Revert 13105: "Enable stub generation using Hydrogen/Lithium."

src/x64/stub-cache-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 3192 matching lines @@
 
 
 Handle<Code> KeyedLoadStubCompiler::CompileLoadElement(
     Handle<Map> receiver_map) {
   // ----------- S t a t e -------------
   //  -- rax    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
   ElementsKind elements_kind = receiver_map->elements_kind();
-  if (receiver_map->has_fast_elements() ||
-      receiver_map->has_external_array_elements()) {
-    Handle<Code> stub = KeyedLoadFastElementStub(
-        receiver_map->instance_type() == JS_ARRAY_TYPE,
-        elements_kind).GetCode();
-    __ DispatchMap(rdx, receiver_map, stub, DO_SMI_CHECK);
-  } else {
-    Handle<Code> stub =
-        KeyedLoadDictionaryElementStub().GetCode();
-    __ DispatchMap(rdx, receiver_map, stub, DO_SMI_CHECK);
-  }
+  Handle<Code> stub = KeyedLoadElementStub(elements_kind).GetCode();
 
-  GenerateLoadMiss(masm(), Code::KEYED_LOAD_IC);
+  __ DispatchMap(rdx, receiver_map, stub, DO_SMI_CHECK);
+
+  Handle<Code> ic = isolate()->builtins()->KeyedLoadIC_Miss();
+  __ jmp(ic, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
   return GetCode(Code::NORMAL, factory()->empty_string());
 }
 
 
 Handle<Code> KeyedLoadStubCompiler::CompileLoadPolymorphic(
     MapHandleList* receiver_maps,
     CodeHandleList* handler_ics) {
   // ----------- S t a t e -------------
@@ skipping 221 matching lines @@
   __ cvttsd2si(scratch, xmm_scratch0);
   __ cvtlsi2sd(xmm_scratch1, scratch);
   __ ucomisd(xmm_scratch1, xmm_scratch0);
   __ j(not_equal, fail);
   __ j(parity_even, fail);  // NaN.
   __ Integer32ToSmi(key, scratch);
   __ bind(&key_ok);
 }
 
 
+void KeyedLoadStubCompiler::GenerateLoadExternalArray(
+    MacroAssembler* masm,
+    ElementsKind elements_kind) {
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0] : return address
+  // -----------------------------------
+  Label slow, miss_force_generic;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, rax, rcx, xmm0, xmm1, &miss_force_generic);
+
+  // Check that the index is in range.
+  __ movq(rbx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ SmiToInteger32(rcx, rax);
+  __ cmpq(rax, FieldOperand(rbx, ExternalArray::kLengthOffset));
+  // Unsigned comparison catches both negative and too-large values.
+  __ j(above_equal, &miss_force_generic);
+
+  // rax: index (as a smi)
+  // rdx: receiver (JSObject)
+  // rcx: untagged index
+  // rbx: elements array
+  __ movq(rbx, FieldOperand(rbx, ExternalArray::kExternalPointerOffset));
+  // rbx: base pointer of external storage
+  switch (elements_kind) {
+    case EXTERNAL_BYTE_ELEMENTS:
+      __ movsxbq(rcx, Operand(rbx, rcx, times_1, 0));
+      break;
+    case EXTERNAL_PIXEL_ELEMENTS:
+    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+      __ movzxbq(rcx, Operand(rbx, rcx, times_1, 0));
+      break;
+    case EXTERNAL_SHORT_ELEMENTS:
+      __ movsxwq(rcx, Operand(rbx, rcx, times_2, 0));
+      break;
+    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+      __ movzxwq(rcx, Operand(rbx, rcx, times_2, 0));
+      break;
+    case EXTERNAL_INT_ELEMENTS:
+      __ movsxlq(rcx, Operand(rbx, rcx, times_4, 0));
+      break;
+    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
+      __ movl(rcx, Operand(rbx, rcx, times_4, 0));
+      break;
+    case EXTERNAL_FLOAT_ELEMENTS:
+      __ cvtss2sd(xmm0, Operand(rbx, rcx, times_4, 0));
+      break;
+    case EXTERNAL_DOUBLE_ELEMENTS:
+      __ movsd(xmm0, Operand(rbx, rcx, times_8, 0));
+      break;
+    default:
+      UNREACHABLE();
+      break;
+  }
+
+  // rax: index
+  // rdx: receiver
+  // For integer array types:
+  // rcx: value
+  // For floating-point array type:
+  // xmm0: value as double.
+
+  ASSERT(kSmiValueSize == 32);
+  if (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) {
+    // For the UnsignedInt array type, we need to see whether
+    // the value can be represented in a Smi. If not, we need to convert
+    // it to a HeapNumber.
+    Label box_int;
+
+    __ JumpIfUIntNotValidSmiValue(rcx, &box_int, Label::kNear);
+
+    __ Integer32ToSmi(rax, rcx);
+    __ ret(0);
+
+    __ bind(&box_int);
+
+    // Allocate a HeapNumber for the int and perform int-to-double
+    // conversion.
+    // The value is zero-extended since we loaded the value from memory
+    // with movl.
+    __ cvtqsi2sd(xmm0, rcx);
+
+    __ AllocateHeapNumber(rcx, rbx, &slow);
+    // Set the value.
+    __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm0);
+    __ movq(rax, rcx);
+    __ ret(0);
+  } else if (elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+             elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
+    // For the floating-point array type, we need to always allocate a
+    // HeapNumber.
+    __ AllocateHeapNumber(rcx, rbx, &slow);
+    // Set the value.
+    __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm0);
+    __ movq(rax, rcx);
+    __ ret(0);
+  } else {
+    __ Integer32ToSmi(rax, rcx);
+    __ ret(0);
+  }
+
+  // Slow case: Jump to runtime.
+  __ bind(&slow);
+  Counters* counters = masm->isolate()->counters();
+  __ IncrementCounter(counters->keyed_load_external_array_slow(), 1);
+
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0]  : return address
+  // -----------------------------------
+
+  Handle<Code> ic = masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(ic, RelocInfo::CODE_TARGET);
+
+  // Miss case: Jump to runtime.
+  __ bind(&miss_force_generic);
+
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0]  : return address
+  // -----------------------------------
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 void KeyedStoreStubCompiler::GenerateStoreExternalArray(
     MacroAssembler* masm,
     ElementsKind elements_kind) {
   // ----------- S t a t e -------------
   //  -- rax     : value
   //  -- rcx     : key
   //  -- rdx     : receiver
   //  -- rsp[0]  : return address
   // -----------------------------------
   Label slow, miss_force_generic;
@@ skipping 169 matching lines @@
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
   // -----------------------------------
 
   Handle<Code> miss_ic =
       masm->isolate()->builtins()->KeyedStoreIC_MissForceGeneric();
   __ jmp(miss_ic, RelocInfo::CODE_TARGET);
 }
 
 
+void KeyedLoadStubCompiler::GenerateLoadFastElement(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0] : return address
+  // -----------------------------------
+  Label miss_force_generic;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, rax, rcx, xmm0, xmm1, &miss_force_generic);
+
+  // Get the elements array.
+  __ movq(rcx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ AssertFastElements(rcx);
+
+  // Check that the key is within bounds.
+  __ SmiCompare(rax, FieldOperand(rcx, FixedArray::kLengthOffset));
+  __ j(above_equal, &miss_force_generic);
+
+  // Load the result and make sure it's not the hole.
+  SmiIndex index = masm->SmiToIndex(rbx, rax, kPointerSizeLog2);
+  __ movq(rbx, FieldOperand(rcx,
+                            index.reg,
+                            index.scale,
+                            FixedArray::kHeaderSize));
+  __ CompareRoot(rbx, Heap::kTheHoleValueRootIndex);
+  __ j(equal, &miss_force_generic);
+  __ movq(rax, rbx);
+  __ ret(0);
+
+  __ bind(&miss_force_generic);
+  Code* code = masm->isolate()->builtins()->builtin(
+      Builtins::kKeyedLoadIC_MissForceGeneric);
+  Handle<Code> ic(code);
+  __ jmp(ic, RelocInfo::CODE_TARGET);
+}
+
+
+void KeyedLoadStubCompiler::GenerateLoadFastDoubleElement(
+    MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- rax    : key
+  //  -- rdx    : receiver
+  //  -- rsp[0] : return address
+  // -----------------------------------
+  Label miss_force_generic, slow_allocate_heapnumber;
+
+  // This stub is meant to be tail-jumped to, the receiver must already
+  // have been verified by the caller to not be a smi.
+
+  // Check that the key is a smi or a heap number convertible to a smi.
+  GenerateSmiKeyCheck(masm, rax, rcx, xmm0, xmm1, &miss_force_generic);
+
+  // Get the elements array.
+  __ movq(rcx, FieldOperand(rdx, JSObject::kElementsOffset));
+  __ AssertFastElements(rcx);
+
+  // Check that the key is within bounds.
+  __ SmiCompare(rax, FieldOperand(rcx, FixedArray::kLengthOffset));
+  __ j(above_equal, &miss_force_generic);
+
+  // Check for the hole
+  __ SmiToInteger32(kScratchRegister, rax);
+  uint32_t offset = FixedDoubleArray::kHeaderSize + sizeof(kHoleNanLower32);
+  __ cmpl(FieldOperand(rcx, kScratchRegister, times_8, offset),
+          Immediate(kHoleNanUpper32));
+  __ j(equal, &miss_force_generic);
+
+  // Always allocate a heap number for the result.
+  __ movsd(xmm0, FieldOperand(rcx, kScratchRegister, times_8,
+                              FixedDoubleArray::kHeaderSize));
+  __ AllocateHeapNumber(rcx, rbx, &slow_allocate_heapnumber);
+  // Set the value.
+  __ movq(rax, rcx);
+  __ movsd(FieldOperand(rcx, HeapNumber::kValueOffset), xmm0);
+  __ ret(0);
+
+  __ bind(&slow_allocate_heapnumber);
+  Handle<Code> slow_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_Slow();
+  __ jmp(slow_ic, RelocInfo::CODE_TARGET);
+
+  __ bind(&miss_force_generic);
+  Handle<Code> miss_ic =
+      masm->isolate()->builtins()->KeyedLoadIC_MissForceGeneric();
+  __ jmp(miss_ic, RelocInfo::CODE_TARGET);
+}
+
+
 void KeyedStoreStubCompiler::GenerateStoreFastElement(
     MacroAssembler* masm,
     bool is_js_array,
     ElementsKind elements_kind,
     KeyedAccessGrowMode grow_mode) {
   // ----------- S t a t e -------------
   //  -- rax    : value
   //  -- rcx    : key
   //  -- rdx    : receiver
   //  -- rsp[0] : return address
@@ skipping 262 matching lines @@
     __ jmp(ic_slow, RelocInfo::CODE_TARGET);
   }
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64