diff options
| -rw-r--r-- | compiler/rustc_codegen_ssa/src/mir/mod.rs | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/compiler/rustc_codegen_ssa/src/mir/mod.rs b/compiler/rustc_codegen_ssa/src/mir/mod.rs index e2edd448267..581860ee8b5 100644 --- a/compiler/rustc_codegen_ssa/src/mir/mod.rs +++ b/compiler/rustc_codegen_ssa/src/mir/mod.rs @@ -152,20 +152,11 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( } let cleanup_kinds = analyze::cleanup_kinds(&mir); - // Allocate a `Block` for every basic block, except - // the start block, if nothing loops back to it. - let reentrant_start_block = !mir.predecessors()[mir::START_BLOCK].is_empty(); - let cached_llbbs: IndexVec<mir::BasicBlock, Option<Bx::BasicBlock>> = - mir.basic_blocks() - .indices() - .map(|bb| { - if bb == mir::START_BLOCK && !reentrant_start_block { - Some(start_llbb) - } else { - None - } - }) - .collect(); + let cached_llbbs: IndexVec<mir::BasicBlock, Option<Bx::BasicBlock>> = mir + .basic_blocks() + .indices() + .map(|bb| if bb == mir::START_BLOCK { Some(start_llbb) } else { None }) + .collect(); let mut fx = FunctionCx { instance, @@ -247,11 +238,6 @@ pub fn codegen_mir<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>( // Apply debuginfo to the newly allocated locals. fx.debug_introduce_locals(&mut bx); - // Branch to the START block, if it's not the entry block. - if reentrant_start_block { - bx.br(fx.llbb(mir::START_BLOCK)); - } - // Codegen the body of each block using reverse postorder // FIXME(eddyb) reuse RPO iterator between `analysis` and this. for (bb, _) in traversal::reverse_postorder(&mir) { |