clarify operator precedence

Author: matthiaskrgr

src/libcore/hash/sip.rs

@@ -304,7 +304,7 @@ impl<S: Sip> super::Hasher for Hasher<S> {
 
         if self.ntail != 0 {
             needed = 8 - self.ntail;
-            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << 8 * self.ntail;
+            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
             if length < needed {
                 self.ntail += length;
                 return;

src/librustc/ty/query/on_disk_cache.rs

@@ -997,7 +997,7 @@ impl SpecializedEncoder<IntEncodedWithFixedSize> for opaque::Encoder {
     fn specialized_encode(&mut self, x: &IntEncodedWithFixedSize) -> Result<(), Self::Error> {
         let start_pos = self.position();
         for i in 0..IntEncodedWithFixedSize::ENCODED_SIZE {
-            ((x.0 >> i * 8) as u8).encode(self)?;
+            ((x.0 >> (i * 8)) as u8).encode(self)?;
         }
         let end_pos = self.position();
         assert_eq!((end_pos - start_pos), IntEncodedWithFixedSize::ENCODED_SIZE);

src/librustc_data_structures/sip128.rs

@@ -274,7 +274,7 @@ impl Hasher for SipHasher128 {
 
         if self.ntail != 0 {
             needed = 8 - self.ntail;
-            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << 8 * self.ntail;
+            self.tail |= unsafe { u8to64_le(msg, 0, cmp::min(length, needed)) } << (8 * self.ntail);
             if length < needed {
                 self.ntail += length;
                 return;