* stor-layout.c (mode_for_size_tree): Remove restiction on type

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-structalias.c

diff --git a/gcc/tree-ssa-structalias.c b/gcc/tree-ssa-structalias.c
index a9032a3..990398c 100644 (file)
--- a/gcc/tree-ssa-structalias.c
+++ b/gcc/tree-ssa-structalias.c
@@ -3182,7 +3182,8 @@ handle_ptr_arith (VEC (ce_s, heap) *lhsc, tree expr)
   VEC (ce_s, heap) *temp = NULL;
   unsigned int rhsoffset = 0;
 
-  if (TREE_CODE (expr) != PLUS_EXPR)
+  if (TREE_CODE (expr) != PLUS_EXPR
+      && TREE_CODE (expr) != MINUS_EXPR)
     return false;
 
   op0 = TREE_OPERAND (expr, 0);
@@ -3190,7 +3191,8 @@ handle_ptr_arith (VEC (ce_s, heap) *lhsc, tree expr)
 
   get_constraint_for (op0, &temp);
   if (POINTER_TYPE_P (TREE_TYPE (op0))
-      && TREE_CODE (op1) == INTEGER_CST)
+      && TREE_CODE (op1) == INTEGER_CST
+      && TREE_CODE (expr) == PLUS_EXPR)
     {
       rhsoffset = TREE_INT_CST_LOW (op1) * BITS_PER_UNIT;
     }
@@ -4039,7 +4041,7 @@ intra_create_variable_infos (void)
   tree t;
 
   /* For each incoming argument arg, ARG = &ANYTHING or a dummy variable if
-     flag_argument_noalias > 1. */
+     flag_argument_noalias > 2. */
   for (t = DECL_ARGUMENTS (current_function_decl); t; t = TREE_CHAIN (t))
     {
       struct constraint_expr lhs;
@@ -4049,11 +4051,11 @@ intra_create_variable_infos (void)
       lhs.type = SCALAR;
       lhs.var  = create_variable_info_for (t, alias_get_name (t));
 
-      /* With flag_argument_noalias greater than one means that the incoming
+      /* With flag_argument_noalias greater than two means that the incoming
          argument cannot alias anything except for itself so create a HEAP
          variable.  */
       if (POINTER_TYPE_P (TREE_TYPE (t))
-         && flag_argument_noalias > 1)
+         && flag_argument_noalias > 2)
        {
          varinfo_t vi;
          struct constraint_expr rhs;