1 files changed, 82 insertions, 0 deletions
diff --git a/tests/mir-opt/pre-codegen/loops.mapped.PreCodegen.after.mir b/tests/mir-opt/pre-codegen/loops.mapped.PreCodegen.after.mir
new file mode 100644
index 000000000..e4e1d052e
--- /dev/null
+++ b/tests/mir-opt/pre-codegen/loops.mapped.PreCodegen.after.mir
@@ -0,0 +1,82 @@
+// MIR for `mapped` after PreCodegen
+
+fn mapped(_1: impl Iterator<Item = T>, _2: impl Fn(T) -> U) -> () {
+    debug iter => _1;
+    debug f => _2;
+    let mut _0: ();
+    let mut _3: std::iter::Map<impl Iterator<Item = T>, impl Fn(T) -> U>;
+    let mut _4: std::iter::Map<impl Iterator<Item = T>, impl Fn(T) -> U>;
+    let mut _5: std::iter::Map<impl Iterator<Item = T>, impl Fn(T) -> U>;
+    let mut _6: &mut std::iter::Map<impl Iterator<Item = T>, impl Fn(T) -> U>;
+    let mut _7: std::option::Option<U>;
+    let mut _8: isize;
+    let _10: ();
+    scope 1 {
+        debug iter => _5;
+        let _9: U;
+        scope 2 {
+            debug x => _9;
+        }
+    }
+    scope 3 (inlined <Map<impl Iterator<Item = T>, impl Fn(T) -> U> as IntoIterator>::into_iter) {
+        debug self => _3;
+    }
+
+    bb0: {
+        StorageLive(_4);
+        StorageLive(_3);
+        _3 = <impl Iterator<Item = T> as Iterator>::map::<U, impl Fn(T) -> U>(move _1, move _2) -> [return: bb1, unwind continue];
+    }
+
+    bb1: {
+        _4 = move _3;
+        StorageDead(_3);
+        StorageLive(_5);
+        _5 = move _4;
+        goto -> bb2;
+    }
+
+    bb2: {
+        StorageLive(_7);
+        _6 = &mut _5;
+        _7 = <Map<impl Iterator<Item = T>, impl Fn(T) -> U> as Iterator>::next(_6) -> [return: bb3, unwind: bb9];
+    }
+
+    bb3: {
+        _8 = discriminant(_7);
+        switchInt(move _8) -> [0: bb4, 1: bb6, otherwise: bb8];
+    }
+
+    bb4: {
+        StorageDead(_7);
+        drop(_5) -> [return: bb5, unwind continue];
+    }
+
+    bb5: {
+        StorageDead(_5);
+        StorageDead(_4);
+        return;
+    }
+
+    bb6: {
+        _9 = move ((_7 as Some).0: U);
+        _10 = opaque::<U>(move _9) -> [return: bb7, unwind: bb9];
+    }
+
+    bb7: {
+        StorageDead(_7);
+        goto -> bb2;
+    }
+
+    bb8: {
+        unreachable;
+    }
+
+    bb9 (cleanup): {
+        drop(_5) -> [return: bb10, unwind terminate];
+    }
+
+    bb10 (cleanup): {
+        resume;
+    }
+}