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Revert r107655.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107668 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman
2010-07-06 15:49:48 +00:00
parent e9e1215d94
commit 258c58cc62
14 changed files with 215 additions and 280 deletions
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12
lib/Target/SystemZ/SystemZISelLowering.cpp
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@@ -827,20 +827,16 @@ SystemZTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
MachineBasicBlock *copy1MBB = F->CreateMachineBasicBlock(LLVM_BB);
SystemZCC::CondCodes CC = (SystemZCC::CondCodes)MI->getOperand(3).getImm();
BuildMI(BB, dl, TII.getBrCond(CC)).addMBB(copy1MBB);
F->insert(I, copy0MBB);
F->insert(I, copy1MBB);
// Update machine-CFG edges by transferring all successors of the current
// block to the new block which will contain the Phi node for the select.
copy1MBB->splice(copy1MBB->begin(), BB,
llvm::next(MachineBasicBlock::iterator(MI)),
BB->end());
copy1MBB->transferSuccessorsAndUpdatePHIs(BB);
copy1MBB->transferSuccessors(BB);
// Next, add the true and fallthrough blocks as its successors.
BB->addSuccessor(copy0MBB);
BB->addSuccessor(copy1MBB);
BuildMI(BB, dl, TII.getBrCond(CC)).addMBB(copy1MBB);
// copy0MBB:
// %FalseValue = ...
// # fallthrough to copy1MBB
@@ -853,11 +849,11 @@ SystemZTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
// %Result = phi [ %FalseValue, copy0MBB ], [ %TrueValue, thisMBB ]
// ...
BB = copy1MBB;
BuildMI(*BB, BB->begin(), dl, TII.get(SystemZ::PHI),
BuildMI(BB, dl, TII.get(SystemZ::PHI),
MI->getOperand(0).getReg())
.addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB)
.addReg(MI->getOperand(1).getReg()).addMBB(thisMBB);
MI->eraseFromParent(); // The pseudo instruction is gone now.
F->DeleteMachineInstr(MI); // The pseudo instruction is gone now.
return BB;
}