[llvm-commits] [llvm] r65375 - /llvm/trunk/lib/CodeGen/StackSlotColoring.cpp

[Owen Anderson]

Author: resistor
Date: Mon Feb 23 23:44:18 2009
New Revision: 65375

URL: http://llvm.org/viewvc/llvm-project?rev=65375&view=rev
Log:
Add a debugging option for SSC DCE.

Modified:
    llvm/trunk/lib/CodeGen/StackSlotColoring.cpp

Modified: llvm/trunk/lib/CodeGen/StackSlotColoring.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/StackSlotColoring.cpp?rev=65375&r1=65374&r2=65375&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/StackSlotColoring.cpp (original)
+++ llvm/trunk/lib/CodeGen/StackSlotColoring.cpp Mon Feb 23 23:44:18 2009
@@ -37,6 +37,8 @@
                cl::init(false), cl::Hidden,
                cl::desc("Enable slot coloring DCE"));
 
+static cl::opt<int> DCELimit("ssc-dce-limit", cl::init(-1), cl::Hidden);
+
 STATISTIC(NumEliminated,   "Number of stack slots eliminated due to coloring");
 STATISTIC(NumDeadAccesses,
                           "Number of trivially dead stack accesses eliminated");
@@ -286,6 +288,9 @@
 
   for (MachineBasicBlock::iterator I = MBB->begin(), E = MBB->end();
        I != E; ++I) {
+    if (DCELimit != -1 && (int)NumDeadAccesses >= DCELimit)
+      break;
+    
     MachineBasicBlock::iterator NextMI = next(I);
     if (NextMI == MBB->end()) continue;