[llvm-commits] [llvm] r54958 - /llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp

[Owen Anderson]

Author: resistor
Date: Mon Aug 18 19:17:30 2008
New Revision: 54958

URL: http://llvm.org/viewvc/llvm-project?rev=54958&view=rev
Log:
Add a flag to enable the fast spilling path.

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

Modified: llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp?rev=54958&r1=54957&r2=54958&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp (original)
+++ llvm/trunk/lib/CodeGen/LiveIntervalAnalysis.cpp Mon Aug 18 19:17:30 2008
@@ -49,6 +49,9 @@
 
 static cl::opt<bool> EnableAggressiveRemat("aggressive-remat", cl::Hidden);
 
+static cl::opt<bool> EnableFastSpilling("fast-spill",
+                                        cl::init(false), cl::Hidden);
+
 STATISTIC(numIntervals, "Number of original intervals");
 STATISTIC(numIntervalsAfter, "Number of intervals after coalescing");
 STATISTIC(numFolds    , "Number of loads/stores folded into instructions");
@@ -1698,6 +1701,10 @@
 addIntervalsForSpills(const LiveInterval &li,
                       const MachineLoopInfo *loopInfo, VirtRegMap &vrm,
                       float &SSWeight) {
+  
+  if (EnableFastSpilling)
+    return addIntervalsForSpillsFast(li, loopInfo, vrm, SSWeight);
+  
   assert(li.weight != HUGE_VALF &&
          "attempt to spill already spilled interval!");