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Show HN: See What Your C Function Compiles To
- J_Darnley 11y ago> Compiler: x86 gcc 4.9.2 > Compiler options: -march=i686 > error: CPU you selected does not support x86-64 instruction set Strange, I'm sure x86 is not x86_64
- Samathy 11y agoThe output provided when looking at the given example squaring function without and then with the compiler option -O (GCC 5.1.0 or Clang 3.6) is rather interesting. The code goes from something rather crazy looking, to something that a human would write. Its surprising that these compilers arnt clever enough already to produce the optimized output by default.