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Back out the previous change to SelectBranchCC, since there are cases it

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could miscompile.  A correct solution will be found in the near future.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21095 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nate Begeman 2005-04-05 04:32:16 +00:00
parent 439b444cad
commit c8c5c8f0fa
1 changed files with 11 additions and 4 deletions
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15
lib/Target/PowerPC/PPCISelPattern.cpp
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@ -667,13 +667,20 @@ void ISel::SelectBranchCC(SDOperand N)
// Get the MBB we will fall through to so that we can hand it off to the
// branch selection pass as an argument to the PPC::COND_BRANCH pseudo op.
ilist<MachineBasicBlock>::iterator It = BB;
MachineBasicBlock *Fallthrough = ++It;
//ilist<MachineBasicBlock>::iterator It = BB;
//MachineBasicBlock *Fallthrough = ++It;
Select(N.getOperand(0)); //chain
unsigned Opc = SelectSetCR0(N.getOperand(1));
BuildMI(BB, PPC::COND_BRANCH, 4).addReg(PPC::CR0).addImm(Opc)
.addMBB(Dest).addMBB(Fallthrough);
// FIXME: Use this once we have something approximating two-way branches
// We cannot currently use this in case the ISel hands us something like
// BRcc MBBx
// BR MBBy
// since the fallthrough basic block for the conditional branch does not start
// with the unconditional branch (it is skipped over).
//BuildMI(BB, PPC::COND_BRANCH, 4).addReg(PPC::CR0).addImm(Opc)
// .addMBB(Dest).addMBB(Fallthrough);
BuildMI(BB, Opc, 2).addReg(PPC::CR0).addMBB(Dest);
return;
}