Add UnwindAction::Terminate

compiler/rustc_codegen_ssa/src/mir/mod.rs

@@ -74,7 +74,7 @@ pub struct FunctionCx<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>> {
     unreachable_block: Option<Bx::BasicBlock>,
 
     /// Cached double unwind guarding block
-    double_unwind_guard: Option<Bx::BasicBlock>,
+    terminate_block: Option<Bx::BasicBlock>,
 
     /// The location where each MIR arg/var/tmp/ret is stored. This is
     /// usually an `PlaceRef` representing an alloca, but not always:
@@ -189,7 +189,7 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
         personality_slot: None,
         cached_llbbs,
         unreachable_block: None,
-        double_unwind_guard: None,
+        terminate_block: None,
         cleanup_kinds,
         landing_pads: IndexVec::from_elem(None, &mir.basic_blocks),
         funclets: IndexVec::from_fn_n(|_| None, mir.basic_blocks.len()),