incr.comp.: Remove unused DepKind::WorkProduct.

src/librustc/dep_graph/dep_node.rs

@@ -459,10 +459,6 @@ define_dep_nodes!( <'tcx>
     // Represents metadata from an extern crate.
     [input] CrateMetadata(CrateNum),
 
-    // Represents some artifact that we save to disk. Note that these
-    // do not have a def-id as part of their identifier.
-    [] WorkProduct(WorkProductId),
-
     // Represents different phases in the compiler.
     [] RegionScopeTree(DefId),
     [eval_always] Coherence,
@@ -781,13 +777,6 @@ impl WorkProductId {
             hash: fingerprint
         }
     }
-
-    pub fn to_dep_node(self) -> DepNode {
-        DepNode {
-            kind: DepKind::WorkProduct,
-            hash: self.hash,
-        }
-    }
 }
 
 impl_stable_hash_for!(struct ::dep_graph::WorkProductId {

src/librustc/ty/maps/plumbing.rs

@@ -721,9 +721,8 @@ pub fn force_from_dep_node<'a, 'gcx, 'lcx>(tcx: TyCtxt<'a, 'gcx, 'lcx>,
         DepKind::EraseRegionsTy |
         DepKind::NormalizeTy |
 
-        // These are just odd
-        DepKind::Null |
-        DepKind::WorkProduct => {
+        // This one should never occur in this context
+        DepKind::Null => {
             bug!("force_from_dep_node() - Encountered {:?}", dep_node.kind)
         }
 

src/librustc_trans/partitioning.rs

@@ -104,7 +104,7 @@
 
 use collector::InliningMap;
 use common;
-use rustc::dep_graph::{DepNode, WorkProductId};
+use rustc::dep_graph::WorkProductId;
 use rustc::hir::def_id::DefId;
 use rustc::hir::map::DefPathData;
 use rustc::middle::trans::{Linkage, Visibility};
@@ -147,10 +147,6 @@ pub trait CodegenUnitExt<'tcx> {
         WorkProductId::from_cgu_name(self.name())
     }
 
-    fn work_product_dep_node(&self) -> DepNode {
-        self.work_product_id().to_dep_node()
-    }
-
     fn items_in_deterministic_order<'a>(&self,
                                         tcx: TyCtxt<'a, 'tcx, 'tcx>)
                                         -> Vec<(TransItem<'tcx>,
@@ -253,14 +249,6 @@ pub fn partition<'a, 'tcx, I>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         cgu1.name().cmp(cgu2.name())
     });
 
-    if tcx.sess.opts.enable_dep_node_debug_strs() {
-        for cgu in &result {
-            let dep_node = cgu.work_product_dep_node();
-            tcx.dep_graph.register_dep_node_debug_str(dep_node,
-                                                            || cgu.name().to_string());
-        }
-    }
-
     result
 }