* collect2.c (main): Remove SWITCHES_NEED_SPACES conditional.

[pf3gnuchains/gcc-fork.git] / gcc / tree-vrp.c

diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index 83ff665..efeb474 100644 (file)
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -31,7 +31,8 @@ along with GCC; see the file COPYING3.  If not see
 #include "tree-pass.h"
 #include "tree-dump.h"
 #include "timevar.h"
-#include "diagnostic.h"
+#include "tree-pretty-print.h"
+#include "gimple-pretty-print.h"
 #include "toplev.h"
 #include "intl.h"
 #include "cfgloop.h"
@@ -864,6 +865,8 @@ gimple_assign_nonnegative_warnv_p (gimple stmt, bool *strict_overflow_p)
                                              gimple_assign_rhs1 (stmt),
                                              gimple_assign_rhs2 (stmt),
                                              strict_overflow_p);
+    case GIMPLE_TERNARY_RHS:
+      return false;
     case GIMPLE_SINGLE_RHS:
       return tree_single_nonnegative_warnv_p (gimple_assign_rhs1 (stmt),
                                              strict_overflow_p);
@@ -935,6 +938,8 @@ gimple_assign_nonzero_warnv_p (gimple stmt, bool *strict_overflow_p)
                                          gimple_assign_rhs1 (stmt),
                                          gimple_assign_rhs2 (stmt),
                                          strict_overflow_p);
+    case GIMPLE_TERNARY_RHS:
+      return false;
     case GIMPLE_SINGLE_RHS:
       return tree_single_nonzero_warnv_p (gimple_assign_rhs1 (stmt),
                                          strict_overflow_p);
@@ -2084,9 +2089,6 @@ extract_range_from_binary_expr (value_range_t *vr,
       && code != EXACT_DIV_EXPR
       && code != ROUND_DIV_EXPR
       && code != TRUNC_MOD_EXPR
-      && code != FLOOR_MOD_EXPR
-      && code != CEIL_MOD_EXPR
-      && code != ROUND_MOD_EXPR
       && code != RSHIFT_EXPR
       && code != MIN_EXPR
       && code != MAX_EXPR
@@ -2156,9 +2158,6 @@ extract_range_from_binary_expr (value_range_t *vr,
       && code != EXACT_DIV_EXPR
       && code != ROUND_DIV_EXPR
       && code != TRUNC_MOD_EXPR
-      && code != FLOOR_MOD_EXPR
-      && code != CEIL_MOD_EXPR
-      && code != ROUND_MOD_EXPR
       && (vr0.type == VR_VARYING
          || vr1.type == VR_VARYING
          || vr0.type != vr1.type
@@ -2509,27 +2508,30 @@ extract_range_from_binary_expr (value_range_t *vr,
            }
        }
     }
-  else if (code == TRUNC_MOD_EXPR
-          || code == FLOOR_MOD_EXPR
-          || code == CEIL_MOD_EXPR
-          || code == ROUND_MOD_EXPR)
+  else if (code == TRUNC_MOD_EXPR)
     {
       bool sop = false;
-      if (vr0.type == VR_ANTI_RANGE
-         || vr1.type != VR_RANGE
+      if (vr1.type != VR_RANGE
          || symbolic_range_p (&vr1)
-         || range_includes_zero_p (&vr1))
+         || range_includes_zero_p (&vr1)
+         || vrp_val_is_min (vr1.min))
        {
          set_value_range_to_varying (vr);
          return;
        }
       type = VR_RANGE;
-      max = int_const_binop (MINUS_EXPR, vr1.max, integer_one_node, 0);
-      if (vrp_expr_computes_nonnegative (op0, &sop)
-         && vrp_expr_computes_nonnegative (op1, &sop) && !sop)
-       min = build_int_cst (TREE_TYPE (vr1.max), 0);
+      /* Compute MAX <|vr1.min|, |vr1.max|> - 1.  */
+      max = fold_unary_to_constant (ABS_EXPR, TREE_TYPE (vr1.min), vr1.min);
+      if (tree_int_cst_lt (max, vr1.max))
+       max = vr1.max;
+      max = int_const_binop (MINUS_EXPR, max, integer_one_node, 0);
+      /* If the dividend is non-negative the modulus will be
+        non-negative as well.  */
+      if (TYPE_UNSIGNED (TREE_TYPE (max))
+         || (vrp_expr_computes_nonnegative (op0, &sop) && !sop))
+       min = build_int_cst (TREE_TYPE (max), 0);
       else
-       min = fold_unary (NEGATE_EXPR, TREE_TYPE (max), max);
+       min = fold_unary_to_constant (NEGATE_EXPR, TREE_TYPE (max), max);
     }
   else if (code == MINUS_EXPR)
     {
@@ -3748,7 +3750,7 @@ dump_value_range (FILE *file, value_range_t *vr)
 
 /* Dump value range VR to stderr.  */
 
-void
+DEBUG_FUNCTION void
 debug_value_range (value_range_t *vr)
 {
   dump_value_range (stderr, vr);
@@ -3780,7 +3782,7 @@ dump_all_value_ranges (FILE *file)
 
 /* Dump all value ranges to stderr.  */
 
-void
+DEBUG_FUNCTION void
 debug_all_value_ranges (void)
 {
   dump_all_value_ranges (stderr);
@@ -3936,7 +3938,7 @@ dump_asserts_for (FILE *file, tree name)
 
 /* Dump all the registered assertions for NAME to stderr.  */
 
-void
+DEBUG_FUNCTION void
 debug_asserts_for (tree name)
 {
   dump_asserts_for (stderr, name);
@@ -3960,7 +3962,7 @@ dump_all_asserts (FILE *file)
 
 /* Dump all the registered assertions for all the names to stderr.  */
 
-void
+DEBUG_FUNCTION void
 debug_all_asserts (void)
 {
   dump_all_asserts (stderr);
@@ -7345,7 +7347,7 @@ vrp_finalize (void)
       single_val_range = NULL;
     }
 
-  substitute_and_fold (single_val_range, vrp_fold_stmt);
+  substitute_and_fold (single_val_range, vrp_fold_stmt, false);
 
   if (warn_array_bounds)
     check_all_array_refs ();