rustc: remove redundant fn_id's from CodeExtentData.

src/librustc/ich/impls_ty.rs

@@ -441,9 +441,8 @@ fn hash_stable<W: StableHasherResult>(&self,
             CodeExtentData::DestructionScope(node_id) => {
                 node_id.hash_stable(hcx, hasher);
             }
-            CodeExtentData::CallSiteScope { fn_id, body_id } |
-            CodeExtentData::ParameterScope { fn_id, body_id } => {
-                fn_id.hash_stable(hcx, hasher);
+            CodeExtentData::CallSiteScope(body_id) |
+            CodeExtentData::ParameterScope(body_id) => {
                 body_id.hash_stable(hcx, hasher);
             }
             CodeExtentData::Remainder(block_remainder) => {

src/librustc/infer/error_reporting/mod.rs

@@ -153,10 +153,10 @@ fn explain_span<'a, 'gcx, 'tcx>(tcx: TyCtxt<'a, 'gcx, 'tcx>,
                 };
                 let scope_decorated_tag = match *scope {
                     region::CodeExtentData::Misc(_) => tag,
-                    region::CodeExtentData::CallSiteScope { .. } => {
+                    region::CodeExtentData::CallSiteScope(_) => {
                         "scope of call-site for function"
                     }
-                    region::CodeExtentData::ParameterScope { .. } => {
+                    region::CodeExtentData::ParameterScope(_) => {
                         "scope of function body"
                     }
                     region::CodeExtentData::DestructionScope(_) => {

src/librustc/middle/region.rs

@@ -107,11 +107,11 @@ pub enum CodeExtentData {
 
     // extent of the call-site for a function or closure (outlives
     // the parameters as well as the body).
-    CallSiteScope { fn_id: ast::NodeId, body_id: ast::NodeId },
+    CallSiteScope(hir::BodyId),
 
     // extent of parameters passed to a function or closure (they
     // outlive its body)
-    ParameterScope { fn_id: ast::NodeId, body_id: ast::NodeId },
+    ParameterScope(hir::BodyId),
 
     // extent of destructors for temporaries of node-id
     DestructionScope(ast::NodeId),
@@ -157,8 +157,8 @@ pub fn node_id(&self) -> ast::NodeId {
             // precise extent denoted by `self`.
             CodeExtentData::Remainder(br) => br.block,
             CodeExtentData::DestructionScope(node_id) => node_id,
-            CodeExtentData::CallSiteScope { fn_id: _, body_id } |
-            CodeExtentData::ParameterScope { fn_id: _, body_id } => body_id,
+            CodeExtentData::CallSiteScope(body_id) |
+            CodeExtentData::ParameterScope(body_id) => body_id.node_id,
         }
     }
 
@@ -169,8 +169,8 @@ pub fn span(&self, hir_map: &hir_map::Map) -> Option<Span> {
         match hir_map.find(self.node_id()) {
             Some(hir_map::NodeBlock(ref blk)) => {
                 match *self {
-                    CodeExtentData::CallSiteScope { .. } |
-                    CodeExtentData::ParameterScope { .. } |
+                    CodeExtentData::CallSiteScope(_) |
+                    CodeExtentData::ParameterScope(_) |
                     CodeExtentData::Misc(_) |
                     CodeExtentData::DestructionScope(_) => Some(blk.span),
 
@@ -627,10 +627,7 @@ pub fn early_free_extent<'a, 'gcx>(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>,
             self.root_body.unwrap()
         });
 
-        tcx.intern_code_extent(CodeExtentData::CallSiteScope {
-            fn_id: tcx.hir.body_owner(body_id),
-            body_id: body_id.node_id
-        })
+        tcx.intern_code_extent(CodeExtentData::CallSiteScope(body_id))
     }
 
     /// Assuming that the provided region was defined within this `RegionMaps`,
@@ -651,10 +648,7 @@ pub fn free_extent<'a, 'gcx>(&self, tcx: TyCtxt<'a, 'gcx, 'tcx>, fr: &ty::FreeRe
         let param_owner_id = tcx.hir.as_local_node_id(param_owner).unwrap();
         let body_id = tcx.hir.body_owned_by(param_owner_id);
 
-        tcx.intern_code_extent(CodeExtentData::CallSiteScope {
-            fn_id: tcx.hir.body_owner(body_id),
-            body_id: body_id.node_id
-        })
+        tcx.intern_code_extent(CodeExtentData::CallSiteScope(body_id))
     }
 }
 
@@ -1172,9 +1166,9 @@ fn visit_body(&mut self, body: &'tcx hir::Body) {
         self.cx.root_id = Some(body_id.node_id);
 
         self.cx.parent = Some(self.new_code_extent(
-            CodeExtentData::CallSiteScope { fn_id: owner_id, body_id: body_id.node_id }));
+            CodeExtentData::CallSiteScope(body_id)));
         self.cx.parent = Some(self.new_code_extent(
-            CodeExtentData::ParameterScope { fn_id: owner_id, body_id: body_id.node_id }));
+            CodeExtentData::ParameterScope(body_id)));
 
         // The arguments and `self` are parented to the fn.
         self.cx.var_parent = self.cx.parent.take();

src/librustc/ty/context.rs

@@ -656,17 +656,13 @@ pub fn node_extent(self, n: ast::NodeId) -> CodeExtent<'gcx> {
     }
 
     pub fn call_site_extent(self, fn_id: ast::NodeId) -> CodeExtent<'gcx> {
-        self.intern_code_extent(CodeExtentData::CallSiteScope {
-            fn_id,
-            body_id: self.hir.body_owned_by(fn_id).node_id
-        })
+        self.intern_code_extent(CodeExtentData::CallSiteScope(
+            self.hir.body_owned_by(fn_id)))
     }
 
     pub fn parameter_extent(self, fn_id: ast::NodeId) -> CodeExtent<'gcx> {
-        self.intern_code_extent(CodeExtentData::ParameterScope {
-            fn_id,
-            body_id: self.hir.body_owned_by(fn_id).node_id
-        })
+        self.intern_code_extent(CodeExtentData::ParameterScope(
+            self.hir.body_owned_by(fn_id)))
     }
 
     pub fn intern_code_extent(self, data: CodeExtentData) -> CodeExtent<'gcx> {

src/librustc_mir/build/scope.rs

@@ -416,7 +416,7 @@ pub fn extent_of_return_scope(&self) -> CodeExtent<'tcx> {
         // We want `scopes[1]`, which is the `ParameterScope`.
         assert!(self.scopes.len() >= 2);
         assert!(match *self.scopes[1].extent {
-            CodeExtentData::ParameterScope { .. } => true,
+            CodeExtentData::ParameterScope(_) => true,
             _ => false,
         });
         self.scopes[1].extent