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

src/mips64/macro-assembler-mips64.cc

 // Copyright 2012 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 <limits.h>  // For LONG_MIN, LONG_MAX.
 
 #if V8_TARGET_ARCH_MIPS64
 
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
@@ skipping 4236 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(a3));
+  if (!new_target.is_valid()) {
+    LoadRoot(a3, Heap::kUndefinedValueRootIndex);
+  }
+
   Label done;
-
   bool definitely_mismatches = false;
   InvokePrologue(expected, actual, &done, &definitely_mismatches, flag,
                  call_wrapper);
   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 a1.
   DCHECK(function.is(a1));
   Register expected_reg = a2;
-  Register code_reg = a3;
+  Register code_reg = t0;
   ld(code_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   ld(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
   // The argument count is stored as int32_t on 64-bit platforms.
   // TODO(plind): Smi on 32-bit platforms.
   lw(expected_reg,
       FieldMemOperand(code_reg,
                       SharedFunctionInfo::kFormalParameterCountOffset));
   ld(code_reg, FieldMemOperand(a1, 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 a1.
   DCHECK(function.is(a1));
 
   // Get the function and setup the context.
   ld(cp, FieldMemOperand(a1, 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.
-  ld(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-  InvokeCode(a3, expected, actual, flag, call_wrapper);
+  ld(t0, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
+  InvokeCode(t0, 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) {
   li(a1, function);
   InvokeFunction(a1, expected, actual, flag, call_wrapper);
@@ skipping 1924 matching lines @@
   if (mag.shift > 0) sra(result, result, mag.shift);
   srl(at, dividend, 31);
   Addu(result, result, Operand(at));
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS64