Index: alpha-tdep.c
===================================================================
--- alpha-tdep.c	(revision 131933)
+++ alpha-tdep.c	(working copy)
@@ -1149,6 +1149,11 @@ alpha_heuristic_frame_unwind_cache (stru
     if (trad_frame_addr_p(info->saved_regs, reg))
       info->saved_regs[reg].addr += val - 1;
 
+  /* The stack pointer of the previous frame is computed by popping
+     the current stack frame.  */
+  if (!trad_frame_addr_p (info->saved_regs, ALPHA_SP_REGNUM))
+   trad_frame_set_value (info->saved_regs, ALPHA_SP_REGNUM, info->vfp);
+
   return info;
 }