diff --git a/src/librustc_trans/trans/adt.rs b/src/librustc_trans/trans/adt.rs
index 59487c0362c89..2c11aad894044 100644
--- a/src/librustc_trans/trans/adt.rs
+++ b/src/librustc_trans/trans/adt.rs
@@ -956,7 +956,7 @@ fn load_discr(bcx: Block, ity: IntType, ptr: ValueRef, min: Disr, max: Disr)
     assert_eq!(val_ty(ptr), llty.ptr_to());
     let bits = machine::llbitsize_of_real(bcx.ccx(), llty);
     assert!(bits <= 64);
-    let  bits = bits as usize;
+    let bits = bits as usize;
     let mask = Disr(!0u64 >> (64 - bits));
     // For a (max) discr of -1, max will be `-1 as usize`, which overflows.
     // However, that is fine here (it would still represent the full range),
@@ -969,7 +969,7 @@ fn load_discr(bcx: Block, ity: IntType, ptr: ValueRef, min: Disr, max: Disr)
     } else {
         // llvm::ConstantRange can deal with ranges that wrap around,
         // so an overflow on (max + 1) is fine.
-        LoadRangeAssert(bcx, ptr, min, max.wrapping_add(Disr(1)), /* signed: */ True)
+        LoadRangeAssert(bcx, ptr, min.0, max.0.wrapping_add(1), /* signed: */ True)
     }
 }
 
diff --git a/src/librustc_trans/trans/base.rs b/src/librustc_trans/trans/base.rs
index 3909cb2df2364..4c619f895de56 100644
--- a/src/librustc_trans/trans/base.rs
+++ b/src/librustc_trans/trans/base.rs
@@ -1023,11 +1023,11 @@ pub fn load_ty<'blk, 'tcx>(cx: Block<'blk, 'tcx>, ptr: ValueRef, t: Ty<'tcx>) ->
     }
 
     let val = if t.is_bool() {
-        LoadRangeAssert(cx, ptr, Disr(0), Disr(2), llvm::False)
+        LoadRangeAssert(cx, ptr, 0, 2, llvm::False)
     } else if t.is_char() {
         // a char is a Unicode codepoint, and so takes values from 0
         // to 0x10FFFF inclusive only.
-        LoadRangeAssert(cx, ptr, Disr(0), Disr(0x10FFFF + 1), llvm::False)
+        LoadRangeAssert(cx, ptr, 0, 0x10FFFF + 1, llvm::False)
     } else if (t.is_region_ptr() || t.is_unique()) && !common::type_is_fat_ptr(cx.tcx(), t) {
         LoadNonNull(cx, ptr)
     } else {
diff --git a/src/librustc_trans/trans/build.rs b/src/librustc_trans/trans/build.rs
index 89e5855717952..5a3fcc8d27f3c 100644
--- a/src/librustc_trans/trans/build.rs
+++ b/src/librustc_trans/trans/build.rs
@@ -21,7 +21,6 @@ use syntax::codemap::Span;
 use trans::builder::Builder;
 use trans::type_::Type;
 use trans::debuginfo::DebugLoc;
-use trans::Disr;
 
 use libc::{c_uint, c_char};
 
@@ -578,8 +577,8 @@ pub fn AtomicLoad(cx: Block, pointer_val: ValueRef, order: AtomicOrdering) -> Va
 }
 
 
-pub fn LoadRangeAssert(cx: Block, pointer_val: ValueRef, lo: Disr,
-                       hi: Disr, signed: llvm::Bool) -> ValueRef {
+pub fn LoadRangeAssert(cx: Block, pointer_val: ValueRef, lo: u64,
+                       hi: u64, signed: llvm::Bool) -> ValueRef {
     if cx.unreachable.get() {
         let ccx = cx.fcx.ccx;
         let ty = val_ty(pointer_val);
@@ -592,7 +591,7 @@ pub fn LoadRangeAssert(cx: Block, pointer_val: ValueRef, lo: Disr,
             llvm::LLVMGetUndef(eltty.to_ref())
         }
     } else {
-        B(cx).load_range_assert(pointer_val, lo.0, hi.0, signed)
+        B(cx).load_range_assert(pointer_val, lo, hi, signed)
     }
 }
 
diff --git a/src/librustc_trans/trans/foreign.rs b/src/librustc_trans/trans/foreign.rs
index 217310d6610b7..b1f62477bb767 100644
--- a/src/librustc_trans/trans/foreign.rs
+++ b/src/librustc_trans/trans/foreign.rs
@@ -27,7 +27,6 @@ use trans::monomorphize;
 use trans::type_::Type;
 use trans::type_of::*;
 use trans::type_of;
-use trans::Disr;
 use middle::infer;
 use middle::ty::{self, Ty};
 use middle::subst::Substs;
@@ -335,7 +334,7 @@ pub fn trans_native_call<'blk, 'tcx>(bcx: Block<'blk, 'tcx>,
             llarg_rust
         } else {
             if passed_arg_tys[i].is_bool() {
-                let val = LoadRangeAssert(bcx, llarg_rust, Disr(0), Disr(2), llvm::False);
+                let val = LoadRangeAssert(bcx, llarg_rust, 0, 2, llvm::False);
                 Trunc(bcx, val, Type::i1(bcx.ccx()))
             } else {
                 Load(bcx, llarg_rust)