MIPS: new classes: no longer experimental.

Port 2707d4c9

Original commit message:
This CL fixes tests that no longer valid and also fixes two issues:
1. 'super()' in non derived constructors.
2. Failure to step into derived constructors.

BUG=
R=paul.lind@imgtec.com

Review URL: https://codereview.chromium.org/920173002

Cr-Commit-Position: refs/heads/master@{#26635}

src/mips/builtins-mips.cc

@@ -807,10 +807,25 @@ void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) {
     __ Subu(t0, t0, Operand(2));
     __ Branch(&loop, ge, t0, Operand(zero_reg));
 
+    __ Addu(a0, a0, Operand(1));
+
+    // Handle step in.
+    Label skip_step_in;
+    ExternalReference debug_step_in_fp =
+        ExternalReference::debug_step_in_fp_address(masm->isolate());
+    __ li(a2, Operand(debug_step_in_fp));
+    __ lw(a2, MemOperand(a2));
+    __ Branch(&skip_step_in, eq, a2, Operand(zero_reg));
+
+    __ Push(a0, a1, a1);
+    __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
+    __ Pop(a0, a1);
+
+    __ bind(&skip_step_in);
+
     // Call the function.
     // a0: number of arguments
     // a1: constructor function
-    __ Addu(a0, a0, Operand(1));
     ParameterCount actual(a0);
     __ InvokeFunction(a1, actual, CALL_FUNCTION, NullCallWrapper());
 

src/mips/full-codegen-mips.cc

@@ -3226,7 +3226,7 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
 
 
 void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
-  Comment cmnt(masm_, "[ SuperConstructorCall");
+  if (!ValidateSuperCall(expr)) return;
   Variable* new_target_var = scope()->DeclarationScope()->new_target_var();
   GetVar(result_register(), new_target_var);
   __ Push(result_register());

src/mips64/builtins-mips64.cc

@@ -817,10 +817,26 @@ void Builtins::Generate_JSConstructStubForDerived(MacroAssembler* masm) {
     __ Daddu(a4, a4, Operand(-1));
     __ Branch(&loop, ge, a4, Operand(zero_reg));
 
+    __ Daddu(a0, a0, Operand(1));
+
+    // Handle step in.
+    Label skip_step_in;
+    ExternalReference debug_step_in_fp =
+        ExternalReference::debug_step_in_fp_address(masm->isolate());
+    __ li(a2, Operand(debug_step_in_fp));
+    __ ld(a2, MemOperand(a2));
+    __ Branch(&skip_step_in, eq, a2, Operand(zero_reg));
+
+    __ Push(a0, a1, a1);
+    __ CallRuntime(Runtime::kHandleStepInForDerivedConstructors, 1);
+    __ Pop(a0, a1);
+
+    __ bind(&skip_step_in);
+
+
     // Call the function.
     // a0: number of arguments
     // a1: constructor function
-    __ Daddu(a0, a0, Operand(1));
     ParameterCount actual(a0);
     __ InvokeFunction(a1, actual, CALL_FUNCTION, NullCallWrapper());
 

src/mips64/full-codegen-mips64.cc

@@ -3225,7 +3225,7 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
 
 
 void FullCodeGenerator::EmitSuperConstructorCall(Call* expr) {
-  Comment cmnt(masm_, "[ SuperConstructorCall");
+  if (!ValidateSuperCall(expr)) return;
   Variable* new_target_var = scope()->DeclarationScope()->new_target_var();
   GetVar(result_register(), new_target_var);
   __ Push(result_register());