6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-03-03 14:31:10 +00:00
Code Issues Projects Releases Wiki Activity

Move MRI liveouts to Sparc return instructions.

Browse Source 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174413 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2013-02-05 18:16:58 +00:00
parent 691c365aad
commit 067e5a2a1a
2 changed files with 13 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
lib/Target/Sparc/SparcISelLowering.cpp
View File

@ -95,15 +95,10 @@ SparcTargetLowering::LowerReturn(SDValue Chain,
// Analize return values.
CCInfo.AnalyzeReturn(Outs, RetCC_Sparc32);
// If this is the first return lowered for this function, add the regs to the
// liveout set for the function.
if (MF.getRegInfo().liveout_empty()) {
for (unsigned i = 0; i != RVLocs.size(); ++i)
if (RVLocs[i].isRegLoc())
MF.getRegInfo().addLiveOut(RVLocs[i].getLocReg());
}
SDValue Flag;
SmallVector<SDValue, 4> RetOps(1, Chain);
// Make room for the return address offset.
RetOps.push_back(SDValue());
// Copy the result values into the output registers.
for (unsigned i = 0; i != RVLocs.size(); ++i) {
@ -115,6 +110,7 @@ SparcTargetLowering::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()));
}
unsigned RetAddrOffset = 8; //Call Inst + Delay Slot
@ -127,18 +123,19 @@ SparcTargetLowering::LowerReturn(SDValue Chain,
SDValue Val = DAG.getCopyFromReg(Chain, dl, Reg, getPointerTy());
Chain = DAG.getCopyToReg(Chain, dl, SP::I0, Val, Flag);
Flag = Chain.getValue(1);
if (MF.getRegInfo().liveout_empty())
MF.getRegInfo().addLiveOut(SP::I0);
RetOps.push_back(DAG.getRegister(SP::I0, getPointerTy()));
RetAddrOffset = 12; // CallInst + Delay Slot + Unimp
}
SDValue RetAddrOffsetNode = DAG.getConstant(RetAddrOffset, MVT::i32);
RetOps[0] = Chain; // Update chain.
RetOps[1] = DAG.getConstant(RetAddrOffset, MVT::i32);
// Add the flag if we have it.
if (Flag.getNode())
return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain,
RetAddrOffsetNode, Flag);
return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other, Chain,
RetAddrOffsetNode);
RetOps.push_back(Flag);
return DAG.getNode(SPISD::RET_FLAG, dl, MVT::Other,
&RetOps[0], RetOps.size());
}
/// LowerFormalArguments - V8 uses a very simple ABI, where all values are

2
lib/Target/Sparc/SparcInstrInfo.td
View File

@ -126,7 +126,7 @@ def call : SDNode<"SPISD::CALL", SDT_SPCall,
def SDT_SPRet : SDTypeProfile<0, 1, [SDTCisVT<0, i32>]>;
def retflag : SDNode<"SPISD::RET_FLAG", SDT_SPRet,
[SDNPHasChain, SDNPOptInGlue]>;
[SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
def flushw : SDNode<"SPISD::FLUSHW", SDTNone,
[SDNPHasChain, SDNPSideEffect, SDNPMayStore]>;