Merge in gcc2 snapshot 19980929. See gcc/ChangeLog and gcc/FSFChangeLog for

[thirdparty/gcc.git] / gcc / reload1.c

diff --git a/gcc/reload1.c b/gcc/reload1.c
index d86c4069795a5af7e166754ac4a3ebfa2142bf1b..914009beb42468fca6fcdd8f9b5b1220121e79b2 100644 (file)
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -1175,6 +1175,28 @@ reload (first, global, dumpfile)
        warning ("frame size too large for reliable stack checking");
     }
 
+  /* If we are doing stack checking, give a warning if this function's
+     frame size is larger than we expect.  */
+  if (flag_stack_check && ! STACK_CHECK_BUILTIN)
+    {
+      HOST_WIDE_INT size = get_frame_size () + STACK_CHECK_FIXED_FRAME_SIZE;
+      static int verbose_warned = 0; 
+   
+      for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
+       if (regs_ever_live[i] && ! fixed_regs[i] && call_used_regs[i])
+         size += UNITS_PER_WORD;
+
+      if (size > STACK_CHECK_MAX_FRAME_SIZE)
+       { 
+         warning ("frame size too large for reliable stack checking");
+         if (! verbose_warned)
+           {
+             warning ("try reducing the number of local variables");
+             verbose_warned = 1;
+           }
+       }
+    }
+
   /* Indicate that we no longer have known memory locations or constants.  */
   if (reg_equiv_constant)
     free (reg_equiv_constant);