ARM64: Enable shorten-64-to-32 warning

src/arm64/assembler-arm64-inl.h

 // Copyright 2013 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_ARM64_ASSEMBLER_ARM64_INL_H_
 #define V8_ARM64_ASSEMBLER_ARM64_INL_H_
 
 #include "src/arm64/assembler-arm64.h"
 #include "src/assembler.h"
 #include "src/debug.h"
@@ skipping 1066 matching lines @@
   b40 &= ImmTestBranchBit40_mask;
   return b5 | b40;
 }
 
 
 Instr Assembler::SF(Register rd) {
     return rd.Is64Bits() ? SixtyFourBits : ThirtyTwoBits;
 }
 
 
-Instr Assembler::ImmAddSub(int64_t imm) {
+Instr Assembler::ImmAddSub(int imm) {
   DCHECK(IsImmAddSub(imm));
   if (is_uint12(imm)) {  // No shift required.
-    return imm << ImmAddSub_offset;
+    imm <<= ImmAddSub_offset;
   } else {
-    return ((imm >> 12) << ImmAddSub_offset) | (1 << ShiftAddSub_offset);
+    imm = ((imm >> 12) << ImmAddSub_offset) | (1 << ShiftAddSub_offset);
   }
+  return imm;
 }
 
 
 Instr Assembler::ImmS(unsigned imms, unsigned reg_size) {
   DCHECK(((reg_size == kXRegSizeInBits) && is_uint6(imms)) ||
          ((reg_size == kWRegSizeInBits) && is_uint5(imms)));
   USE(reg_size);
   return imms << ImmS_offset;
 }
 
@@ skipping 128 matching lines @@
   return imm2 << ImmBarrierType_offset;
 }
 
 
 LSDataSize Assembler::CalcLSDataSize(LoadStoreOp op) {
   DCHECK((SizeLS_offset + SizeLS_width) == (kInstructionSize * 8));
   return static_cast<LSDataSize>(op >> SizeLS_offset);
 }
 
 
-Instr Assembler::ImmMoveWide(uint64_t imm) {
+Instr Assembler::ImmMoveWide(int imm) {
   DCHECK(is_uint16(imm));
   return imm << ImmMoveWide_offset;
 }
 
 
-Instr Assembler::ShiftMoveWide(int64_t shift) {
+Instr Assembler::ShiftMoveWide(int shift) {
   DCHECK(is_uint2(shift));
   return shift << ShiftMoveWide_offset;
 }
 
 
 Instr Assembler::FPType(FPRegister fd) {
   return fd.Is64Bits() ? FP64 : FP32;
 }
 
 
@@ skipping 34 matching lines @@
 
 
 void Assembler::ClearRecordedAstId() {
   recorded_ast_id_ = TypeFeedbackId::None();
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM64_ASSEMBLER_ARM64_INL_H_