https://bugs.webkit.org/show_bug.cgi?id=68318

Reviewed by Gavin Barraclough.
        
Adds Math.min, Math.max, and Math.sqrt intrinsics. Adds support for
a function to have an intrinsic but not a thunk generator. This is
a 7% speed-up on access-nbody, and neutral elsewhere, mainly because
we're still not DFG compiling the bulk of the hot code in Kraken audio
benchmarks.

* create_hash_table:
* dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::handleMinMax):
(JSC::DFG::ByteCodeParser::handleIntrinsic):
* dfg/DFGIntrinsic.h:
* dfg/DFGNode.h:
* dfg/DFGPropagator.cpp:
(JSC::DFG::Propagator::propagateNode):
(JSC::DFG::Propagator::fixupNode):
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* jit/JITStubs.cpp:
(JSC::JITThunks::hostFunctionStub):
* runtime/Lookup.cpp:
(JSC::setUpStaticFunctionSlot):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95399 268f45cc-cd09-0410-ab3c-d52691b4dbfc