[turbofan] Switch passing of new.target to register.

src/arm64/macro-assembler-arm64.cc

 // 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 2533 matching lines @@
       }
     } else {
       Jump(adaptor, RelocInfo::CODE_TARGET);
     }
   }
   Bind(&regular_invoke);
 }
 
 
 void MacroAssembler::InvokeCode(Register code,
+                                Register new_target,
                                 const ParameterCount& expected,
                                 const ParameterCount& actual,
                                 InvokeFlag flag,
                                 const CallWrapper& call_wrapper) {
   // You can't call a function without a valid frame.
   DCHECK(flag == JUMP_FUNCTION || has_frame());
 
+  // Ensure new target is passed in the correct register. Otherwise clear the
+  // appropriate register in case new target is not given.
+  DCHECK_IMPLIES(new_target.is_valid(), new_target.is(x3));
+  if (!new_target.is_valid()) {
+    LoadRoot(x3, Heap::kUndefinedValueRootIndex);
+  }
+
   Label done;
-
   bool definitely_mismatches = false;
   InvokePrologue(expected, actual, &done, flag, &definitely_mismatches,
                  call_wrapper);
 
   // If we are certain that actual != expected, then we know InvokePrologue will
   // have handled the call through the argument adaptor mechanism.
   // The called function expects the call kind in x5.
   if (!definitely_mismatches) {
     if (flag == CALL_FUNCTION) {
       call_wrapper.BeforeCall(CallSize(code));
       Call(code);
       call_wrapper.AfterCall();
     } else {
       DCHECK(flag == JUMP_FUNCTION);
       Jump(code);
     }
   }
 
   // Continue here if InvokePrologue does handle the invocation due to
   // mismatched parameter counts.
   Bind(&done);
 }
 
 
 void MacroAssembler::InvokeFunction(Register function,
+                                    Register new_target,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper) {
   // You can't call a function without a valid frame.
   DCHECK(flag == JUMP_FUNCTION || has_frame());
 
   // Contract with called JS functions requires that function is passed in x1.
   // (See FullCodeGenerator::Generate().)
   DCHECK(function.is(x1));
 
   Register expected_reg = x2;
-  Register code_reg = x3;
+  Register code_reg = x4;
 
   Ldr(cp, FieldMemOperand(function, JSFunction::kContextOffset));
   // The number of arguments is stored as an int32_t, and -1 is a marker
   // (SharedFunctionInfo::kDontAdaptArgumentsSentinel), so we need sign
   // extension to correctly handle it.
   Ldr(expected_reg, FieldMemOperand(function,
                                     JSFunction::kSharedFunctionInfoOffset));
   Ldrsw(expected_reg,
         FieldMemOperand(expected_reg,
                         SharedFunctionInfo::kFormalParameterCountOffset));
   Ldr(code_reg,
       FieldMemOperand(function, JSFunction::kCodeEntryOffset));
 
   ParameterCount expected(expected_reg);
-  InvokeCode(code_reg, expected, actual, flag, call_wrapper);
+  InvokeCode(code_reg, new_target, expected, actual, flag, call_wrapper);
 }
 
 
 void MacroAssembler::InvokeFunction(Register function,
                                     const ParameterCount& expected,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper) {
   // You can't call a function without a valid frame.
   DCHECK(flag == JUMP_FUNCTION || has_frame());
 
   // Contract with called JS functions requires that function is passed in x1.
   // (See FullCodeGenerator::Generate().)
   DCHECK(function.Is(x1));
 
-  Register code_reg = x3;
+  Register code_reg = x4;
 
   // Set up the context.
   Ldr(cp, FieldMemOperand(function, JSFunction::kContextOffset));
 
   // We call indirectly through the code field in the function to
   // allow recompilation to take effect without changing any of the
   // call sites.
   Ldr(code_reg, FieldMemOperand(function, JSFunction::kCodeEntryOffset));
-  InvokeCode(code_reg, expected, actual, flag, call_wrapper);
+  InvokeCode(code_reg, no_reg, expected, actual, flag, call_wrapper);
 }
 
 
 void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
                                     const ParameterCount& expected,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper) {
   // Contract with called JS functions requires that function is passed in x1.
   // (See FullCodeGenerator::Generate().)
@@ skipping 2413 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64