rtl.h (shallow_copy_rtvec): Declare.

gcc/
	* rtl.h (shallow_copy_rtvec): Declare.
	* rtl.c (shallow_copy_rtvec): New function.
	* cselib.c (cselib_subst_to_values): Use it.  Only modify an
	rtx field if the subrtx has changed.

From-SVN: r153475

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/rtl.h b/gcc/rtl.h
index ee464b7..0f7044e 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1568,6 +1568,7 @@ extern rtx rtx_alloc_stat (RTX_CODE MEM_STAT_DECL);
 #define rtx_alloc(c) rtx_alloc_stat (c MEM_STAT_INFO)
 
 extern rtvec rtvec_alloc (int);
+extern rtvec shallow_copy_rtvec (rtvec);
 extern bool shared_const_p (const_rtx);
 extern rtx copy_rtx (rtx);
 extern void dump_rtx_statistics (void);