Reviewed by Maciej.

        Bug 19484: More instructions needs to use temporary registers
        <https://bugs.webkit.org/show_bug.cgi?id=19484>

        Fix codegen for all binary operations so that temporaries are used if
        necessary. This was done by making BinaryOpNode and ReverseBinaryOpNode
        subclasses of ExpressionNode, and eliminating the custom emitCode()
        methods for the individual node classes.

        This only adds 3 new instructions to SunSpider code, and there is no
        difference in SunSpider execution time.

        JavaScriptCore:

        * VM/CodeGenerator.cpp:
        (KJS::CodeGenerator::emitBitNot):
        (KJS::CodeGenerator::emitBinaryOp):
        * VM/CodeGenerator.h:
        * kjs/grammar.y:
        * kjs/nodes.cpp:
        (KJS::PreIncResolveNode::emitCode):
        (KJS::PreDecResolveNode::emitCode):
        (KJS::BinaryOpNode::emitCode):
        (KJS::ReverseBinaryOpNode::emitCode):
        (KJS::emitReadModifyAssignment):
        (KJS::CaseBlockNode::emitCodeForBlock):
        * kjs/nodes.h:
        (KJS::BinaryOpNode::BinaryOpNode):
        (KJS::ReverseBinaryOpNode::ReverseBinaryOpNode):
        (KJS::MultNode::):
        (KJS::DivNode::):
        (KJS::DivNode::precedence):
        (KJS::ModNode::):
        (KJS::ModNode::precedence):
        (KJS::AddNode::):
        (KJS::AddNode::precedence):
        (KJS::SubNode::):
        (KJS::SubNode::precedence):
        (KJS::LeftShiftNode::):
        (KJS::LeftShiftNode::precedence):
        (KJS::RightShiftNode::):
        (KJS::RightShiftNode::precedence):
        (KJS::UnsignedRightShiftNode::):
        (KJS::UnsignedRightShiftNode::precedence):
        (KJS::LessNode::):
        (KJS::LessNode::precedence):
        (KJS::GreaterNode::):
        (KJS::GreaterNode::precedence):
        (KJS::LessEqNode::):
        (KJS::LessEqNode::precedence):
        (KJS::GreaterEqNode::):
        (KJS::GreaterEqNode::precedence):
        (KJS::InstanceOfNode::):
        (KJS::InstanceOfNode::precedence):
        (KJS::InNode::):
        (KJS::InNode::precedence):
        (KJS::EqualNode::):
        (KJS::EqualNode::precedence):
        (KJS::NotEqualNode::):
        (KJS::NotEqualNode::precedence):
        (KJS::StrictEqualNode::):
        (KJS::StrictEqualNode::precedence):
        (KJS::NotStrictEqualNode::):
        (KJS::NotStrictEqualNode::precedence):
        (KJS::BitAndNode::):
        (KJS::BitAndNode::precedence):
        (KJS::BitOrNode::):
        (KJS::BitOrNode::precedence):
        (KJS::BitXOrNode::):
        (KJS::BitXOrNode::precedence):
        * kjs/nodes2string.cpp:
        (KJS::LessNode::streamTo):
        (KJS::GreaterNode::streamTo):
        (KJS::LessEqNode::streamTo):
        (KJS::GreaterEqNode::streamTo):
        (KJS::InstanceOfNode::streamTo):
        (KJS::InNode::streamTo):
        (KJS::EqualNode::streamTo):
        (KJS::NotEqualNode::streamTo):
        (KJS::StrictEqualNode::streamTo):
        (KJS::NotStrictEqualNode::streamTo):
        (KJS::BitAndNode::streamTo):
        (KJS::BitXOrNode::streamTo):
        (KJS::BitOrNode::streamTo):

        LayoutTests:

        * fast/js/codegen-temporaries-expected.txt:
        * fast/js/resources/codegen-temporaries.js:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@34562 268f45cc-cd09-0410-ab3c-d52691b4dbfc