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[flang] Use integer arith.max/min operations for max/min lowering. #186466
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[flang] Use integer arith.max/min operations for max/min lowering.
vzakhari f74e1f1
Added conversions for unsigned types.
vzakhari 6e40b17
Unused vars.
vzakhari cba9355
Added lowering tests for unsigned types.
vzakhari d31e4c1
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According to https://mlir.llvm.org/docs/Dialects/ArithOps/#arithmaxui-arithmaxuiop ,
maxUIOprequires signless integers. It seems that the original code was creating signless integers forleftandright, but the new code doesn't.I quickly checked the tests modifications and it seems all existing tests work with signed args. Perhaps add some unsigned tests to see if not having explicitly signless integers is a problem?
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Good catch, Eugene! I need to bring back those converts. Unfortunately, I do not know a way to wrtie such a test, because
unsignedargument ofmax/minis rejected by semantics.There was a problem hiding this comment.
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I'll look into this. Maybe I'll at least give you a temporary patch to get past the error, so the unsigned code could be tested.
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Maybe you could test it via some FIR to FIR tests starting with hlfir.maxval on unsigned (if we allow it).
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@vzakhari , the following worked for me with upstream flang:
Compile with
-funsigned.There was a problem hiding this comment.
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Indeed, it works. Thank you, Eugene. I did see some semantics errors, but I must have done some mistake in the code. I will add the tests!