Refactor elements kind conversion.

src/arm/code-stubs-arm.cc

 // Copyright 2011 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 6918 matching lines @@
   // Used in CompileStoreGlobal.
   { r4, r1, r2, OMIT_REMEMBERED_SET },
   // Used in StoreStubCompiler::CompileStoreField via GenerateStoreField.
   { r1, r2, r3, EMIT_REMEMBERED_SET },
   { r3, r2, r1, EMIT_REMEMBERED_SET },
   // Used in KeyedStoreStubCompiler::CompileStoreField via GenerateStoreField.
   { r2, r1, r3, EMIT_REMEMBERED_SET },
   { r3, r1, r2, EMIT_REMEMBERED_SET },
   // KeyedStoreStubCompiler::GenerateStoreFastElement.
   { r4, r2, r3, EMIT_REMEMBERED_SET },
-  // FastElementsConversionStub::GenerateSmiOnlyToObject
-  // and FastElementsConversionStub::GenerateSmiOnlyToDouble
-  // and FastElementsConversionStub::GenerateDoubleToObject
+  // ElementsTransitionGenerator::GenerateSmiOnlyToObject
+  // and ElementsTransitionGenerator::GenerateSmiOnlyToDouble
+  // and ElementsTransitionGenerator::GenerateDoubleToObject
   { r2, r3, r9, EMIT_REMEMBERED_SET },
-  // FastElementsConversionStub::GenerateDoubleToObject
+  // ElementsTransitionGenerator::GenerateDoubleToObject
   { r6, r2, r0, EMIT_REMEMBERED_SET },
   { r2, r6, r9, EMIT_REMEMBERED_SET },
   // Null termination.
   { no_reg, no_reg, no_reg, EMIT_REMEMBERED_SET}
 };
 
 
 bool RecordWriteStub::IsPregenerated() {
   for (AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime;
        !entry->object.is(no_reg);
@@ skipping 218 matching lines @@
   }
 
   __ bind(&need_incremental_pop_scratch);
   __ Pop(regs_.object(), regs_.address());
 
   __ bind(&need_incremental);
 
   // Fall through when we need to inform the incremental marker.
 }
 
-
-void FastElementsConversionStub::GenerateSmiOnlyToObject(
-    MacroAssembler* masm,
-    StrictModeFlag strict_mode) {
-  // ----------- S t a t e -------------
-  //  -- r0    : value
-  //  -- r1    : key
-  //  -- r2    : receiver
-  //  -- lr    : return address
-  //  -- r3    : target map, scratch for subsequent call
-  //  -- r4    : scratch (elements)
-  // -----------------------------------
-  // Set transitioned map.
-  __ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
-  __ RecordWriteField(r2,
-                      HeapObject::kMapOffset,
-                      r3,
-                      r9,
-                      kLRHasNotBeenSaved,
-                      kDontSaveFPRegs,
-                      EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-}
-
-
-void FastElementsConversionStub::GenerateSmiOnlyToDouble(
-    MacroAssembler* masm, StrictModeFlag strict_mode) {
-  // ----------- S t a t e -------------
-  //  -- r0    : value
-  //  -- r1    : key
-  //  -- r2    : receiver
-  //  -- lr    : return address
-  //  -- r3    : target map, scratch for subsequent call
-  //  -- r4    : scratch (elements)
-  // -----------------------------------
-  Label loop, entry, convert_hole, gc_required, fail;
-  bool vfp3_supported = CpuFeatures::IsSupported(VFP3);
-
-  __ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
-  __ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
-  // r4: source FixedArray
-  // r5: number of elements (smi-tagged)
-
-  // Allocate new FixedDoubleArray.
-  __ mov(ip, Operand(FixedDoubleArray::kHeaderSize));
-  __ add(ip, ip, Operand(r5, LSL, 2));
-  __ AllocateInNewSpace(ip, r6, r7, r9, &gc_required, NO_ALLOCATION_FLAGS);
-  // r6: destination FixedDoubleArray, not tagged as heap object
-  __ LoadRoot(r9, Heap::kFixedDoubleArrayMapRootIndex);
-  __ str(r9, MemOperand(r6, HeapObject::kMapOffset));
-  // Set destination FixedDoubleArray's length.
-  __ str(r5, MemOperand(r6, FixedDoubleArray::kLengthOffset));
-  // Update receiver's map.
-  __ push(lr);
-  __ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
-  __ RecordWriteField(r2,
-                      HeapObject::kMapOffset,
-                      r3,
-                      r9,
-                      kLRHasBeenSaved,
-                      kDontSaveFPRegs,
-                      EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  // Replace receiver's backing store with newly created FixedDoubleArray.
-  __ add(r3, r6, Operand(kHeapObjectTag));
-  __ str(r3, FieldMemOperand(r2, JSObject::kElementsOffset));
-  __ RecordWriteField(r2,
-                      JSObject::kElementsOffset,
-                      r3,
-                      r9,
-                      kLRHasBeenSaved,
-                      kDontSaveFPRegs,
-                      EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  __ pop(lr);
-
-  // Prepare for conversion loop.
-  __ add(r3, r4, Operand(FixedArray::kHeaderSize - kHeapObjectTag));
-  __ add(r7, r6, Operand(FixedDoubleArray::kHeaderSize));
-  __ add(r6, r7, Operand(r5, LSL, 2));
-  __ mov(r4, Operand(kHoleNanLower32));
-  __ mov(r5, Operand(kHoleNanUpper32));
-  // r3: begin of source FixedArray element fields, not tagged
-  // r4: kHoleNanLower32
-  // r5: kHoleNanUpper32
-  // r6: end of destination FixedDoubleArray, not tagged
-  // r7: begin of FixedDoubleArray element fields, not tagged
-  if (vfp3_supported) __ Push(r1, r0);
-
-  __ b(&entry);
-
-  // Call into runtime if GC is required.
-  __ bind(&gc_required);
-  KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
-
-  // Convert and copy elements.
-  __ bind(&loop);
-  __ ldr(r9, MemOperand(r3, 4, PostIndex));
-  // r9: current element
-  __ JumpIfNotSmi(r9, &convert_hole);
-
-  // Normal smi, convert to double and store.
-  __ SmiUntag(r9);
-  if (vfp3_supported) {
-    CpuFeatures::Scope scope(VFP3);
-    __ vmov(s0, r9);
-    __ vcvt_f64_s32(d0, s0);
-    __ vstr(d0, r7, 0);
-    __ add(r7, r7, Operand(8));
-  } else {
-    FloatingPointHelper::ConvertIntToDouble(masm,
-                                            r9,
-                                            FloatingPointHelper::kCoreRegisters,
-                                            d0,
-                                            r0,
-                                            r1,
-                                            ip,
-                                            s0);
-    __ Strd(r0, r1, MemOperand(r7, 8, PostIndex));
-  }
-  __ b(&entry);
-
-  // Hole found, store the-hole NaN.
-  __ bind(&convert_hole);
-  __ Strd(r4, r5, MemOperand(r7, 8, PostIndex));
-
-  __ bind(&entry);
-  __ cmp(r7, r6);
-  __ b(lt, &loop);
-
-  if (vfp3_supported) __ Pop(r1, r0);
-}
-
-
-void FastElementsConversionStub::GenerateDoubleToObject(
-    MacroAssembler* masm, StrictModeFlag strict_mode) {
-  // ----------- S t a t e -------------
-  //  -- r0    : value
-  //  -- r1    : key
-  //  -- r2    : receiver
-  //  -- lr    : return address
-  //  -- r3    : target map, scratch for subsequent call
-  //  -- r4    : scratch (elements)
-  // -----------------------------------
-  Label entry, loop, convert_hole, gc_required;
-
-  __ push(lr);
-  __ Push(r3, r2, r1, r0);
-
-  __ ldr(r4, FieldMemOperand(r2, JSObject::kElementsOffset));
-  __ ldr(r5, FieldMemOperand(r4, FixedArray::kLengthOffset));
-  // r4: source FixedDoubleArray
-  // r5: number of elements (smi-tagged)
-
-  // Allocate new FixedArray.
-  __ mov(r0, Operand(FixedDoubleArray::kHeaderSize));
-  __ add(r0, r0, Operand(r5, LSL, 1));
-  __ AllocateInNewSpace(r0, r6, r7, r9, &gc_required, NO_ALLOCATION_FLAGS);
-  // r6: destination FixedArray, not tagged as heap object
-  __ LoadRoot(r9, Heap::kFixedArrayMapRootIndex);
-  __ str(r9, MemOperand(r6, HeapObject::kMapOffset));
-  // Set destination FixedDoubleArray's length.
-  __ str(r5, MemOperand(r6, FixedDoubleArray::kLengthOffset));
-
-  // Prepare for conversion loop.
-  __ add(r4, r4, Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag + 4));
-  __ add(r3, r6, Operand(FixedArray::kHeaderSize));
-  __ add(r6, r6, Operand(kHeapObjectTag));
-  __ add(r5, r3, Operand(r5, LSL, 1));
-  __ LoadRoot(r7, Heap::kTheHoleValueRootIndex);
-  __ LoadRoot(r9, Heap::kHeapNumberMapRootIndex);
-  // Using offsetted addresses in r4 to fully take advantage of post-indexing.
-  // r3: begin of destination FixedArray element fields, not tagged
-  // r4: begin of source FixedDoubleArray element fields, not tagged, +4
-  // r5: end of destination FixedArray, not tagged
-  // r6: destination FixedArray
-  // r7: the-hole pointer
-  // r9: heap number map
-  __ b(&entry);
-
-  // Call into runtime if GC is required.
-  __ bind(&gc_required);
-  __ Pop(r3, r2, r1, r0);
-  __ pop(lr);
-  KeyedStoreIC::GenerateRuntimeSetProperty(masm, strict_mode);
-
-  __ bind(&loop);
-  __ ldr(r1, MemOperand(r4, 8, PostIndex));
-  // lr: current element's upper 32 bit
-  // r4: address of next element's upper 32 bit
-  __ cmp(r1, Operand(kHoleNanUpper32));
-  __ b(eq, &convert_hole);
-
-  // Non-hole double, copy value into a heap number.
-  __ AllocateHeapNumber(r2, r0, lr, r9, &gc_required);
-  // r2: new heap number
-  __ ldr(r0, MemOperand(r4, 12, NegOffset));
-  __ Strd(r0, r1, FieldMemOperand(r2, HeapNumber::kValueOffset));
-  __ mov(r0, r3);
-  __ str(r2, MemOperand(r3, 4, PostIndex));
-  __ RecordWrite(r6,
-                 r0,
-                 r2,
-                 kLRHasBeenSaved,
-                 kDontSaveFPRegs,
-                 EMIT_REMEMBERED_SET,
-                 OMIT_SMI_CHECK);
-  __ b(&entry);
-
-  // Replace the-hole NaN with the-hole pointer.
-  __ bind(&convert_hole);
-  __ str(r7, MemOperand(r3, 4, PostIndex));
-
-  __ bind(&entry);
-  __ cmp(r3, r5);
-  __ b(lt, &loop);
-
-  __ Pop(r3, r2, r1, r0);
-  // Update receiver's map.
-  __ str(r3, FieldMemOperand(r2, HeapObject::kMapOffset));
-  __ RecordWriteField(r2,
-                      HeapObject::kMapOffset,
-                      r3,
-                      r9,
-                      kLRHasBeenSaved,
-                      kDontSaveFPRegs,
-                      EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  // Replace receiver's backing store with newly created and filled FixedArray.
-  __ str(r6, FieldMemOperand(r2, JSObject::kElementsOffset));
-  __ RecordWriteField(r2,
-                      JSObject::kElementsOffset,
-                      r6,
-                      r9,
-                      kLRHasBeenSaved,
-                      kDontSaveFPRegs,
-                      EMIT_REMEMBERED_SET,
-                      OMIT_SMI_CHECK);
-  __ pop(lr);
-}
-
-
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM