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Add option to print preprocessed P4 and continue with compilation #5152

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kfcripps opened this issue Feb 27, 2025 · 2 comments · May be fixed by #5153
Open

Add option to print preprocessed P4 and continue with compilation #5152

kfcripps opened this issue Feb 27, 2025 · 2 comments · May be fixed by #5153
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core Topics concerning the core segments of the compiler (frontend, midend, parser)

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@kfcripps
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kfcripps commented Feb 27, 2025 •
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When the -E option is provided, the compiler prints the contents of the preprocessed P4 file, and exits. It would be nice if there existed an option to do the same (and maybe print the preprocessed P4 to some output file in the --dump directory instead of to stdout), but continue with compilation instead of exiting. Is there any reason to not add such an option?
@kfcripps kfcripps added core Topics concerning the core segments of the compiler (frontend, midend, parser) enhancement labels Feb 27, 2025
@kfcripps kfcripps self-assigned this Feb 27, 2025
@asl
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asl commented Feb 27, 2025

Normally such option is called --save-temps for C/C++ compilers

@vgurevich
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vgurevich commented Feb 27, 2025 •
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Actually, Tofino compiler does it already by default, but this is done by the compiler driver (p4c or bf-p4c) (by invoking CPP with the proper parameters) and not by the backend (p4c-barefoot) itself.

@kfcripps kfcripps linked a pull request Feb 27, 2025 that will close this issue
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