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Summary: 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). This patch also handles some floating-point operations.
Reviewers: reames, kcc, dvyukov, nadav, morisset, chandlerc, t.p.northover, pete
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11382
llvm-svn: 244128