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The redundant-store tracking introduced inec5349c37areplaced a safe bitmap_bit_in_range_p check (which bailed on any overlap) with bitmap_all_bits_in_range_p (which only removed fully redundant stores). This broke "last writer wins" semantics for partially overlapping stores: when an earlier store's BFI was applied after the base store's value, it overwrote bytes that should have belonged to the later store. Restore the original overlap check from1d8de1e93e: bail out of the optimization when any bit in a store's byte range is already claimed by a later store in program order. Remove the now-unnecessary redundant-store tracking (redundant_stores, store_ind_to_remove). gcc/ChangeLog: PR rtl-optimization/124476 * avoid-store-forwarding.cc (store_forwarding_analyzer::process_store_forwarding): Replace bitmap_all_bits_in_range_p with bitmap_any_bit_in_range_p and return false on partial overlap. Remove redundant-store vectors and their associated removal, dump, and deletion logic. gcc/testsuite/ChangeLog: PR rtl-optimization/124476 * gcc.dg/pr124476.c: New test.
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