From e9a8b9edd478c255cc80d5d04516470640f54a89 Mon Sep 17 00:00:00 2001
From: Ye Kuang <yekuang.ky@gmail.com>
Date: Thu, 16 Jan 2020 09:11:57 +0900
Subject: [PATCH] add and

---
 taichi/transforms/simplify.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/taichi/transforms/simplify.cpp b/taichi/transforms/simplify.cpp
index 1f6c6ad8294a75..584bd791826e13 100644
--- a/taichi/transforms/simplify.cpp
+++ b/taichi/transforms/simplify.cpp
@@ -840,7 +840,7 @@ class BasicBlockSimplify : public IRVisitor {
             clause[i]->is<LocalStoreStmt>() || !has_side_effects) {
           // This stmt can be kept.
         } else if (clause[i]->is<AtomicOpStmt>()) {
-          plain_clause = !is_atomic_value_used(clause, i);
+          plain_clause = plain_clause && !is_atomic_value_used(clause, i);
         } else {
           plain_clause = false;
         }