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Fix a bunch of custom-inserter functions to handle the case where

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the pseudo instruction is not at the end of the block.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107655 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-07-06 15:18:19 +00:00
parent 7d26218ebe
commit b81c771c0d
14 changed files with 274 additions and 209 deletions
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27
lib/Target/Sparc/SparcISelLowering.cpp
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@@ -1007,21 +1007,20 @@ SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
MachineFunction *F = BB->getParent();
MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *sinkMBB = F->CreateMachineBasicBlock(LLVM_BB);
// Transfer the remainder of BB and its successor edges to sinkMBB.
sinkMBB->splice(sinkMBB->begin(), BB,
llvm::next(MachineBasicBlock::iterator(MI)),
BB->end());
sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
// Add the true and fallthrough blocks as its successors.
BB->addSuccessor(copy0MBB);
BB->addSuccessor(sinkMBB);
BuildMI(BB, dl, TII.get(BROpcode)).addMBB(sinkMBB).addImm(CC);
F->insert(It, copy0MBB);
F->insert(It, sinkMBB);
// Update machine-CFG edges by first adding all successors of the current
// block to the new block which will contain the Phi node for the select.
for (MachineBasicBlock::succ_iterator I = BB->succ_begin(),
E = BB->succ_end(); I != E; ++I)
sinkMBB->addSuccessor(*I);
// Next, remove all successors of the current block, and add the true
// and fallthrough blocks as its successors.
while (!BB->succ_empty())
BB->removeSuccessor(BB->succ_begin());
// Next, add the true and fallthrough blocks as its successors.
BB->addSuccessor(copy0MBB);
BB->addSuccessor(sinkMBB);
// copy0MBB:
// %FalseValue = ...
@@ -1035,11 +1034,11 @@ SparcTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
// ...
BB = sinkMBB;
BuildMI(BB, dl, TII.get(SP::PHI), MI->getOperand(0).getReg())
BuildMI(*BB, BB->begin(), dl, TII.get(SP::PHI), MI->getOperand(0).getReg())
.addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
.addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
MI->eraseFromParent(); // The pseudo instruction is gone now.
return BB;
}