subs_repetition: Add simple test cases

Author: CohenArthur

gcc/testsuite/rust/execute/torture/macros10.rs

@@ -0,0 +1,20 @@
+// { dg-output "18\n" }
+extern "C" {
+    fn printf(s: *const i8, ...);
+}
+
+fn print_int(value: i32) {
+    let s = "%d\n\0" as *const str as *const i8;
+    printf(s, value);
+}
+
+macro_rules! add_exprs {
+    ($($e:expr)*) => (0 $(+ $e)*)
+}
+
+fn main() -> i32 {
+    // 1 + 2 + 15 => 18
+    print_int(add_exprs!(1 2 15));
+
+    0
+}

gcc/testsuite/rust/execute/torture/macros11.rs

@@ -0,0 +1,22 @@
+// { dg-output "2" }
+extern "C" {
+    fn printf(s: *const i8, ...);
+}
+
+fn print_int(value: i32) {
+    let s = "%d\n\0";
+    let s_p = s as *const str;
+    let c_p = s_p as *const i8;
+    unsafe { printf(c_p, value); }
+}
+
+macro_rules! add_exprs {
+    ($($e:expr)?) => (0 $(+ $e)?)
+}
+
+fn main() -> i32 {
+    // 2
+    print_int(add_exprs!(2));
+
+    0
+}

gcc/testsuite/rust/execute/torture/macros12.rs

@@ -0,0 +1,20 @@
+// { dg-output "0\n" }
+extern "C" {
+    fn printf(s: *const i8, ...);
+}
+
+fn print_int(value: i32) {
+    let s = "%d\n\0" as *const str as *const i8;
+    printf(s, value);
+}
+
+macro_rules! add_exprs {
+    ($($e:expr)?) => (0 $(+ $e)?)
+}
+
+fn main() -> i32 {
+    // 0
+    print_int(add_exprs!());
+
+    0
+}

gcc/testsuite/rust/execute/torture/macros13.rs

@@ -0,0 +1,20 @@
+// { dg-output "18\n" }
+extern "C" {
+    fn printf(s: *const i8, ...);
+}
+
+fn print_int(value: i32) {
+    let s = "%d\n\0" as *const str as *const i8;
+    printf(s, value);
+}
+
+macro_rules! add_exprs {
+    ($($e:expr)+) => (0 $(+ $e)+)
+}
+
+fn main() -> i32 {
+    // 1 + 2 + 15 => 18
+    print_int(add_exprs!(1 2 15));
+
+    0
+}