- ``externally_initialized`` variables would be initialized or modified
elsewhere. Particularly, CUDA or HIP may have host code to initialize
or modify ``externally_initialized`` device variables, which may not
be explicitly referenced on the device side but may still be used
through the host side interfaces. Not preserving them triggers the
elimination of them in the GlobalDCE and breaks the user code.
Reviewed By: yaxunl
Differential Revision: https://reviews.llvm.org/D105135
The internalization pass only internalizes global variables
with no users. If the global variable has some dead user,
the internalization pass will not internalize it.
To be able to internalize global variables with dead
users, a global dce pass is needed before the
internalization pass.
This patch adds that.
Reviewed by: Artem Belevich, Matt Arsenault
Differential Revision: https://reviews.llvm.org/D98783
Michael Liao