diff options
| -rw-r--r-- | llvm/lib/CodeGen/MachineBlockPlacement.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineBlockPlacement.cpp b/llvm/lib/CodeGen/MachineBlockPlacement.cpp index d849509ce12..ad73449f972 100644 --- a/llvm/lib/CodeGen/MachineBlockPlacement.cpp +++ b/llvm/lib/CodeGen/MachineBlockPlacement.cpp @@ -99,6 +99,11 @@ static cl::opt<bool> cl::desc("Model the cost of loop rotation more " "precisely by using profile data."), cl::init(false), cl::Hidden); +static cl::opt<bool> + ForcePreciseRotationCost("force-precise-rotation-cost", + cl::desc("Model the cost of loop rotation more " + "precisely by using profile data."), + cl::init(false), cl::Hidden); static cl::opt<unsigned> MisfetchCost( "misfetch-cost", @@ -1126,7 +1131,8 @@ void MachineBlockPlacement::buildLoopChains(MachineFunction &F, // this loop by modeling costs more precisely which requires the profile data // for better layout. bool RotateLoopWithProfile = - PreciseRotationCost && F.getFunction()->getEntryCount(); + ForcePreciseRotationCost || + (PreciseRotationCost && F.getFunction()->getEntryCount()); // First check to see if there is an obviously preferable top block for the // loop. This will default to the header, but may end up as one of the |
