s390: Allow larger Operands/Displacements/Offsets in s390

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

Index: src/compiler/s390/code-generator-s390.cc
diff --git a/src/compiler/s390/code-generator-s390.cc b/src/compiler/s390/code-generator-s390.cc
index d2d6a17746f4c5a653e1a2c936a019c091038a6a..ffd962e9f1ef3581f83edfbb52f19b2b3b969871 100644
--- a/src/compiler/s390/code-generator-s390.cc
+++ b/src/compiler/s390/code-generator-s390.cc
@@ -71,12 +71,19 @@ class S390OperandConverter final : public InstructionOperandConverter {
     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);