tests: robustify -k test
Split stack-fcall.c into several compilation units so that intermediate
function calls would not be optimized out by compiler.
* tests/stack-fcall.c: Move intermediate functions to ...
* tests/stack-fcall-*.c: ... new files.
* tests/Makefile.am (stack_fcall_SOURCES): Add stack-fcall-*.c.
diff --git a/tests/stack-fcall-0.c b/tests/stack-fcall-0.c
new file mode 100644
index 0000000..12a260d
--- /dev/null
+++ b/tests/stack-fcall-0.c
@@ -0,0 +1,6 @@
+int f1(int i);
+
+int f0(int i)
+{
+ return f1(i) - i;
+}