#include "system.h"
#include "coretypes.h"
#include "backend.h"
-#include "insn-codes.h"
-#include "rtl.h"
#include "tree.h"
#include "gimple.h"
#include "ssa.h"
#include "gimple-pretty-print.h"
#include "gimple-iterator.h"
-#include "optabs-tree.h"
-#include "gimple-fold.h"
#include "tree-cfg.h"
#include "fold-const.h"
#include "tree-cfg.h"
-#include "wide-int.h"
-#include "fold-const.h"
-#include "case-cfn-macros.h"
-#include "omp-general.h"
-#include "cfgloop.h"
-#include "tree-ssa-loop.h"
-#include "tree-scalar-evolution.h"
-#include "dbgcnt.h"
-#include "alloc-pool.h"
-#include "vr-values.h"
-#include "gimple-range.h"
-
-// Evaluate expression EXPR using the source information the class was
-// instantiated with. Place the result in R, and return TRUE. If a range
-// cannot be calculated, return FALSE.
-
-bool
-fur_source::get_operand (irange &r, tree expr)
-{
- return get_range_query (cfun)->range_of_expr (r, expr);
-}
-
-// Evaluate EXPR for this stmt as a PHI argument on edge E. Use the current
-// range_query to get the range on the edge.
-
-bool
-fur_source::get_phi_operand (irange &r, tree expr, edge e)
-{
- return get_range_query (cfun)->range_on_edge (r, e, expr);
-}
-
-// Default is to not register any dependencies from fold_using_range.
-
-void
-fur_source::register_dependency (tree lhs ATTRIBUTE_UNUSED,
- tree rhs ATTRIBUTE_UNUSED)
-{
-}
-
-// Default object is the current range query.
-
-range_query *
-fur_source::query ()
-{
- return get_range_query (cfun);
-}
-
-// This version of fur_source will pick a range up off an edge.
-
-class fur_edge : public fur_source
-{
-public:
- fur_edge (edge e, range_query *q = NULL);
- virtual bool get_operand (irange &r, tree expr) OVERRIDE;
- virtual bool get_phi_operand (irange &r, tree expr, edge e) OVERRIDE;
- virtual range_query *query () OVERRIDE;
-private:
- range_query *m_query;
- edge m_edge;
-};
-
-// Instantiate an edge based fur_source.
-
-inline
-fur_edge::fur_edge (edge e, range_query *q)
-{
- m_edge = e;
- if (q)
- m_query = q;
- else
- m_query = get_range_query (cfun);
-}
-
-// Get the value of EXPR on edge m_edge.
-
-bool
-fur_edge::get_operand (irange &r, tree expr)
-{
- return m_query->range_on_edge (r, m_edge, expr);
-}
-
-// Evaluate EXPR for this stmt as a PHI argument on edge E. Use the current
-// range_query to get the range on the edge.
-
-bool
-fur_edge::get_phi_operand (irange &r, tree expr, edge e)
-{
- // edge to edge recalculations not supoprted yet, until we sort it out.
- gcc_checking_assert (e == m_edge);
- return m_query->range_on_edge (r, e, expr);
-}
-
-// Return the current range_query object.
-
-range_query *
-fur_edge::query ()
-{
- return m_query;
-}
-
-// Instantiate a stmt based fur_source.
-
-fur_stmt::fur_stmt (gimple *s, range_query *q)
-{
- m_stmt = s;
- if (q)
- m_query = q;
- else
- m_query = get_global_range_query ();
-}
-
-// Retrieve range of EXPR as it occurs as a use on stmt M_STMT.
-
-bool
-fur_stmt::get_operand (irange &r, tree expr)
-{
- return m_query->range_of_expr (r, expr, m_stmt);
-}
-
-// Evaluate EXPR for this stmt as a PHI argument on edge E. Use the current
-// range_query to get the range on the edge.
-
-bool
-fur_stmt::get_phi_operand (irange &r, tree expr, edge e)
-{
- // Pick up the range of expr from edge E.
- fur_edge e_src (e, m_query);
- return e_src.get_operand (r, expr);
-}
-
-// Return the current range_query object.
-
-range_query *
-fur_stmt::query ()
-{
- return m_query;
-}
-
-// This version of fur_source will pick a range from a stmt, and also register
-// dependencies via a gori_compute object. This is mostly an internal API.
-
-class fur_depend : public fur_stmt
-{
-public:
- fur_depend (gimple *s, gori_compute *gori, range_query *q = NULL);
- virtual void register_dependency (tree lhs, tree rhs) OVERRIDE;
-private:
- gori_compute *m_gori;
-};
-
-// Instantiate a stmt based fur_source with a GORI object
-
-inline
-fur_depend::fur_depend (gimple *s, gori_compute *gori, range_query *q)
- : fur_stmt (s, q)
-{
- gcc_checking_assert (gori);
- m_gori = gori;
-}
-
-// find and add any dependnecy between LHS and RHS
-
-void
-fur_depend::register_dependency (tree lhs, tree rhs)
-{
- m_gori->register_dependency (lhs, rhs);
-}
-
-// This version of fur_source will pick a range up from a list of ranges
-// supplied by the caller.
-
-class fur_list : public fur_source
-{
-public:
- fur_list (irange &r1);
- fur_list (irange &r1, irange &r2);
- fur_list (unsigned num, irange *list);
- virtual bool get_operand (irange &r, tree expr) OVERRIDE;
- virtual bool get_phi_operand (irange &r, tree expr, edge e) OVERRIDE;
-private:
- int_range_max m_local[2];
- irange *m_list;
- unsigned m_index;
- unsigned m_limit;
-};
-
-// One range supplied for unary operations.
-
-fur_list::fur_list (irange &r1)
-{
- m_list = m_local;
- m_index = 0;
- m_limit = 1;
- m_local[0] = r1;
-}
-
-// Two ranges supplied for binary operations.
-
-fur_list::fur_list (irange &r1, irange &r2)
-{
- m_list = m_local;
- m_index = 0;
- m_limit = 2;
- m_local[0] = r1;
- m_local[0] = r2;
-}
-
-// Arbitrary number of ranges in a vector.
-
-fur_list::fur_list (unsigned num, irange *list)
-{
- m_list = list;
- m_index = 0;
- m_limit = num;
-}
-
-// Get the next operand from the vector, ensure types are compatible.
-
-bool
-fur_list::get_operand (irange &r, tree expr)
-{
- if (m_index >= m_limit)
- return get_range_query (cfun)->range_of_expr (r, expr);
- r = m_list[m_index++];
- gcc_checking_assert (range_compatible_p (TREE_TYPE (expr), r.type ()));
- return true;
-}
-
-// This will simply pick the next operand from the vector.
-bool
-fur_list::get_phi_operand (irange &r, tree expr, edge e ATTRIBUTE_UNUSED)
-{
- return get_operand (r, expr);
-}
-
-// Fold stmt S into range R using R1 as the first operand.
-
-bool
-fold_range (irange &r, gimple *s, irange &r1)
-{
- fold_using_range f;
- fur_list src (r1);
- return f.fold_stmt (r, s, src);
-}
-
-// Fold stmt S into range R using R1 and R2 as the first two operands.
-
-bool
-fold_range (irange &r, gimple *s, irange &r1, irange &r2)
-{
- fold_using_range f;
- fur_list src (r1, r2);
- return f.fold_stmt (r, s, src);
-}
-
-
-// Fold stmt S into range R using NUM_ELEMENTS from VECTOR as the initial
-// operands encountered.
-
-bool
-fold_range (irange &r, gimple *s, unsigned num_elements, irange *vector)
-{
- fold_using_range f;
- fur_list src (num_elements, vector);
- return f.fold_stmt (r, s, src);
-}
-
-// Fold stmt S into range R using range query Q.
-
-bool
-fold_range (irange &r, gimple *s, range_query *q)
-{
- fold_using_range f;
- fur_stmt src (s, q);
- return f.fold_stmt (r, s, src);
-}
-
-// Recalculate stmt S into R using range query Q as if it were on edge ON_EDGE.
-
-bool
-fold_range (irange &r, gimple *s, edge on_edge, range_query *q)
-{
- fold_using_range f;
- fur_edge src (on_edge, q);
- return f.fold_stmt (r, s, src);
-}
-
-// -------------------------------------------------------------------------
-
-// Adjust the range for a pointer difference where the operands came
-// from a memchr.
-//
-// This notices the following sequence:
-//
-// def = __builtin_memchr (arg, 0, sz)
-// n = def - arg
-//
-// The range for N can be narrowed to [0, PTRDIFF_MAX - 1].
-
-static void
-adjust_pointer_diff_expr (irange &res, const gimple *diff_stmt)
-{
- tree op0 = gimple_assign_rhs1 (diff_stmt);
- tree op1 = gimple_assign_rhs2 (diff_stmt);
- tree op0_ptype = TREE_TYPE (TREE_TYPE (op0));
- tree op1_ptype = TREE_TYPE (TREE_TYPE (op1));
- gimple *call;
-
- if (TREE_CODE (op0) == SSA_NAME
- && TREE_CODE (op1) == SSA_NAME
- && (call = SSA_NAME_DEF_STMT (op0))
- && is_gimple_call (call)
- && gimple_call_builtin_p (call, BUILT_IN_MEMCHR)
- && TYPE_MODE (op0_ptype) == TYPE_MODE (char_type_node)
- && TYPE_PRECISION (op0_ptype) == TYPE_PRECISION (char_type_node)
- && TYPE_MODE (op1_ptype) == TYPE_MODE (char_type_node)
- && TYPE_PRECISION (op1_ptype) == TYPE_PRECISION (char_type_node)
- && gimple_call_builtin_p (call, BUILT_IN_MEMCHR)
- && vrp_operand_equal_p (op1, gimple_call_arg (call, 0))
- && integer_zerop (gimple_call_arg (call, 1)))
- {
- tree max = vrp_val_max (ptrdiff_type_node);
- wide_int wmax = wi::to_wide (max, TYPE_PRECISION (TREE_TYPE (max)));
- tree expr_type = gimple_expr_type (diff_stmt);
- tree range_min = build_zero_cst (expr_type);
- tree range_max = wide_int_to_tree (expr_type, wmax - 1);
- int_range<2> r (range_min, range_max);
- res.intersect (r);
- }
-}
-
-// This function looks for situations when walking the use/def chains
-// may provide additonal contextual range information not exposed on
-// this statement. Like knowing the IMAGPART return value from a
-// builtin function is a boolean result.
-
-// We should rework how we're called, as we have an op_unknown entry
-// for IMAGPART_EXPR and POINTER_DIFF_EXPR in range-ops just so this
-// function gets called.
-
-static void
-gimple_range_adjustment (irange &res, const gimple *stmt)
-{
- switch (gimple_expr_code (stmt))
- {
- case POINTER_DIFF_EXPR:
- adjust_pointer_diff_expr (res, stmt);
- return;
-
- case IMAGPART_EXPR:
- {
- tree name = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0);
- if (TREE_CODE (name) == SSA_NAME)
- {
- gimple *def_stmt = SSA_NAME_DEF_STMT (name);
- if (def_stmt && is_gimple_call (def_stmt)
- && gimple_call_internal_p (def_stmt))
- {
- switch (gimple_call_internal_fn (def_stmt))
- {
- case IFN_ADD_OVERFLOW:
- case IFN_SUB_OVERFLOW:
- case IFN_MUL_OVERFLOW:
- case IFN_ATOMIC_COMPARE_EXCHANGE:
- {
- int_range<2> r;
- r.set_varying (boolean_type_node);
- tree type = TREE_TYPE (gimple_assign_lhs (stmt));
- range_cast (r, type);
- res.intersect (r);
- }
- default:
- break;
- }
- }
- }
- break;
- }
-
- default:
- break;
- }
-}
-
-// Return the base of the RHS of an assignment.
-
-static tree
-gimple_range_base_of_assignment (const gimple *stmt)
-{
- gcc_checking_assert (gimple_code (stmt) == GIMPLE_ASSIGN);
- tree op1 = gimple_assign_rhs1 (stmt);
- if (gimple_assign_rhs_code (stmt) == ADDR_EXPR)
- return get_base_address (TREE_OPERAND (op1, 0));
- return op1;
-}
-
-// Return the first operand of this statement if it is a valid operand
-// supported by ranges, otherwise return NULL_TREE. Special case is
-// &(SSA_NAME expr), return the SSA_NAME instead of the ADDR expr.
-
-tree
-gimple_range_operand1 (const gimple *stmt)
-{
- gcc_checking_assert (gimple_range_handler (stmt));
-
- switch (gimple_code (stmt))
- {
- case GIMPLE_COND:
- return gimple_cond_lhs (stmt);
- case GIMPLE_ASSIGN:
- {
- tree base = gimple_range_base_of_assignment (stmt);
- if (base && TREE_CODE (base) == MEM_REF)
- {
- // If the base address is an SSA_NAME, we return it
- // here. This allows processing of the range of that
- // name, while the rest of the expression is simply
- // ignored. The code in range_ops will see the
- // ADDR_EXPR and do the right thing.
- tree ssa = TREE_OPERAND (base, 0);
- if (TREE_CODE (ssa) == SSA_NAME)
- return ssa;
- }
- return base;
- }
- default:
- break;
- }
- return NULL;
-}
-
-// Return the second operand of statement STMT, otherwise return NULL_TREE.
-
-tree
-gimple_range_operand2 (const gimple *stmt)
-{
- gcc_checking_assert (gimple_range_handler (stmt));
-
- switch (gimple_code (stmt))
- {
- case GIMPLE_COND:
- return gimple_cond_rhs (stmt);
- case GIMPLE_ASSIGN:
- if (gimple_num_ops (stmt) >= 3)
- return gimple_assign_rhs2 (stmt);
- default:
- break;
- }
- return NULL_TREE;
-}
-
-// Calculate what we can determine of the range of this unary
-// statement's operand if the lhs of the expression has the range
-// LHS_RANGE. Return false if nothing can be determined.
-
-bool
-gimple_range_calc_op1 (irange &r, const gimple *stmt, const irange &lhs_range)
-{
- gcc_checking_assert (gimple_num_ops (stmt) < 3);
-
- // An empty range is viral.
- tree type = TREE_TYPE (gimple_range_operand1 (stmt));
- if (lhs_range.undefined_p ())
- {
- r.set_undefined ();
- return true;
- }
- // Unary operations require the type of the first operand in the
- // second range position.
- int_range<2> type_range (type);
- return gimple_range_handler (stmt)->op1_range (r, type, lhs_range,
- type_range);
-}
-
-// Calculate what we can determine of the range of this statement's
-// first operand if the lhs of the expression has the range LHS_RANGE
-// and the second operand has the range OP2_RANGE. Return false if
-// nothing can be determined.
-
-bool
-gimple_range_calc_op1 (irange &r, const gimple *stmt,
- const irange &lhs_range, const irange &op2_range)
-{
- // Unary operation are allowed to pass a range in for second operand
- // as there are often additional restrictions beyond the type which
- // can be imposed. See operator_cast::op1_range().
- tree type = TREE_TYPE (gimple_range_operand1 (stmt));
- // An empty range is viral.
- if (op2_range.undefined_p () || lhs_range.undefined_p ())
- {
- r.set_undefined ();
- return true;
- }
- return gimple_range_handler (stmt)->op1_range (r, type, lhs_range,
- op2_range);
-}
-
-// Calculate what we can determine of the range of this statement's
-// second operand if the lhs of the expression has the range LHS_RANGE
-// and the first operand has the range OP1_RANGE. Return false if
-// nothing can be determined.
-
-bool
-gimple_range_calc_op2 (irange &r, const gimple *stmt,
- const irange &lhs_range, const irange &op1_range)
-{
- tree type = TREE_TYPE (gimple_range_operand2 (stmt));
- // An empty range is viral.
- if (op1_range.undefined_p () || lhs_range.undefined_p ())
- {
- r.set_undefined ();
- return true;
- }
- return gimple_range_handler (stmt)->op2_range (r, type, lhs_range,
- op1_range);
-}
-
-// Calculate a range for statement S and return it in R. If NAME is provided it
-// represents the SSA_NAME on the LHS of the statement. It is only required
-// if there is more than one lhs/output. If a range cannot
-// be calculated, return false.
-
-bool
-fold_using_range::fold_stmt (irange &r, gimple *s, fur_source &src, tree name)
-{
- bool res = false;
- // If name and S are specified, make sure it is an LHS of S.
- gcc_checking_assert (!name || !gimple_get_lhs (s) ||
- name == gimple_get_lhs (s));
-
- if (!name)
- name = gimple_get_lhs (s);
-
- // Process addresses.
- if (gimple_code (s) == GIMPLE_ASSIGN
- && gimple_assign_rhs_code (s) == ADDR_EXPR)
- return range_of_address (r, s, src);
-
- if (gimple_range_handler (s))
- res = range_of_range_op (r, s, src);
- else if (is_a<gphi *>(s))
- res = range_of_phi (r, as_a<gphi *> (s), src);
- else if (is_a<gcall *>(s))
- res = range_of_call (r, as_a<gcall *> (s), src);
- else if (is_a<gassign *> (s) && gimple_assign_rhs_code (s) == COND_EXPR)
- res = range_of_cond_expr (r, as_a<gassign *> (s), src);
-
- if (!res)
- {
- // If no name is specified, try the expression kind.
- if (!name)
- {
- tree t = gimple_expr_type (s);
- if (!irange::supports_type_p (t))
- return false;
- r.set_varying (t);
- return true;
- }
- if (!gimple_range_ssa_p (name))
- return false;
- // We don't understand the stmt, so return the global range.
- r = gimple_range_global (name);
- return true;
- }
-
- if (r.undefined_p ())
- return true;
-
- // We sometimes get compatible types copied from operands, make sure
- // the correct type is being returned.
- if (name && TREE_TYPE (name) != r.type ())
- {
- gcc_checking_assert (range_compatible_p (r.type (), TREE_TYPE (name)));
- range_cast (r, TREE_TYPE (name));
- }
- return true;
-}
-
-// Calculate a range for range_op statement S and return it in R. If any
-// If a range cannot be calculated, return false.
-
-bool
-fold_using_range::range_of_range_op (irange &r, gimple *s, fur_source &src)
-{
- int_range_max range1, range2;
- tree type = gimple_expr_type (s);
- range_operator *handler = gimple_range_handler (s);
- gcc_checking_assert (handler);
- gcc_checking_assert (irange::supports_type_p (type));
-
- tree lhs = gimple_get_lhs (s);
- tree op1 = gimple_range_operand1 (s);
- tree op2 = gimple_range_operand2 (s);
-
- if (src.get_operand (range1, op1))
- {
- if (!op2)
- {
- // Fold range, and register any dependency if available.
- int_range<2> r2 (type);
- handler->fold_range (r, type, range1, r2);
- if (lhs)
- src.register_dependency (lhs, op1);
- }
- else if (src.get_operand (range2, op2))
- {
- // Fold range, and register any dependency if available.
- handler->fold_range (r, type, range1, range2);
- if (lhs)
- {
- src.register_dependency (lhs, op1);
- src.register_dependency (lhs, op2);
- }
- }
- else
- r.set_varying (type);
- }
- else
- r.set_varying (type);
- // Make certain range-op adjustments that aren't handled any other way.
- gimple_range_adjustment (r, s);
- return true;
-}
-
-// Calculate the range of an assignment containing an ADDR_EXPR.
-// Return the range in R.
-// If a range cannot be calculated, set it to VARYING and return true.
-
-bool
-fold_using_range::range_of_address (irange &r, gimple *stmt, fur_source &src)
-{
- gcc_checking_assert (gimple_code (stmt) == GIMPLE_ASSIGN);
- gcc_checking_assert (gimple_assign_rhs_code (stmt) == ADDR_EXPR);
-
- bool strict_overflow_p;
- tree expr = gimple_assign_rhs1 (stmt);
- poly_int64 bitsize, bitpos;
- tree offset;
- machine_mode mode;
- int unsignedp, reversep, volatilep;
- tree base = get_inner_reference (TREE_OPERAND (expr, 0), &bitsize,
- &bitpos, &offset, &mode, &unsignedp,
- &reversep, &volatilep);
-
-
- if (base != NULL_TREE
- && TREE_CODE (base) == MEM_REF
- && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME)
- {
- tree ssa = TREE_OPERAND (base, 0);
- tree lhs = gimple_get_lhs (stmt);
- if (lhs && gimple_range_ssa_p (ssa))
- src.register_dependency (lhs, ssa);
- gcc_checking_assert (irange::supports_type_p (TREE_TYPE (ssa)));
- src.get_operand (r, ssa);
- range_cast (r, TREE_TYPE (gimple_assign_rhs1 (stmt)));
-
- poly_offset_int off = 0;
- bool off_cst = false;
- if (offset == NULL_TREE || TREE_CODE (offset) == INTEGER_CST)
- {
- off = mem_ref_offset (base);
- if (offset)
- off += poly_offset_int::from (wi::to_poly_wide (offset),
- SIGNED);
- off <<= LOG2_BITS_PER_UNIT;
- off += bitpos;
- off_cst = true;
- }
- /* If &X->a is equal to X, the range of X is the result. */
- if (off_cst && known_eq (off, 0))
- return true;
- else if (flag_delete_null_pointer_checks
- && !TYPE_OVERFLOW_WRAPS (TREE_TYPE (expr)))
- {
- /* For -fdelete-null-pointer-checks -fno-wrapv-pointer we don't
- allow going from non-NULL pointer to NULL. */
- if(!range_includes_zero_p (&r))
- return true;
- }
- /* If MEM_REF has a "positive" offset, consider it non-NULL
- always, for -fdelete-null-pointer-checks also "negative"
- ones. Punt for unknown offsets (e.g. variable ones). */
- if (!TYPE_OVERFLOW_WRAPS (TREE_TYPE (expr))
- && off_cst
- && known_ne (off, 0)
- && (flag_delete_null_pointer_checks || known_gt (off, 0)))
- {
- r = range_nonzero (TREE_TYPE (gimple_assign_rhs1 (stmt)));
- return true;
- }
- r = int_range<2> (TREE_TYPE (gimple_assign_rhs1 (stmt)));
- return true;
- }
-
- // Handle "= &a".
- if (tree_single_nonzero_warnv_p (expr, &strict_overflow_p))
- {
- r = range_nonzero (TREE_TYPE (gimple_assign_rhs1 (stmt)));
- return true;
- }
-
- // Otherwise return varying.
- r = int_range<2> (TREE_TYPE (gimple_assign_rhs1 (stmt)));
- return true;
-}
-
-// Calculate a range for phi statement S and return it in R.
-// If a range cannot be calculated, return false.
-
-bool
-fold_using_range::range_of_phi (irange &r, gphi *phi, fur_source &src)
-{
- tree phi_def = gimple_phi_result (phi);
- tree type = TREE_TYPE (phi_def);
- int_range_max arg_range;
- unsigned x;
-
- if (!irange::supports_type_p (type))
- return false;
-
- // Start with an empty range, unioning in each argument's range.
- r.set_undefined ();
- for (x = 0; x < gimple_phi_num_args (phi); x++)
- {
- tree arg = gimple_phi_arg_def (phi, x);
- edge e = gimple_phi_arg_edge (phi, x);
-
- // Register potential dependencies for stale value tracking.
- if (gimple_range_ssa_p (arg))
- src.register_dependency (phi_def, arg);
-
- // Get the range of the argument on its edge.
- src.get_phi_operand (arg_range, arg, e);
- // If we're recomputing the argument elsewhere, try to refine it.
- r.union_ (arg_range);
- // Once the value reaches varying, stop looking.
- if (r.varying_p ())
- break;
- }
-
- // If SCEV is available, query if this PHI has any knonwn values.
- if (scev_initialized_p () && !POINTER_TYPE_P (TREE_TYPE (phi_def)))
- {
- value_range loop_range;
- class loop *l = loop_containing_stmt (phi);
- if (l && loop_outer (l))
- {
- range_of_ssa_name_with_loop_info (loop_range, phi_def, l, phi, src);
- if (!loop_range.varying_p ())
- {
- if (dump_file && (dump_flags & TDF_DETAILS))
- {
- fprintf (dump_file, " Loops range found for ");
- print_generic_expr (dump_file, phi_def, TDF_SLIM);
- fprintf (dump_file, ": ");
- loop_range.dump (dump_file);
- fprintf (dump_file, " and calculated range :");
- r.dump (dump_file);
- fprintf (dump_file, "\n");
- }
- r.intersect (loop_range);
- }
- }
- }
-
- return true;
-}
-
-// Calculate a range for call statement S and return it in R.
-// If a range cannot be calculated, return false.
-
-bool
-fold_using_range::range_of_call (irange &r, gcall *call, fur_source &src)
-{
- tree type = gimple_call_return_type (call);
- tree lhs = gimple_call_lhs (call);
- bool strict_overflow_p;
-
- if (!irange::supports_type_p (type))
- return false;
-
- if (range_of_builtin_call (r, call, src))
- ;
- else if (gimple_stmt_nonnegative_warnv_p (call, &strict_overflow_p))
- r.set (build_int_cst (type, 0), TYPE_MAX_VALUE (type));
- else if (gimple_call_nonnull_result_p (call)
- || gimple_call_nonnull_arg (call))
- r = range_nonzero (type);
- else
- r.set_varying (type);
-
- // If there is an LHS, intersect that with what is known.
- if (lhs)
- {
- value_range def;
- def = gimple_range_global (lhs);
- r.intersect (def);
- }
- return true;
-}
-
-// Return the range of a __builtin_ubsan* in CALL and set it in R.
-// CODE is the type of ubsan call (PLUS_EXPR, MINUS_EXPR or
-// MULT_EXPR).
-
-void
-fold_using_range::range_of_builtin_ubsan_call (irange &r, gcall *call,
- tree_code code, fur_source &src)
-{
- gcc_checking_assert (code == PLUS_EXPR || code == MINUS_EXPR
- || code == MULT_EXPR);
- tree type = gimple_call_return_type (call);
- range_operator *op = range_op_handler (code, type);
- gcc_checking_assert (op);
- int_range_max ir0, ir1;
- tree arg0 = gimple_call_arg (call, 0);
- tree arg1 = gimple_call_arg (call, 1);
- src.get_operand (ir0, arg0);
- src.get_operand (ir1, arg1);
-
- bool saved_flag_wrapv = flag_wrapv;
- // Pretend the arithmetic is wrapping. If there is any overflow,
- // we'll complain, but will actually do wrapping operation.
- flag_wrapv = 1;
- op->fold_range (r, type, ir0, ir1);
- flag_wrapv = saved_flag_wrapv;
-
- // If for both arguments vrp_valueize returned non-NULL, this should
- // have been already folded and if not, it wasn't folded because of
- // overflow. Avoid removing the UBSAN_CHECK_* calls in that case.
- if (r.singleton_p ())
- r.set_varying (type);
-}
-
-// For a builtin in CALL, return a range in R if known and return
-// TRUE. Otherwise return FALSE.
-
-bool
-fold_using_range::range_of_builtin_call (irange &r, gcall *call,
- fur_source &src)
-{
- combined_fn func = gimple_call_combined_fn (call);
- if (func == CFN_LAST)
- return false;
-
- tree type = gimple_call_return_type (call);
- tree arg;
- int mini, maxi, zerov = 0, prec;
- scalar_int_mode mode;
-
- switch (func)
- {
- case CFN_BUILT_IN_CONSTANT_P:
- if (cfun->after_inlining)
- {
- r.set_zero (type);
- // r.equiv_clear ();
- return true;
- }
- arg = gimple_call_arg (call, 0);
- if (src.get_operand (r, arg) && r.singleton_p ())
- {
- r.set (build_one_cst (type), build_one_cst (type));
- return true;
- }
- break;
-
- CASE_CFN_FFS:
- CASE_CFN_POPCOUNT:
- // __builtin_ffs* and __builtin_popcount* return [0, prec].
- arg = gimple_call_arg (call, 0);
- prec = TYPE_PRECISION (TREE_TYPE (arg));
- mini = 0;
- maxi = prec;
- src.get_operand (r, arg);
- // If arg is non-zero, then ffs or popcount are non-zero.
- if (!range_includes_zero_p (&r))
- mini = 1;
- // If some high bits are known to be zero, decrease the maximum.
- if (!r.undefined_p ())
- {
- if (TYPE_SIGN (r.type ()) == SIGNED)
- range_cast (r, unsigned_type_for (r.type ()));
- wide_int max = r.upper_bound ();
- maxi = wi::floor_log2 (max) + 1;
- }
- r.set (build_int_cst (type, mini), build_int_cst (type, maxi));
- return true;
-
- CASE_CFN_PARITY:
- r.set (build_zero_cst (type), build_one_cst (type));
- return true;
-
- CASE_CFN_CLZ:
- // __builtin_c[lt]z* return [0, prec-1], except when the
- // argument is 0, but that is undefined behavior.
- //
- // For __builtin_c[lt]z* consider argument of 0 always undefined
- // behavior, for internal fns depending on C?Z_DEFINED_VALUE_AT_ZERO.
- arg = gimple_call_arg (call, 0);
- prec = TYPE_PRECISION (TREE_TYPE (arg));
- mini = 0;
- maxi = prec - 1;
- mode = SCALAR_INT_TYPE_MODE (TREE_TYPE (arg));
- if (gimple_call_internal_p (call))
- {
- if (optab_handler (clz_optab, mode) != CODE_FOR_nothing
- && CLZ_DEFINED_VALUE_AT_ZERO (mode, zerov) == 2)
- {
- // Only handle the single common value.
- if (zerov == prec)
- maxi = prec;
- else
- // Magic value to give up, unless we can prove arg is non-zero.
- mini = -2;
- }
- }
-
- src.get_operand (r, arg);
- // From clz of minimum we can compute result maximum.
- if (!r.undefined_p ())
- {
- // From clz of minimum we can compute result maximum.
- if (wi::gt_p (r.lower_bound (), 0, TYPE_SIGN (r.type ())))
- {
- maxi = prec - 1 - wi::floor_log2 (r.lower_bound ());
- if (mini == -2)
- mini = 0;
- }
- else if (!range_includes_zero_p (&r))
- {
- mini = 0;
- maxi = prec - 1;
- }
- if (mini == -2)
- break;
- // From clz of maximum we can compute result minimum.
- wide_int max = r.upper_bound ();
- int newmini = prec - 1 - wi::floor_log2 (max);
- if (max == 0)
- {
- // If CLZ_DEFINED_VALUE_AT_ZERO is 2 with VALUE of prec,
- // return [prec, prec], otherwise ignore the range.
- if (maxi == prec)
- mini = prec;
- }
- else
- mini = newmini;
- }
- if (mini == -2)
- break;
- r.set (build_int_cst (type, mini), build_int_cst (type, maxi));
- return true;
-
- CASE_CFN_CTZ:
- // __builtin_ctz* return [0, prec-1], except for when the
- // argument is 0, but that is undefined behavior.
- //
- // For __builtin_ctz* consider argument of 0 always undefined
- // behavior, for internal fns depending on CTZ_DEFINED_VALUE_AT_ZERO.
- arg = gimple_call_arg (call, 0);
- prec = TYPE_PRECISION (TREE_TYPE (arg));
- mini = 0;
- maxi = prec - 1;
- mode = SCALAR_INT_TYPE_MODE (TREE_TYPE (arg));
- if (gimple_call_internal_p (call))
- {
- if (optab_handler (ctz_optab, mode) != CODE_FOR_nothing
- && CTZ_DEFINED_VALUE_AT_ZERO (mode, zerov) == 2)
- {
- // Handle only the two common values.
- if (zerov == -1)
- mini = -1;
- else if (zerov == prec)
- maxi = prec;
- else
- // Magic value to give up, unless we can prove arg is non-zero.
- mini = -2;
- }
- }
- src.get_operand (r, arg);
- if (!r.undefined_p ())
- {
- // If arg is non-zero, then use [0, prec - 1].
- if (!range_includes_zero_p (&r))
- {
- mini = 0;
- maxi = prec - 1;
- }
- // If some high bits are known to be zero, we can decrease
- // the maximum.
- wide_int max = r.upper_bound ();
- if (max == 0)
- {
- // Argument is [0, 0]. If CTZ_DEFINED_VALUE_AT_ZERO
- // is 2 with value -1 or prec, return [-1, -1] or [prec, prec].
- // Otherwise ignore the range.
- if (mini == -1)
- maxi = -1;
- else if (maxi == prec)
- mini = prec;
- }
- // If value at zero is prec and 0 is in the range, we can't lower
- // the upper bound. We could create two separate ranges though,
- // [0,floor_log2(max)][prec,prec] though.
- else if (maxi != prec)
- maxi = wi::floor_log2 (max);
- }
- if (mini == -2)
- break;
- r.set (build_int_cst (type, mini), build_int_cst (type, maxi));
- return true;
-
- CASE_CFN_CLRSB:
- arg = gimple_call_arg (call, 0);
- prec = TYPE_PRECISION (TREE_TYPE (arg));
- r.set (build_int_cst (type, 0), build_int_cst (type, prec - 1));
- return true;
- case CFN_UBSAN_CHECK_ADD:
- range_of_builtin_ubsan_call (r, call, PLUS_EXPR, src);
- return true;
- case CFN_UBSAN_CHECK_SUB:
- range_of_builtin_ubsan_call (r, call, MINUS_EXPR, src);
- return true;
- case CFN_UBSAN_CHECK_MUL:
- range_of_builtin_ubsan_call (r, call, MULT_EXPR, src);
- return true;
-
- case CFN_GOACC_DIM_SIZE:
- case CFN_GOACC_DIM_POS:
- // Optimizing these two internal functions helps the loop
- // optimizer eliminate outer comparisons. Size is [1,N]
- // and pos is [0,N-1].
- {
- bool is_pos = func == CFN_GOACC_DIM_POS;
- int axis = oacc_get_ifn_dim_arg (call);
- int size = oacc_get_fn_dim_size (current_function_decl, axis);
- if (!size)
- // If it's dynamic, the backend might know a hardware limitation.
- size = targetm.goacc.dim_limit (axis);
-
- r.set (build_int_cst (type, is_pos ? 0 : 1),
- size
- ? build_int_cst (type, size - is_pos) : vrp_val_max (type));
- return true;
- }
-
- case CFN_BUILT_IN_STRLEN:
- if (tree lhs = gimple_call_lhs (call))
- if (ptrdiff_type_node
- && (TYPE_PRECISION (ptrdiff_type_node)
- == TYPE_PRECISION (TREE_TYPE (lhs))))
- {
- tree type = TREE_TYPE (lhs);
- tree max = vrp_val_max (ptrdiff_type_node);
- wide_int wmax
- = wi::to_wide (max, TYPE_PRECISION (TREE_TYPE (max)));
- tree range_min = build_zero_cst (type);
- // To account for the terminating NULL, the maximum length
- // is one less than the maximum array size, which in turn
- // is one less than PTRDIFF_MAX (or SIZE_MAX where it's
- // smaller than the former type).
- // FIXME: Use max_object_size() - 1 here.
- tree range_max = wide_int_to_tree (type, wmax - 2);
- r.set (range_min, range_max);
- return true;
- }
- break;
- default:
- break;
- }
- return false;
-}
-
-
-// Calculate a range for COND_EXPR statement S and return it in R.
-// If a range cannot be calculated, return false.
+#include "cfgloop.h"
+#include "tree-scalar-evolution.h"
+#include "gimple-range.h"
-bool
-fold_using_range::range_of_cond_expr (irange &r, gassign *s, fur_source &src)
+gimple_ranger::gimple_ranger () : tracer ("")
{
- int_range_max cond_range, range1, range2;
- tree cond = gimple_assign_rhs1 (s);
- tree op1 = gimple_assign_rhs2 (s);
- tree op2 = gimple_assign_rhs3 (s);
-
- gcc_checking_assert (gimple_assign_rhs_code (s) == COND_EXPR);
- gcc_checking_assert (useless_type_conversion_p (TREE_TYPE (op1),
- TREE_TYPE (op2)));
- if (!irange::supports_type_p (TREE_TYPE (op1)))
- return false;
-
- src.get_operand (cond_range, cond);
- src.get_operand (range1, op1);
- src.get_operand (range2, op2);
-
- // If the condition is known, choose the appropriate expression.
- if (cond_range.singleton_p ())
- {
- // False, pick second operand.
- if (cond_range.zero_p ())
- r = range2;
- else
- r = range1;
- }
- else
- {
- r = range1;
- r.union_ (range2);
- }
- return true;
+ // If the cache has a relation oracle, use it.
+ m_oracle = m_cache.oracle ();
+ if (dump_file && (param_evrp_mode & EVRP_MODE_TRACE))
+ tracer.enable_trace ();
}
bool
gimple_ranger::range_of_expr (irange &r, tree expr, gimple *stmt)
{
+ unsigned idx;
if (!gimple_range_ssa_p (expr))
return get_tree_range (r, expr, stmt);
+ if ((idx = tracer.header ("range_of_expr(")))
+ {
+ print_generic_expr (dump_file, expr, TDF_SLIM);
+ fputs (")", dump_file);
+ if (stmt)
+ {
+ fputs (" at stmt ", dump_file);
+ print_gimple_stmt (dump_file, stmt, 0, TDF_SLIM);
+ }
+ else
+ fputs ("\n", dump_file);
+ }
+
// If there is no statement, just get the global value.
if (!stmt)
{
if (!m_cache.get_global_range (r, expr))
r = gimple_range_global (expr);
- return true;
}
-
// For a debug stmt, pick the best value currently available, do not
// trigger new value calculations. PR 100781.
- if (is_gimple_debug (stmt))
+ else if (is_gimple_debug (stmt))
+ m_cache.range_of_expr (r, expr, stmt);
+ else
{
- bool state = m_cache.enable_new_values (false);
- m_cache.range_of_expr (r, expr, stmt);
- m_cache.enable_new_values (state);
- return true;
- }
- basic_block bb = gimple_bb (stmt);
- gimple *def_stmt = SSA_NAME_DEF_STMT (expr);
+ basic_block bb = gimple_bb (stmt);
+ gimple *def_stmt = SSA_NAME_DEF_STMT (expr);
- // If name is defined in this block, try to get an range from S.
- if (def_stmt && gimple_bb (def_stmt) == bb)
- {
- range_of_stmt (r, def_stmt, expr);
- if (!cfun->can_throw_non_call_exceptions && r.varying_p () &&
- m_cache.m_non_null.non_null_deref_p (expr, bb))
- r = range_nonzero (TREE_TYPE (expr));
+ // If name is defined in this block, try to get an range from S.
+ if (def_stmt && gimple_bb (def_stmt) == bb)
+ {
+ range_of_stmt (r, def_stmt, expr);
+ m_cache.m_non_null.adjust_range (r, expr, bb, true);
+ }
+ // Otherwise OP comes from outside this block, use range on entry.
+ else
+ range_on_entry (r, bb, expr);
}
- else
- // Otherwise OP comes from outside this block, use range on entry.
- range_on_entry (r, bb, expr);
-
+ if (idx)
+ tracer.trailer (idx, "range_of_expr", true, expr, r);
return true;
}
int_range_max entry_range;
gcc_checking_assert (gimple_range_ssa_p (name));
+ unsigned idx;
+ if ((idx = tracer.header ("range_on_entry (")))
+ {
+ print_generic_expr (dump_file, name, TDF_SLIM);
+ fprintf (dump_file, ") to BB %d\n", bb->index);
+ }
+
// Start with any known range
range_of_stmt (r, SSA_NAME_DEF_STMT (name), name);
if (m_cache.block_range (entry_range, bb, name))
r.intersect (entry_range);
- if (!cfun->can_throw_non_call_exceptions && r.varying_p () &&
- m_cache.m_non_null.non_null_deref_p (name, bb))
- r = range_nonzero (TREE_TYPE (name));
+ m_cache.m_non_null.adjust_range (r, name, bb, true);
+
+ if (idx)
+ tracer.trailer (idx, "range_on_entry", true, name, r);
}
// Calculate the range for NAME at the end of block BB and return it in R.
gcc_checking_assert (bb != EXIT_BLOCK_PTR_FOR_FN (cfun));
gcc_checking_assert (gimple_range_ssa_p (name));
+ unsigned idx;
+ if ((idx = tracer.header ("range_on_exit (")))
+ {
+ print_generic_expr (dump_file, name, TDF_SLIM);
+ fprintf (dump_file, ") from BB %d\n", bb->index);
+ }
+
gimple *s = SSA_NAME_DEF_STMT (name);
basic_block def_bb = gimple_bb (s);
// If this is not the definition block, get the range on the last stmt in
range_on_entry (r, bb, name);
gcc_checking_assert (r.undefined_p ()
|| range_compatible_p (r.type (), TREE_TYPE (name)));
+
+ if (idx)
+ tracer.trailer (idx, "range_on_exit", true, name, r);
}
// Calculate a range for NAME on edge E and return it in R.
if (!gimple_range_ssa_p (name))
return range_of_expr (r, name);
+ unsigned idx;
+ if ((idx = tracer.header ("range_on_edge (")))
+ {
+ print_generic_expr (dump_file, name, TDF_SLIM);
+ fprintf (dump_file, ") on edge %d->%d\n", e->src->index, e->dest->index);
+ }
+
range_on_exit (r, e->src, name);
gcc_checking_assert (r.undefined_p ()
|| range_compatible_p (r.type(), TREE_TYPE (name)));
if (m_cache.range_on_edge (edge_range, e, name))
r.intersect (edge_range);
+ if (idx)
+ tracer.trailer (idx, "range_on_edge", true, name, r);
return true;
}
bool
gimple_ranger::range_of_stmt (irange &r, gimple *s, tree name)
{
+ bool res;
r.set_undefined ();
+ unsigned idx;
+ if ((idx = tracer.header ("range_of_stmt (")))
+ {
+ if (name)
+ print_generic_expr (dump_file, name, TDF_SLIM);
+ fputs (") at stmt ", dump_file);
+ print_gimple_stmt (dump_file, s, 0, TDF_SLIM);
+ }
+
if (!name)
name = gimple_get_lhs (s);
// If no name, simply call the base routine.
if (!name)
- return fold_range_internal (r, s, NULL_TREE);
-
- if (!gimple_range_ssa_p (name))
- return false;
-
+ res = fold_range_internal (r, s, NULL_TREE);
+ else if (!gimple_range_ssa_p (name))
+ res = false;
// Check if the stmt has already been processed, and is not stale.
- if (m_cache.get_non_stale_global_range (r, name))
- return true;
-
- // Otherwise calculate a new value.
- int_range_max tmp;
- fold_range_internal (tmp, s, name);
+ else if (m_cache.get_non_stale_global_range (r, name))
+ {
+ if (idx)
+ tracer.trailer (idx, " cached", true, name, r);
+ return true;
+ }
+ else
+ {
+ // Otherwise calculate a new value.
+ int_range_max tmp;
+ fold_range_internal (tmp, s, name);
- // Combine the new value with the old value. This is required because
- // the way value propagation works, when the IL changes on the fly we
- // can sometimes get different results. See PR 97741.
- r.intersect (tmp);
- m_cache.set_global_range (name, r);
+ // Combine the new value with the old value. This is required because
+ // the way value propagation works, when the IL changes on the fly we
+ // can sometimes get different results. See PR 97741.
+ r.intersect (tmp);
+ m_cache.set_global_range (name, r);
+ res = true;
+ }
- return true;
+ if (idx)
+ tracer.trailer (idx, "range_of_stmt", res, name, r);
+ return res;
}
// This routine will export whatever global ranges are known to GCC
void
gimple_ranger::export_global_ranges ()
{
- unsigned x;
- int_range_max r;
- if (dump_file)
- {
- fprintf (dump_file, "Exported global range table\n");
- fprintf (dump_file, "===========================\n");
- }
-
- for ( x = 1; x < num_ssa_names; x++)
+ /* Cleared after the table header has been printed. */
+ bool print_header = true;
+ for (unsigned x = 1; x < num_ssa_names; x++)
{
+ int_range_max r;
tree name = ssa_name (x);
if (name && !SSA_NAME_IN_FREE_LIST (name)
&& gimple_range_ssa_p (name)
&& !r.varying_p())
{
bool updated = update_global_range (r, name);
+ if (!updated || !dump_file || !(dump_flags & TDF_DETAILS))
+ continue;
+
+ if (print_header)
+ {
+ /* Print the header only when there's something else
+ to print below. */
+ fprintf (dump_file, "Exported global range table:\n");
+ fprintf (dump_file, "============================\n");
+ print_header = false;
+ }
- if (updated && dump_file)
+ value_range vr = r;
+ print_generic_expr (dump_file, name , TDF_SLIM);
+ fprintf (dump_file, " : ");
+ vr.dump (dump_file);
+ fprintf (dump_file, "\n");
+ int_range_max same = vr;
+ if (same != r)
{
- value_range vr = r;
- print_generic_expr (dump_file, name , TDF_SLIM);
- fprintf (dump_file, " --> ");
- vr.dump (dump_file);
+ fprintf (dump_file, " irange : ");
+ r.dump (dump_file);
fprintf (dump_file, "\n");
- int_range_max same = vr;
- if (same != r)
- {
- fprintf (dump_file, " irange : ");
- r.dump (dump_file);
- fprintf (dump_file, "\n");
- }
}
}
}
unsigned x;
edge_iterator ei;
edge e;
- int_range_max range;
+ int_range_max range, tmp_range;
fprintf (f, "\n=========== BB %d ============\n", bb->index);
m_cache.dump_bb (f, bb);
// the on entry cache for either end of the edge is
// set.
if ((s && bb == gimple_bb (s)) ||
- m_cache.block_range (range, bb, name, false) ||
- m_cache.block_range (range, e->dest, name, false))
+ m_cache.block_range (tmp_range, bb, name, false) ||
+ m_cache.block_range (tmp_range, e->dest, name, false))
{
- range_on_edge (range, e, name);
if (!range.varying_p ())
{
fprintf (f, "%d->%d ", e->src->index,
m_cache.dump (f);
}
-// If SCEV has any information about phi node NAME, return it as a range in R.
-
-void
-fold_using_range::range_of_ssa_name_with_loop_info (irange &r, tree name,
- class loop *l, gphi *phi,
- fur_source &src)
-{
- gcc_checking_assert (TREE_CODE (name) == SSA_NAME);
- tree min, max, type = TREE_TYPE (name);
- if (bounds_of_var_in_loop (&min, &max, src.query (), l, phi, name))
- {
- if (TREE_CODE (min) != INTEGER_CST)
- {
- if (src.query ()->range_of_expr (r, min, phi) && !r.undefined_p ())
- min = wide_int_to_tree (type, r.lower_bound ());
- else
- min = vrp_val_min (type);
- }
- if (TREE_CODE (max) != INTEGER_CST)
- {
- if (src.query ()->range_of_expr (r, max, phi) && !r.undefined_p ())
- max = wide_int_to_tree (type, r.upper_bound ());
- else
- max = vrp_val_max (type);
- }
- r.set (min, max);
- }
- else
- r.set_varying (type);
-}
-
-// --------------------------------------------------------------------------
-// trace_ranger implementation.
-
-
-trace_ranger::trace_ranger ()
-{
- indent = 0;
- trace_count = 0;
-}
-
-// If dumping, return true and print the prefix for the next output line.
-
-bool
-trace_ranger::dumping (unsigned counter, bool trailing)
-{
- if (dump_file && (dump_flags & TDF_DETAILS))
- {
- // Print counter index as well as INDENT spaces.
- if (!trailing)
- fprintf (dump_file, " %-7u ", counter);
- else
- fprintf (dump_file, " ");
- unsigned x;
- for (x = 0; x< indent; x++)
- fputc (' ', dump_file);
- return true;
- }
- return false;
-}
-
-// After calling a routine, if dumping, print the CALLER, NAME, and RESULT,
-// returning RESULT.
-
-bool
-trace_ranger::trailer (unsigned counter, const char *caller, bool result,
- tree name, const irange &r)
-{
- if (dumping (counter, true))
- {
- indent -= bump;
- fputs(result ? "TRUE : " : "FALSE : ", dump_file);
- fprintf (dump_file, "(%u) ", counter);
- fputs (caller, dump_file);
- fputs (" (",dump_file);
- if (name)
- print_generic_expr (dump_file, name, TDF_SLIM);
- fputs (") ",dump_file);
- if (result)
- {
- r.dump (dump_file);
- fputc('\n', dump_file);
- }
- else
- fputc('\n', dump_file);
- // Marks the end of a request.
- if (indent == 0)
- fputc('\n', dump_file);
- }
- return result;
-}
-
-// Tracing version of range_on_edge. Call it with printing wrappers.
-
-bool
-trace_ranger::range_on_edge (irange &r, edge e, tree name)
-{
- unsigned idx = ++trace_count;
- if (dumping (idx))
- {
- fprintf (dump_file, "range_on_edge (");
- print_generic_expr (dump_file, name, TDF_SLIM);
- fprintf (dump_file, ") on edge %d->%d\n", e->src->index, e->dest->index);
- indent += bump;
- }
-
- bool res = gimple_ranger::range_on_edge (r, e, name);
- trailer (idx, "range_on_edge", true, name, r);
- return res;
-}
-
-// Tracing version of range_on_entry. Call it with printing wrappers.
-
-void
-trace_ranger::range_on_entry (irange &r, basic_block bb, tree name)
-{
- unsigned idx = ++trace_count;
- if (dumping (idx))
- {
- fprintf (dump_file, "range_on_entry (");
- print_generic_expr (dump_file, name, TDF_SLIM);
- fprintf (dump_file, ") to BB %d\n", bb->index);
- indent += bump;
- }
-
- gimple_ranger::range_on_entry (r, bb, name);
-
- trailer (idx, "range_on_entry", true, name, r);
-}
-
-// Tracing version of range_on_exit. Call it with printing wrappers.
-
-void
-trace_ranger::range_on_exit (irange &r, basic_block bb, tree name)
-{
- unsigned idx = ++trace_count;
- if (dumping (idx))
- {
- fprintf (dump_file, "range_on_exit (");
- print_generic_expr (dump_file, name, TDF_SLIM);
- fprintf (dump_file, ") from BB %d\n", bb->index);
- indent += bump;
- }
-
- gimple_ranger::range_on_exit (r, bb, name);
-
- trailer (idx, "range_on_exit", true, name, r);
-}
-
-// Tracing version of range_of_stmt. Call it with printing wrappers.
-
-bool
-trace_ranger::range_of_stmt (irange &r, gimple *s, tree name)
-{
- bool res;
- unsigned idx = ++trace_count;
- if (dumping (idx))
- {
- fprintf (dump_file, "range_of_stmt (");
- if (name)
- print_generic_expr (dump_file, name, TDF_SLIM);
- fputs (") at stmt ", dump_file);
- print_gimple_stmt (dump_file, s, 0, TDF_SLIM);
- indent += bump;
- }
-
- res = gimple_ranger::range_of_stmt (r, s, name);
-
- return trailer (idx, "range_of_stmt", res, name, r);
-}
-
-// Tracing version of range_of_expr. Call it with printing wrappers.
-
-bool
-trace_ranger::range_of_expr (irange &r, tree name, gimple *s)
-{
- bool res;
- unsigned idx = ++trace_count;
- if (dumping (idx))
- {
- fprintf (dump_file, "range_of_expr(");
- print_generic_expr (dump_file, name, TDF_SLIM);
- fputs (")", dump_file);
- if (s)
- {
- fputs (" at stmt ", dump_file);
- print_gimple_stmt (dump_file, s, 0, TDF_SLIM);
- }
- else
- fputs ("\n", dump_file);
- indent += bump;
- }
-
- res = gimple_ranger::range_of_expr (r, name, s);
-
- return trailer (idx, "range_of_expr", res, name, r);
-}
+/* Create a new ranger instance and associate it with function FUN.
+ Each call must be paired with a call to disable_ranger to release
+ resources. */
gimple_ranger *
enable_ranger (struct function *fun)
{
gimple_ranger *r;
- if (param_evrp_mode & EVRP_MODE_TRACE)
- r = new trace_ranger;
- else
- r = new gimple_ranger;
-
+ r = new gimple_ranger;
fun->x_range_query = r;
return r;
}
+/* Destroy and release the ranger instance associated with function FUN
+ and replace it the global ranger. */
+
void
disable_ranger (struct function *fun)
{
fun->x_range_query = &global_ranges;
}
-
-// =========================================
-// Debugging helpers.
-// =========================================
-
-// Query all statements in the IL to precalculate computable ranges in RANGER.
-
-static DEBUG_FUNCTION void
-debug_seed_ranger (gimple_ranger &ranger)
-{
- // Recalculate SCEV to make sure the dump lists everything.
- if (scev_initialized_p ())
- {
- scev_finalize ();
- scev_initialize ();
- }
-
- basic_block bb;
- int_range_max r;
- gimple_stmt_iterator gsi;
- FOR_EACH_BB_FN (bb, cfun)
- for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi); gsi_next (&gsi))
- {
- gimple *stmt = gsi_stmt (gsi);
-
- if (is_gimple_debug (stmt))
- continue;
-
- ranger.range_of_stmt (r, stmt);
- }
-}
-
-// Dump all that ranger knows for the current function.
-
-DEBUG_FUNCTION void
-dump_ranger (FILE *out)
-{
- gimple_ranger ranger;
- debug_seed_ranger (ranger);
- ranger.dump (out);
-}
-
-DEBUG_FUNCTION void
-debug_ranger ()
-{
- dump_ranger (stderr);
-}
-
-// Dump all that ranger knows on a path of BBs.
-//
-// Note that the blocks are in reverse order, thus the exit block is
-// path[0].
-
-DEBUG_FUNCTION void
-dump_ranger (FILE *dump_file, const vec<basic_block> &path)
-{
- if (path.length () == 0)
- {
- fprintf (dump_file, "empty\n");
- return;
- }
-
- gimple_ranger ranger;
- debug_seed_ranger (ranger);
-
- unsigned i = path.length ();
- do
- {
- i--;
- ranger.dump_bb (dump_file, path[i]);
- }
- while (i > 0);
-}
-
-DEBUG_FUNCTION void
-debug_ranger (const vec<basic_block> &path)
-{
- dump_ranger (stderr, path);
-}
-
-#include "gimple-range-tests.cc"
projects / thirdparty / gcc.git / blobdiff