https://bugs.webkit.org/show_bug.cgi?id=95898

Reviewed by Geoff Garen.

Simplify the AST.
This will also mean we have access to m_subscriptHasAssignments when generating a prefix/postfix op applied to a bracket access.

* bytecompiler/NodesCodegen.cpp:
(JSC::PostfixNode::emitResolve):
    - was PostfixResolveNode::emitBytecode
(JSC::PostfixNode::emitBracket):
    - was PostfixBracketNode::emitBytecode
(JSC::PostfixNode::emitDot):
    - was PostfixDotNode::emitBytecode
(JSC::PostfixNode::emitBytecode):
    - was PostfixErrorNode::emitBytecode, call resolve/bracket/dot version as appropriate.
(JSC::PrefixNode::emitResolve):
    - was PrefixResolveNode::emitBytecode
(JSC::PrefixNode::emitBracket):
    - was PrefixBracketNode::emitBytecode
(JSC::PrefixNode::emitDot):
    - was PrefixDotNode::emitBytecode
(JSC::PrefixNode::emitBytecode):
    - was PrefixErrorNode::emitBytecode, call resolve/bracket/dot version as appropriate.
* parser/ASTBuilder.h:
(JSC::ASTBuilder::makePrefixNode):
    - Just makes a PrefixNode!
(JSC::ASTBuilder::makePostfixNode):
    - Just makes a PostfixNode!
* parser/NodeConstructors.h:
(JSC::PostfixNode::PostfixNode):
    - Added, merge of PostfixResolveNode/PostfixBracketNode/PostfixDotNode/PostfixErrorNode.
(JSC::PrefixNode::PrefixNode):
    - Added, merge of PrefixResolveNode/PrefixBracketNode/PrefixDotNode/PrefixErrorNode.
* parser/Nodes.h:
(PostfixNode):
    - Added, merge of PostfixResolveNode/PostfixBracketNode/PostfixDotNode/PostfixErrorNode.
(PrefixNode):
    - Added, merge of PrefixResolveNode/PrefixBracketNode/PrefixDotNode/PrefixErrorNode.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@127654 268f45cc-cd09-0410-ab3c-d52691b4dbfc