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

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index 744a9c394b567cfed52f41bb2b41291a894f2045..8977d9384aba445338867695bc9d91bd89fe61d5 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -1304,6 +1304,7 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
 
 
 void MacroAssembler::InvokeCode(Register code,
+                                Register new_target,
                                 const ParameterCount& expected,
                                 const ParameterCount& actual,
                                 InvokeFlag flag,
@@ -1311,6 +1312,13 @@ void MacroAssembler::InvokeCode(Register code,
   // 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(r3));
+  if (!new_target.is_valid()) {
+    LoadRoot(r3, Heap::kUndefinedValueRootIndex);
+  }
+
   Label done;
   bool definitely_mismatches = false;
   InvokePrologue(expected, actual, &done, &definitely_mismatches, flag,
@@ -1333,6 +1341,7 @@ void MacroAssembler::InvokeCode(Register code,
 
 
 void MacroAssembler::InvokeFunction(Register fun,
+                                    Register new_target,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper) {
@@ -1343,7 +1352,7 @@ void MacroAssembler::InvokeFunction(Register fun,
   DCHECK(fun.is(r1));
 
   Register expected_reg = r2;
-  Register code_reg = r3;
+  Register code_reg = r4;
 
   ldr(code_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
   ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
@@ -1355,7 +1364,7 @@ void MacroAssembler::InvokeFunction(Register fun,
       FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
 
   ParameterCount expected(expected_reg);
-  InvokeCode(code_reg, expected, actual, flag, call_wrapper);
+  InvokeCode(code_reg, new_target, expected, actual, flag, call_wrapper);
 }
 
 
@@ -1376,8 +1385,8 @@ void MacroAssembler::InvokeFunction(Register function,
   // We call indirectly through the code field in the function to
   // allow recompilation to take effect without changing any of the
   // call sites.
-  ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
-  InvokeCode(r3, expected, actual, flag, call_wrapper);
+  ldr(r4, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
+  InvokeCode(r4, no_reg, expected, actual, flag, call_wrapper);
 }