S390X: [turbofan] Word32 loads should be unsigned.

src/compiler/s390/instruction-codes-s390.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_S390_INSTRUCTION_CODES_S390_H_
 #define V8_COMPILER_S390_INSTRUCTION_CODES_S390_H_
 
 namespace v8 {
 namespace internal {
 namespace compiler {
@@ skipping 108 matching lines @@
   V(S390_DoubleConstruct)          \
   V(S390_BitcastInt32ToFloat32)    \
   V(S390_BitcastFloat32ToInt32)    \
   V(S390_BitcastInt64ToDouble)     \
   V(S390_BitcastDoubleToInt64)     \
   V(S390_LoadWordS8)               \
   V(S390_LoadWordU8)               \
   V(S390_LoadWordS16)              \
   V(S390_LoadWordU16)              \
   V(S390_LoadWordS32)              \
+  V(S390_LoadWordU32)              \
   V(S390_LoadWord64)               \
   V(S390_LoadFloat32)              \
   V(S390_LoadDouble)               \
   V(S390_StoreWord8)               \
   V(S390_StoreWord16)              \
   V(S390_StoreWord32)              \
   V(S390_StoreWord64)              \
   V(S390_StoreFloat32)             \
   V(S390_StoreDouble)
 
@@ skipping 12 matching lines @@
 // MRR = [register + register]
 #define TARGET_ADDRESSING_MODE_LIST(V) \
   V(MRI) /* [%r0 + K] */               \
   V(MRR) /* [%r0 + %r1] */
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_S390_INSTRUCTION_CODES_S390_H_