llvm.memory.barrier, and impl for x86 and alpha
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47204 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetSelectionDAG.td b/lib/Target/TargetSelectionDAG.td
index 21bdb5c..eeed994 100644
--- a/lib/Target/TargetSelectionDAG.td
+++ b/lib/Target/TargetSelectionDAG.td
@@ -185,6 +185,11 @@
SDTCisEltOfVec<2, 1>, SDTCisSameAs<0, 1>, SDTCisPtrTy<3>
]>;
+def STDMemBarrier : SDTypeProfile<0, 5, [
+ SDTCisSameAs<0,1>, SDTCisSameAs<0,2>, SDTCisSameAs<0,3>, SDTCisSameAs<0,4>,
+ SDTCisInt<0>
+]>;
+
class SDCallSeqStart<list<SDTypeConstraint> constraints> :
SDTypeProfile<0, 1, constraints>;
class SDCallSeqEnd<list<SDTypeConstraint> constraints> :
@@ -329,6 +334,8 @@
def ret : SDNode<"ISD::RET" , SDTNone, [SDNPHasChain]>;
def trap : SDNode<"ISD::TRAP" , SDTNone,
[SDNPHasChain, SDNPSideEffect]>;
+def membarrier : SDNode<"ISD::MEMBARRIER" , STDMemBarrier,
+ [SDNPHasChain, SDNPSideEffect]>;
// Do not use ld, st directly. Use load, extload, sextload, zextload, store,
// and truncst (see below).