[LLVMbugs] [Bug 15334] CallSite::getCalledFunction returns null if the function callee pointer is a bitcast

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15334

Chris Lattner <clattner at apple.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Chris Lattner <clattner at apple.com> ---
This is by design: without this, the returned function's prototype won't match
the arguments to the call, which can break a lot of invariants.

Instcombine will turn call of bitcast into a direct call in many cases.

That said, I agree that the Callgraph being pessimized is a bad thing.  If this
is happening in the standard optimization flow, please bring this up on a
thread on the llvmdev mailing list.  Bugzilla is not a great place to talk
about design issues.

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