Remove platform-specific dead code for KeyedStores

src/ia32/stub-cache-ia32.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 3236 matching lines @@
   __ bind(&miss_force_generic);
   // ----------- S t a t e -------------
   //  -- ecx    : key
   //  -- edx    : receiver
   //  -- esp[0] : return address
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_MissForceGeneric);
 }
 
 
-static void GenerateSmiKeyCheck(MacroAssembler* masm,
-                                Register key,
-                                Register scratch,
-                                XMMRegister xmm_scratch0,
-                                XMMRegister xmm_scratch1,
-                                Label* fail) {
-  // Check that key is a smi and if SSE2 is available a heap number
-  // containing a smi and branch if the check fails.
-  if (CpuFeatures::IsSupported(SSE2)) {
-    CpuFeatureScope use_sse2(masm, SSE2);
-    Label key_ok;
-    __ JumpIfSmi(key, &key_ok);
-    __ cmp(FieldOperand(key, HeapObject::kMapOffset),
-           Immediate(Handle<Map>(masm->isolate()->heap()->heap_number_map())));
-    __ j(not_equal, fail);
-    __ movdbl(xmm_scratch0, FieldOperand(key, HeapNumber::kValueOffset));
-    __ cvttsd2si(scratch, Operand(xmm_scratch0));
-    __ cvtsi2sd(xmm_scratch1, scratch);
-    __ ucomisd(xmm_scratch1, xmm_scratch0);
-    __ j(not_equal, fail);
-    __ j(parity_even, fail);  // NaN.
-    // Check if the key fits in the smi range.
-    __ cmp(scratch, 0xc0000000);
-    __ j(sign, fail);
-    __ SmiTag(scratch);
-    __ mov(key, scratch);
-    __ bind(&key_ok);
-  } else {
-    __ JumpIfNotSmi(key, fail);
-  }
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreExternalArray(
-    MacroAssembler* masm,
-    ElementsKind elements_kind) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  Label miss_force_generic, slow, check_heap_number;
-
-  // 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, ecx, ebx, xmm0, xmm1, &miss_force_generic);
-
-  // Check that the index is in range.
-  __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-  __ cmp(ecx, FieldOperand(edi, ExternalArray::kLengthOffset));
-  // Unsigned comparison catches both negative and too-large values.
-  __ j(above_equal, &slow);
-
-  // Handle both smis and HeapNumbers in the fast path. Go to the
-  // runtime for all other kinds of values.
-  // eax: value
-  // edx: receiver
-  // ecx: key
-  // edi: elements array
-  if (elements_kind == EXTERNAL_PIXEL_ELEMENTS) {
-    __ JumpIfNotSmi(eax, &slow);
-  } else {
-    __ JumpIfNotSmi(eax, &check_heap_number);
-  }
-
-  // smi case
-  __ mov(ebx, eax);  // Preserve the value in eax as the return value.
-  __ SmiUntag(ebx);
-  __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
-  // edi: base pointer of external storage
-  switch (elements_kind) {
-    case EXTERNAL_PIXEL_ELEMENTS:
-      __ ClampUint8(ebx);
-      __ SmiUntag(ecx);
-      __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
-      break;
-    case EXTERNAL_BYTE_ELEMENTS:
-    case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-      __ SmiUntag(ecx);
-      __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
-      break;
-    case EXTERNAL_SHORT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-      __ mov_w(Operand(edi, ecx, times_1, 0), ebx);
-      break;
-    case EXTERNAL_INT_ELEMENTS:
-    case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-      __ mov(Operand(edi, ecx, times_2, 0), ebx);
-      break;
-    case EXTERNAL_FLOAT_ELEMENTS:
-    case EXTERNAL_DOUBLE_ELEMENTS:
-      // Need to perform int-to-float conversion.
-      __ push(ebx);
-      __ fild_s(Operand(esp, 0));
-      __ pop(ebx);
-      if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-        __ fstp_s(Operand(edi, ecx, times_2, 0));
-      } else {  // elements_kind == EXTERNAL_DOUBLE_ELEMENTS.
-        __ fstp_d(Operand(edi, ecx, times_4, 0));
-      }
-      break;
-    default:
-      UNREACHABLE();
-      break;
-  }
-  __ ret(0);  // Return the original value.
-
-  // TODO(danno): handle heap number -> pixel array conversion
-  if (elements_kind != EXTERNAL_PIXEL_ELEMENTS) {
-    __ bind(&check_heap_number);
-    // eax: value
-    // edx: receiver
-    // ecx: key
-    // edi: elements array
-    __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
-           Immediate(masm->isolate()->factory()->heap_number_map()));
-    __ j(not_equal, &slow);
-
-    // The WebGL specification leaves the behavior of storing NaN and
-    // +/-Infinity into integer arrays basically undefined. For more
-    // reproducible behavior, convert these to zero.
-    __ mov(edi, FieldOperand(edi, ExternalArray::kExternalPointerOffset));
-    // edi: base pointer of external storage
-    if (elements_kind == EXTERNAL_FLOAT_ELEMENTS) {
-      __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
-      __ fstp_s(Operand(edi, ecx, times_2, 0));
-      __ ret(0);
-    } else if (elements_kind == EXTERNAL_DOUBLE_ELEMENTS) {
-      __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
-      __ fstp_d(Operand(edi, ecx, times_4, 0));
-      __ ret(0);
-    } else {
-      // Perform float-to-int conversion with truncation (round-to-zero)
-      // behavior.
-
-      // For the moment we make the slow call to the runtime on
-      // processors that don't support SSE2. The code in IntegerConvert
-      // (code-stubs-ia32.cc) is roughly what is needed here though the
-      // conversion failure case does not need to be handled.
-      if (CpuFeatures::IsSupported(SSE2)) {
-        if ((elements_kind == EXTERNAL_INT_ELEMENTS ||
-             elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) &&
-            CpuFeatures::IsSupported(SSE3)) {
-          CpuFeatureScope scope(masm, SSE3);
-          // fisttp stores values as signed integers. To represent the
-          // entire range of int and unsigned int arrays, store as a
-          // 64-bit int and discard the high 32 bits.
-          __ fld_d(FieldOperand(eax, HeapNumber::kValueOffset));
-          __ sub(esp, Immediate(2 * kPointerSize));
-          __ fisttp_d(Operand(esp, 0));
-
-          // If conversion failed (NaN, infinity, or a number outside
-          // signed int64 range), the result is 0x8000000000000000, and
-          // we must handle this case in the runtime.
-          Label ok;
-          __ cmp(Operand(esp, kPointerSize), Immediate(0x80000000u));
-          __ j(not_equal, &ok);
-          __ cmp(Operand(esp, 0), Immediate(0));
-          __ j(not_equal, &ok);
-          __ add(esp, Immediate(2 * kPointerSize));  // Restore the stack.
-          __ jmp(&slow);
-
-          __ bind(&ok);
-          __ pop(ebx);
-          __ add(esp, Immediate(kPointerSize));
-          __ mov(Operand(edi, ecx, times_2, 0), ebx);
-        } else {
-          ASSERT(CpuFeatures::IsSupported(SSE2));
-          CpuFeatureScope scope(masm, SSE2);
-          __ cvttsd2si(ebx, FieldOperand(eax, HeapNumber::kValueOffset));
-          __ cmp(ebx, 0x80000000u);
-          __ j(equal, &slow);
-          // ebx: untagged integer value
-          switch (elements_kind) {
-            case EXTERNAL_PIXEL_ELEMENTS:
-              __ ClampUint8(ebx);
-              // Fall through.
-            case EXTERNAL_BYTE_ELEMENTS:
-            case EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
-              __ SmiUntag(ecx);
-              __ mov_b(Operand(edi, ecx, times_1, 0), ebx);
-              break;
-            case EXTERNAL_SHORT_ELEMENTS:
-            case EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
-              __ mov_w(Operand(edi, ecx, times_1, 0), ebx);
-              break;
-            case EXTERNAL_INT_ELEMENTS:
-            case EXTERNAL_UNSIGNED_INT_ELEMENTS:
-              __ mov(Operand(edi, ecx, times_2, 0), ebx);
-              break;
-            default:
-              UNREACHABLE();
-              break;
-          }
-        }
-        __ ret(0);  // Return original value.
-      }
-    }
-  }
-
-  // Slow case: call runtime.
-  __ bind(&slow);
-  Counters* counters = masm->isolate()->counters();
-  __ IncrementCounter(counters->keyed_store_external_array_slow(), 1);
-
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
-
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-
-  __ bind(&miss_force_generic);
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreFastElement(
-    MacroAssembler* masm,
-    bool is_js_array,
-    ElementsKind elements_kind,
-    KeyedAccessStoreMode store_mode) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  Label miss_force_generic, grow, slow, transition_elements_kind;
-  Label check_capacity, prepare_slow, finish_store, commit_backing_store;
-
-  // 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, ecx, ebx, xmm0, xmm1, &miss_force_generic);
-
-  if (IsFastSmiElementsKind(elements_kind)) {
-    __ JumpIfNotSmi(eax, &transition_elements_kind);
-  }
-
-  // Get the elements array and make sure it is a fast element array, not 'cow'.
-  __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-  if (is_js_array) {
-    // Check that the key is within bounds.
-    __ cmp(ecx, FieldOperand(edx, JSArray::kLengthOffset));  // smis.
-    if (IsGrowStoreMode(store_mode)) {
-      __ j(above_equal, &grow);
-    } else {
-      __ j(above_equal, &miss_force_generic);
-    }
-  } else {
-    // Check that the key is within bounds.
-    __ cmp(ecx, FieldOperand(edi, FixedArray::kLengthOffset));  // smis.
-    __ j(above_equal, &miss_force_generic);
-  }
-
-  __ cmp(FieldOperand(edi, HeapObject::kMapOffset),
-         Immediate(masm->isolate()->factory()->fixed_array_map()));
-  __ j(not_equal, &miss_force_generic);
-
-  __ bind(&finish_store);
-  if (IsFastSmiElementsKind(elements_kind)) {
-    // ecx is a smi, use times_half_pointer_size instead of
-    // times_pointer_size
-    __ mov(FieldOperand(edi,
-                        ecx,
-                        times_half_pointer_size,
-                        FixedArray::kHeaderSize), eax);
-  } else {
-    ASSERT(IsFastObjectElementsKind(elements_kind));
-    // Do the store and update the write barrier.
-    // ecx is a smi, use times_half_pointer_size instead of
-    // times_pointer_size
-    __ lea(ecx, FieldOperand(edi,
-                             ecx,
-                             times_half_pointer_size,
-                             FixedArray::kHeaderSize));
-    __ mov(Operand(ecx, 0), eax);
-    // Make sure to preserve the value in register eax.
-    __ mov(ebx, eax);
-    __ RecordWrite(edi, ecx, ebx, kDontSaveFPRegs);
-  }
-
-  // Done.
-  __ ret(0);
-
-  // Handle store cache miss, replacing the ic with the generic stub.
-  __ bind(&miss_force_generic);
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-
-  // Handle transition to other elements kinds without using the generic stub.
-  __ bind(&transition_elements_kind);
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Miss);
-
-  if (is_js_array && IsGrowStoreMode(store_mode)) {
-    // Handle transition requiring the array to grow.
-    __ bind(&grow);
-
-    // Make sure the array is only growing by a single element, anything else
-    // must be handled by the runtime. Flags are already set by previous
-    // compare.
-    __ j(not_equal, &miss_force_generic);
-
-    // Check for the empty array, and preallocate a small backing store if
-    // possible.
-    __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-    __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
-    __ j(not_equal, &check_capacity);
-
-    int size = FixedArray::SizeFor(JSArray::kPreallocatedArrayElements);
-    __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT);
-    // Restore the key, which is known to be the array length.
-
-    // eax: value
-    // ecx: key
-    // edx: receiver
-    // edi: elements
-    // Make sure that the backing store can hold additional elements.
-    __ mov(FieldOperand(edi, JSObject::kMapOffset),
-           Immediate(masm->isolate()->factory()->fixed_array_map()));
-    __ mov(FieldOperand(edi, FixedArray::kLengthOffset),
-           Immediate(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
-    __ mov(ebx, Immediate(masm->isolate()->factory()->the_hole_value()));
-    for (int i = 1; i < JSArray::kPreallocatedArrayElements; ++i) {
-      __ mov(FieldOperand(edi, FixedArray::SizeFor(i)), ebx);
-    }
-
-    // Store the element at index zero.
-    __ mov(FieldOperand(edi, FixedArray::SizeFor(0)), eax);
-
-    // Install the new backing store in the JSArray.
-    __ mov(FieldOperand(edx, JSObject::kElementsOffset), edi);
-    __ RecordWriteField(edx, JSObject::kElementsOffset, edi, ebx,
-                        kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-
-    // Increment the length of the array.
-    __ mov(FieldOperand(edx, JSArray::kLengthOffset),
-           Immediate(Smi::FromInt(1)));
-    __ ret(0);
-
-    __ bind(&check_capacity);
-    __ cmp(FieldOperand(edi, HeapObject::kMapOffset),
-           Immediate(masm->isolate()->factory()->fixed_cow_array_map()));
-    __ j(equal, &miss_force_generic);
-
-    // eax: value
-    // ecx: key
-    // edx: receiver
-    // edi: elements
-    // Make sure that the backing store can hold additional elements.
-    __ cmp(ecx, FieldOperand(edi, FixedArray::kLengthOffset));
-    __ j(above_equal, &slow);
-
-    // Grow the array and finish the store.
-    __ add(FieldOperand(edx, JSArray::kLengthOffset),
-           Immediate(Smi::FromInt(1)));
-    __ jmp(&finish_store);
-
-    __ bind(&prepare_slow);
-    // Restore the key, which is known to be the array length.
-    __ mov(ecx, Immediate(0));
-
-    __ bind(&slow);
-    TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
-  }
-}
-
-
-void KeyedStoreStubCompiler::GenerateStoreFastDoubleElement(
-    MacroAssembler* masm,
-    bool is_js_array,
-    KeyedAccessStoreMode store_mode) {
-  // ----------- S t a t e -------------
-  //  -- eax    : value
-  //  -- ecx    : key
-  //  -- edx    : receiver
-  //  -- esp[0] : return address
-  // -----------------------------------
-  Label miss_force_generic, transition_elements_kind, grow, slow;
-  Label check_capacity, prepare_slow, finish_store, commit_backing_store;
-
-  // 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, ecx, ebx, xmm0, xmm1, &miss_force_generic);
-
-  // Get the elements array.
-  __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-  __ AssertFastElements(edi);
-
-  if (is_js_array) {
-    // Check that the key is within bounds.
-    __ cmp(ecx, FieldOperand(edx, JSArray::kLengthOffset));  // smis.
-    if (IsGrowStoreMode(store_mode)) {
-      __ j(above_equal, &grow);
-    } else {
-      __ j(above_equal, &miss_force_generic);
-    }
-  } else {
-    // Check that the key is within bounds.
-    __ cmp(ecx, FieldOperand(edi, FixedArray::kLengthOffset));  // smis.
-    __ j(above_equal, &miss_force_generic);
-  }
-
-  __ bind(&finish_store);
-  __ StoreNumberToDoubleElements(eax, edi, ecx, edx, xmm0,
-                                 &transition_elements_kind, true);
-  __ ret(0);
-
-  // Handle store cache miss, replacing the ic with the generic stub.
-  __ bind(&miss_force_generic);
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_MissForceGeneric);
-
-  // Handle transition to other elements kinds without using the generic stub.
-  __ bind(&transition_elements_kind);
-  TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Miss);
-
-  if (is_js_array && IsGrowStoreMode(store_mode)) {
-    // Handle transition requiring the array to grow.
-    __ bind(&grow);
-
-    // Make sure the array is only growing by a single element, anything else
-    // must be handled by the runtime. Flags are already set by previous
-    // compare.
-    __ j(not_equal, &miss_force_generic);
-
-    // Transition on values that can't be stored in a FixedDoubleArray.
-    Label value_is_smi;
-    __ JumpIfSmi(eax, &value_is_smi);
-    __ cmp(FieldOperand(eax, HeapObject::kMapOffset),
-           Immediate(Handle<Map>(masm->isolate()->heap()->heap_number_map())));
-    __ j(not_equal, &transition_elements_kind);
-    __ bind(&value_is_smi);
-
-    // Check for the empty array, and preallocate a small backing store if
-    // possible.
-    __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-    __ cmp(edi, Immediate(masm->isolate()->factory()->empty_fixed_array()));
-    __ j(not_equal, &check_capacity);
-
-    int size = FixedDoubleArray::SizeFor(JSArray::kPreallocatedArrayElements);
-    __ Allocate(size, edi, ebx, ecx, &prepare_slow, TAG_OBJECT);
-
-    // Restore the key, which is known to be the array length.
-    __ mov(ecx, Immediate(0));
-
-    // eax: value
-    // ecx: key
-    // edx: receiver
-    // edi: elements
-    // Initialize the new FixedDoubleArray.
-    __ mov(FieldOperand(edi, JSObject::kMapOffset),
-           Immediate(masm->isolate()->factory()->fixed_double_array_map()));
-    __ mov(FieldOperand(edi, FixedDoubleArray::kLengthOffset),
-           Immediate(Smi::FromInt(JSArray::kPreallocatedArrayElements)));
-
-    __ StoreNumberToDoubleElements(eax, edi, ecx, ebx, xmm0,
-                                   &transition_elements_kind, true);
-
-    for (int i = 1; i < JSArray::kPreallocatedArrayElements; i++) {
-      int offset = FixedDoubleArray::OffsetOfElementAt(i);
-      __ mov(FieldOperand(edi, offset), Immediate(kHoleNanLower32));
-      __ mov(FieldOperand(edi, offset + kPointerSize),
-             Immediate(kHoleNanUpper32));
-    }
-
-    // Install the new backing store in the JSArray.
-    __ mov(FieldOperand(edx, JSObject::kElementsOffset), edi);
-    __ RecordWriteField(edx, JSObject::kElementsOffset, edi, ebx,
-                        kDontSaveFPRegs, EMIT_REMEMBERED_SET, OMIT_SMI_CHECK);
-
-    // Increment the length of the array.
-    __ add(FieldOperand(edx, JSArray::kLengthOffset),
-           Immediate(Smi::FromInt(1)));
-    __ mov(edi, FieldOperand(edx, JSObject::kElementsOffset));
-    __ ret(0);
-
-    __ bind(&check_capacity);
-    // eax: value
-    // ecx: key
-    // edx: receiver
-    // edi: elements
-    // Make sure that the backing store can hold additional elements.
-    __ cmp(ecx, FieldOperand(edi, FixedDoubleArray::kLengthOffset));
-    __ j(above_equal, &slow);
-
-    // Grow the array and finish the store.
-    __ add(FieldOperand(edx, JSArray::kLengthOffset),
-           Immediate(Smi::FromInt(1)));
-    __ jmp(&finish_store);
-
-    __ bind(&prepare_slow);
-    // Restore the key, which is known to be the array length.
-    __ mov(ecx, Immediate(0));
-
-    __ bind(&slow);
-    TailCallBuiltin(masm, Builtins::kKeyedStoreIC_Slow);
-  }
-}
-
-
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32