Switch lowering improvements

Sep 9, 2017



Switch lowering is well observed area and subject of many technical papers. The talk will provide various interesting statistics collected on thousands of packages in openSUSE distribution. These numbers provide clue about which optimizations should be selected and added to the compiler. Apart from that I would like to present results of an experimental branch where the GCC can make decisions based on profile feedback in order to generate fast code of switch statements.


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The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, and Go, as well as libraries for these languages (libstdc++,...). GCC was originally written as the compiler for the GNU operating system. The GNU system was developed to be 100% free software, free in the sense that it respects the user's freedom.

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