diff options
Diffstat (limited to 'lib/CodeGen/MachineSink.cpp')
| -rw-r--r-- | lib/CodeGen/MachineSink.cpp | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/lib/CodeGen/MachineSink.cpp b/lib/CodeGen/MachineSink.cpp index fda0782853..5969c0b345 100644 --- a/lib/CodeGen/MachineSink.cpp +++ b/lib/CodeGen/MachineSink.cpp @@ -35,10 +35,7 @@ using namespace llvm; static cl::opt<bool> SplitEdges("machine-sink-split", cl::desc("Split critical edges during machine sinking"), - cl::init(false), cl::Hidden); -static cl::opt<unsigned> -SplitLimit("split-limit", - cl::init(~0u), cl::Hidden); + cl::init(true), cl::Hidden); STATISTIC(NumSunk, "Number of machine instructions sunk"); STATISTIC(NumSplit, "Number of critical edges split"); @@ -311,7 +308,7 @@ MachineBasicBlock *MachineSinking::SplitCriticalEdge(MachineInstr *MI, return 0; // Avoid breaking back edge. From == To means backedge for single BB loop. - if (!SplitEdges || NumSplit == SplitLimit || FromBB == ToBB) + if (!SplitEdges || FromBB == ToBB) return 0; // Check for backedges of more "complex" loops. @@ -561,8 +558,6 @@ bool MachineSinking::SinkInstruction(MachineInstr *MI, bool &SawStore) { // BreakPHIEdge is true if all the uses are in the successor MBB being // sunken into and they are all PHI nodes. In this case, machine-sink must // break the critical edge first. - if (NumSplit == SplitLimit) - return false; MachineBasicBlock *NewSucc = SplitCriticalEdge(MI, ParentBlock, SuccToSinkTo, BreakPHIEdge); if (!NewSucc) { |