This patch declares loop index variable j as a 32 bit int instead of
  assuming ints are 32 bits. The smaller int size on the avr makes prior
  passes optimize away the loop exit check (j < 10000000), as the constant
  is outside the range of a 16 bit int.

  Committed to trunk, after reg testing with avr and x86_64-pc-linux



2016-10-11  Senthil Kumar Selvaraj  <senthil_kumar.selva...@atmel.com>

        * gcc.dg/tree-ssa/pr59597.c: Typedef  __INT32_TYPE__ to i32.
        (main): Declare j as i32 instead of int.

Index: gcc/testsuite/gcc.dg/tree-ssa/pr59597.c
--- gcc/testsuite/gcc.dg/tree-ssa/pr59597.c     (revision 240974)
+++ gcc/testsuite/gcc.dg/tree-ssa/pr59597.c     (working copy)
@@ -4,6 +4,8 @@
 typedef unsigned short u16;
 typedef unsigned char u8;
 typedef unsigned int u32;
+__extension__ typedef __INT32_TYPE__ i32;
 long int random(int);
 #define NNN 10
@@ -37,7 +39,7 @@
 main (int argc, char argv[])
-  int i, j; u16 crc;
+  int i; i32 j; u16 crc;
   for (j = 0; j < 10000000; j++)
       for (i = 0; i < NNN; i++)

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