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codeql/cpp/ql
Dave Bartolomeo e30e163081 C#: Implement IRType
This commit implements the language-neutral IR type system for C#. It mostly follows the same pattern as C++, modified to fit the C# type system. All object references, pointers, and lvalues are represented as `IRAddress` types. All structs and generic parameters are implemented as `IRBlobType`. Function addresses get a single `IRFunctionAddressType`.

I had to fix a couple places in the original IR type system where I didn't realize I was still depending on language-specific types. As part of this, `CSharpType` and `CppType` now have a `hasUnspecifiedType()` predicate, which is equivalent to `hasType()`, except that it holds only for the unspecified version of the type. This predicate can go away once we remove the IR's references to the underlying `Type` objects.

All C# IR tests pass without modification, but only because this commit continues to print the name of `IRUnknownType` as `null`, and `IRFunctionAddressType` as `glval<null>`. These will be fixed separately in a subsequent commit in this PR.
2019-09-26 15:47:52 -07:00
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2019-09-26 15:47:52 -07:00