[Patch, avr] Fix broken stack-usage-1.c test

[Senthil Kumar Selvaraj]

Hi,

  A recent patch I submitted fixed broken -fstack-usage for the avr
  target, by including the size of the return address pushed to the stack
  (https://gcc.gnu.org/ml/gcc-patches/2016-05/msg01715.html).

  I forgot to send this testcase modification with that patch - here's
  the fix for making gcc.dg/stack-usage-1.c pass again for avr.

  If this is ok, could someone commit please? I don't have commit
  access.

Regards
Senthil

gcc/testsuite/ChangeLog

2016-06-08  Senthil Kumar Selvaraj  <senthil_kumar.selva...@atmel.com>

        * gcc.dg/stack-usage-1.c (SIZE): Consider return address
  when setting SIZE.

diff --git gcc/testsuite/gcc.dg/stack-usage-1.c 
gcc/testsuite/gcc.dg/stack-usage-1.c
index 7864c6a..bdc5656 100644
--- gcc/testsuite/gcc.dg/stack-usage-1.c
+++ gcc/testsuite/gcc.dg/stack-usage-1.c
@@ -64,7 +64,11 @@
 #    define SIZE 240
 #  endif
 #elif defined (__AVR__)
-#  define SIZE 254
+#if defined (__AVR_3_BYTE_PC__ )
+#  define SIZE 251 /* 256 - 2 bytes for Y - 3 bytes for return address */
+#else
+#  define SIZE 252 /* 256 - 2 bytes for Y - 2 bytes for return address */
+#endif
 #elif defined (__s390x__)
 #  define SIZE 96  /* 256 - 160 bytes for register save area */
 #elif defined (__s390__)