Richard Diamond 972533b0a1 Fix an alignment error in llvm::expandAtomicRMWToCmpXchg without breaking the build where X86 isn't enabled.
Summary: Divide the primitive size in bits by eight so the initial load's alignment is in bytes as expected. Tested with the included unit test.

Reviewers: rengolin, jfb

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D11804

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244229 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-06 16:55:03 +00:00
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