If both are null, then the result is null. Otherwise they are varying. */ - if (range_is_nonnull (&vr0) && range_is_nonnull (&vr1)) + if (!range_includes_zero_p (&vr0) && !range_includes_zero_p (&vr1)) set_value_range_to_nonnull (vr, expr_type); else if (range_is_null (&vr0) && range_is_null (&vr1)) set_value_range_to_null (vr, expr_type); @@ -1435,11 +1435,8 @@ extract_range_from_binary_expr_1 (value_range *vr, { /* For pointer types, we are really only interested in asserting whether the expression evaluates to non-NULL. */ - if (range_is_nonnull (&vr0) - || range_is_nonnull (&vr1) - || (vr1.type == VR_RANGE - && !symbolic_range_p (&vr1) - && !range_includes_zero_p (vr1.min, vr1.max))) + if (!range_includes_zero_p (&vr0) + || !range_includes_zero_p (&vr1)) set_value_range_to_nonnull (vr, expr_type); else if (range_is_null (&vr0) && range_is_null (&vr1)) set_value_range_to_null (vr, expr_type); @@ -1450,7 +1447,7 @@ extract_range_from_binary_expr_1 (value_range *vr, { /* For pointer types, we are really only interested in asserting whether the expression evaluates to non-NULL. */ - if (range_is_nonnull (&vr0) && range_is_nonnull (&vr1)) + if (!range_includes_zero_p (&vr0) && !range_includes_zero_p (&vr1)) set_value_range_to_nonnull (vr, expr_type); else if (range_is_null (&vr0) || range_is_null (&vr1)) set_value_range_to_null (vr, expr_type); @@ -1888,7 +1885,7 @@ extract_range_from_unary_expr (value_range *vr, determining if it evaluates to NULL [0, 0] or non-NULL (~[0, 0]). */ if (POINTER_TYPE_P (type)) { - if (range_is_nonnull (&vr0)) + if (!range_includes_zero_p (&vr0)) set_value_range_to_nonnull (vr, type); else if (range_is_null (&vr0)) set_value_range_to_null (vr, type); @@ -6020,17 +6017,9 @@ vrp_meet_1 (value_range *vr0, const value_range *vr1) { /* Failed to find an efficient meet. Before giving up and setting the result to VARYING, see if we can at least derive a useful - anti-range. FIXME, all this nonsense about distinguishing - anti-ranges from ranges is necessary because of the odd - semantics of range_includes_zero_p and friends. */ - if (((saved.type == VR_RANGE - && range_includes_zero_p (saved.min, saved.max) == 0) - || (saved.type == VR_ANTI_RANGE - && range_includes_zero_p (saved.min, saved.max) == 1)) - && ((vr1->type == VR_RANGE - && range_includes_zero_p (vr1->min, vr1->max) == 0) - || (vr1->type == VR_ANTI_RANGE - && range_includes_zero_p (vr1->min, vr1->max) == 1))) + anti-range. */ + if (range_includes_zero_p (&saved) == 0 + && range_includes_zero_p (vr1) == 0) { set_value_range_to_nonnull (vr0, TREE_TYPE (saved.min)); @@ -6540,10 +6529,7 @@ vrp_prop::vrp_finalize (bool warn_array_bounds_p) continue; if (POINTER_TYPE_P (TREE_TYPE (name)) - && ((vr->type == VR_RANGE - && range_includes_zero_p (vr->min, vr->max) == 0) - || (vr->type == VR_ANTI_RANGE - && range_includes_zero_p (vr->min, vr->max) == 1))) + && range_includes_zero_p (vr) == 0) set_ptr_nonnull (name); else if (!POINTER_TYPE_P (TREE_TYPE (name))) set_range_info (name, vr->type, diff --git a/gcc/tree-vrp.h b/gcc/tree-vrp.h index 0c1fb3637cf..f8c1c0c8f72 100644 --- a/gcc/tree-vrp.h +++ b/gcc/tree-vrp.h @@ -86,7 +86,7 @@ extern void register_edge_assert_for (tree, edge, enum tree_code, tree, tree, vec &); extern bool stmt_interesting_for_vrp (gimple *); extern void set_value_range_to_varying (value_range *); -extern int range_includes_zero_p (tree, tree); +extern bool range_includes_zero_p (const value_range *); extern bool infer_value_range (gimple *, tree, tree_code *, tree *); extern void set_value_range_to_nonnull (value_range *, tree); @@ -96,7 +96,6 @@ extern void set_and_canonicalize_value_range (value_range *, enum value_range_type, tree, tree, bitmap); extern bool vrp_bitmap_equal_p (const_bitmap, const_bitmap); -extern bool range_is_nonnull (value_range *); extern tree value_range_constant_singleton (value_range *); extern bool symbolic_range_p (value_range *); extern int compare_values (tree, tree); diff --git a/gcc/vr-values.c b/gcc/vr-values.c index 33335f3da31..072d9a7b454 100644 --- a/gcc/vr-values.c +++ b/gcc/vr-values.c @@ -343,7 +343,7 @@ vr_values::vrp_stmt_computes_nonzero (gimple *stmt) && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME) { value_range *vr = get_value_range (TREE_OPERAND (base, 0)); - if (range_is_nonnull (vr)) + if (!range_includes_zero_p (vr)) return true; } } @@ -1107,12 +1107,8 @@ vr_values::extract_range_basic (value_range *vr, gimple *stmt) if (TREE_CODE (arg) == SSA_NAME) { value_range *vr0 = get_value_range (arg); - /* If arg is non-zero, then ffs or popcount - are non-zero. */ - if ((vr0->type == VR_RANGE - && range_includes_zero_p (vr0->min, vr0->max) == 0) - || (vr0->type == VR_ANTI_RANGE - && range_includes_zero_p (vr0->min, vr0->max) == 1)) + /* If arg is non-zero, then ffs or popcount are non-zero. */ + if (range_includes_zero_p (vr0) == 0) mini = 1; /* If some high bits are known to be zero, we can decrease the maximum. */