Lines Matching defs:IBB

1037   // Look at blocks (IBB) with multiple predecessors (PBB).
1040   // to IBB, and
1042   // not IBB; this may require adding back an unconditional branch to IBB
1044   //   Bcc IBB
1048   // with a conceptual B to IBB after that, which never actually exists.
1060     MachineBasicBlock *IBB = &*I;
1065     // Bail if merging after placement and IBB is the loop header because
1066     // -- If merging predecessors that belong to the same loop as IBB, the
1071     // --If merging predecessors that do not belong to the same loop as IBB, the
1072     // loop info of IBB's loop and the other loops may be affected. Calling the
1076       ML = MLI->getLoopFor(IBB);
1077       if (ML && IBB == ML->getHeader())
1089       if (PBB == IBB)
1102       // same loop as IBB.  The reason is the same as above when skipping loop
1111         // Failing case: IBB is the target of a cbr, and we cannot reverse the
1114         if (!Cond.empty() && TBB == IBB) {
1131             TII->insertBranch(*PBB, (TBB == IBB) ? FBB : TBB, nullptr,
1147       MadeChange |= TryTailMergeBlocks(IBB, PredBB, MinCommonTailLength);
1154       FixTail(MergePotentials.begin()->getBlock(), IBB, TII,