PR target/39558

[pf3gnuchains/gcc-fork.git] / gcc / gimple-low.c

diff --git a/gcc/gimple-low.c b/gcc/gimple-low.c
index 197ba35..fecc667 100644 (file)
--- a/gcc/gimple-low.c
+++ b/gcc/gimple-low.c
@@ -1,6 +1,7 @@
 /* GIMPLE lowering pass.  Converts High GIMPLE into Low GIMPLE.
 
-   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -218,6 +219,80 @@ struct gimple_opt_pass pass_lower_cf =
 };
 
 
+/* Verify if the type of the argument matches that of the function
+   declaration.  If we cannot verify this or there is a mismatch,
+   mark the call expression so it doesn't get inlined later.  */
+
+static void
+check_call_args (gimple stmt)
+{
+  tree fndecl, parms, p;
+  unsigned int i, nargs;
+
+  if (gimple_call_cannot_inline_p (stmt))
+    return;
+
+  nargs = gimple_call_num_args (stmt);
+
+  /* Get argument types for verification.  */
+  fndecl = gimple_call_fndecl (stmt);
+  parms = NULL_TREE;
+  if (fndecl)
+    parms = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
+  else if (POINTER_TYPE_P (TREE_TYPE (gimple_call_fn (stmt))))
+    parms = TYPE_ARG_TYPES (TREE_TYPE (TREE_TYPE (gimple_call_fn (stmt))));
+
+  /* Verify if the type of the argument matches that of the function
+     declaration.  If we cannot verify this or there is a mismatch,
+     mark the call expression so it doesn't get inlined later.  */
+  if (fndecl && DECL_ARGUMENTS (fndecl))
+    {
+      for (i = 0, p = DECL_ARGUMENTS (fndecl);
+          i < nargs;
+          i++, p = TREE_CHAIN (p))
+       {
+         /* We cannot distinguish a varargs function from the case
+            of excess parameters, still deferring the inlining decision
+            to the callee is possible.  */
+         if (!p)
+           break;
+         if (p == error_mark_node
+             || gimple_call_arg (stmt, i) == error_mark_node
+             || !fold_convertible_p (DECL_ARG_TYPE (p),
+                                     gimple_call_arg (stmt, i)))
+           {
+             gimple_call_set_cannot_inline (stmt, true);
+             break;
+           }
+       }
+    }
+  else if (parms)
+    {
+      for (i = 0, p = parms; i < nargs; i++, p = TREE_CHAIN (p))
+       {
+         /* If this is a varargs function defer inlining decision
+            to callee.  */
+         if (!p)
+           break;
+         if (TREE_VALUE (p) == error_mark_node
+             || gimple_call_arg (stmt, i) == error_mark_node
+             || TREE_CODE (TREE_VALUE (p)) == VOID_TYPE
+             || !fold_convertible_p (TREE_VALUE (p),
+                                     gimple_call_arg (stmt, i)))
+           {
+             gimple_call_set_cannot_inline (stmt, true);
+             break;
+           }
+       }
+    }
+  else
+    {
+      if (nargs != 0)
+       gimple_call_set_cannot_inline (stmt, true);
+    }
+}
+
+
 /* Lower sequence SEQ.  Unlike gimplification the statements are not relowered
    when they are changed -- if this has to be done, the lowering routine must
    do it explicitly.  DATA is passed through the recursion.  */
@@ -320,6 +395,7 @@ lower_stmt (gimple_stmt_iterator *gsi, struct lower_data *data)
            lower_builtin_setjmp (gsi);
            return;
          }
+       check_call_args (stmt);
       }
       break;