Add test for slice drop shims

Author: matthewjasper

src/test/mir-opt/slice-drop-shim.rs

@@ -0,0 +1,92 @@
+fn main() {
+    std::ptr::drop_in_place::<[String]> as unsafe fn(_);
+}
+
+// END RUST SOURCE
+
+// START rustc.ptr-real_drop_in_place.[std__string__String].AddMovesForPackedDrops.before.mir
+// let mut _2: usize;
+// let mut _3: bool;
+// let mut _4: usize;
+// let mut _5: usize;
+// let mut _6: &mut std::string::String;
+// let mut _7: bool;
+// let mut _8: &mut std::string::String;
+// let mut _9: bool;
+// let mut _10: *mut std::string::String;
+// let mut _11: usize;
+// let mut _12: *mut std::string::String;
+// let mut _13: &mut std::string::String;
+// let mut _14: bool;
+// let mut _15: &mut std::string::String;
+// let mut _16: bool;
+// let mut _17: *mut [std::string::String];
+// bb0: {
+//     goto -> bb15;
+// }
+// bb1: {
+//     return;
+// }
+// bb2 (cleanup): {
+//     resume;
+// }
+// bb3 (cleanup): {
+//     _6 = &mut (*_1)[_4];
+//     _4 = Add(_4, const 1usize);
+//     drop((*_6)) -> bb4;
+// }
+// bb4 (cleanup): {
+//     _7 = Eq(_4, _5);
+//     switchInt(move _7) -> [false: bb3, otherwise: bb2];
+// }
+// bb5: {
+//     _8 = &mut (*_1)[_4];
+//     _4 = Add(_4, const 1usize);
+//     drop((*_8)) -> [return: bb6, unwind: bb4];
+// }
+// bb6: {
+//     _9 = Eq(_4, _5);
+//     switchInt(move _9) -> [false: bb5, otherwise: bb1];
+// }
+// bb7: {
+//     _5 = Len((*_1));
+//     _4 = const 0usize;
+//     goto -> bb6;
+// }
+// bb8: {
+//     goto -> bb7;
+// }
+// bb9 (cleanup): {
+//     _13 = &mut (*_10);
+//     _10 = Offset(_10, const 1usize);
+//     drop((*_13)) -> bb10;
+// }
+// bb10 (cleanup): {
+//     _14 = Eq(_10, _12);
+//     switchInt(move _14) -> [false: bb9, otherwise: bb2];
+// }
+// bb11: {
+//     _15 = &mut (*_10);
+//     _10 = Offset(_10, const 1usize);
+//     drop((*_15)) -> [return: bb12, unwind: bb10];
+// }
+// bb12: {
+//     _16 = Eq(_10, _12);
+//     switchInt(move _16) -> [false: bb11, otherwise: bb1];
+// }
+// bb13: {
+//     _11 = Len((*_1));
+//     _17 = &mut (*_1);
+//     _10 = move _17 as *mut std::string::String (Misc);
+//     _12 = Offset(_10, move _11);
+//     goto -> bb12;
+// }
+// bb14: {
+//     goto -> bb13;
+// }
+// bb15: {
+//     _2 = SizeOf(std::string::String);
+//     _3 = Eq(move _2, const 0usize);
+//     switchInt(move _3) -> [false: bb14, otherwise: bb8];
+// }
+// END rustc.ptr-real_drop_in_place.[std__string__String].AddMovesForPackedDrops.before.mir