[llvm-dev] Opt vs Clang

Johannes Doerfert via llvm-dev llvm-dev at lists.llvm.org
Fri Mar 13 23:19:37 PDT 2020

The opt flag does prevent opt from printing/saving the resulting IR. opt
will instead asks the passes to "print" a summary of what they did.

The clang flag enables and saves remarks
Remarks are printed by some passes while they perform their actions.

On 03/12, Ashwin Jose via llvm-dev wrote:
> What is the difference between the report generated by clang's
> -fsave-optimization-record flag and opt's -analyze flag?

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Johannes Doerfert

Argonne National Laboratory
Lemont, IL 60439, USA

jdoerfert at anl.gov
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