[PATCH] D11382: x86 atomic: optimize a.store(reg op a.load(acquire), release)

JF Bastien jfb at chromium.org
Mon Jul 20 22:46:57 PDT 2015

jfb created this revision.
jfb added reviewers: reames, kcc, dvyukov, nadav.
jfb added a subscriber: llvm-commits.

PR24191 finds that the expected memory-register operations aren't generated when relaxed { load ; modify ; store } is used. This is similar to PR17281 which was addressed in D4796, but only for memory-immediate operations (and for memory orderings up to acquire and release).



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