diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/FastISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 5de66670b2..0c1ac6982d 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -821,8 +821,11 @@ FastISel::SelectInstruction(const Instruction *I) { /// the CFG. void FastISel::FastEmitBranch(MachineBasicBlock *MSucc, DebugLoc DL) { - if (FuncInfo.MBB->isLayoutSuccessor(MSucc)) { - // The unconditional fall-through case, which needs no instructions. + + if (FuncInfo.MBB->getBasicBlock()->size() > 1 && FuncInfo.MBB->isLayoutSuccessor(MSucc)) { + // For more accurate line information if this is the only instruction + // in the block then emit it, otherwise we have the unconditional + // fall-through case, which needs no instructions. } else { // The unconditional branch case. TII.InsertBranch(*FuncInfo.MBB, MSucc, NULL, |