wasmer/lib/emscripten/emtests/test_indirectbr.c
2019-01-10 21:38:10 -08:00

28 lines
688 B
C

/*
* Copyright 2016 The Emscripten Authors. All rights reserved.
* Emscripten is available under two separate licenses, the MIT license and the
* University of Illinois/NCSA Open Source License. Both these licenses can be
* found in the LICENSE file.
*/
#include <stdio.h>
int main(void) {
const void *addrs[2] = {&&FOO, &&BAR};
// confuse the optimizer so it doesn't hardcode the jump and avoid generating
// an |indirectbr| instruction
int which = 0;
for (int x = 0; x < 1000; x++) which = (which + x * x) % 7;
which = (which % 2) + 1;
goto *addrs[which];
FOO:
printf("bad\n");
return 0;
BAR:
printf("good\n");
const void *addr = &&FOO;
goto *addr;
}