On 1/18/17 12:04 PM, Andrew Cooper wrote: > Last time I tried LTO: > > * The GCC build did work, but the net binary was bigger rather than > smaller, and it successfully boot > * The Clang build worked, made a much smaller binary, but due to a clang > bug, "optimised" code into using SSE, and blew up spectacularly when > booting. > > From experiments with XTF, Clang 3.9 LTO is far more comprehensive, and > is basically capable of optimising entire XTF tests into one single test > function, and properly respects the "no FPU ever" options used during boot. > > ~Andrew
FWIW, some of the clang issues I reported against LTO and FPU bits are marked as fixed in 3.9 and 4.0. Not sure if things got backported. -- Doug Goldstein
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