diff options
| -rw-r--r-- | lib/Target/ARM/ARMConstantIslandPass.cpp | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp index 8279888dfa..4925a20455 100644 --- a/lib/Target/ARM/ARMConstantIslandPass.cpp +++ b/lib/Target/ARM/ARMConstantIslandPass.cpp @@ -1772,13 +1772,15 @@ AdjustJTTargetBlockForward(MachineBasicBlock *BB, MachineBasicBlock *JTBB) int Size = BBSizes[BBI]; MachineBasicBlock *TBB = 0, *FBB = 0; SmallVector<MachineOperand, 4> Cond; - // If the block is small and ends in an unconditional branch, move it. - if (Size < 50 && Cond.empty()) { - // If the block terminator isn't analyzable, don't try to move the block - if (TII->AnalyzeBranch(*BB, TBB, FBB, Cond)) - return NULL; - MachineFunction::iterator OldPrior = prior(BB); + // If the block terminator isn't analyzable, don't try to move the block + if (TII->AnalyzeBranch(*BB, TBB, FBB, Cond)) + return NULL; + + // If the block is small and ends in an unconditional branch, move it. + if (Size < 50 && Cond.empty() && BB != MF.begin()) { + MachineFunction::iterator BBi = BB; + MachineFunction::iterator OldPrior = prior(BBi); BB->moveAfter(JTBB); OldPrior->updateTerminator(); BB->updateTerminator(); |