X87: [Interpreter] Collect type feedback for 'new' in the bytecode handler.

src/builtins/x87/builtins-x87.cc

 // Copyright 2012 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_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 687 matching lines @@
     __ push(edi);
     __ CallRuntime(Runtime::kCompileBaseline);
 
     // Restore return value.
     __ pop(eax);
   }
   __ ret(0);
 }
 
 static void Generate_InterpreterPushArgs(MacroAssembler* masm,
-                                         Register array_limit) {
+                                         Register array_limit,
+                                         Register start_address) {
   // ----------- S t a t e -------------
-  //  -- ebx : Pointer to the last argument in the args array.
+  //  -- start_address : Pointer to the last argument in the args array.
   //  -- array_limit : Pointer to one before the first argument in the
   //                   args array.
   // -----------------------------------
   Label loop_header, loop_check;
   __ jmp(&loop_check);
   __ bind(&loop_header);
-  __ Push(Operand(ebx, 0));
-  __ sub(ebx, Immediate(kPointerSize));
+  __ Push(Operand(start_address, 0));
+  __ sub(start_address, Immediate(kPointerSize));
   __ bind(&loop_check);
-  __ cmp(ebx, array_limit);
+  __ cmp(start_address, array_limit);
   __ j(greater, &loop_header, Label::kNear);
 }
 
 // static
 void Builtins::Generate_InterpreterPushArgsAndCallImpl(
     MacroAssembler* masm, TailCallMode tail_call_mode,
     CallableType function_type) {
   // ----------- S t a t e -------------
   //  -- eax : the number of arguments (not including the receiver)
   //  -- ebx : the address of the first argument to be pushed. Subsequent
   //           arguments should be consecutive above this, in the same order as
   //           they are to be pushed onto the stack.
   //  -- edi : the target to call (can be any Object).
   // -----------------------------------
 
   // Pop return address to allow tail-call after pushing arguments.
   __ Pop(edx);
 
   // Find the address of the last argument.
   __ mov(ecx, eax);
   __ add(ecx, Immediate(1));  // Add one for receiver.
   __ shl(ecx, kPointerSizeLog2);
   __ neg(ecx);
   __ add(ecx, ebx);
 
-  Generate_InterpreterPushArgs(masm, ecx);
+  // TODO(mythria): Add a stack check before pushing the arguments.
+  Generate_InterpreterPushArgs(masm, ecx, ebx);
 
   // Call the target.
   __ Push(edx);  // Re-push return address.
 
   if (function_type == CallableType::kJSFunction) {
     __ Jump(masm->isolate()->builtins()->CallFunction(ConvertReceiverMode::kAny,
                                                       tail_call_mode),
             RelocInfo::CODE_TARGET);
   } else {
     DCHECK_EQ(function_type, CallableType::kAny);
     __ Jump(masm->isolate()->builtins()->Call(ConvertReceiverMode::kAny,
                                               tail_call_mode),
             RelocInfo::CODE_TARGET);
   }
 }
 
 // static
-void Builtins::Generate_InterpreterPushArgsAndConstruct(MacroAssembler* masm) {
+void Builtins::Generate_InterpreterPushArgsAndConstructImpl(
+    MacroAssembler* masm, CallableType construct_type) {
   // ----------- S t a t e -------------
   //  -- eax : the number of arguments (not including the receiver)
   //  -- edx : the new target
   //  -- edi : the constructor
-  //  -- ebx : the address of the first argument to be pushed. Subsequent
+  //  -- ebx : allocation site feedback (if available or undefined)
+  //  -- ecx : the address of the first argument to be pushed. Subsequent
   //           arguments should be consecutive above this, in the same order as
   //           they are to be pushed onto the stack.
   // -----------------------------------
 
-  // Pop return address to allow tail-call after pushing arguments.
-  __ Pop(ecx);
+  // Store edi, edx onto the stack. We need two extra registers
+  // so store edi, edx temporarily on stack.
+  __ Push(edi);
+  __ Push(edx);
 
-  // Push edi in the slot meant for receiver. We need an extra register
-  // so store edi temporarily on stack.
-  __ Push(edi);
+  // We have to pop return address and the two temporary registers before we
+  // can push arguments onto the stack. we do not have any free registers so
+  // update the stack and copy them into the correct places on the stack.
+  //  current stack    =====>    required stack layout
+  // |             |            | edx           | (2) <-- esp(1)
+  // |             |            | edi           | (3)
+  // |             |            | return addr   | (4)
+  // |             |            | arg N         | (5)
+  // | edx         | <-- esp    | ....          |
+  // | edi         |            | arg 0         |
+  // | return addr |            | receiver slot |
 
-  // Find the address of the last argument.
-  __ mov(edi, eax);
-  __ neg(edi);
-  __ shl(edi, kPointerSizeLog2);
-  __ add(edi, ebx);
+  // First increment the stack pointer to the correct location.
+  // we need additional slots for arguments and the receiver.
+  // Step 1 - compute the required increment to the stack.
+  __ mov(edx, eax);
+  __ shl(edx, kPointerSizeLog2);
+  __ add(edx, Immediate(kPointerSize));
 
-  Generate_InterpreterPushArgs(masm, edi);
+#ifdef _MSC_VER
+  // TODO(mythria): Move it to macro assembler.
+  // In windows, we cannot increment the stack size by more than one page
+  // (mimimum page size is 4KB) without accessing at least one byte on the
+  // page. Check this:
+  // https://msdn.microsoft.com/en-us/library/aa227153(v=vs.60).aspx.
+  const int page_size = 4 * 1024;
+  Label check_offset, update_stack_pointer;
+  __ bind(&check_offset);
+  __ cmp(edx, page_size);
+  __ j(less, &update_stack_pointer);
+  __ sub(esp, Immediate(page_size));
+  // Just to touch the page, before we increment further.
+  __ mov(Operand(esp, 0), Immediate(0));
+  __ sub(edx, Immediate(page_size));
+  __ jmp(&check_offset);
+  __ bind(&update_stack_pointer);
+#endif
 
-  // Restore the constructor from slot on stack. It was pushed at the slot
-  // meant for receiver.
-  __ mov(edi, Operand(esp, eax, times_pointer_size, 0));
+  // TODO(mythria): Add a stack check before updating the stack pointer.
 
-  // Re-push return address.
-  __ Push(ecx);
+  // Step 1 - Update the stack pointer.
+  __ sub(esp, edx);
 
-  // Call the constructor with unmodified eax, edi, ebi values.
-  __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+  // Step 2 move edx to the correct location. Move edx first otherwise
+  // we may overwrite when eax = 0 or 1, basically when the source and
+  // destination overlap. We at least need one extra slot for receiver,
+  // so no extra checks are required to avoid copy.
+  __ mov(edi, Operand(esp, eax, times_pointer_size, 1 * kPointerSize));
+  __ mov(Operand(esp, 0), edi);
+
+  // Step 3 move edi to the correct location
+  __ mov(edi, Operand(esp, eax, times_pointer_size, 2 * kPointerSize));
+  __ mov(Operand(esp, 1 * kPointerSize), edi);
+
+  // Step 4 move return address to the correct location
+  __ mov(edi, Operand(esp, eax, times_pointer_size, 3 * kPointerSize));
+  __ mov(Operand(esp, 2 * kPointerSize), edi);
+
+  // Slot meant for receiver contains return address. Reset it so that
+  // we will not incorrectly interpret return address as an object.
+  __ mov(Operand(esp, eax, times_pointer_size, 3 * kPointerSize), Immediate(0));
+
+  // Step 5 copy arguments to correct locations.
+  __ mov(edx, eax);
+
+  Label loop_header, loop_check;
+  __ jmp(&loop_check);
+  __ bind(&loop_header);
+  __ mov(edi, Operand(ecx, 0));
+  __ mov(Operand(esp, edx, times_pointer_size, 2 * kPointerSize), edi);
+  __ sub(ecx, Immediate(kPointerSize));
+  __ sub(edx, Immediate(1));
+  __ bind(&loop_check);
+  __ cmp(edx, Immediate(0));
+  __ j(greater, &loop_header, Label::kNear);
+
+  // Restore edi and edx.
+  __ Pop(edx);
+  __ Pop(edi);
+
+  __ AssertUndefinedOrAllocationSite(ebx);
+  if (construct_type == CallableType::kJSFunction) {
+    // Tail call to the function-specific construct stub (still in the caller
+    // context at this point).
+    __ AssertFunction(edi);
+
+    __ mov(ecx, FieldOperand(edi, JSFunction::kSharedFunctionInfoOffset));
+    __ mov(ecx, FieldOperand(ecx, SharedFunctionInfo::kConstructStubOffset));
+    __ lea(ecx, FieldOperand(ecx, Code::kHeaderSize));
+    __ jmp(ecx);
+  } else {
+    DCHECK_EQ(construct_type, CallableType::kAny);
+
+    // Call the constructor with unmodified eax, edi, edx values.
+    __ Jump(masm->isolate()->builtins()->Construct(), RelocInfo::CODE_TARGET);
+  }
 }
 
 void Builtins::Generate_InterpreterEnterBytecodeDispatch(MacroAssembler* masm) {
   // Set the return address to the correct point in the interpreter entry
   // trampoline.
   Smi* interpreter_entry_return_pc_offset(
       masm->isolate()->heap()->interpreter_entry_return_pc_offset());
   DCHECK_NE(interpreter_entry_return_pc_offset, Smi::FromInt(0));
   __ LoadHeapObject(ebx,
                     masm->isolate()->builtins()->InterpreterEntryTrampoline());
@@ skipping 2257 matching lines @@
 
 void Builtins::Generate_InterpreterOnStackReplacement(MacroAssembler* masm) {
   Generate_OnStackReplacementHelper(masm, true);
 }
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87