After removing host operations from the device MLIR module, it is no
longer necessary to provide special codegen logic to prevent these
operations from causing compiler crashes or miscompilations.
This patch removes these now unnecessary code paths to simplify codegen
logic. Some MLIR tests are now replaced with Flang tests, since the
responsibility of dealing with host operations has been moved earlier in
the compilation flow.
MLIR tests holding target device modules are updated to no longer
include now unsupported host operations.
This directory can be used to add Integration tests involving multiple stages of the compiler (for eg. from Fortran to LLVM IR). It should not contain executable tests. We should only add tests here sparingly and only if there is no other way to test. Repeat this message in each test that is added to this directory and sub-directories.
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