backend: compile comparison instrs and branches

1 files changed, 19 insertions, 0 deletions

diff --git a/test/fib.c b/test/fib.c
new file mode 100644
index 0000000..6254a5f
--- /dev/null
+++ b/test/fib.c
@@ -0,0 +1,19 @@
+unsigned fib(unsigned x) {
+   unsigned r = 0, q = 1;
+   while (x--) {
+      unsigned s = r + q;
+      r = q;
+      q = s;
+   }
+   return q;
+}
+
+int atoi(const char *);
+int printf(const char *, ...);
+
+int main(int argc, char **argv) {
+   unsigned n = argv[1] ? atoi(argv[1]) : 10;
+   printf("fib(%u) = %u\n", n, fib(n));
+}
+
+/* vim:set ts=3 sw=3 expandtab: */