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Implement InsertBranch() hook

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75966 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Anton Korobeynikov 2009-07-16 14:00:10 +00:00
parent c9d4a887f6
commit 64d52d4a5d
1 changed files with 25 additions and 2 deletions
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27
lib/Target/SystemZ/SystemZInstrInfo.cpp
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@ -239,9 +239,32 @@ unsigned
SystemZInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond) const {
assert(0 && "Implement branches!");
// FIXME this should probably have a DebugLoc operand
DebugLoc dl = DebugLoc::getUnknownLoc();
// Shouldn't be a fall through.
assert(TBB && "InsertBranch must not be told to insert a fallthrough");
assert((Cond.size() == 1 || Cond.size() == 0) &&
"SystemZ branch conditions have one component!");
return 0;
if (Cond.empty()) {
// Unconditional branch?
assert(!FBB && "Unconditional branch with multiple successors!");
BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(TBB);
return 1;
}
// Conditional branch.
unsigned Count = 0;
SystemZCC::CondCodes CC = (SystemZCC::CondCodes)Cond[0].getImm();
BuildMI(&MBB, dl, getBrCond(CC)).addMBB(TBB);
++Count;
if (FBB) {
// Two-way Conditional branch. Insert the second branch.
BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(FBB);
++Count;
}
return Count;
}
const TargetInstrDesc&