[Patch, testsuite] Fix failing attr-alloc_size-10.c for avr

[Senthil Kumar Selvaraj]

Hi,

Integer promotion combined with equal sizes for short and int (16 bits)
causes overflow warnings when expanding the TEST macro for USHRT_MAX.

Fixed by explicitly disabling overflow warnings for targets with !int32plus.

Committed as obvious.

Regards
Senthil


gcc/testsuite/ChangeLog

2017-04-25  Senthil Kumar Selvaraj  <senthil_kumar.selva...@atmel.com>

        * gcc.dg/attr-alloc_size-10.c: Ignore overflow warnings
        for targets with int size less than 32 bits.


Index: gcc/testsuite/gcc.dg/attr-alloc_size-10.c
===================================================================
--- gcc/testsuite/gcc.dg/attr-alloc_size-10.c   (revision 247191)
+++ gcc/testsuite/gcc.dg/attr-alloc_size-10.c   (working copy)
@@ -4,7 +4,8 @@
    range.
 
    { dg-do compile }
-   { dg-options "-O2 -Walloc-size-larger-than=12" } */
+   { dg-options "-O2 -Walloc-size-larger-than=12" } 
+   { dg-options "-Wno-overflow" { target { ! int32plus } } } */
 
 #define SCHAR_MAX __SCHAR_MAX__
 #define SCHAR_MIN (-SCHAR_MAX - 1)