[wasm] Add I64Eqz operator.

test/unittests/wasm/wasm-macro-gen-unittest.cc

Index: test/unittests/wasm/wasm-macro-gen-unittest.cc
diff --git a/test/unittests/wasm/wasm-macro-gen-unittest.cc b/test/unittests/wasm/wasm-macro-gen-unittest.cc
index ed2fee65d01b5324f9020c95b2b4bb861b02d818..ec188c00c9af7624e65b30c3430ceef9c8135e11 100644
--- a/test/unittests/wasm/wasm-macro-gen-unittest.cc
+++ b/test/unittests/wasm/wasm-macro-gen-unittest.cc
@@ -185,6 +185,8 @@ TEST_F(WasmMacroGenTest, Int32Ops) {
   EXPECT_SIZE(3, WASM_I32_CLZ(WASM_ZERO));
   EXPECT_SIZE(3, WASM_I32_CTZ(WASM_ZERO));
   EXPECT_SIZE(3, WASM_I32_POPCNT(WASM_ZERO));
+
+  EXPECT_SIZE(3, WASM_I32_EQZ(WASM_ZERO));
 }
 
 
@@ -219,6 +221,8 @@ TEST_F(WasmMacroGenTest, Int64Ops) {
   EXPECT_SIZE(3, WASM_I64_CLZ(WASM_ZERO));
   EXPECT_SIZE(3, WASM_I64_CTZ(WASM_ZERO));
   EXPECT_SIZE(3, WASM_I64_POPCNT(WASM_ZERO));
+
+  EXPECT_SIZE(3, WASM_I64_EQZ(WASM_ZERO));
 }