Move MRI liveouts to Hexagon return instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174407 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Hexagon/HexagonISelLowering.cpp b/lib/Target/Hexagon/HexagonISelLowering.cpp
index 9c7243bdcebf07a2c0e7a75504dcf4b717c043d5..857b15f9a944af0b20a859017c7ef77ab4ee0156 100644 (file)
--- a/lib/Target/Hexagon/HexagonISelLowering.cpp
+++ b/lib/Target/Hexagon/HexagonISelLowering.cpp
@@ -304,15 +304,9 @@ HexagonTargetLowering::LowerReturn(SDValue Chain,
   // Analyze return values of ISD::RET
   CCInfo.AnalyzeReturn(Outs, RetCC_Hexagon);
 
-  // If this is the first return lowered for this function, add the regs to the
-  // liveout set for the function.
-  if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
-    for (unsigned i = 0; i != RVLocs.size(); ++i)
-      if (RVLocs[i].isRegLoc())
-        DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
-  }
-
   SDValue Flag;
+  SmallVector<SDValue, 4> RetOps(1, Chain);
+
   // Copy the result values into the output registers.
   for (unsigned i = 0; i != RVLocs.size(); ++i) {
     CCValAssign &VA = RVLocs[i];
@@ -321,12 +315,17 @@ HexagonTargetLowering::LowerReturn(SDValue Chain,
 
     // Guarantee that all emitted copies are stuck together with flags.
     Flag = Chain.getValue(1);
+    RetOps.push_back(DAG.getRegister(VA.getLocReg(), VA.getLocVT()));
   }
 
+  RetOps[0] = Chain;  // Update chain.
+
+  // Add the flag if we have it.
   if (Flag.getNode())
-    return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
+    RetOps.push_back(Flag);
 
-  return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain);
+  return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other,
+                     &RetOps[0], RetOps.size());
 }
 
 

diff --git a/lib/Target/Hexagon/HexagonInstrInfo.td b/lib/Target/Hexagon/HexagonInstrInfo.td
index 6caab2680c022efcb70f05d8ef693a4402d1d331..ac2dd22e21fee01f0d82e55483d7e709ba77364a 100644 (file)
--- a/lib/Target/Hexagon/HexagonInstrInfo.td
+++ b/lib/Target/Hexagon/HexagonInstrInfo.td
@@ -808,7 +808,7 @@ let isBranch = 1, isTerminator=1, neverHasSideEffects = 1, Defs = [PC],
 // JR +
 //===----------------------------------------------------------------------===//
 def retflag : SDNode<"HexagonISD::RET_FLAG", SDTNone,
-                               [SDNPHasChain, SDNPOptInGlue]>;
+                               [SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
 
 // Jump to address from register.
 let isPredicable =1, isReturn = 1, isTerminator = 1, isBarrier = 1,