[WASM SIMD] Replace primitive shuffles with general Shuffle.

test/unittests/wasm/function-body-decoder-unittest.cc

Index: test/unittests/wasm/function-body-decoder-unittest.cc
diff --git a/test/unittests/wasm/function-body-decoder-unittest.cc b/test/unittests/wasm/function-body-decoder-unittest.cc
index f3ff6a56eca07ed25ba3dd16df39408d3962ff34..bc67d31dc19c42b98f101c52c6c8ee3dda0d8757 100644
--- a/test/unittests/wasm/function-body-decoder-unittest.cc
+++ b/test/unittests/wasm/function-body-decoder-unittest.cc
@@ -2635,6 +2635,10 @@ TEST_F(WasmOpcodeLengthTest, SimdExpressions) {
   EXPECT_LENGTH_N(3, kSimdPrefix, static_cast<byte>(kExpr##name & 0xff));
   FOREACH_SIMD_1_OPERAND_OPCODE(TEST_SIMD)
 #undef TEST_SIMD
+  EXPECT_LENGTH_N(6, kSimdPrefix, static_cast<byte>(kExprS32x4Shuffle & 0xff));
+  EXPECT_LENGTH_N(10, kSimdPrefix, static_cast<byte>(kExprS16x8Shuffle & 0xff));
+  EXPECT_LENGTH_N(18, kSimdPrefix, static_cast<byte>(kExprS8x16Shuffle & 0xff));
+#undef TEST_SIMD
   // test for bad simd opcode
   EXPECT_LENGTH_N(2, kSimdPrefix, 0xff);
 }