Auto merge of #36601 - jseyfried:build_reduced_graph_in_expansion, r=nrc

Assign def ids and build the module graph during expansion

r? @nrc

src/test/codegen-units/item-collection/overloaded-operators.rs

@@ -45,8 +45,8 @@ impl IndexMut<usize> for Indexable {
 }
 
 
-//~ TRANS_ITEM fn overloaded_operators::{{impl}}[2]::eq[0]
-//~ TRANS_ITEM fn overloaded_operators::{{impl}}[2]::ne[0]
+//~ TRANS_ITEM fn overloaded_operators::{{impl}}[4]::eq[0]
+//~ TRANS_ITEM fn overloaded_operators::{{impl}}[4]::ne[0]
 #[derive(PartialEq)]
 pub struct Equatable(u32);
 
@@ -54,7 +54,7 @@ pub struct Equatable(u32);
 impl Add<u32> for Equatable {
     type Output = u32;
 
-    //~ TRANS_ITEM fn overloaded_operators::{{impl}}[3]::add[0]
+    //~ TRANS_ITEM fn overloaded_operators::{{impl}}[2]::add[0]
     fn add(self, rhs: u32) -> u32 {
         self.0 + rhs
     }
@@ -63,7 +63,7 @@ impl Add<u32> for Equatable {
 impl Deref for Equatable {
     type Target = u32;
 
-    //~ TRANS_ITEM fn overloaded_operators::{{impl}}[4]::deref[0]
+    //~ TRANS_ITEM fn overloaded_operators::{{impl}}[3]::deref[0]
     fn deref(&self) -> &Self::Target {
         &self.0
     }

src/test/compile-fail-fulldeps/derive-no-std-not-supported.rs

@@ -10,7 +10,6 @@
 
 #![no_std]
 
-extern crate core;
 extern crate rand;
 extern crate serialize as rustc_serialize;
 

src/test/compile-fail/gated-non-ascii-idents.rs

@@ -8,7 +8,7 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-extern crate bäz; //~ ERROR non-ascii idents
+extern crate core as bäz; //~ ERROR non-ascii idents
 
 use föö::bar; //~ ERROR non-ascii idents
 

src/test/compile-fail/self_type_keyword.rs

@@ -38,11 +38,17 @@ pub fn main() {
     }
 }
 
-use std::option::Option as Self;
-//~^ ERROR expected identifier, found keyword `Self`
+mod m1 {
+    extern crate core as Self;
+    //~^ ERROR expected identifier, found keyword `Self`
+}
 
-extern crate Self;
-//~^ ERROR expected identifier, found keyword `Self`
+mod m2 {
+    use std::option::Option as Self;
+    //~^ ERROR expected identifier, found keyword `Self`
+}
 
-trait Self {}
-//~^ ERROR expected identifier, found keyword `Self`
+mod m3 {
+    trait Self {}
+    //~^ ERROR expected identifier, found keyword `Self`
+}