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
This patch fixes a bug in the AMDGPU Propagate Attributes pass where a call
instruction with a function pointer argument is identified as a user of the
passed function, and illegally replaces the called function of the
instruction with the function argument.
For example, given functions f and g with appropriate types, the following
illegal transformation could occur without this fix:
call void @f(void ()* @g)
-->
call void @g(void ()* @g.1)
The solution introduced in this patch is to prevent the cloning and
substitution if the instruction's called function and the function which
might be cloned do not match.
Reviewed By: arsenm, madhur13490
Differential Revision: https://reviews.llvm.org/D101847
Jon Chesterfield