Colin.cpp

-fno-ipa-vrp (disable interprocedural value range propagation)

-fipa-vrp (enable interprocedural value range propagation)

-fno-ipa-icf (disable interprocedural common function merging)

-fipa-icf (enable interprocedural common function merging)

-fno-tree-copyrename (disable renaming tree expressions during optimization)

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