[llvm-commits] [llvm] r139815 - /llvm/trunk/lib/CodeGen/InlineSpiller.cpp

[Jakob Stoklund Olesen]

Author: stoklund
Date: Thu Sep 15 13:22:52 2011
New Revision: 139815

URL: http://llvm.org/viewvc/llvm-project?rev=139815&view=rev
Log:
Count correctly when a COPY turns into a spill or reload.

The number of spills could go negative since a folded COPY is just a
spill, and it may be eliminated.

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

Modified: llvm/trunk/lib/CodeGen/InlineSpiller.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/InlineSpiller.cpp?rev=139815&r1=139814&r2=139815&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/InlineSpiller.cpp (original)
+++ llvm/trunk/lib/CodeGen/InlineSpiller.cpp Thu Sep 15 13:22:52 2011
@@ -1002,6 +1002,7 @@
 bool InlineSpiller::foldMemoryOperand(MachineBasicBlock::iterator MI,
                                       const SmallVectorImpl<unsigned> &Ops,
                                       MachineInstr *LoadMI) {
+  bool WasCopy = MI->isCopy();
   // TargetInstrInfo::foldMemoryOperand only expects explicit, non-tied
   // operands.
   SmallVector<unsigned, 8> FoldOps;
@@ -1031,7 +1032,12 @@
     VRM.addSpillSlotUse(StackSlot, FoldMI);
   MI->eraseFromParent();
   DEBUG(dbgs() << "\tfolded: " << *FoldMI);
-  ++NumFolded;
+  if (!WasCopy)
+    ++NumFolded;
+  else if (Ops.front() == 0)
+    ++NumSpills;
+  else
+    ++NumReloads;
   return true;
 }