diff options
Diffstat (limited to 'lib/Target/ARM')
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index 74353c1..063f1d4 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -2600,7 +2600,10 @@ static SDValue LowerATOMIC_FENCE(SDValue Op, SelectionDAG &DAG, ConstantSDNode *OrdN = cast<ConstantSDNode>(Op.getOperand(1)); AtomicOrdering Ord = static_cast<AtomicOrdering>(OrdN->getZExtValue()); unsigned Domain = ARM_MB::ISH; - if (Subtarget->isSwift() && Ord == Release) { + if (Subtarget->isMClass()) { + // Only a full system barrier exists in the M-class architectures. + Domain = ARM_MB::SY; + } else if (Subtarget->isSwift() && Ord == Release) { // Swift happens to implement ISHST barriers in a way that's compatible with // Release semantics but weaker than ISH so we'd be fools not to use // it. Beware: other processors probably don't! |