[runtime] Unify and simplify how frames are marked

src/ic/arm/handler-compiler-arm.cc

 // Copyright 2014 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.
 
 #if V8_TARGET_ARCH_ARM
 
 #include "src/ic/handler-compiler.h"
 
 #include "src/field-type.h"
 #include "src/ic/call-optimization.h"
@@ skipping 10 matching lines @@
     MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
     int accessor_index, int expected_arguments, Register scratch) {
   // ----------- S t a t e -------------
   //  -- r0    : receiver
   //  -- r2    : name
   //  -- lr    : return address
   // -----------------------------------
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
 
+    // Save context register
+    __ push(cp);
+
     if (accessor_index >= 0) {
       DCHECK(!holder.is(scratch));
       DCHECK(!receiver.is(scratch));
       // Call the JavaScript getter with the receiver on the stack.
       if (map->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
         __ ldr(scratch,
                FieldMemOperand(receiver, JSGlobalObject::kGlobalProxyOffset));
         receiver = scratch;
       }
       __ push(receiver);
       ParameterCount actual(0);
       ParameterCount expected(expected_arguments);
       __ LoadAccessor(r1, holder, accessor_index, ACCESSOR_GETTER);
       __ InvokeFunction(r1, expected, actual, CALL_FUNCTION,
                         CheckDebugStepCallWrapper());
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
       masm->isolate()->heap()->SetGetterStubDeoptPCOffset(masm->pc_offset());
     }
 
     // Restore context register.
-    __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+    __ pop(cp);
   }
   __ Ret();
 }
 
 
 void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
     MacroAssembler* masm, Handle<Map> map, Register receiver, Register holder,
     int accessor_index, int expected_arguments, Register scratch) {
   // ----------- S t a t e -------------
   //  -- lr    : return address
   // -----------------------------------
   {
     FrameAndConstantPoolScope scope(masm, StackFrame::INTERNAL);
 
+    // Save context register
+    __ push(cp);
     // Save value register, so we can restore it later.
     __ push(value());
 
     if (accessor_index >= 0) {
       DCHECK(!holder.is(scratch));
       DCHECK(!receiver.is(scratch));
       DCHECK(!value().is(scratch));
       // Call the JavaScript setter with receiver and value on the stack.
       if (map->IsJSGlobalObjectMap()) {
         // Swap in the global receiver.
@@ skipping 10 matching lines @@
     } else {
       // If we generate a global code snippet for deoptimization only, remember
       // the place to continue after deoptimization.
       masm->isolate()->heap()->SetSetterStubDeoptPCOffset(masm->pc_offset());
     }
 
     // We have to return the passed value, not the return value of the setter.
     __ pop(r0);
 
     // Restore context register.
-    __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+    __ pop(cp);
   }
   __ Ret();
 }
 
 
 void PropertyHandlerCompiler::PushVectorAndSlot(Register vector,
                                                 Register slot) {
   MacroAssembler* masm = this->masm();
   __ push(vector);
   __ push(slot);
@@ skipping 682 matching lines @@
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, name);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM