Rollup merge of #44364 - michaelwoerister:hash-all-the-things2, r=nikomatsakis

incr.comp.: Compute fingerprint for all query results.

This PR enables query result fingerprinting in incremental mode. This is an essential piece of infrastructure for red/green tracking. We don't do anything with the fingerprints yet but merging the infrastructure should protect it from bit-rotting and will make it easier to start measuring its performance impact (and thus let us determine if we should switch to a faster hashing algorithm rather sooner than later).

Note, this PR also includes the changes from https://github.com/rust-lang/rust/pull/43887 which I'm therefore closing. No need to re-review the first commit though.

r? @nikomatsakis

1 files changed, 6 insertions, 3 deletions

diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index 5248f874a6e..496be8b3eb2 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -1221,7 +1221,8 @@ pub enum ImplItemKind {
     Macro(Mac),
 }
 
-#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy,
+         PartialOrd, Ord)]
 pub enum IntTy {
     Is,
     I8,
@@ -1274,7 +1275,8 @@ impl IntTy {
     }
 }
 
-#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy,
+         PartialOrd, Ord)]
 pub enum UintTy {
     Us,
     U8,
@@ -1324,7 +1326,8 @@ impl fmt::Display for UintTy {
     }
 }
 
-#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy)]
+#[derive(Clone, PartialEq, Eq, RustcEncodable, RustcDecodable, Hash, Copy,
+         PartialOrd, Ord)]
 pub enum FloatTy {
     F32,
     F64,