forked from OSchip/llvm-project
3b3c9c3e44
On X86 (and similar OOO cores) unrolling is very limited, and even if the runtime unrolling is otherwise profitable, the expense of a division to compute the trip count could greatly outweigh the benefits. On the A2, we unroll a lot, and the benefits of unrolling are more significant (seeing a 5x or 6x speedup is not uncommon), so we're more able to tolerate the expense, on average, of a division to compute the trip count. llvm-svn: 237947 |
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a2-high-cost-trip-count-computation.ll | ||
a2-unrolling.ll | ||
lit.local.cfg | ||
p7-unrolling.ll |