diff --git a/src/librustc/lib.rs b/src/librustc/lib.rs
index bc24b54a5c7..fc2d68d7262 100644
--- a/src/librustc/lib.rs
+++ b/src/librustc/lib.rs
@@ -28,6 +28,7 @@
 #![feature(box_syntax)]
 #![feature(collections)]
 #![feature(const_fn)]
+#![feature(core_intrinsics)]
 #![feature(enumset)]
 #![feature(iter_arith)]
 #![feature(libc)]
diff --git a/src/librustc/mir/transform.rs b/src/librustc/mir/transform.rs
index 1480ecfc50e..f17984d3804 100644
--- a/src/librustc/mir/transform.rs
+++ b/src/librustc/mir/transform.rs
@@ -76,7 +76,9 @@ pub trait Pass {
     fn dep_node(&self, def_id: DefId) -> DepNode<DefId> {
         DepNode::MirPass(def_id)
     }
-    fn name(&self) -> &str;
+    fn name(&self) -> &str {
+        unsafe { ::std::intrinsics::type_name::<Self>() }
+    }
     fn disambiguator<'a>(&'a self) -> Option<Box<fmt::Display+'a>> { None }
 }
 
diff --git a/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs b/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
index 593a997bed5..362d6ce2aca 100644
--- a/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
+++ b/src/librustc_borrowck/borrowck/mir/elaborate_drops.rs
@@ -69,9 +69,7 @@ impl<'tcx> MirPass<'tcx> for ElaborateDrops {
     }
 }
 
-impl Pass for ElaborateDrops {
-    fn name(&self) -> &str { "elaborate-drops" }
-}
+impl Pass for ElaborateDrops {}
 
 struct InitializationData {
     live: IdxSetBuf<MovePathIndex>,
diff --git a/src/librustc_driver/driver.rs b/src/librustc_driver/driver.rs
index 260f8691349..ce132a04870 100644
--- a/src/librustc_driver/driver.rs
+++ b/src/librustc_driver/driver.rs
@@ -1059,7 +1059,7 @@ pub fn phase_4_translate_to_llvm<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         passes.push_pass(box mir::transform::simplify_cfg::SimplifyCfg::new("elaborate-drops"));
 
         passes.push_pass(box mir::transform::add_call_guards::AddCallGuards);
-        passes.push_pass(box mir::transform::dump_mir::Marker("pre-trans"));
+        passes.push_pass(box mir::transform::dump_mir::Marker("PreTrans"));
 
         passes.run_passes(tcx, &mut mir_map);
     });
diff --git a/src/librustc_mir/transform/add_call_guards.rs b/src/librustc_mir/transform/add_call_guards.rs
index 15cfa8046ed..63e975128c7 100644
--- a/src/librustc_mir/transform/add_call_guards.rs
+++ b/src/librustc_mir/transform/add_call_guards.rs
@@ -82,6 +82,4 @@ impl<'tcx> MirPass<'tcx> for AddCallGuards {
     }
 }
 
-impl Pass for AddCallGuards {
-    fn name(&self) -> &str { "add-call-guards" }
-}
+impl Pass for AddCallGuards {}
diff --git a/src/librustc_mir/transform/dump_mir.rs b/src/librustc_mir/transform/dump_mir.rs
index 941229d2c02..642adeee5cd 100644
--- a/src/librustc_mir/transform/dump_mir.rs
+++ b/src/librustc_mir/transform/dump_mir.rs
@@ -70,6 +70,4 @@ impl<'tcx> MirPassHook<'tcx> for DumpMir {
     }
 }
 
-impl<'b> Pass for DumpMir {
-    fn name(&self) -> &str { "dump-mir" }
-}
+impl<'b> Pass for DumpMir {}
diff --git a/src/librustc_mir/transform/erase_regions.rs b/src/librustc_mir/transform/erase_regions.rs
index 4c71fe98ec2..485ca3ea84a 100644
--- a/src/librustc_mir/transform/erase_regions.rs
+++ b/src/librustc_mir/transform/erase_regions.rs
@@ -43,9 +43,7 @@ impl<'a, 'tcx> MutVisitor<'tcx> for EraseRegionsVisitor<'a, 'tcx> {
 
 pub struct EraseRegions;
 
-impl Pass for EraseRegions {
-    fn name(&self) -> &str { "erase-regions" }
-}
+impl Pass for EraseRegions {}
 
 impl<'tcx> MirPass<'tcx> for EraseRegions {
     fn run_pass<'a>(&mut self, tcx: TyCtxt<'a, 'tcx, 'tcx>,
diff --git a/src/librustc_mir/transform/no_landing_pads.rs b/src/librustc_mir/transform/no_landing_pads.rs
index 610208de19a..818f060ed44 100644
--- a/src/librustc_mir/transform/no_landing_pads.rs
+++ b/src/librustc_mir/transform/no_landing_pads.rs
@@ -50,6 +50,4 @@ impl<'tcx> MirPass<'tcx> for NoLandingPads {
     }
 }
 
-impl Pass for NoLandingPads {
-    fn name(&self) -> &str { "no-landing-pads" }
-}
+impl Pass for NoLandingPads {}
diff --git a/src/librustc_mir/transform/qualify_consts.rs b/src/librustc_mir/transform/qualify_consts.rs
index 9f95342a68b..784ddc1ede4 100644
--- a/src/librustc_mir/transform/qualify_consts.rs
+++ b/src/librustc_mir/transform/qualify_consts.rs
@@ -906,9 +906,7 @@ fn qualify_const_item_cached<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
 
 pub struct QualifyAndPromoteConstants;
 
-impl Pass for QualifyAndPromoteConstants {
-    fn name(&self) -> &str { "qualify-consts" }
-}
+impl Pass for QualifyAndPromoteConstants {}
 
 impl<'tcx> MirMapPass<'tcx> for QualifyAndPromoteConstants {
     fn run_pass<'a>(&mut self,
diff --git a/src/librustc_mir/transform/simplify_branches.rs b/src/librustc_mir/transform/simplify_branches.rs
index 57f9672e2a1..f93de6ca382 100644
--- a/src/librustc_mir/transform/simplify_branches.rs
+++ b/src/librustc_mir/transform/simplify_branches.rs
@@ -57,7 +57,6 @@ impl<'l, 'tcx> MirPass<'tcx> for SimplifyBranches<'l> {
 }
 
 impl<'l> Pass for SimplifyBranches<'l> {
-    fn name(&self) -> &str { "simplify-branches" }
     fn disambiguator<'a>(&'a self) -> Option<Box<fmt::Display+'a>> {
         Some(Box::new(self.label))
     }
diff --git a/src/librustc_mir/transform/simplify_cfg.rs b/src/librustc_mir/transform/simplify_cfg.rs
index 21faf095b74..8bbcc3fe2d7 100644
--- a/src/librustc_mir/transform/simplify_cfg.rs
+++ b/src/librustc_mir/transform/simplify_cfg.rs
@@ -59,7 +59,6 @@ impl<'l, 'tcx> MirPass<'tcx> for SimplifyCfg<'l> {
 }
 
 impl<'l> Pass for SimplifyCfg<'l> {
-    fn name(&self) -> &str { "simplify-cfg" }
     fn disambiguator<'a>(&'a self) -> Option<Box<fmt::Display+'a>> {
         Some(Box::new(self.label))
     }
diff --git a/src/librustc_mir/transform/type_check.rs b/src/librustc_mir/transform/type_check.rs
index 60698a184da..e4398fcab31 100644
--- a/src/librustc_mir/transform/type_check.rs
+++ b/src/librustc_mir/transform/type_check.rs
@@ -717,6 +717,4 @@ impl Pass for TypeckMir {
     fn dep_node(&self, def_id: DefId) -> DepNode<DefId> {
         DepNode::MirTypeck(def_id)
     }
-
-    fn name(&self) -> &str { "typeck-mir" }
 }
diff --git a/src/test/run-pass-fulldeps/auxiliary/dummy_mir_pass.rs b/src/test/run-pass-fulldeps/auxiliary/dummy_mir_pass.rs
index b7d49dbb83c..604933d40a1 100644
--- a/src/test/run-pass-fulldeps/auxiliary/dummy_mir_pass.rs
+++ b/src/test/run-pass-fulldeps/auxiliary/dummy_mir_pass.rs
@@ -28,9 +28,7 @@ use rustc_plugin::Registry;
 
 struct Pass;
 
-impl transform::Pass for Pass {
-    fn name(&self) -> &str { "dummy-mir-pass" }
-}
+impl transform::Pass for Pass {}
 
 impl<'tcx> MirPass<'tcx> for Pass {
     fn run_pass<'a>(&mut self, _: TyCtxt<'a, 'tcx, 'tcx>,