diff --git a/src/test/incremental/struct_add_field.rs b/src/test/incremental/struct_add_field.rs
new file mode 100644
index 0000000000000..425aa3e07a0ec
--- /dev/null
+++ b/src/test/incremental/struct_add_field.rs
@@ -0,0 +1,48 @@
+// Copyright 2014 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.
+
+// Test incremental compilation tracking where we change field names
+// in between revisions (hashing should be stable).
+
+// revisions:rpass1 rpass2
+
+#![feature(rustc_attrs)]
+
+pub struct X {
+    pub x: u32,
+
+    #[cfg(rpass2)]
+    pub x2: u32,
+}
+
+pub struct EmbedX {
+    x: X
+}
+
+pub struct Y {
+    pub y: char
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_X(x: X) -> u32 {
+    x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_EmbedX(embed: EmbedX) -> u32 {
+    embed.x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")] // FIXME(#33850) should be clean
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/struct_change_field_name.rs b/src/test/incremental/struct_change_field_name.rs
new file mode 100644
index 0000000000000..cf6f89bd8a4c5
--- /dev/null
+++ b/src/test/incremental/struct_change_field_name.rs
@@ -0,0 +1,55 @@
+// Copyright 2014 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.
+
+// Test incremental compilation tracking where we change field names
+// in between revisions (hashing should be stable).
+
+// revisions:rpass1 cfail2
+
+#![feature(rustc_attrs)]
+
+#[cfg(rpass1)]
+pub struct X {
+    pub x: u32
+}
+
+#[cfg(cfail2)]
+pub struct X {
+    pub y: u32
+}
+
+pub struct EmbedX {
+    x: X
+}
+
+pub struct Y {
+    pub y: char
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="cfail2")]
+pub fn use_X() -> u32 {
+    let x: X = X { x: 22 };
+    //[cfail2]~^ ERROR structure `X` has no field named `x`
+    x.x as u32
+    //[cfail2]~^ ERROR attempted access of field `x`
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="cfail2")]
+pub fn use_EmbedX(embed: EmbedX) -> u32 {
+    embed.x.x as u32
+    //[cfail2]~^ ERROR attempted access of field `x`
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="cfail2")] // FIXME(#33850) should be clean
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/struct_change_field_type.rs b/src/test/incremental/struct_change_field_type.rs
new file mode 100644
index 0000000000000..2bd61a3f559d4
--- /dev/null
+++ b/src/test/incremental/struct_change_field_type.rs
@@ -0,0 +1,53 @@
+// Copyright 2014 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.
+
+// Test incremental compilation tracking where we change nothing
+// in between revisions (hashing should be stable).
+
+// revisions:rpass1 rpass2
+
+#![feature(rustc_attrs)]
+
+#[cfg(rpass1)]
+pub struct X {
+    pub x: u32
+}
+
+#[cfg(rpass2)]
+pub struct X {
+    pub x: i32
+}
+
+pub struct EmbedX {
+    x: X
+}
+
+pub struct Y {
+    pub y: char
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_X() -> u32 {
+    let x: X = X { x: 22 };
+    x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_EmbedX(x: EmbedX) -> u32 {
+    let x: X = X { x: 22 };
+    x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")] // FIXME(#33850) should be clean
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/struct_change_field_type_cross_crate/auxiliary/a.rs b/src/test/incremental/struct_change_field_type_cross_crate/auxiliary/a.rs
new file mode 100644
index 0000000000000..2ddcaf157210d
--- /dev/null
+++ b/src/test/incremental/struct_change_field_type_cross_crate/auxiliary/a.rs
@@ -0,0 +1,29 @@
+// Copyright 2014 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.
+
+#![crate_type="rlib"]
+
+ #[cfg(rpass1)]
+pub struct X {
+    pub x: u32
+}
+
+#[cfg(rpass2)]
+pub struct X {
+    pub x: i32
+}
+
+pub struct EmbedX {
+    pub x: X
+}
+
+pub struct Y {
+    pub y: char
+}
diff --git a/src/test/incremental/struct_change_field_type_cross_crate/b.rs b/src/test/incremental/struct_change_field_type_cross_crate/b.rs
new file mode 100644
index 0000000000000..19f146ce176d7
--- /dev/null
+++ b/src/test/incremental/struct_change_field_type_cross_crate/b.rs
@@ -0,0 +1,36 @@
+// Copyright 2014 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.
+
+// aux-build:a.rs
+// revisions:rpass1 rpass2
+
+#![feature(rustc_attrs)]
+
+extern crate a;
+
+use a::*;
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_X() -> u32 {
+    let x: X = X { x: 22 };
+    x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_EmbedX(embed: EmbedX) -> u32 {
+    embed.x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")] // FIXME(#33850) should be clean
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/struct_change_nothing.rs b/src/test/incremental/struct_change_nothing.rs
new file mode 100644
index 0000000000000..8095e1ecd84a0
--- /dev/null
+++ b/src/test/incremental/struct_change_nothing.rs
@@ -0,0 +1,53 @@
+// Copyright 2014 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.
+
+// Test incremental compilation tracking where we change nothing
+// in between revisions (hashing should be stable).
+
+// revisions:rpass1 rpass2
+
+#![feature(rustc_attrs)]
+
+#[cfg(rpass1)]
+pub struct X {
+    pub x: u32
+}
+
+#[cfg(rpass2)]
+pub struct X {
+    pub x: u32
+}
+
+pub struct EmbedX {
+    x: X
+}
+
+pub struct Y {
+    pub y: char
+}
+
+#[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_X() -> u32 {
+    let x: X = X { x: 22 };
+    x.x as u32
+}
+
+#[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_EmbedX(x: EmbedX) -> u32 {
+    let x: X = X { x: 22 };
+    x.x as u32
+}
+
+#[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/struct_remove_field.rs b/src/test/incremental/struct_remove_field.rs
new file mode 100644
index 0000000000000..db49a7516275d
--- /dev/null
+++ b/src/test/incremental/struct_remove_field.rs
@@ -0,0 +1,52 @@
+// Copyright 2014 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.
+
+// Test incremental compilation tracking where we change field names
+// in between revisions (hashing should be stable).
+
+// revisions:rpass1 rpass2
+
+#![feature(rustc_attrs)]
+
+#[cfg(rpass1)]
+pub struct X {
+    pub x: u32,
+    pub x2: u32,
+}
+
+#[cfg(rpass2)]
+pub struct X {
+    pub x: u32,
+}
+
+pub struct EmbedX {
+    x: X
+}
+
+pub struct Y {
+    pub y: char
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_X(x: X) -> u32 {
+    x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+pub fn use_EmbedX(embed: EmbedX) -> u32 {
+    embed.x.x as u32
+}
+
+#[rustc_dirty(label="TypeckItemBody", cfg="rpass2")] // FIXME(#33850) should be clean
+pub fn use_Y() {
+    let x: Y = Y { y: 'c' };
+}
+
+pub fn main() { }
diff --git a/src/test/incremental/type_alias_cross_crate/auxiliary/a.rs b/src/test/incremental/type_alias_cross_crate/auxiliary/a.rs
index 2494dca0509b1..9be8021524c98 100644
--- a/src/test/incremental/type_alias_cross_crate/auxiliary/a.rs
+++ b/src/test/incremental/type_alias_cross_crate/auxiliary/a.rs
@@ -16,6 +16,10 @@ pub type X = u32;
 #[cfg(rpass2)]
 pub type X = i32;
 
+// this version doesn't actually change anything:
+#[cfg(rpass3)]
+pub type X = i32;
+
 pub type Y = char;
 
 pub fn foo() { }
diff --git a/src/test/incremental/type_alias_cross_crate/b.rs b/src/test/incremental/type_alias_cross_crate/b.rs
index b4e9b7601010a..c5421fcbf5cb2 100644
--- a/src/test/incremental/type_alias_cross_crate/b.rs
+++ b/src/test/incremental/type_alias_cross_crate/b.rs
@@ -9,19 +9,21 @@
 // except according to those terms.
 
 // aux-build:a.rs
-// revisions:rpass1 rpass2
+// revisions:rpass1 rpass2 rpass3
 
 #![feature(rustc_attrs)]
 
 extern crate a;
 
 #[rustc_dirty(label="TypeckItemBody", cfg="rpass2")]
+#[rustc_clean(label="TypeckItemBody", cfg="rpass3")]
 pub fn use_X() -> u32 {
     let x: a::X = 22;
     x as u32
 }
 
 #[rustc_clean(label="TypeckItemBody", cfg="rpass2")]
+#[rustc_clean(label="TypeckItemBody", cfg="rpass3")]
 pub fn use_Y() {
     let x: a::Y = 'c';
 }