Drop obsolete HCheckMaps::HandleSideEffectsDominator().

In HCheckMaps::HandleSideEffectsDominator() we try to remove
redundant HCheckMaps instructions that are dominated by an
HStoreNamedField instruction with a transition. This is just
a special case of the check elimination and therefore obsolete
(it also gives some nice speedup since GVN just got cheaper).

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/261003002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21108 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Object.defineProperty shouldn't be a hint that we're constructing a dictionary.

BUG=362870
LOG=y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/261583004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21109 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Don't add code dependencies on transitioning stores eagerly.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/256303007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21110 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix |RunMicrotasks()| leaking reference to the last context being run on.

RunMicrotasks() executes pending tasks and swaps the old array with a new array. However, the new array contains the reference to the current context as its creation context. This prevents the context from gc-ed until RunMicrotasks() is executed in the different context.

BUG=crbug.com/367016
LOG=y
R=rafaelw@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/250883002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21111 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix crash in debug builds introduced with r21110.

Basically we should not check for map deprecation during
code selection, because that may run on the concurrent
compiler thread. So the fix is to move this logic to the
code generation phase instead, which is always run on the
main thread.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/263803005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21112 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Make zone_allocator actually usable.

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/267803005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21113 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Generation of our home-grown memmove doesn't depend on serializer state anymore.

The serializer state has to be per-Isolate, but at the point where we
generate our memmoves we don't really have an Isolate. Furthermore,
there was no fundamental reason why we shouldn't use our home-grown
memmove during mksnapshot time.

Perhaps we can totally remove our own memmove nowadays, but this would
be a separate CL.

BUG=359977
LOG=y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/261903002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21116 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Map::Normalize() introduced as single entry point for map normalization and Map::NotifyLeafMapLayoutChange() made private.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/263663002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21117 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Checks for empty array case added before casting elements to FixedDoubleArray.

BUG=chromium:369450
LOG=N
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/264973008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21118 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/master'