renames EvalContext to InterpretCx in docs and comments.

src/librustc/mir/interpret/mod.rs

@@ -344,7 +344,7 @@ impl<'tcx> AllocMap<'tcx> {
         }
     }
 
-    /// Returns `None` in case the `AllocId` is dangling. An `EvalContext` can still have a
+    /// Returns `None` in case the `AllocId` is dangling. An `InterpretCx` can still have a
     /// local `Allocation` for that `AllocId`, but having such an `AllocId` in a constant is
     /// illegal and will likely ICE.
     /// This function exists to allow const eval to detect the difference between evaluation-

src/librustc_mir/const_eval.rs

@@ -34,7 +34,7 @@ const STEPS_UNTIL_DETECTOR_ENABLED: isize = 1_000_000;
 /// Should be a power of two for performance reasons.
 const DETECTOR_SNAPSHOT_PERIOD: isize = 256;
 
-/// The `EvalContext` is only meant to be used to do field and index projections into constants for
+/// The `InterpretCx` is only meant to be used to do field and index projections into constants for
 /// `simd_shuffle` and const patterns in match arms.
 ///
 /// The function containing the `match` that is currently being analyzed may have generic bounds