builtins.c (expand_tree_builtin): Move ...

        * builtins.c (expand_tree_builtin): Move ...
        * c-common.c (expand_tree_builtin): ... here.

From-SVN: r31598

1 files changed, 101 insertions, 0 deletions

diff --git a/gcc/c-common.c b/gcc/c-common.c
index 6d91810..f7d670c 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -3960,3 +3960,104 @@ self_promoting_args_p (parms)
     }
   return 1;
 }
+
+/* Recognize certain built-in functions so we can make tree-codes
+   other than CALL_EXPR.  We do this when it enables fold-const.c
+   to do something useful.  */
+/* ??? By rights this should go in builtins.c, but only C and C++
+   implement build_{binary,unary}_op.  Not exactly sure what bits
+   of functionality are actually needed from those functions, or
+   where the similar functionality exists in the other front ends.  */
+
+tree
+expand_tree_builtin (function, params, coerced_params)
+     tree function, params, coerced_params;
+{
+  enum tree_code code;
+
+  if (DECL_BUILT_IN_CLASS (function) != BUILT_IN_NORMAL)
+    return NULL_TREE;
+
+  switch (DECL_FUNCTION_CODE (function))
+    {
+    case BUILT_IN_ABS:
+    case BUILT_IN_LABS:
+    case BUILT_IN_FABS:
+      if (coerced_params == 0)
+	return integer_zero_node;
+      return build_unary_op (ABS_EXPR, TREE_VALUE (coerced_params), 0);
+
+    case BUILT_IN_ISGREATER:
+      if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
+	code = UNLE_EXPR;
+      else
+	code = LE_EXPR;
+      goto unordered_cmp;
+
+    case BUILT_IN_ISGREATEREQUAL:
+      if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
+	code = UNLT_EXPR;
+      else
+	code = LT_EXPR;
+      goto unordered_cmp;
+
+    case BUILT_IN_ISLESS:
+      if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
+	code = UNGE_EXPR;
+      else
+	code = GE_EXPR;
+      goto unordered_cmp;
+
+    case BUILT_IN_ISLESSEQUAL:
+      if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
+	code = UNGT_EXPR;
+      else
+	code = GT_EXPR;
+      goto unordered_cmp;
+
+    case BUILT_IN_ISLESSGREATER:
+      if (TARGET_FLOAT_FORMAT == IEEE_FLOAT_FORMAT)
+	code = UNEQ_EXPR;
+      else
+	code = EQ_EXPR;
+      goto unordered_cmp;
+
+    case BUILT_IN_ISUNORDERED:
+      if (TARGET_FLOAT_FORMAT != IEEE_FLOAT_FORMAT)
+	return integer_zero_node;
+      code = UNORDERED_EXPR;
+      goto unordered_cmp;
+
+    unordered_cmp:
+      {
+	tree arg0, arg1;
+
+	if (params == 0
+	    || TREE_CHAIN (params) == 0)
+	  {
+	    error ("too few arguments to function `%s'",
+		   IDENTIFIER_POINTER (DECL_NAME (function)));
+	    return error_mark_node;
+	  }
+	else if (TREE_CHAIN (TREE_CHAIN (params)) != 0)
+	  {
+	    error ("too many arguments to function `%s'",
+		   IDENTIFIER_POINTER (DECL_NAME (function)));
+	    return error_mark_node;
+	  }
+
+	arg0 = TREE_VALUE (params);
+	arg1 = TREE_VALUE (TREE_CHAIN (params));
+	arg0 = build_binary_op (code, arg0, arg1, 0);
+	if (code != UNORDERED_EXPR)
+	  arg0 = build_unary_op (TRUTH_NOT_EXPR, arg0, 0);
+	return arg0;
+      }
+      break;
+
+    default:
+      break;
+    }
+
+  return NULL_TREE;
+}