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Llvm optimization

The list of available LLVM passes is described here . I am interested to know what passes are included for different optimization levels. For example, for -O2 that passes, included. Is there any website or document that provides this information.

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It appears in the PassManagerBuilder.cpp file. Take a look at the populateModulePassManager method, where OptLevel is an integer that follows the -O option.



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from the command line you can use:



echo "" | opt -O3 -disable-output -debug-pass=Arguments
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