Is it possible to implement target specific optimizations which can be applied after instruction selection or later?

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1

Dear developers.

My question is the same as the title.
Is there any way to implement target specific optimizations after instruction selection or later?

I cannot find any related document. Please let me know.

Thanks in advance.

Minwook Ahn

2

Yes. There are lots of examples of this. For example ARM target has a number of specific optimization passes. See ARMTargetMachine.cpp addPreEmitPass() etc. for examples of how they are added to codegen pass manager.

Evan

3

So if you run the JIT on a module, the content of that module might change?