Replace all uses of SHA-256 with BLAKE2b.

mk/crates.mk

@@ -121,7 +121,7 @@ DEPS_rustc_driver := arena flate getopts graphviz libc rustc rustc_back rustc_bo
                      rustc_trans rustc_privacy rustc_lint rustc_plugin \
                      rustc_metadata syntax_ext proc_macro_plugin \
                      rustc_passes rustc_save_analysis rustc_const_eval \
-                     rustc_incremental syntax_pos rustc_errors proc_macro
+                     rustc_incremental syntax_pos rustc_errors proc_macro rustc_data_structures
 DEPS_rustc_errors := log libc serialize syntax_pos
 DEPS_rustc_lint := rustc log syntax syntax_pos rustc_const_eval
 DEPS_rustc_llvm := native:rustllvm libc std rustc_bitflags

src/librustc/lib.rs

@@ -111,8 +111,6 @@ pub mod traits;
 pub mod ty;
 
 pub mod util {
-    pub use rustc_back::sha2;
-
     pub mod common;
     pub mod ppaux;
     pub mod nodemap;

src/librustc/ty/util.rs

@@ -405,6 +405,7 @@ impl<'a, 'gcx, 'tcx> TyCtxt<'a, 'gcx, 'tcx> {
 ///
 /// The same goes for endianess: We always convert multi-byte integers to little
 /// endian before hashing.
+#[derive(Debug)]
 pub struct ArchIndependentHasher<H> {
     inner: H,
 }
@@ -413,6 +414,10 @@ impl<H> ArchIndependentHasher<H> {
     pub fn new(inner: H) -> ArchIndependentHasher<H> {
         ArchIndependentHasher { inner: inner }
     }
+
+    pub fn into_inner(self) -> H {
+        self.inner
+    }
 }
 
 impl<H: Hasher> Hasher for ArchIndependentHasher<H> {

src/librustc_back/lib.rs

@@ -36,9 +36,8 @@
 #![feature(rand)]
 #![feature(rustc_private)]
 #![feature(staged_api)]
-#![feature(step_by)]
 #![cfg_attr(stage0, feature(question_mark))]
-#![cfg_attr(test, feature(test, rand))]
+#![cfg_attr(test, feature(rand))]
 
 extern crate syntax;
 extern crate libc;
@@ -48,7 +47,6 @@ extern crate serialize;
 extern crate serialize as rustc_serialize; // used by deriving
 
 pub mod tempdir;
-pub mod sha2;
 pub mod target;
 pub mod slice;
 pub mod dynamic_lib;