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Re: [ARM]Extra load store/instructions compared to gcc-3.4
This is a case when ivopts pass makes too many induction variables, exceeding
the number of available registers. If you want to debug it, see
ivopts_global_cost_for_size in tree-ssa-loop-ivopts.c and its callers;
perhaps, the issue is that it fails to account for IVs created in inner loops
when processing outer loops.
In any case, I recommend to create a bug report in the GCC bugzilla for this
Hope that helps,