Eli Friedman adec587d5c Misc optimizer+codegen work for 'cmpxchg' and 'atomicrmw'. They appear to be ...

working on x86 (at least for trivial testcases); other architectures will
need more work so that they actually emit the appropriate instructions for
orderings stricter than 'monotonic'. (As far as I can tell, the ARM, PPC,
Mips, and Alpha backends need such changes.)

llvm-svn: 136457

2011-07-29 03:05:32 +00:00

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