s390: Allow larger Operands/Displacements/Offsets in s390

src/compiler/s390/code-generator-s390.cc

 // 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.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
 #include "src/compiler/gap-resolver.h"
 #include "src/compiler/node-matchers.h"
@@ skipping 53 matching lines @@
     UNREACHABLE();
     return Operand::Zero();
   }
 
   MemOperand MemoryOperand(AddressingMode* mode, size_t* first_index) {
     const size_t index = *first_index;
     if (mode) *mode = AddressingModeField::decode(instr_->opcode());
     switch (AddressingModeField::decode(instr_->opcode())) {
       case kMode_None:
         break;
+      case kMode_MR:
+        *first_index += 1;
+        return MemOperand(InputRegister(index + 0), 0);
       case kMode_MRI:
         *first_index += 2;
         return MemOperand(InputRegister(index + 0), InputInt32(index + 1));
       case kMode_MRR:
         *first_index += 2;
         return MemOperand(InputRegister(index + 0), InputRegister(index + 1));
+      case kMode_MRRI:
+        *first_index += 3;
+        return MemOperand(InputRegister(index + 0), InputRegister(index + 1),
+                          InputInt32(index + 2));
     }
     UNREACHABLE();
     return MemOperand(r0);
   }
 
   MemOperand MemoryOperand(AddressingMode* mode = NULL,
                            size_t first_index = 0) {
     return MemoryOperand(mode, &first_index);
   }
 
@@ skipping 2275 matching lines @@
       padding_size -= 2;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8