Reid Kleckner fb502d2f5e [IR] Make paramHasAttr to use arg indices instead of attr indices ...

This avoids the confusing 'CS.paramHasAttr(ArgNo + 1, Foo)' pattern.

Previously we were testing return value attributes with index 0, so I
introduced hasReturnAttr() for that use case.

llvm-svn: 300367

2017-04-14 20:19:02 +00:00

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