Replace FnvHasher use with FxHasher.

This speeds up compilation by 3--6% across most of rustc-benchmarks.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/librustc_mir/transform/instcombine.rs b/src/librustc_mir/transform/instcombine.rs
index a01724d6d0e..c4a8d34bda0 100644
--- a/src/librustc_mir/transform/instcombine.rs
+++ b/src/librustc_mir/transform/instcombine.rs
@@ -14,7 +14,7 @@ use rustc::mir::{Location, Lvalue, Mir, Operand, ProjectionElem, Rvalue, Local};
 use rustc::mir::transform::{MirPass, MirSource, Pass};
 use rustc::mir::visit::{MutVisitor, Visitor};
 use rustc::ty::TyCtxt;
-use rustc::util::nodemap::FnvHashSet;
+use rustc::util::nodemap::FxHashSet;
 use rustc_data_structures::indexed_vec::Idx;
 use std::mem;
 
@@ -107,5 +107,5 @@ impl<'b, 'a, 'tcx> Visitor<'tcx> for OptimizationFinder<'b, 'a, 'tcx> {
 
 #[derive(Default)]
 struct OptimizationList {
-    and_stars: FnvHashSet<Location>,
+    and_stars: FxHashSet<Location>,
 }