Hydrogen code stubs for vector-based ICs.

src/x87/code-stubs-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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 315 matching lines @@
 void MathPowStub::Generate(MacroAssembler* masm) {
   // No SSE2 support
   UNREACHABLE();
 }
 
 
 void FunctionPrototypeStub::Generate(MacroAssembler* masm) {
   Label miss;
   Register receiver = LoadDescriptor::ReceiverRegister();
 
-  NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, eax,
-                                                          ebx, &miss);
+  if (FLAG_vector_ics) {
+    // With careful management, we won't have to save slot and vector on
+    // the stack. Simply handle the possibly missing case first.
+    // TODO(mvstanton): this code can be more efficient.
+    __ cmp(FieldOperand(receiver, JSFunction::kPrototypeOrInitialMapOffset),
+           Immediate(isolate()->factory()->the_hole_value()));
+    __ j(equal, &miss);
+    __ TryGetFunctionPrototype(receiver, eax, ebx, &miss);
+    __ ret(0);
+  } else {
+    NamedLoadHandlerCompiler::GenerateLoadFunctionPrototype(masm, receiver, eax,
+                                                            ebx, &miss);
+  }
   __ bind(&miss);
   PropertyAccessCompiler::TailCallBuiltin(
       masm, PropertyAccessCompiler::MissBuiltin(Code::LOAD_IC));
 }
 
 
 void LoadIndexedInterceptorStub::Generate(MacroAssembler* masm) {
   // Return address is on the stack.
   Label slow;
 
@@ skipping 22 matching lines @@
       masm, PropertyAccessCompiler::MissBuiltin(Code::KEYED_LOAD_IC));
 }
 
 
 void LoadIndexedStringStub::Generate(MacroAssembler* masm) {
   // Return address is on the stack.
   Label miss;
 
   Register receiver = LoadDescriptor::ReceiverRegister();
   Register index = LoadDescriptor::NameRegister();
-  Register scratch = ebx;
+  Register scratch = edi;
   DCHECK(!scratch.is(receiver) && !scratch.is(index));
   Register result = eax;
   DCHECK(!result.is(scratch));
+  DCHECK(!FLAG_vector_ics ||
+         (!scratch.is(VectorLoadICDescriptor::VectorRegister()) &&
+          result.is(VectorLoadICDescriptor::SlotRegister())));
+
+  // StringCharAtGenerator doesn't use the result register until it's passed
+  // the different miss possibilities. If it did, we would have a conflict
+  // when FLAG_vector_ics is true.
 
   StringCharAtGenerator char_at_generator(receiver, index, scratch, result,
                                           &miss,  // When not a string.
                                           &miss,  // When not a number.
                                           &miss,  // When index out of range.
                                           STRING_INDEX_IS_ARRAY_INDEX,
                                           RECEIVER_IS_STRING);
   char_at_generator.GenerateFast(masm);
   __ ret(0);
 
@@ skipping 4060 matching lines @@
                               Operand(ebp, 7 * kPointerSize),
                               NULL);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X87