TYPE_{MIN,MAX}_VALUE. */
static inline bool
-needs_overflow_infinity (tree type)
+needs_overflow_infinity (const_tree type)
{
return INTEGRAL_TYPE_P (type) && !TYPE_OVERFLOW_WRAPS (type);
}
VARYING. */
static inline bool
-supports_overflow_infinity (tree type)
+supports_overflow_infinity (const_tree type)
{
#ifdef ENABLE_CHECKING
gcc_assert (needs_overflow_infinity (type));
/* Return whether VAL is a negative overflow infinity. */
static inline bool
-is_negative_overflow_infinity (tree val)
+is_negative_overflow_infinity (const_tree val)
{
return (needs_overflow_infinity (TREE_TYPE (val))
&& CONSTANT_CLASS_P (val)
/* Return whether VAL is a positive overflow infinity. */
static inline bool
-is_positive_overflow_infinity (tree val)
+is_positive_overflow_infinity (const_tree val)
{
return (needs_overflow_infinity (TREE_TYPE (val))
&& CONSTANT_CLASS_P (val)
/* Return whether VAL is a positive or negative overflow infinity. */
static inline bool
-is_overflow_infinity (tree val)
+is_overflow_infinity (const_tree val)
{
return (needs_overflow_infinity (TREE_TYPE (val))
&& CONSTANT_CLASS_P (val)
to the integer constant with the same value in the type. */
static inline bool
-vrp_val_is_max (tree val)
+vrp_val_is_max (const_tree val)
{
tree type_max = TYPE_MAX_VALUE (TREE_TYPE (val));
will be true for a negative overflow infinity. */
static inline bool
-vrp_val_is_min (tree val)
+vrp_val_is_min (const_tree val)
{
tree type_min = TYPE_MIN_VALUE (TREE_TYPE (val));
current function signature. */
static bool
-nonnull_arg_p (tree arg)
+nonnull_arg_p (const_tree arg)
{
tree t, attrs, fntype;
unsigned HOST_WIDE_INT arg_num;
return NULL. Otherwise create an empty range if none existed for VAR. */
static value_range_t *
-get_value_range (tree var)
+get_value_range (const_tree var)
{
value_range_t *vr;
tree sym;
/* Return true, if VAL1 and VAL2 are equal values for VRP purposes. */
static inline bool
-vrp_operand_equal_p (tree val1, tree val2)
+vrp_operand_equal_p (const_tree val1, const_tree val2)
{
if (val1 == val2)
return true;
/* Return true, if the bitmaps B1 and B2 are equal. */
static inline bool
-vrp_bitmap_equal_p (bitmap b1, bitmap b2)
+vrp_bitmap_equal_p (const_bitmap b1, const_bitmap b2)
{
return (b1 == b2
|| (b1 && b2
is the range object associated with another SSA name. */
static inline bool
-update_value_range (tree var, value_range_t *new_vr)
+update_value_range (const_tree var, value_range_t *new_vr)
{
value_range_t *old_vr;
bool is_new;
point where equivalence processing can be turned on/off. */
static void
-add_equivalence (bitmap *equiv, tree var)
+add_equivalence (bitmap *equiv, const_tree var)
{
unsigned ver = SSA_NAME_VERSION (var);
value_range_t *vr = vr_value[ver];
false otherwise or if no value range information is available. */
bool
-ssa_name_nonnegative_p (tree t)
+ssa_name_nonnegative_p (const_tree t)
{
value_range_t *vr = get_value_range (t);
false otherwise or if no value range information is available. */
bool
-ssa_name_nonzero_p (tree t)
+ssa_name_nonzero_p (const_tree t)
{
value_range_t *vr = get_value_range (t);
if (vr->type == VR_ANTI_RANGE)
return;
+ /* Ensure that there are not values in the scev cache based on assumptions
+ on ranges of ssa names that were changed
+ (in set_value_range/set_value_range_to_varying). Preserve cached numbers
+ of iterations, that were computed before the start of VRP (we do not
+ recompute these each time to save the compile time). */
+ scev_reset_except_niters ();
+
chrec = instantiate_parameters (loop, analyze_scalar_evolution (loop, var));
/* Like in PR19590, scev can return a constant function. */
if (is_gimple_min_invariant (chrec))
{
- set_value_range (vr, VR_RANGE, chrec, chrec, vr->equiv);
+ set_value_range_to_value (vr, chrec, vr->equiv);
return;
}
point values. */
static inline bool
-fp_predicate (tree expr)
+fp_predicate (const_tree expr)
{
return (COMPARISON_CLASS_P (expr)
&& FLOAT_TYPE_P (TREE_TYPE (TREE_OPERAND (expr, 0))));
low_sub = up_sub = TREE_OPERAND (ref, 1);
- if (!up_bound || !locus || TREE_NO_WARNING (ref)
+ if (!up_bound || TREE_NO_WARNING (ref)
|| TREE_CODE (up_bound) != INTEGER_CST
/* Can not check flexible arrays. */
|| (TYPE_SIZE (TREE_TYPE (ref)) == NULL_TREE
tree stmt = (tree)data;
location_t *location = EXPR_LOCUS (stmt);
+ if (!EXPR_HAS_LOCATION (stmt))
+ {
+ *walk_subtree = FALSE;
+ return NULL_TREE;
+ }
+
*walk_subtree = TRUE;
if (TREE_CODE (t) == ARRAY_REF)
vr_phi_edge_counts = NULL;
}
+/* Calculates number of iterations for all loops, to ensure that they are
+ cached. */
+
+static void
+record_numbers_of_iterations (void)
+{
+ loop_iterator li;
+ struct loop *loop;
+
+ FOR_EACH_LOOP (li, loop, 0)
+ {
+ number_of_latch_executions (loop);
+ }
+}
/* Main entry point to VRP (Value Range Propagation). This pass is
loosely based on J. R. C. Patterson, ``Accurate Static Branch
insert_range_assertions ();
+ /* Compute the # of iterations for each loop before we start the VRP
+ analysis. The value ranges determined by VRP are used in expression
+ simplification, that is also used by the # of iterations analysis.
+ However, in the middle of the VRP analysis, the value ranges do not take
+ all the possible paths in CFG into account, so they do not have to be
+ correct, and the # of iterations analysis can obtain wrong results.
+ This is a problem, since the results of the # of iterations analysis
+ are cached, so these mistakes would not be corrected when the value
+ ranges are corrected. */
+ record_numbers_of_iterations ();
+
vrp_initialize ();
ssa_propagate (vrp_visit_stmt, vrp_visit_phi_node);
vrp_finalize ();
OSDN Git Service
