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Just initialize elements pointer in fast literal when pre-tenuring.

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BUG=
R=ishell@chromium.org

Review URL: https://codereview.chromium.org/148253004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@19056 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
hpayer@chromium.org 2014-02-04 10:41:16 +00:00
parent 2afcfc0b0e
commit 8d1504b238
1 changed files with 7 additions and 6 deletions
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13
src/hydrogen.cc
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@ -9910,12 +9910,13 @@ HInstruction* HOptimizedGraphBuilder::BuildFastLiteral(
HValue* object_elements_size = Add<HConstant>(elements_size);
if (boilerplate_object->HasFastDoubleElements()) {
// Allocation folding will not be able to fold |object| and
// |object_elements| together in some cases, so initialize
// elements with the undefined to make GC happy.
HConstant* empty_fixed_array = Add<HConstant>(
isolate()->factory()->empty_fixed_array());
Add<HStoreNamedField>(object, HObjectAccess::ForElementsPointer(),
empty_fixed_array, INITIALIZING_STORE);
// |object_elements| together if they are pre-tenured.
if (pretenure_flag == TENURED) {
HConstant* empty_fixed_array = Add<HConstant>(
isolate()->factory()->empty_fixed_array());
Add<HStoreNamedField>(object, HObjectAccess::ForElementsPointer(),
empty_fixed_array, INITIALIZING_STORE);
}
object_elements = Add<HAllocate>(object_elements_size, HType::JSObject(),
pretenure_flag, FIXED_DOUBLE_ARRAY_TYPE, site_context->current());
} else {