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Commit 61d9149c authored by Robert Lytton's avatar Robert Lytton
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Add XCore support for ATOMIC_FENCE.

ATOMIC_FENCE is lowered to a compiler barrier which is codegen only. There
is no need to emit an instructions since the XCore provides sequential
consistency.

Original patch by Richard Osborne

llvm-svn: 194464
parent ed835b6f
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