ICH: Add regression tests for various kinds of loops.

4 files changed, 1049 insertions, 0 deletions

diff --git a/src/test/incremental/hashes/for_loops.rs b/src/test/incremental/hashes/for_loops.rs
new file mode 100644
index 00000000000..7a8502f7caa
--- /dev/null
+++ b/src/test/incremental/hashes/for_loops.rs
@@ -0,0 +1,306 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+// This test case tests the incremental compilation hash (ICH) implementation
+// for `for` loops.
+
+// The general pattern followed here is: Change one thing between rev1 and rev2
+// and make sure that the hash has changed, then change nothing between rev2 and
+// rev3 and make sure that the hash has not changed.
+
+// must-compile-successfully
+// revisions: cfail1 cfail2 cfail3
+// compile-flags: -Z query-dep-graph
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_body() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_body() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 2;
+        break;
+    }
+}
+
+
+
+// Change iteration variable name ----------------------------------------------
+#[cfg(cfail1)]
+fn change_iteration_variable_name() {
+    let mut _x = 0;
+    for _i in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_iteration_variable_name() {
+    let mut _x = 0;
+    for _a in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Change iteration variable pattern -------------------------------------------
+#[cfg(cfail1)]
+fn change_iteration_variable_pattern() {
+    let mut _x = 0;
+    for _i in &[0, 1, 2] {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_iteration_variable_pattern() {
+    let mut _x = 0;
+    for &_i in &[0, 1, 2] {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Change iterable -------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_iterable() {
+    let mut _x = 0;
+    for _ in &[0, 1, 2] {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_iterable() {
+    let mut _x = 0;
+    for _ in &[0, 1, 3] {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add break -------------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_break() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_break() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label --------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label() {
+    let mut _x = 0;
+    'label: for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label to break -----------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: for _ in 0..1 {
+        _x = 1;
+        break 'label;
+    }
+}
+
+
+
+// Change break label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: for _ in 0..1 {
+        'inner: for _ in 0..1 {
+            _x = 1;
+            break 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: for _ in 0..1 {
+        'inner: for _ in 0..1 {
+            _x = 1;
+            break 'outer;
+        }
+    }
+}
+
+
+
+// Add loop label to continue --------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: for _ in 0..1 {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: for _ in 0..1 {
+        _x = 1;
+        continue 'label;
+    }
+}
+
+
+
+// Change continue label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: for _ in 0..1 {
+        'inner: for _ in 0..1 {
+            _x = 1;
+            continue 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: for _ in 0..1 {
+        'inner: for _ in 0..1 {
+            _x = 1;
+            continue 'outer;
+        }
+    }
+}
+
+
+
+// Change continue to break ----------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    for _ in 0..1 {
+        _x = 1;
+        break;
+    }
+}
diff --git a/src/test/incremental/hashes/loop_expressions.rs b/src/test/incremental/hashes/loop_expressions.rs
new file mode 100644
index 00000000000..eaa5f68b98c
--- /dev/null
+++ b/src/test/incremental/hashes/loop_expressions.rs
@@ -0,0 +1,231 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+// This test case tests the incremental compilation hash (ICH) implementation
+// for `loop` loops.
+
+// The general pattern followed here is: Change one thing between rev1 and rev2
+// and make sure that the hash has changed, then change nothing between rev2 and
+// rev3 and make sure that the hash has not changed.
+
+// must-compile-successfully
+// revisions: cfail1 cfail2 cfail3
+// compile-flags: -Z query-dep-graph
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_body() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_body() {
+    let mut _x = 0;
+    loop {
+        _x = 2;
+        break;
+    }
+}
+
+
+
+// Add break -------------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_break() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_break() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label --------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label() {
+    let mut _x = 0;
+    'label: loop {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label to break -----------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: loop {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: loop {
+        _x = 1;
+        break 'label;
+    }
+}
+
+
+
+// Change break label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: loop {
+        'inner: loop {
+            _x = 1;
+            break 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: loop {
+        'inner: loop {
+            _x = 1;
+            break 'outer;
+        }
+    }
+}
+
+
+
+// Add loop label to continue --------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: loop {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: loop {
+        _x = 1;
+        continue 'label;
+    }
+}
+
+
+
+// Change continue label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: loop {
+        'inner: loop {
+            _x = 1;
+            continue 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: loop {
+        'inner: loop {
+            _x = 1;
+            continue 'outer;
+        }
+    }
+}
+
+
+
+// Change continue to break ----------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    loop {
+        _x = 1;
+        break;
+    }
+}
diff --git a/src/test/incremental/hashes/while_let_loops.rs b/src/test/incremental/hashes/while_let_loops.rs
new file mode 100644
index 00000000000..405645bd1b8
--- /dev/null
+++ b/src/test/incremental/hashes/while_let_loops.rs
@@ -0,0 +1,256 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+// This test case tests the incremental compilation hash (ICH) implementation
+// for `while let` loops.
+
+// The general pattern followed here is: Change one thing between rev1 and rev2
+// and make sure that the hash has changed, then change nothing between rev2 and
+// rev3 and make sure that the hash has not changed.
+
+// must-compile-successfully
+// revisions: cfail1 cfail2 cfail3
+// compile-flags: -Z query-dep-graph
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_body() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_body() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 2;
+        break;
+    }
+}
+
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_condition() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_condition() {
+    let mut _x = 0;
+    while let Some(1u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add break -------------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_break() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_break() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label --------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label() {
+    let mut _x = 0;
+    'label: while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label to break -----------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: while let Some(0u32) = None {
+        _x = 1;
+        break 'label;
+    }
+}
+
+
+
+// Change break label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: while let Some(0u32) = None {
+        'inner: while let Some(0u32) = None {
+            _x = 1;
+            break 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: while let Some(0u32) = None {
+        'inner: while let Some(0u32) = None {
+            _x = 1;
+            break 'outer;
+        }
+    }
+}
+
+
+
+// Add loop label to continue --------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: while let Some(0u32) = None {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: while let Some(0u32) = None {
+        _x = 1;
+        continue 'label;
+    }
+}
+
+
+
+// Change continue label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: while let Some(0u32) = None {
+        'inner: while let Some(0u32) = None {
+            _x = 1;
+            continue 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: while let Some(0u32) = None {
+        'inner: while let Some(0u32) = None {
+            _x = 1;
+            continue 'outer;
+        }
+    }
+}
+
+
+
+// Change continue to break ----------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    while let Some(0u32) = None {
+        _x = 1;
+        break;
+    }
+}
diff --git a/src/test/incremental/hashes/while_loops.rs b/src/test/incremental/hashes/while_loops.rs
new file mode 100644
index 00000000000..f16611ee463
--- /dev/null
+++ b/src/test/incremental/hashes/while_loops.rs
@@ -0,0 +1,256 @@
+// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+
+// This test case tests the incremental compilation hash (ICH) implementation
+// for `while` loops.
+
+// The general pattern followed here is: Change one thing between rev1 and rev2
+// and make sure that the hash has changed, then change nothing between rev2 and
+// rev3 and make sure that the hash has not changed.
+
+// must-compile-successfully
+// revisions: cfail1 cfail2 cfail3
+// compile-flags: -Z query-dep-graph
+
+#![allow(warnings)]
+#![feature(rustc_attrs)]
+#![crate_type="rlib"]
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_body() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_body() {
+    let mut _x = 0;
+    while true {
+        _x = 2;
+        break;
+    }
+}
+
+
+
+// Change loop body ------------------------------------------------------------
+#[cfg(cfail1)]
+fn change_loop_condition() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_loop_condition() {
+    let mut _x = 0;
+    while false {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add break -------------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_break() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_break() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label --------------------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label() {
+    let mut _x = 0;
+    'label: while true {
+        _x = 1;
+        break;
+    }
+}
+
+
+
+// Add loop label to break -----------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: while true {
+        _x = 1;
+        break;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_break() {
+    let mut _x = 0;
+    'label: while true {
+        _x = 1;
+        break 'label;
+    }
+}
+
+
+
+// Change break label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: while true {
+        'inner: while true {
+            _x = 1;
+            break 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_break_label() {
+    let mut _x = 0;
+    'outer: while true {
+        'inner: while true {
+            _x = 1;
+            break 'outer;
+        }
+    }
+}
+
+
+
+// Add loop label to continue --------------------------------------------------
+#[cfg(cfail1)]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: while true {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn add_loop_label_to_continue() {
+    let mut _x = 0;
+    'label: while true {
+        _x = 1;
+        continue 'label;
+    }
+}
+
+
+
+// Change continue label ----------------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: while true {
+        'inner: while true {
+            _x = 1;
+            continue 'inner;
+        }
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_label() {
+    let mut _x = 0;
+    'outer: while true {
+        'inner: while true {
+            _x = 1;
+            continue 'outer;
+        }
+    }
+}
+
+
+
+// Change continue to break ----------------------------------------------------
+#[cfg(cfail1)]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        continue;
+    }
+}
+
+#[cfg(not(cfail1))]
+#[rustc_dirty(label="Hir", cfg="cfail2")]
+#[rustc_clean(label="Hir", cfg="cfail3")]
+#[rustc_metadata_dirty(cfg="cfail2")]
+#[rustc_metadata_clean(cfg="cfail3")]
+fn change_continue_to_break() {
+    let mut _x = 0;
+    while true {
+        _x = 1;
+        break;
+    }
+}