diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineBlockPlacement.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineBlockPlacement.cpp | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineBlockPlacement.cpp b/llvm/lib/CodeGen/MachineBlockPlacement.cpp index cb352a5..6179e09 100644 --- a/llvm/lib/CodeGen/MachineBlockPlacement.cpp +++ b/llvm/lib/CodeGen/MachineBlockPlacement.cpp @@ -213,6 +213,12 @@ static cl::opt<bool> RenumberBlocksBeforeView( "into a dot graph. Only used when a function is being printed."), cl::init(false), cl::Hidden); +static cl::opt<unsigned> ExtTspBlockPlacementMaxBlocks( + "ext-tsp-block-placement-max-blocks", + cl::desc("Maximum number of basic blocks in a function to run ext-TSP " + "block placement."), + cl::init(UINT_MAX), cl::Hidden); + namespace llvm { extern cl::opt<bool> EnableExtTspBlockPlacement; extern cl::opt<bool> ApplyExtTspWithoutProfile; @@ -3523,7 +3529,8 @@ bool MachineBlockPlacement::runOnMachineFunction(MachineFunction &MF) { // Apply a post-processing optimizing block placement. if (MF.size() >= 3 && EnableExtTspBlockPlacement && - (ApplyExtTspWithoutProfile || MF.getFunction().hasProfileData())) { + (ApplyExtTspWithoutProfile || MF.getFunction().hasProfileData()) && + MF.size() <= ExtTspBlockPlacementMaxBlocks) { // Find a new placement and modify the layout of the blocks in the function. applyExtTsp(); |