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While bootstrapping GCC on S/390 with --enable-checking=release several warnings about use of uninitialized variables bitpos, bitregion_start, and bitregion_end of function pass_store_merging::process_store are raised. According to PR94952 these seem to be false positives which are silenced by initialising the mentioned variables. Bootstrapped on S/390. Ok for master and releases/gcc-10 assuming that regtest succeeds (still running but I don't see a reason why it should fail)? gcc/ChangeLog: 2020-05-18 Stefan Schulze Frielinghaus <stefansf@linux.ibm.com> PR tree-optimization/94952 * gimple-ssa-store-merging.c (pass_store_merging::process_store): Initialize variables bitpos, bitregion_start, and bitregion_end in order to silence warnings about use of uninitialized variables.
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