ea1ff9e46c
prune_runtime_alias_test_list used ordered_remove to remove a merged alias pair, which made the function quadratic when many aliases could be removed. I had a testcase in which these memmoves accounted for an impressive 85% of compile time. The fact that we had so many probably shows a deeper problem, but still, it's easy to remove as we go. 2019-12-06 Richard Sandiford <richard.sandiford@arm.com> gcc/ * tree-data-ref.c (prune_runtime_alias_test_list): Exit early for empty vectors. Avoid using ordered_remove and instead shuffle the vector as we go. From-SVN: r279038
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