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+2019-09-16 Uroš Bizjak <ubizjak@gmail.com>
+
+ PR target/91719
+ * config/i386/i386.h (TARGET_USE_XCHG_FOR_ATOMIC_STORE): New macro.
+ * config/i386/x86-tune.def (X86_TUNE_USE_XCHG_FOR_ATOMIC_STORE): New.
+ * config/i386/sync.md (atomic_store<mode>): emit XCHG for
+ TARGET_USE_XCHG_FOR_ATOMIC_STORE.
+
2019-09-16 Jason Merrill <jason@redhat.com>
* Makefile.in (build/genmatch.o): Depend on $(CPPLIB_H).