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dummyba
2017 Dec 15
2
RFC: Exposing TargetTransformInfo factories from TargetMachine
...to make architecture
specific code generation decisions from the XLA LLVM IR emitter[0].
However, we don't have a great way to do this today --
TargetTransformInfo is wrapped in a TargetIRAnalysis and getting the
TargetTransformInfo out of it requires something like:
FunctionAnalysisManager DummyFAM;
TTI = TIRA.run(F, DummyFAM);
return *TTI;
which isn't ideal.
Given that all in-tree backends have a factory function to directly
construct a TargetTransformInfo implementation anyway, what do you
think about exposing said factory function from the TargetMachine
subclasses directly? Some...