return trailer (idx, "range_of_expr", res, name, r);
}
-// Return the legacy global range for NAME if it has one, otherwise
-// return VARYING.
-
-static void
-get_range_global (irange &r, tree name)
-{
- tree type = TREE_TYPE (name);
-
- if (SSA_NAME_IS_DEFAULT_DEF (name))
- {
- tree sym = SSA_NAME_VAR (name);
- // Adapted from vr_values::get_lattice_entry().
- // Use a range from an SSA_NAME's available range.
- if (TREE_CODE (sym) == PARM_DECL)
- {
- // Try to use the "nonnull" attribute to create ~[0, 0]
- // anti-ranges for pointers. Note that this is only valid with
- // default definitions of PARM_DECLs.
- if (POINTER_TYPE_P (type)
- && ((cfun && nonnull_arg_p (sym)) || get_ptr_nonnull (name)))
- r.set_nonzero (type);
- else if (INTEGRAL_TYPE_P (type))
- {
- get_range_info (name, r);
- if (r.undefined_p ())
- r.set_varying (type);
- }
- else
- r.set_varying (type);
- }
- // If this is a local automatic with no definition, use undefined.
- else if (TREE_CODE (sym) != RESULT_DECL)
- r.set_undefined ();
- else
- r.set_varying (type);
- }
- else if (!POINTER_TYPE_P (type) && SSA_NAME_RANGE_INFO (name))
- {
- get_range_info (name, r);
- if (r.undefined_p ())
- r.set_varying (type);
- }
- else if (POINTER_TYPE_P (type) && SSA_NAME_PTR_INFO (name))
- {
- if (get_ptr_nonnull (name))
- r.set_nonzero (type);
- else
- r.set_varying (type);
- }
- else
- r.set_varying (type);
-}
-
-// ?? Like above, but only for default definitions of NAME. This is
-// so VRP passes using ranger do not start with known ranges,
-// otherwise we'd eliminate builtin_unreachables too early because of
-// inlining.
-//
-// Without this restriction, the test in g++.dg/tree-ssa/pr61034.C has
-// all of its unreachable calls removed too early. We should
-// investigate whether we should just adjust the test above.
-
-value_range
-gimple_range_global (tree name)
-{
- gcc_checking_assert (gimple_range_ssa_p (name));
- tree type = TREE_TYPE (name);
-
- if (SSA_NAME_IS_DEFAULT_DEF (name))
- {
- value_range vr;
- get_range_global (vr, name);
- return vr;
- }
- return value_range (type);
-}
-
-// ----------------------------------------------
-// global_range_query implementation.
-
-global_range_query global_ranges;
-
-// Like get_range_query, but for accessing global ranges.
-
-range_query *
-get_global_range_query ()
-{
- return &global_ranges;
-}
-
-bool
-global_range_query::range_of_expr (irange &r, tree expr, gimple *)
-{
- tree type = TREE_TYPE (expr);
-
- if (!irange::supports_type_p (type) || !gimple_range_ssa_p (expr))
- return get_tree_range (r, expr);
-
- get_range_global (r, expr);
-
- return true;
-}
-
gimple_ranger *
enable_ranger (struct function *fun)
{
// Flag to enable debugging the various internal Caches.
#define DEBUG_RANGE_CACHE (dump_file && (param_evrp_mode & EVRP_MODE_DEBUG))
-// Global ranges for SSA names using SSA_NAME_RANGE_INFO.
-
-class global_range_query : public range_query
-{
-public:
- bool range_of_expr (irange &r, tree expr, gimple * = NULL) OVERRIDE;
-};
-
-extern global_range_query global_ranges;
-extern value_range gimple_range_global (tree name);
-
extern gimple_ranger *enable_ranger (struct function *);
extern void disable_ranger (struct function *);
set_range_info (name, vr.kind (), min, max);
}
-/* Gets range information corresponding to ssa_name NAME and stores it
- in a value_range VR. Returns the value_range_kind. */
-
-enum value_range_kind
-get_range_info (const_tree name, irange &vr)
-{
- tree type = TREE_TYPE (name);
- gcc_checking_assert (!POINTER_TYPE_P (type));
- gcc_checking_assert (TREE_CODE (name) == SSA_NAME);
-
- range_info_def *ri = SSA_NAME_RANGE_INFO (name);
-
- /* Return VR_VARYING for SSA_NAMEs with NULL RANGE_INFO or SSA_NAMEs
- with integral types width > 2 * HOST_BITS_PER_WIDE_INT precision. */
- if (!ri || (GET_MODE_PRECISION (SCALAR_INT_TYPE_MODE (TREE_TYPE (name)))
- > 2 * HOST_BITS_PER_WIDE_INT))
- vr.set_varying (type);
- else
- vr.set (wide_int_to_tree (type, ri->get_min ()),
- wide_int_to_tree (type, ri->get_max ()),
- SSA_NAME_RANGE_TYPE (name));
-
- return vr.kind ();
-}
-
/* Set nonnull attribute to pointer NAME. */
void
pi->pt.null = 0;
}
-/* Return nonnull attribute of pointer NAME. */
-bool
-get_ptr_nonnull (const_tree name)
-{
- gcc_assert (POINTER_TYPE_P (TREE_TYPE (name)));
- struct ptr_info_def *pi = SSA_NAME_PTR_INFO (name);
- if (pi == NULL)
- return false;
- /* TODO Now pt->null is conservatively set to true in PTA
- analysis. vrp is the only pass (including ipa-vrp)
- that clears pt.null via set_ptr_nonull when it knows
- for sure. PTA will preserves the pt.null value set by VRP.
-
- When PTA analysis is improved, pt.anything, pt.nonlocal
- and pt.escaped may also has to be considered before
- deciding that pointer cannot point to NULL. */
- return !pi->pt.null;
-}
-
/* Change non-zero bits bitmask of NAME. */
void
extern void set_range_info (tree, enum value_range_kind, const wide_int_ref &,
const wide_int_ref &);
extern void set_range_info (tree, const value_range &);
-/* Gets the value range from SSA. */
-extern enum value_range_kind get_range_info (const_tree, irange &);
extern void set_nonzero_bits (tree, const wide_int_ref &);
extern wide_int get_nonzero_bits (const_tree);
extern bool ssa_name_has_boolean_range (tree);
extern void adjust_ptr_info_misalignment (struct ptr_info_def *, poly_uint64);
extern struct ptr_info_def *get_ptr_info (tree);
extern void set_ptr_nonnull (tree);
-extern bool get_ptr_nonnull (const_tree);
extern tree copy_ssa_name_fn (struct function *, tree, gimple *);
extern void duplicate_ssa_name_ptr_info (tree, struct ptr_info_def *);
#include "value-range-equiv.h"
#include "value-query.h"
#include "alloc-pool.h"
+#include "gimple-range.h"
// value_query default methods.
equiv_alloc->release ();
delete equiv_alloc;
}
+
+// Return the range for NAME from SSA_NAME_RANGE_INFO.
+
+static inline void
+get_ssa_name_range_info (irange &r, const_tree name)
+{
+ tree type = TREE_TYPE (name);
+ gcc_checking_assert (!POINTER_TYPE_P (type));
+ gcc_checking_assert (TREE_CODE (name) == SSA_NAME);
+
+ range_info_def *ri = SSA_NAME_RANGE_INFO (name);
+
+ // Return VR_VARYING for SSA_NAMEs with NULL RANGE_INFO or SSA_NAMEs
+ // with integral types width > 2 * HOST_BITS_PER_WIDE_INT precision.
+ if (!ri || (GET_MODE_PRECISION (SCALAR_INT_TYPE_MODE (TREE_TYPE (name)))
+ > 2 * HOST_BITS_PER_WIDE_INT))
+ r.set_varying (type);
+ else
+ r.set (wide_int_to_tree (type, ri->get_min ()),
+ wide_int_to_tree (type, ri->get_max ()),
+ SSA_NAME_RANGE_TYPE (name));
+}
+
+// Return nonnull attribute of pointer NAME from SSA_NAME_PTR_INFO.
+
+static inline bool
+get_ssa_name_ptr_info_nonnull (const_tree name)
+{
+ gcc_assert (POINTER_TYPE_P (TREE_TYPE (name)));
+ struct ptr_info_def *pi = SSA_NAME_PTR_INFO (name);
+ if (pi == NULL)
+ return false;
+ /* TODO Now pt->null is conservatively set to true in PTA
+ analysis. vrp is the only pass (including ipa-vrp)
+ that clears pt.null via set_ptr_nonull when it knows
+ for sure. PTA will preserves the pt.null value set by VRP.
+
+ When PTA analysis is improved, pt.anything, pt.nonlocal
+ and pt.escaped may also has to be considered before
+ deciding that pointer cannot point to NULL. */
+ return !pi->pt.null;
+}
+
+// Return the legacy global range for NAME if it has one, otherwise
+// return VARYING.
+
+static void
+get_range_global (irange &r, tree name)
+{
+ tree type = TREE_TYPE (name);
+
+ if (SSA_NAME_IS_DEFAULT_DEF (name))
+ {
+ tree sym = SSA_NAME_VAR (name);
+ // Adapted from vr_values::get_lattice_entry().
+ // Use a range from an SSA_NAME's available range.
+ if (TREE_CODE (sym) == PARM_DECL)
+ {
+ // Try to use the "nonnull" attribute to create ~[0, 0]
+ // anti-ranges for pointers. Note that this is only valid with
+ // default definitions of PARM_DECLs.
+ if (POINTER_TYPE_P (type)
+ && ((cfun && nonnull_arg_p (sym))
+ || get_ssa_name_ptr_info_nonnull (name)))
+ r.set_nonzero (type);
+ else if (INTEGRAL_TYPE_P (type))
+ {
+ get_ssa_name_range_info (r, name);
+ if (r.undefined_p ())
+ r.set_varying (type);
+ }
+ else
+ r.set_varying (type);
+ }
+ // If this is a local automatic with no definition, use undefined.
+ else if (TREE_CODE (sym) != RESULT_DECL)
+ r.set_undefined ();
+ else
+ r.set_varying (type);
+ }
+ else if (!POINTER_TYPE_P (type) && SSA_NAME_RANGE_INFO (name))
+ {
+ get_ssa_name_range_info (r, name);
+ if (r.undefined_p ())
+ r.set_varying (type);
+ }
+ else if (POINTER_TYPE_P (type) && SSA_NAME_PTR_INFO (name))
+ {
+ if (get_ssa_name_ptr_info_nonnull (name))
+ r.set_nonzero (type);
+ else
+ r.set_varying (type);
+ }
+ else
+ r.set_varying (type);
+}
+
+// ?? Like above, but only for default definitions of NAME. This is
+// so VRP passes using ranger do not start with known ranges,
+// otherwise we'd eliminate builtin_unreachables too early because of
+// inlining.
+//
+// Without this restriction, the test in g++.dg/tree-ssa/pr61034.C has
+// all of its unreachable calls removed too early. We should
+// investigate whether we should just adjust the test above.
+
+value_range
+gimple_range_global (tree name)
+{
+ gcc_checking_assert (gimple_range_ssa_p (name));
+ tree type = TREE_TYPE (name);
+
+ if (SSA_NAME_IS_DEFAULT_DEF (name))
+ {
+ value_range vr;
+ get_range_global (vr, name);
+ return vr;
+ }
+ return value_range (type);
+}
+
+// ----------------------------------------------
+// global_range_query implementation.
+
+global_range_query global_ranges;
+
+// Like get_range_query, but for accessing global ranges.
+
+range_query *
+get_global_range_query ()
+{
+ return &global_ranges;
+}
+
+bool
+global_range_query::range_of_expr (irange &r, tree expr, gimple *)
+{
+ tree type = TREE_TYPE (expr);
+
+ if (!irange::supports_type_p (type) || !gimple_range_ssa_p (expr))
+ return get_tree_range (r, expr);
+
+ get_range_global (r, expr);
+
+ return true;
+}
class equiv_allocator *equiv_alloc;
};
+// Global ranges for SSA names using SSA_NAME_RANGE_INFO.
+
+class global_range_query : public range_query
+{
+public:
+ bool range_of_expr (irange &r, tree expr, gimple * = NULL) OVERRIDE;
+};
+
+extern global_range_query global_ranges;
+extern value_range gimple_range_global (tree name);
+
#endif // GCC_QUERY_H
projects / thirdparty / gcc.git / commitdiff
