EFL: Unsafe branch detected in compilePutByValForFloatTypedArray()
https://bugs.webkit.org/show_bug.cgi?id=112609

Reviewed by Geoffrey Garen.

Created local valueFPR and scratchFPR and filled them with valueOp.fpr() and scratch.fpr()
respectively so that if valueOp.fpr() causes a spill during allocation, it occurs before the
branch and also to follow convention.  Added register allocation checks to FPRTemporary.
Cleaned up a couple of other places to follow the "AllocatVirtualRegType foo, get machine
reg from foo" pattern.

* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compilePutByValForFloatTypedArray):
* dfg/DFGSpeculativeJIT.h:
(JSC::DFG::SpeculativeJIT::fprAllocate):
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::convertToDouble):
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@146174 268f45cc-cd09-0410-ab3c-d52691b4dbfc