codeql

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Tom Hvitved d707c526e5 Ruby: Avoid computing full fastTC for AstNode::getParent

DIL before
```
                                  /* AST::AstNode */ AST#87953007::Cached::TAstNode result) =
  fastTC(Module#fe82a56b::parent#1#ff/2)
.

Module#fe82a56b::enclosingModule#1#ff(/* AST::AstNode */ AST#87953007::Cached::TAstNode node,
                                      /* Module::ModuleBase */ AST#87953007::Cached::TAstNode result)
:-
  exists(/* AST::AstNode */ AST#87953007::Cached::TAstNode call_result#2 |
    Module#2a43f566::ModuleBase#f(result),
    project#AST#a6718388::AstNode::getAChild#1#dispred(result, call_result#2),
    (
      node = call_result#2;
      #Module#fe82a56b::parent#1Plus#ff(node, call_result#2)
    )
  )
.
```

DIL after
```
incremental
Module#fe82a56b::enclosingModule#1#ff(/* AST::AstNode */ AST#87953007::Cached::TAstNode node,
                                      /* Module::ModuleBase */ AST#87953007::Cached::TAstNode result)
:-
  (
    Module#2a43f566::ModuleBase#f(result),
    exists(cached dontcare string _ |
      AST#a6718388::AstNode::getAChild#1#dispred(result, _, node)
    )
  );
  exists(/* AST::AstNode */ AST#87953007::Cached::TAstNode mid |
    Module#2a43f566::ModuleBase#f(result),
    rec Module#fe82a56b::enclosingModule#1#ff(mid, result),
    not(Module#2a43f566::ModuleBase#f(mid)),
    not(Method#8b49e67f::Block#f(mid)),
    exists(cached dontcare string _ |
      AST#a6718388::AstNode::getAChild#1#dispred(mid, _, node)
    )
  )
| [base_case]
  Module#2a43f566::ModuleBase#f(result),
  project#AST#a6718388::AstNode::getAChild#1#dispred(result, node)
| [delta_order]
  exists(/* AST::AstNode */ AST#87953007::Cached::TAstNode mid |
    Module#2a43f566::ModuleBase#f(result),
    delta previous rec Module#fe82a56b::enclosingModule#1#ff(mid, result),
    not(Module#2a43f566::ModuleBase#f(mid)),
    not(Method#8b49e67f::Block#f(mid)),
    project#AST#a6718388::AstNode::getAChild#1#dispred(mid, node)
  ),
  not(previous rec Module#fe82a56b::enclosingModule#1#ff(node, result))
| [delta_order_up_to_500000]
  exists(/* AST::AstNode */ AST#87953007::Cached::TAstNode mid |
    delta previous rec Module#fe82a56b::enclosingModule#1#ff(mid, result),
    Module#2a43f566::ModuleBase#f(result),
    not(Module#2a43f566::ModuleBase#f(mid)),
    not(Method#8b49e67f::Block#f(mid)),
    project#AST#a6718388::AstNode::getAChild#1#dispred(mid, node)
  ),
  not(previous rec Module#fe82a56b::enclosingModule#1#ff(node, result))
.
```

2022-10-09 11:10:33 +02:00