MIPS: [runtime] Unify and simplify how frames are marked.

src/mips64/builtins-mips64.cc

Index: src/mips64/builtins-mips64.cc
diff --git a/src/mips64/builtins-mips64.cc b/src/mips64/builtins-mips64.cc
index ff068196b83720322b2369c252f949371d80604b..286e88f55a3dd6a2fa84680a751659654acdae12 100644
--- a/src/mips64/builtins-mips64.cc
+++ b/src/mips64/builtins-mips64.cc
@@ -528,6 +528,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
   //  -- a1     : constructor function
   //  -- a2     : allocation site or undefined
   //  -- a3     : new target
+  //  -- cp     : context
   //  -- ra     : return address
   //  -- sp[...]: constructor arguments
   // -----------------------------------
@@ -541,7 +542,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     // Preserve the incoming parameters on the stack.
     __ AssertUndefinedOrAllocationSite(a2, t0);
     __ SmiTag(a0);
-    __ Push(a2, a0);
+    __ Push(cp, a2, a0);
 
     if (create_implicit_receiver) {
       __ Push(a1, a3);
@@ -612,7 +613,7 @@ static void Generate_JSConstructStubHelper(MacroAssembler* masm,
     }
 
     // Restore context from the frame.
-    __ ld(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+    __ ld(cp, MemOperand(fp, ConstructFrameConstants::kContextOffset));
 
     if (create_implicit_receiver) {
       // If the result is an object (in the ECMA sense), we should get rid
@@ -743,8 +744,6 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   //  -- s0: argv
   // -----------------------------------
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
-  // Clear the context before we push it when entering the JS frame.
-  __ mov(cp, zero_reg);
 
   // Enter an internal frame.
   {
@@ -839,9 +838,7 @@ void Builtins::Generate_InterpreterEntryTrampoline(MacroAssembler* masm) {
   // MANUAL indicates that the scope shouldn't actually generate code to set up
   // the frame (that is done below).
   FrameScope frame_scope(masm, StackFrame::MANUAL);
-
-  __ Push(ra, fp, cp, a1);
-  __ Daddu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
+  __ PushStandardFrame(a1);
 
   // Get the bytecode array from the function object and load the pointer to the
   // first entry into kInterpreterBytecodeRegister.
@@ -1197,8 +1194,7 @@ void Builtins::Generate_MarkCodeAsExecutedOnce(MacroAssembler* masm) {
   __ MultiPop(saved_regs);
 
   // Perform prologue operations usually performed by the young code stub.
-  __ Push(ra, fp, cp, a1);
-  __ Daddu(fp, sp, Operand(StandardFrameConstants::kFixedFrameSizeFromFp));
+  __ PushStandardFrame(a1);
 
   // Jump to point after the code-age stub.
   __ Daddu(a0, a0, Operand((kNoCodeAgeSequenceLength)));
@@ -1967,7 +1963,8 @@ void PrepareForTailCall(MacroAssembler* masm, Register args_reg,
   // Drop possible interpreter handler/stub frame.
   {
     Label no_interpreter_frame;
-    __ ld(scratch3, MemOperand(fp, StandardFrameConstants::kMarkerOffset));
+    __ ld(scratch3,
+          MemOperand(fp, CommonFrameConstants::kContextOrFrameTypeOffset));
     __ Branch(&no_interpreter_frame, ne, scratch3,
               Operand(Smi::FromInt(StackFrame::STUB)));
     __ ld(fp, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
@@ -1977,7 +1974,8 @@ void PrepareForTailCall(MacroAssembler* masm, Register args_reg,
   // Check if next frame is an arguments adaptor frame.
   Label no_arguments_adaptor, formal_parameter_count_loaded;
   __ ld(scratch2, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
-  __ ld(scratch3, MemOperand(scratch2, StandardFrameConstants::kContextOffset));
+  __ ld(scratch3,
+        MemOperand(scratch2, CommonFrameConstants::kContextOrFrameTypeOffset));
   __ Branch(&no_arguments_adaptor, ne, scratch3,
             Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
 
@@ -1990,7 +1988,8 @@ void PrepareForTailCall(MacroAssembler* masm, Register args_reg,
 
   __ bind(&no_arguments_adaptor);
   // Load caller's formal parameter count
-  __ ld(scratch1, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
+  __ ld(scratch1,
+        MemOperand(fp, ArgumentsAdaptorFrameConstants::kFunctionOffset));
   __ ld(scratch1,
         FieldMemOperand(scratch1, JSFunction::kSharedFunctionInfoOffset));
   __ lw(scratch1,