[Hexagon] Handle expansion of cmpxchg
llvm-svn: 273432
diff --git a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
index b29a43d..42feffc 100644
--- a/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -1715,6 +1715,9 @@
setMinFunctionAlignment(2);
setStackPointerRegisterToSaveRestore(HRI.getStackRegister());
+ setMaxAtomicSizeInBitsSupported(64);
+ setMinCmpXchgSizeInBits(32);
+
if (EnableHexSDNodeSched)
setSchedulingPreference(Sched::VLIW);
else
@@ -3121,3 +3124,10 @@
// Do not expand loads and stores that don't exceed 64 bits.
return SI->getValueOperand()->getType()->getPrimitiveSizeInBits() > 64;
}
+
+bool HexagonTargetLowering::shouldExpandAtomicCmpXchgInIR(
+ AtomicCmpXchgInst *AI) const {
+ const DataLayout &DL = AI->getModule()->getDataLayout();
+ unsigned Size = DL.getTypeStoreSize(AI->getCompareOperand()->getType());
+ return Size >= 4 && Size <= 8;
+}