[Bug middle-end/50633] [4.7 Regression] New test failures

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50633

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> 2011-10-06 18:50:14 UTC ---
This patch seems to work:

diff --git a/gcc/function.c b/gcc/function.c
index 863f09d..0bc1dd9 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -5312,6 +5312,21 @@ frame_required_for_rtx (rtx *loc, void *data
ATTRIBUTE_UNUSED)
   if (x == stack_pointer_rtx || x == hard_frame_pointer_rtx
       || x == arg_pointer_rtx || x == pic_offset_table_rtx)
     return 1;
+  if (x != NULL
+      && REG_P (x)
+      && ((stack_pointer_rtx != NULL
+      && REG_P (stack_pointer_rtx)
+      && REGNO (x) == REGNO (stack_pointer_rtx))
+      || (hard_frame_pointer_rtx != NULL
+          && REG_P (hard_frame_pointer_rtx)
+          && REGNO (x) == REGNO (hard_frame_pointer_rtx))
+      || (arg_pointer_rtx != NULL
+          && REG_P (arg_pointer_rtx)
+          && REGNO (x) == REGNO (arg_pointer_rtx))
+      || (pic_offset_table_rtx != NULL
+          && REG_P (pic_offset_table_rtx)
+          && REGNO (x) == REGNO (pic_offset_table_rtx))))
+    return 1;
   return 0;
 }