From 70fa1fbea7786425471b0d43aae320920fd4e917 Mon Sep 17 00:00:00 2001
From: Inokentiy Babushkin <twk@twki.de>
Date: Sat, 10 Jun 2017 12:21:24 +0200
Subject: [PATCH] Added a `StableHasherResult` impl for `u128`.

---
 src/librustc_data_structures/stable_hasher.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/librustc_data_structures/stable_hasher.rs b/src/librustc_data_structures/stable_hasher.rs
index 634d3041bf4a..f3572d3e25b3 100644
--- a/src/librustc_data_structures/stable_hasher.rs
+++ b/src/librustc_data_structures/stable_hasher.rs
@@ -78,6 +78,17 @@ impl StableHasherResult for [u8; 20] {
     }
 }
 
+impl StableHasherResult for u128 {
+    fn finish(mut hasher: StableHasher<Self>) -> Self {
+        let hash_bytes: &[u8] = hasher.finalize();
+        assert!(hash_bytes.len() >= mem::size_of::<u64>() * 2);
+
+        unsafe {
+            ::std::ptr::read_unaligned(hash_bytes.as_ptr() as *const u128)
+        }
+    }
+}
+
 impl StableHasherResult for u64 {
     fn finish(mut hasher: StableHasher<Self>) -> Self {
         hasher.state.finalize();