1 files changed, 42 insertions, 0 deletions
diff --git a/src/ir/intrinsics.cpp b/src/ir/intrinsics.cpp
new file mode 100644
index 000000000..c2318cabf
--- /dev/null
+++ b/src/ir/intrinsics.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 WebAssembly Community Group participants
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "ir/intrinsics.h"
+#include "wasm-builder.h"
+
+namespace wasm {
+
+static Name BinaryenIntrinsics("binaryen-intrinsics"),
+  CallWithoutEffects("call.without.effects");
+
+bool Intrinsics::isCallWithoutEffects(Function* func) {
+  return func->module == BinaryenIntrinsics && func->base == CallWithoutEffects;
+}
+
+Call* Intrinsics::isCallWithoutEffects(Expression* curr) {
+  if (auto* call = curr->dynCast<Call>()) {
+    // The target function may not exist if the module is still being
+    // constructed.
+    if (auto* func = module.getFunctionOrNull(call->target)) {
+      if (isCallWithoutEffects(func)) {
+        return call;
+      }
+    }
+  }
+  return nullptr;
+}
+
+} // namespace wasm