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

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

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 84acda4db38fac8f89304b1615ebd4e6c15ac4d2..14603863b18c7ff074d3d99966421b84ce5dd00d 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -1038,6 +1038,7 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
       // Pseudo instructions turned into tbz/tbnz in AssembleArchBranch.
       break;
     case kArm64CompareAndBranch32:
+    case kArm64CompareAndBranch:
       // Pseudo instruction turned into cbz/cbnz in AssembleArchBranch.
       break;
     case kArm64ClaimCSP: {
@@ -1503,6 +1504,17 @@ void CodeGenerator::AssembleArchBranch(Instruction* instr, BranchInfo* branch) {
       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: