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

[pf3gnuchains/gcc-fork.git] / gcc / builtins.c

diff --git a/gcc/builtins.c b/gcc/builtins.c
index e0cf55e..c4200c2 100644 (file)
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -275,14 +275,28 @@ get_pointer_alignment (tree exp, unsigned int max_align)
        case ADDR_EXPR:
          /* See what we are pointing at and look at its alignment.  */
          exp = TREE_OPERAND (exp, 0);
+         inner = max_align;
+         while (handled_component_p (exp))
+           {
+             /* Fields in a structure can be packed, honour DECL_ALIGN
+                of the FIELD_DECL.  For all other references the conservative 
+                alignment is the element type alignment.  */
+             if (TREE_CODE (exp) == COMPONENT_REF)
+               inner = MIN (inner, DECL_ALIGN (TREE_OPERAND (exp, 1)));
+             else
+               inner = MIN (inner, TYPE_ALIGN (TREE_TYPE (exp)));
+             exp = TREE_OPERAND (exp, 0);
+           }
          if (TREE_CODE (exp) == FUNCTION_DECL)
            align = FUNCTION_BOUNDARY;
          else if (DECL_P (exp))
-           align = DECL_ALIGN (exp);
+           align = MIN (inner, DECL_ALIGN (exp));
 #ifdef CONSTANT_ALIGNMENT
          else if (CONSTANT_CLASS_P (exp))
-           align = CONSTANT_ALIGNMENT (exp, align);
+           align = MIN (inner, (unsigned)CONSTANT_ALIGNMENT (exp, align));
 #endif
+         else
+           align = MIN (align, inner);
          return MIN (align, max_align);
 
        default:
@@ -498,7 +512,7 @@ expand_builtin_return_addr (enum built_in_function fndecl_code, int count)
 
   /* For a zero count, we don't care what frame address we return, so frame
      pointer elimination is OK, and using the soft frame pointer is OK.
-     For a non-zero count, we require a stable offset from the current frame
+     For a nonzero count, we require a stable offset from the current frame
      pointer to the previous one, so we must use the hard frame pointer, and
      we must disable frame pointer elimination.  */
   if (count == 0)
@@ -5367,6 +5381,8 @@ expand_builtin_fork_or_exec (tree fn, tree arglist, rtx target, int ignore)
   TREE_PUBLIC (decl) = 1;
   DECL_ARTIFICIAL (decl) = 1;
   TREE_NOTHROW (decl) = 1;
+  DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
+  DECL_VISIBILITY_SPECIFIED (decl) = 1;
   call = build_function_call_expr (decl, arglist);
 
   return expand_call (call, target, ignore);
@@ -8208,9 +8224,9 @@ fold_builtin_copysign (tree fndecl, tree arglist, tree type)
 
       c1 = TREE_REAL_CST (arg1);
       c2 = TREE_REAL_CST (arg2);
+      /* c1.sign := c2.sign.  */
       real_copysign (&c1, &c2);
       return build_real (type, c1);
-      c1.sign = c2.sign;
     }
 
   /* copysign(X, Y) is fabs(X) when Y is always non-negative.