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3 Commits

Author SHA1 Message Date
Robin Morisset 163ef0402a Relax the constraint more in MemoryDependencyAnalysis.cpp 
Even loads/stores that have a stronger ordering than monotonic can be safe.
The rule is no release-acquire pair on the path from the QueryInst, assuming that
the QueryInst is not atomic itself.

llvm-svn: 216771
 2014-08-29 20:32:58 +00:00
Robin Morisset 4ffe8aaa69 Weak relaxing of the constraints on atomics in MemoryDependencyAnalysis 
Monotonic accesses do not have to kill the analysis, as long as the QueryInstr is not
itself atomic.

llvm-svn: 215942
 2014-08-18 22:18:11 +00:00
Eli Friedman 9a468153e1 Atomic load/store handling for the passes using memdep (GVN, DSE, memcpyopt). 
llvm-svn: 137888
 2011-08-17 22:22:24 +00:00