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Move MRI liveouts to Hexagon return instructions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174407 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-02-05 18:08:43 +00:00
parent fc74327444
commit 87b87ad8fb
2 changed files with 11 additions and 12 deletions
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21
lib/Target/Hexagon/HexagonISelLowering.cpp
View File

@ -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()));
}
if (Flag.getNode())
return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
RetOps[0] = Chain; // Update chain.
return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other, Chain);
// Add the flag if we have it.
if (Flag.getNode())
RetOps.push_back(Flag);
return DAG.getNode(HexagonISD::RET_FLAG, dl, MVT::Other,
&RetOps[0], RetOps.size());
}

2
lib/Target/Hexagon/HexagonInstrInfo.td
View File

@ -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,