[turbofan] ARM64: Match 64 bit compare with zero and branch

src/compiler/arm64/code-generator-arm64.cc

 // Copyright 2014 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/arm64/frames-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 1020 matching lines @@
       break;
     case kArm64Bfi:
       __ Bfi(i.OutputRegister(), i.InputRegister(1), i.InputInt6(2),
              i.InputInt6(3));
       break;
     case kArm64TestAndBranch32:
     case kArm64TestAndBranch:
       // Pseudo instructions turned into tbz/tbnz in AssembleArchBranch.
       break;
     case kArm64CompareAndBranch32:
+    case kArm64CompareAndBranch:
       // Pseudo instruction turned into cbz/cbnz in AssembleArchBranch.
       break;
     case kArm64ClaimCSP: {
       int count = RoundUp(i.InputInt32(0), 2);
       Register prev = __ StackPointer();
       if (prev.Is(jssp)) {
         // TODO(titzer): make this a macro-assembler method.
         // Align the CSP and store the previous JSSP on the stack.
         UseScratchRegisterScope scope(masm());
         Register tmp = scope.AcquireX();
@@ skipping 445 matching lines @@
     switch (condition) {
       case kEqual:
         __ Cbz(i.InputRegister32(0), tlabel);
         break;
       case kNotEqual:
         __ Cbnz(i.InputRegister32(0), tlabel);
         break;
       default:
         UNREACHABLE();
     }
+  } else if (opcode == kArm64CompareAndBranch) {
+    switch (condition) {
+      case kEqual:
+        __ Cbz(i.InputRegister64(0), tlabel);
+        break;
+      case kNotEqual:
+        __ Cbnz(i.InputRegister64(0), tlabel);
+        break;
+      default:
+        UNREACHABLE();
+    }
   } else if (opcode == kArm64TestAndBranch32) {
     switch (condition) {
       case kEqual:
         __ Tbz(i.InputRegister32(0), i.InputInt5(1), tlabel);
         break;
       case kNotEqual:
         __ Tbnz(i.InputRegister32(0), i.InputInt5(1), tlabel);
         break;
       default:
         UNREACHABLE();
@@ skipping 389 matching lines @@
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8