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6a19dea7f6
LLVM's Polly (ISL to be precise) is unhappy with the loop from ddt_stat_add(): CC [M] fs/zfs/zfs/ddt.o ../lib/External/isl/isl_schedule_node.c:2470: cannot insert node between set or sequence node and its filter children (building with the custom patch which adds Polly support to Kbuild) The mentioned loop is rather suboptimal. All that we need is to just treat ddt_stat_t as an array of u64 and perform 1:1 addition or substraction. This can be done in simpler for-loop with the determined index and bounds. Compiler will expand d_end - d into a number of ddt_stat_t fields at compile time. This prevents Polly from failing on this file. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Alexander Lobakin <alobakin@pm.me> Closes #12253 |
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