googlers / jrn / xz / 8e61380fd25b8cfca1a31c739fae2069ba798c27 / . / tests / bcj_test.c
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///////////////////////////////////////////////////////////////////////////////
/// \file bcj_test.c
/// \brief Source code of compress_prepared_bcj_*
/// This is a simple program that should make the compiler to generate
/// PC-relative branches, jumps, and calls. The compiled files can then
/// be used to test the branch conversion filters. Note that this program
/// itself does nothing useful.
/// Compiling: gcc -std=c99 -fPIC -c bcj_test.c
/// Don't optimize or strip.
// Author: Lasse Collin
// This file has been put into the public domain.
// You can do whatever you want with this file.
extern int jump(int a, int b);
call(int a, int b)
if (a < b)
a = jump(a, b);
return a;
jump(int a, int b)
// The loop generates conditional jump backwards.
if (a < b) {
a *= 2;
a += 3 * b;
// Put enough code here to prevent JMP SHORT on x86.
a += b;
a /= 2;
b += b % 5;
a -= b / 3;
b = 2 * b + a - 1;
a *= b + a + 1;
b += a - 1;
a += b * 2 - a / 5;
int a = call(argc, argc + 1);
return a == 0;