Tim Northover 20b9f739eb Atomics: make use of the "cmpxchg weak" instruction. ... This also simplifies the IR we create slightly: instead of working out where success & failure should go manually, it turns out we can just always jump to a success/failure block created for the purpose. Later phases will sort out the mess without much difficulty. llvm-svn: 210917		2014-06-13 16:45:52 +00:00
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ARM	Atomics: make use of the "cmpxchg weak" instruction.	2014-06-13 16:45:52 +00:00