Interprocedural optimization in GCC
Random thoughts on programming languages, compilers, operating systems, etc. Compilers can do a better job optimizing a function if they can use knowledge of other functions. The obvious case is inlining, but there are many more cases. This post lists the interprocedural optimizations implemented in GCC 7. Many of the optimizations are only relevant for large functions (small functions are inlined
GCC Optimization Level Benchmarks With A 4GHz Intel Skylake CPU On Ubuntu 64-bit - Phoronix
GCC Optimization Level Benchmarks With A 4GHz Intel Skylake CPU On Ubuntu 64-bit Written by Michael Larabel in GNU on 28 February 2016 at 05:18 PM EST. 14 Comments With it being trivial to deploy new benchmark test cases with the Phoronix Test Suite and it being fully-automated, the latest results of our Xeon E3 v5 Skylake CPUs are some GCC reference benchmarks with various optimization levels to
革命の日々！ a.out からコンパイラバージョンを取得する方法
忘れないうちにメモ Linuxで普通に実行ファイルつくると.commentセクションとデバッグインフォメーションの 二箇所にコンパイラのバージョンが入ってる。これはobjdumpやreadelfで観測できる。 なぜこんなテクニックを知る必要があるかというとバグ報告で嘘のコンパイラバージョンを 報告してくる輩はけしてレアではないからである １つめ。.comment セクションを objdumpで表示 % objdump -s -j .comment a.out a.out: file format elf64-x86-64 Contents of section .comment: 0000 4743433a 2028474e 55292034 2e342e36 GCC: (GNU) 4.4.6 0010 20323031 32303330 35202852 65642048 2012030
GCC 4.9 Release Series — Changes, New Features, and Fixes - GNU Project
GCC 4.9 Release Series Changes, New Features, and Fixes Caveats The mudflap run time checker has been removed. The mudflap options remain, but do nothing. Support for a number of older systems and recently unmaintained or untested target ports of GCC has been declared obsolete in GCC 4.9. Unless there is activity to revive them, the next release of GCC will have their sources permanently removed.
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GCC 9: Link-time and inter-procedural optimization improvements
GitHub - gergo-/missed-optimizations: Missed optimizations in C compilers
Can't install gcc 4.8, dependency issues
Bug List
GitHub - kennethreitz/osx-gcc-installer: GCC Installer for OSX! Without Xcode!