Code generation for 'fence' instruction.
llvm-svn: 136283
diff --git a/llvm/lib/Target/Mips/MipsISelLowering.cpp b/llvm/lib/Target/Mips/MipsISelLowering.cpp
index 106d923..0dac789 100644
--- a/llvm/lib/Target/Mips/MipsISelLowering.cpp
+++ b/llvm/lib/Target/Mips/MipsISelLowering.cpp
@@ -160,7 +160,9 @@
// Use the default for now
setOperationAction(ISD::STACKSAVE, MVT::Other, Expand);
setOperationAction(ISD::STACKRESTORE, MVT::Other, Expand);
+
setOperationAction(ISD::MEMBARRIER, MVT::Other, Custom);
+ setOperationAction(ISD::ATOMIC_FENCE, MVT::Other, Custom);
if (Subtarget->isSingleFloat())
setOperationAction(ISD::SELECT_CC, MVT::f64, Expand);
@@ -529,6 +531,7 @@
case ISD::FCOPYSIGN: return LowerFCOPYSIGN(Op, DAG);
case ISD::FRAMEADDR: return LowerFRAMEADDR(Op, DAG);
case ISD::MEMBARRIER: return LowerMEMBARRIER(Op, DAG);
+ case ISD::ATOMIC_FENCE: return LowerATOMIC_FENCE(Op, DAG);
}
return SDValue();
}
@@ -1536,6 +1539,16 @@
DAG.getConstant(SType, MVT::i32));
}
+SDValue MipsTargetLowering::LowerATOMIC_FENCE(SDValue Op,
+ SelectionDAG& DAG) const {
+ // FIXME: Need pseudo-fence for 'singlethread' fences
+ // FIXME: Set SType for weaker fences where supported/appropriate.
+ unsigned SType = 0;
+ DebugLoc dl = Op.getDebugLoc();
+ return DAG.getNode(MipsISD::Sync, dl, MVT::Other, Op.getOperand(0),
+ DAG.getConstant(SType, MVT::i32));
+}
+
//===----------------------------------------------------------------------===//
// Calling Convention Implementation
//===----------------------------------------------------------------------===//