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Implement InsertBranch() hook
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75966 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -239,9 +239,32 @@ unsigned
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SystemZInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
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MachineBasicBlock *FBB,
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const SmallVectorImpl<MachineOperand> &Cond) const {
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assert(0 && "Implement branches!");
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// FIXME this should probably have a DebugLoc operand
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DebugLoc dl = DebugLoc::getUnknownLoc();
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// Shouldn't be a fall through.
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assert(TBB && "InsertBranch must not be told to insert a fallthrough");
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assert((Cond.size() == 1 || Cond.size() == 0) &&
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"SystemZ branch conditions have one component!");
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return 0;
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if (Cond.empty()) {
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// Unconditional branch?
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assert(!FBB && "Unconditional branch with multiple successors!");
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BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(TBB);
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return 1;
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}
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// Conditional branch.
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unsigned Count = 0;
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SystemZCC::CondCodes CC = (SystemZCC::CondCodes)Cond[0].getImm();
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BuildMI(&MBB, dl, getBrCond(CC)).addMBB(TBB);
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++Count;
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if (FBB) {
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// Two-way Conditional branch. Insert the second branch.
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BuildMI(&MBB, dl, get(SystemZ::JMP)).addMBB(FBB);
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++Count;
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}
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return Count;
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}
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const TargetInstrDesc&
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