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PR tree-optimization/85720 * tree-loop-distribution.c (break_alias_scc_partitions): Don't merge SCC if all partitions are builtins. (version_loop_by_alias_check): New parameter. Generate cancelable runtime alias check if all partitions are builtins. (distribute_loop): Update call to above function. gcc/testsuite * gcc.dg/tree-ssa/pr85720.c: New test. * gcc.target/i386/avx256-unaligned-store-2.c: Disable loop pattern distribution. From-SVN: r260753
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