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

src/mips/macro-assembler-mips.cc

Index: src/mips/macro-assembler-mips.cc
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index c931e5b7e605cd41a0a1039d2eacf593ae771d11..ff58fbc03e37c382d9d5f3b4563e0997e68749c3 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -4046,6 +4046,7 @@ void MacroAssembler::InvokePrologue(const ParameterCount& expected,
 
 
 void MacroAssembler::InvokeCode(Register code,
+                                Register new_target,
                                 const ParameterCount& expected,
                                 const ParameterCount& actual,
                                 InvokeFlag flag,
@@ -4053,8 +4054,14 @@ void MacroAssembler::InvokeCode(Register code,
   // You can't call a function without a valid frame.
   DCHECK(flag == JUMP_FUNCTION || has_frame());
 
-  Label done;
+  // 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);
@@ -4075,6 +4082,7 @@ void MacroAssembler::InvokeCode(Register code,
 
 
 void MacroAssembler::InvokeFunction(Register function,
+                                    Register new_target,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
                                     const CallWrapper& call_wrapper) {
@@ -4084,7 +4092,7 @@ void MacroAssembler::InvokeFunction(Register function,
   // 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;
 
   lw(code_reg, FieldMemOperand(a1, JSFunction::kSharedFunctionInfoOffset));
   lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
@@ -4095,7 +4103,7 @@ void MacroAssembler::InvokeFunction(Register function,
   lw(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);
 }
 
 
@@ -4116,8 +4124,8 @@ 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.
-  lw(a3, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
-  InvokeCode(a3, expected, actual, flag, call_wrapper);
+  lw(t0, FieldMemOperand(a1, JSFunction::kCodeEntryOffset));
+  InvokeCode(t0, no_reg, expected, actual, flag, call_wrapper);
 }