[interpreter] Fix U16 macro in test-bytecode-generator.cc.

test/cctest/interpreter/test-bytecode-generator.cc

Index: test/cctest/interpreter/test-bytecode-generator.cc
diff --git a/test/cctest/interpreter/test-bytecode-generator.cc b/test/cctest/interpreter/test-bytecode-generator.cc
index 2f547721abd82aa375d34d877eaa9655d642a8da..984ea496b4e23fbf67eb7fec5fccf94edbe20d5f 100644
--- a/test/cctest/interpreter/test-bytecode-generator.cc
+++ b/test/cctest/interpreter/test-bytecode-generator.cc
@@ -81,17 +81,21 @@ class BytecodeGeneratorHelper {
 
 
 // Helper macros for handcrafting bytecode sequences.
+int u16_temp;
+
 #define B(x) static_cast<uint8_t>(Bytecode::k##x)
 #define U8(x) static_cast<uint8_t>((x) & 0xff)
 #define R(x) static_cast<uint8_t>(-(x) & 0xff)
 #define A(x, n) R(helper.kLastParamIndex - (n) + 1 + (x))
 #define THIS(n) A(0, n)
 #if defined(V8_TARGET_LITTLE_ENDIAN)
-#define U16(x) static_cast<uint8_t>((x) & 0xff),                    \
-               static_cast<uint8_t>(((x) >> kBitsPerByte) & 0xff)
+#define U16(x)                                   \
+  static_cast<uint8_t>((u16_temp = (x)) & 0xff), \
+      static_cast<uint8_t>(((u16_temp) >> kBitsPerByte) & 0xff)
 #elif defined(V8_TARGET_BIG_ENDIAN)
-#define U16(x) static_cast<uint8_t>(((x) >> kBitsPerByte) & 0xff),   \
-               static_cast<uint8_t>((x) & 0xff)
+#define U16(x)                                                     \
+  static_cast<uint8_t>(((u16_temp = (x)) >> kBitsPerByte) & 0xff), \
+      static_cast<uint8_t>((u16_temp)&0xff)
 #else
 #error Unknown byte ordering
 #endif