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Remove code that is now dead from the pattern isel. 

llvm-svn: 23177
This commit is contained in:
Chris Lattner 2005-08-31 19:11:36 +00:00
parent 2f03896a0f
commit 3a04a4b767
1 changed files with 2 additions and 28 deletions
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30
llvm/lib/Target/PowerPC/PPC32ISelPattern.cpp
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@ -803,7 +803,6 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
case ISD::SUB_PARTS:
case ISD::SHL_PARTS:
case ISD::SRL_PARTS:
case ISD::SRA_PARTS:
Result = MakeReg(Node->getValueType(0));
ExprMap[N.getValue(0)] = Result;
for (unsigned i = 1, e = N.Val->getNumValues(); i != e; ++i)
@ -1440,7 +1439,6 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
}
case ISD::SHL_PARTS:
case ISD::SRA_PARTS:
case ISD::SRL_PARTS: {
assert(N.getNumOperands() == 3 && N.getValueType() == MVT::i32 &&
"Not an i64 shift!");
@ -1462,7 +1460,8 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
BuildMI(BB, PPC::SLW, 2, Tmp6).addReg(ShiftOpLo).addReg(Tmp5);
BuildMI(BB, PPC::OR, 2, Result+1).addReg(Tmp4).addReg(Tmp6);
BuildMI(BB, PPC::SLW, 2, Result).addReg(ShiftOpLo).addReg(SHReg);
} else if (ISD::SRL_PARTS == opcode) {
} else {
assert (opcode == ISD::SRL_PARTS);
BuildMI(BB, PPC::SRW, 2, Tmp2).addReg(ShiftOpLo).addReg(SHReg);
BuildMI(BB, PPC::SLW, 2, Tmp3).addReg(ShiftOpHi).addReg(Tmp1);
BuildMI(BB, PPC::OR, 2, Tmp4).addReg(Tmp2).addReg(Tmp3);
@ -1470,31 +1469,6 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) {
BuildMI(BB, PPC::SRW, 2, Tmp6).addReg(ShiftOpHi).addReg(Tmp5);
BuildMI(BB, PPC::OR, 2, Result).addReg(Tmp4).addReg(Tmp6);
BuildMI(BB, PPC::SRW, 2, Result+1).addReg(ShiftOpHi).addReg(SHReg);
} else {
MachineBasicBlock *TmpMBB = new MachineBasicBlock(BB->getBasicBlock());
MachineBasicBlock *PhiMBB = new MachineBasicBlock(BB->getBasicBlock());
MachineBasicBlock *OldMBB = BB;
MachineFunction *F = BB->getParent();
ilist<MachineBasicBlock>::iterator It = BB; ++It;
F->getBasicBlockList().insert(It, TmpMBB);
F->getBasicBlockList().insert(It, PhiMBB);
BB->addSuccessor(TmpMBB);
BB->addSuccessor(PhiMBB);
BuildMI(BB, PPC::SRW, 2, Tmp2).addReg(ShiftOpLo).addReg(SHReg);
BuildMI(BB, PPC::SLW, 2, Tmp3).addReg(ShiftOpHi).addReg(Tmp1);
BuildMI(BB, PPC::OR, 2, Tmp4).addReg(Tmp2).addReg(Tmp3);
BuildMI(BB, PPC::ADDICo, 2, Tmp5).addReg(SHReg).addSImm(-32);
BuildMI(BB, PPC::SRAW, 2, Tmp6).addReg(ShiftOpHi).addReg(Tmp5);
BuildMI(BB, PPC::SRAW, 2, Result+1).addReg(ShiftOpHi).addReg(SHReg);
BuildMI(BB, PPC::BLE, 2).addReg(PPC::CR0).addMBB(PhiMBB);
// Select correct least significant half if the shift amount > 32
BB = TmpMBB;
unsigned Tmp7 = MakeIntReg();
BuildMI(BB, PPC::OR, 2, Tmp7).addReg(Tmp6).addReg(Tmp6);
TmpMBB->addSuccessor(PhiMBB);
BB = PhiMBB;
BuildMI(BB, PPC::PHI, 4, Result).addReg(Tmp4).addMBB(OldMBB)
.addReg(Tmp7).addMBB(TmpMBB);
}
return Result+N.ResNo;
}