Remove unused AllocatorTy::Bang

Author: sfackler

src/librustc_allocator/expand.rs

@@ -245,7 +245,7 @@ impl<'a> AllocFnFactory<'a> {
                 self.cx.expr_ident(self.span, ident)
             }
 
-            AllocatorTy::ResultPtr | AllocatorTy::Bang | AllocatorTy::Unit => {
+            AllocatorTy::ResultPtr | AllocatorTy::Unit => {
                 panic!("can't convert AllocatorTy to an argument")
             }
         }
@@ -262,8 +262,6 @@ impl<'a> AllocFnFactory<'a> {
                 (self.ptr_u8(), expr)
             }
 
-            AllocatorTy::Bang => (self.cx.ty(self.span, TyKind::Never), expr),
-
             AllocatorTy::Unit => (self.cx.ty(self.span, TyKind::Tup(Vec::new())), expr),
 
             AllocatorTy::Layout | AllocatorTy::Usize | AllocatorTy::Ptr => {

src/librustc_allocator/lib.rs

@@ -47,7 +47,6 @@ pub struct AllocatorMethod {
 }
 
 pub enum AllocatorTy {
-    Bang,
     Layout,
     Ptr,
     ResultPtr,

src/librustc_trans/allocator.rs

@@ -43,13 +43,11 @@ pub(crate) unsafe fn trans(tcx: TyCtxt, mods: &ModuleLlvm, kind: AllocatorKind)
                 AllocatorTy::Ptr => args.push(i8p),
                 AllocatorTy::Usize => args.push(usize),
 
-                AllocatorTy::Bang |
                 AllocatorTy::ResultPtr |
                 AllocatorTy::Unit => panic!("invalid allocator arg"),
             }
         }
         let output = match method.output {
-            AllocatorTy::Bang => None,
             AllocatorTy::ResultPtr => Some(i8p),
             AllocatorTy::Unit => None,