Add<HTrapAllocationMemento>(js_array);
}
- HInstruction* array_length =
- AddLoad(js_array, HObjectAccess::ForArrayLength());
- array_length->set_type(HType::Smi());
+ HInstruction* elements = AddLoadElements(js_array);
+
+ HInstruction* empty_fixed_array = Add<HConstant>(
+ isolate()->factory()->empty_fixed_array(), Representation::Tagged());
IfBuilder if_builder(this);
- if_builder.IfNot<HCompareNumericAndBranch>(array_length,
- graph()->GetConstant0(),
- Token::EQ);
- if_builder.Then();
+ if_builder.IfNot<HCompareObjectEqAndBranch>(elements, empty_fixed_array);
- HInstruction* elements = AddLoadElements(js_array);
+ if_builder.Then();
HInstruction* elements_length = AddLoadFixedArrayLength(elements);
+ HInstruction* array_length = AddLoad(
+ js_array, HObjectAccess::ForArrayLength(), NULL, Representation::Smi());
+ array_length->set_type(HType::Smi());
+
BuildGrowElementsCapacity(js_array, elements, from_kind, to_kind,
array_length, elements_length);
--- /dev/null
+// Copyright 2013 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
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --compiled-transitions
+// Flags: --track-allocation-sites
+
+// Allocation site for empty double arrays.
+function foo() {
+ return new Array();
+}
+var a = foo();
+a[0] = 1.1;
+
+// Emit a TransitionElementsKindStub which transitions from double to object.
+function store(a,x) {
+ a[0] = x;
+}
+store([1.1], 'a');
+store([1.1], 1.1);
+%OptimizeFunctionOnNextCall(store);
+
+// Use the TransitionElementsKindStub to transition from double to object.
+var b = foo();
+store(b, 'a');