#include <stdio.h>
#include <limits.h>

void compare (int a) {
	if ((a+1) > a)
		printf("%d > %d\n", (a+1), a);
	else
		printf("%d <= %d\n", (a+1), a);
}

int main () {
	/* 
	 * When compiled with gcc -O0, I get different results for
	 * both lines. With gcc -O1, I get the same. When compiling
	 * with clang, I even more surprising results.
	 *
	 * Surprisingly (or not), these results do not correspond to
	 * bugs in the compilers.
	 *
	 * The warning given by both compilers helps understanding
	 * what's going on, but I had to read the standard to really
	 * get it.
	 */
	int i = 33;
	printf("%d\n", 1 << 33);
	printf("%d\n", 1 << i);
	
	/*
	 * adapted from http://blog.regehr.org/archives/213
	 *
	 * Try compiling this with -O0 and with -O3, and see ...
	 * Again, no compiler bug involved!
	 */
	compare(1);
	compare(INT_MAX);
}