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...ns actually work? At least for functions that take only integers and return integers this could be automated if you compare -O0 output with the optimized outputs. The neon_helper.c testcase is clearly misoptimized by gcc-head here: http://embed.cs.utah.edu/embarrassing/jan_10/harvest/compare_clang-head_gcc-head/compare_23BD1620_disasm.shtml Try calling it like this: int main() { printf("%d\n", helper_neon_rshl_s8(0x12345, 15)); return 0; } Prints 74496 here, and not 0 (gcc-head optimized it to a function returning 0). Best regards, --Edwin

Hi folks, I've posted an updated code size comparison between LLVM, GCC, and others here: http://embed.cs.utah.edu/embarrassing/ New in this version: - much larger collection of harvested functions: more than 360,000 - bug fixes and UI improvements - added the x86 Open64 compiler John