Fix minor issues

[pf3gnuchains/gcc-fork.git] / gcc / tree.h

diff --git a/gcc/tree.h b/gcc/tree.h
index 18fdd07..64ccdb0 100644 (file)
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -2967,6 +2967,17 @@ extern void decl_value_expr_insert (tree, tree);
 /* The DECL_RTL for NODE, if it is set, or NULL, if it is not set.  */
 #define DECL_RTL_IF_SET(NODE) (DECL_RTL_SET_P (NODE) ? DECL_RTL (NODE) : NULL)
 
+#if (GCC_VERSION >= 2007)
+#define DECL_RTL_KNOWN_SET(decl) __extension__                         \
+({  tree const __d = (decl);                                           \
+    gcc_checking_assert (DECL_RTL_SET_P (__d));                                \
+    /* Dereference it so the compiler knows it can't be NULL even      \
+       without assertion checking.  */                                 \
+    &*DECL_RTL_IF_SET (__d); })
+#else
+#define DECL_RTL_KNOWN_SET(decl) (&*DECL_RTL_IF_SET (decl))
+#endif
+
 /* In VAR_DECL and PARM_DECL nodes, nonzero means declared `register'.  */
 #define DECL_REGISTER(NODE) (DECL_WRTL_CHECK (NODE)->decl_common.decl_flag_0)