I don't see significant performance changes from the patch (with and without patch enabling ebx) on x86 in 32bits mode.
Thanks, Evgeny On Sat, Oct 11, 2014 at 2:31 AM, Sebastian Pop <seb...@gmail.com> wrote: > Vladimir Makarov wrote: >> I've tested and benchmarked the sub-pass on x86-64 and ARM. The >> sub-pass permits to generate a smaller code in average on both >> architecture (although improvement no-significant), adds < 0.4% >> additional compilation time in -O2 mode of release GCC (according user >> time of compilation of 500K lines fortran program and valgrind lakey # >> insns in combine.i compilation) and about 0.7% in -O0 mode. As the >> performance result, the best I found is 1% SPECFP2000 improvement on >> ARM Ecynos 5410 (973 vs 963) but for Intel Haswell the performance >> results are practically the same (Haswell has a very good >> sophisticated memory sub-system). > > On aarch64 I have seen some minor perf improvements to libpng compress and > decompress. The patch does not change the perf for all other benchmarks that > I > have tested. > > Thanks, > Sebastian
