Sean Silva 45835e731d Remove dead TLI arg of isKnownNonNull and propagate deadness. NFC. ...

This actually uncovered a surprisingly large chain of ultimately unused
TLI args.
From what I can gather, this argument is a remnant of when
isKnownNonNull would look at the TLI directly.
The current approach seems to be that InferFunctionAttrs runs early in
the pipeline and uses TLI to annotate the TLI-dependent non-null
information as return attributes.

This also removes the dependence of functionattrs on TLI altogether.

llvm-svn: 274455

2016-07-02 23:47:27 +00:00

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