commit d205f7a940dd38480ff6283328c7d429201cdf27
author Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Sep 15 18:22:52 2011 +0000
committer Jakob Stoklund Olesen <stoklund@2pi.dk> Thu Sep 15 18:22:52 2011 +0000
tree eb4e73ea98564d523f8c2fae5ea01f2b771f0fc2
parent 1b69a128d6b98456c666b4031cc46c3d0fbe6177

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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139815 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/InlineSpiller.cpp

diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp
index 5078f3a..169a867 100644
--- a/lib/CodeGen/InlineSpiller.cpp
+++ b/lib/CodeGen/InlineSpiller.cpp
@@ -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;
 }