Revert of MIPS64: Enable shorten-64-to-32 warning.

src/compiler/mips64/code-generator-mips64.cc

Index: src/compiler/mips64/code-generator-mips64.cc
diff --git a/src/compiler/mips64/code-generator-mips64.cc b/src/compiler/mips64/code-generator-mips64.cc
index 5296ea82f7af01cb7ff304df99db54fba9017ab9..94e96d429d17047efd00661acf7c5b59565678c3 100644
--- a/src/compiler/mips64/code-generator-mips64.cc
+++ b/src/compiler/mips64/code-generator-mips64.cc
@@ -310,7 +310,7 @@
       __ Daddu(at, i.InputRegister(2), offset);                               \
       __ asm_instr(result, MemOperand(at, 0));                                \
     } else {                                                                  \
-      int offset = static_cast<int>(i.InputOperand(0).immediate());           \
+      auto offset = i.InputOperand(0).immediate();                            \
       __ Branch(ool->entry(), ls, i.InputRegister(1), Operand(offset));       \
       __ asm_instr(result, MemOperand(i.InputRegister(2), offset));           \
     }                                                                         \
@@ -328,7 +328,7 @@
       __ Daddu(at, i.InputRegister(2), offset);                               \
       __ asm_instr(result, MemOperand(at, 0));                                \
     } else {                                                                  \
-      int offset = static_cast<int>(i.InputOperand(0).immediate());           \
+      auto offset = i.InputOperand(0).immediate();                            \
       __ Branch(ool->entry(), ls, i.InputRegister(1), Operand(offset));       \
       __ asm_instr(result, MemOperand(i.InputRegister(2), offset));           \
     }                                                                         \
@@ -346,7 +346,7 @@
       __ Daddu(at, i.InputRegister(3), offset);                        \
       __ asm_instr(value, MemOperand(at, 0));                          \
     } else {                                                           \
-      int offset = static_cast<int>(i.InputOperand(0).immediate());    \
+      auto offset = i.InputOperand(0).immediate();                     \
       auto value = i.Input##width##Register(2);                        \
       __ Branch(&done, ls, i.InputRegister(1), Operand(offset));       \
       __ asm_instr(value, MemOperand(i.InputRegister(3), offset));     \
@@ -365,7 +365,7 @@
       __ Daddu(at, i.InputRegister(3), offset);                        \
       __ asm_instr(value, MemOperand(at, 0));                          \
     } else {                                                           \
-      int offset = static_cast<int>(i.InputOperand(0).immediate());    \
+      auto offset = i.InputOperand(0).immediate();                     \
       auto value = i.InputRegister(2);                                 \
       __ Branch(&done, ls, i.InputRegister(1), Operand(offset));       \
       __ asm_instr(value, MemOperand(i.InputRegister(3), offset));     \
@@ -559,27 +559,24 @@
       if (instr->InputAt(1)->IsRegister()) {
         __ sllv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
-        __ sll(i.OutputRegister(), i.InputRegister(0),
-               static_cast<uint16_t>(imm));
+        int32_t imm = i.InputOperand(1).immediate();
+        __ sll(i.OutputRegister(), i.InputRegister(0), imm);
       }
       break;
     case kMips64Shr:
       if (instr->InputAt(1)->IsRegister()) {
         __ srlv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
-        __ srl(i.OutputRegister(), i.InputRegister(0),
-               static_cast<uint16_t>(imm));
+        int32_t imm = i.InputOperand(1).immediate();
+        __ srl(i.OutputRegister(), i.InputRegister(0), imm);
       }
       break;
     case kMips64Sar:
       if (instr->InputAt(1)->IsRegister()) {
         __ srav(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
-        __ sra(i.OutputRegister(), i.InputRegister(0),
-               static_cast<uint16_t>(imm));
+        int32_t imm = i.InputOperand(1).immediate();
+        __ sra(i.OutputRegister(), i.InputRegister(0), imm);
       }
       break;
     case kMips64Ext:
@@ -594,13 +591,11 @@
       if (instr->InputAt(1)->IsRegister()) {
         __ dsllv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
+        int32_t imm = i.InputOperand(1).immediate();
         if (imm < 32) {
-          __ dsll(i.OutputRegister(), i.InputRegister(0),
-                  static_cast<uint16_t>(imm));
+          __ dsll(i.OutputRegister(), i.InputRegister(0), imm);
         } else {
-          __ dsll32(i.OutputRegister(), i.InputRegister(0),
-                    static_cast<uint16_t>(imm - 32));
+          __ dsll32(i.OutputRegister(), i.InputRegister(0), imm - 32);
         }
       }
       break;
@@ -608,13 +603,11 @@
       if (instr->InputAt(1)->IsRegister()) {
         __ dsrlv(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
+        int32_t imm = i.InputOperand(1).immediate();
         if (imm < 32) {
-          __ dsrl(i.OutputRegister(), i.InputRegister(0),
-                  static_cast<uint16_t>(imm));
+          __ dsrl(i.OutputRegister(), i.InputRegister(0), imm);
         } else {
-          __ dsrl32(i.OutputRegister(), i.InputRegister(0),
-                    static_cast<uint16_t>(imm - 32));
+          __ dsrl32(i.OutputRegister(), i.InputRegister(0), imm - 32);
         }
       }
       break;
@@ -622,7 +615,7 @@
       if (instr->InputAt(1)->IsRegister()) {
         __ dsrav(i.OutputRegister(), i.InputRegister(0), i.InputRegister(1));
       } else {
-        int64_t imm = i.InputOperand(1).immediate();
+        int32_t imm = i.InputOperand(1).immediate();
         if (imm < 32) {
           __ dsra(i.OutputRegister(), i.InputRegister(0), imm);
         } else {
@@ -1103,7 +1096,7 @@
   Label here;
 
   __ Branch(GetLabel(i.InputRpo(1)), hs, input, Operand(case_count));
-  __ BlockTrampolinePoolFor(static_cast<int>(case_count) * 2 + 7);
+  __ BlockTrampolinePoolFor(case_count * 2 + 7);
   // Ensure that dd-ed labels use 8 byte aligned addresses.
   if ((masm()->pc_offset() & 7) != 0) {
     __ nop();