madhur13490 6a3beb1f68 [AMDGPU] [IndirectCalls] Don't propagate attributes to address taken functions and their callees ...

Don't propagate launch bound related attributes to
address taken functions and their callees. The idea
is to do a traversal over the call graph starting at
address taken functions and erase the attributes
set by previous logic i.e. process().

This two phase approach makes sure that we don't
miss out on deep nested callees from address taken
functions as a function might be called directly as
well as indirectly.

This patch is also reattempt to D94585 as latent issues
are fixed in hasAddressTaken function in the recent
past.

Reviewed By: arsenm

Differential Revision: https://reviews.llvm.org/D103138

2021-06-04 11:36:56 +05:30

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