0f0027d163
As Alexander pointed out in the thread starting at [1] the sort_by_bitpos sorting function was behaving badly when we had multiple stores at the same position. He fixed that (thanks!) but we can do better by not returning zero when the bitpositions are equal but by falling back to comparing the order the stores appear in, which is guaranteed to be unique (barring other bugs elsewhere). This patch does that. Bootstrapped and tested on aarch64-none-linux-gnu. [1] https://gcc.gnu.org/ml/gcc-patches/2017-07/msg00895.html * gimple-ssa-store-merging.c (sort_by_bitpos): Compare store order when bitposition is the same. From-SVN: r252084 |
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