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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-08-26 02:59:24 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-08-26 02:59:24 +0000 |
| commit | 069e2ed794a90cb5108a35627ee148866795f140 (patch) | |
| tree | b335f5ad0d1e7600995ef2848b83090b79121934 /lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | |
| parent | 9bb5488dbd152de41ffcaedccf94bfc43b069bec (diff) | |
Atomic load/store on ARM/Thumb.
I don't really like the patterns, but I'm having trouble coming up with a
better way to handle them.
I plan on making other targets use the same legalization
ARM-without-memory-barriers is using... it's not especially efficient, but
if anyone cares, it's not that hard to fix for a given target if there's
some better lowering.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138621 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp | 6 |
1 files changed, 1 insertions, 5 deletions
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp index 1c28d399cb..0b0b98d834 100644 --- a/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp +++ b/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp @@ -3289,7 +3289,7 @@ static SDValue InsertFenceForAtomic(SDValue Chain, AtomicOrdering Order, const TargetLowering &TLI) { // Fence, if necessary if (Before) { - if (Order == AcquireRelease) + if (Order == AcquireRelease || Order == SequentiallyConsistent) Order = Release; else if (Order == Acquire || Order == Monotonic) return Chain; @@ -3400,10 +3400,6 @@ void SelectionDAGBuilder::visitAtomicLoad(const LoadInst &I) { SDValue InChain = getRoot(); - if (TLI.getInsertFencesForAtomic()) - InChain = InsertFenceForAtomic(InChain, Order, Scope, true, dl, - DAG, TLI); - EVT VT = EVT::getEVT(I.getType()); SDValue L = |