https://bugs.webkit.org/show_bug.cgi?id=115939

Reviewed by Oliver Hunt and Mark Hahnenberg.

The most interesting part of this patch is the way I make it easier to deal with
the inputs to Phi functions. This adds the notion of ValueFromBlock, which you
can get by doing m_out.anchor(value). You can build up a vector of these, and then
pass them to m_out.phi(type, vector) in one go.

* JavaScriptCore.xcodeproj/project.pbxproj:
* ftl/FTLAbbreviatedTypes.h: Added.
(FTL):
* ftl/FTLAbbreviations.h:
(FTL):
(JSC::FTL::addIncoming):
(JSC::FTL::buildPhi):
* ftl/FTLAbstractHeapRepository.h:
(FTL):
* ftl/FTLCapabilities.cpp:
(JSC::FTL::canCompile):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::compileNode):
(JSC::FTL::LowerDFGToLLVM::compileCompareEqConstant):
(LowerDFGToLLVM):
(JSC::FTL::LowerDFGToLLVM::lowDouble):
(JSC::FTL::LowerDFGToLLVM::masqueradesAsUndefinedWatchpointIfIsStillValid):
* ftl/FTLOutput.h:
(JSC::FTL::Output::phi):
(Output):
(JSC::FTL::Output::anchor):
* ftl/FTLValueFromBlock.h: Added.
(FTL):
(ValueFromBlock):
(JSC::FTL::ValueFromBlock::ValueFromBlock):
(JSC::FTL::ValueFromBlock::value):
(JSC::FTL::ValueFromBlock::block):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@153154 268f45cc-cd09-0410-ab3c-d52691b4dbfc