[codegen/optimize_dce.cpp] fixed bugs whereby barriers were removed by DCE

2019-07-31 15:11:10 -07:00
parent 5af7e5adac
commit bb32ac56c9
8 changed files with 60 additions and 17 deletions
--- a/lib/codegen/selection.cpp
+++ b/lib/codegen/selection.cpp
@@ -368,6 +368,8 @@ Instruction *selection::llvm_inst(ir::instruction *inst, std::function<Value*(ir
    Value *res = builder.CreateAtomicRMW(AtomicRMWInst::Xchg, rmw_ptr, rmw_val, AtomicOrdering::Monotonic, SyncScope::System);
    builder.CreateBr(tid_0_done_bb);
    builder.SetInsertPoint(tid_0_done_bb);
+    tgt_->add_memfence(module, builder);
+    tgt_->add_barrier(module, builder);
    return (Instruction*)res;
  }
  if(ir::atomic_add_inst* ii = dynamic_cast<ir::atomic_add_inst*>(inst)){