InlineSpiller: Store bucket pointers instead of iterators.

Lets us use a SetVector instead of an explicit set + vector combination.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182586 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp
index 35295fe..3bdc30d 100644 (file)
--- a/lib/CodeGen/InlineSpiller.cpp
+++ b/lib/CodeGen/InlineSpiller.cpp
@@ -14,6 +14,7 @@
 
 #define DEBUG_TYPE "regalloc"
 #include "Spiller.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/Statistic.h"
 #include "llvm/ADT/TinyPtrVector.h"
 #include "llvm/Analysis/AliasAnalysis.h"
@@ -337,10 +338,12 @@ static raw_ostream &operator<<(raw_ostream &OS,
 /// propagateSiblingValue - Propagate the value in SVI to dependents if it is
 /// known.  Otherwise remember the dependency for later.
 ///
-/// @param SVI SibValues entry to propagate.
+/// @param SVIIter SibValues entry to propagate.
 /// @param VNI Dependent value, or NULL to propagate to all saved dependents.
-void InlineSpiller::propagateSiblingValue(SibValueMap::iterator SVI,
+void InlineSpiller::propagateSiblingValue(SibValueMap::iterator SVIIter,
                                           VNInfo *VNI) {
+  SibValueMap::value_type *SVI = &*SVIIter;
+
   // When VNI is non-NULL, add it to SVI's deps, and only propagate to that.
   TinyPtrVector<VNInfo*> FirstDeps;
   if (VNI) {
@@ -352,14 +355,12 @@ void InlineSpiller::propagateSiblingValue(SibValueMap::iterator SVI,
   if (!SVI->second.hasDef())
     return;
 
-  // Work list of values to propagate.  It would be nice to use a SetVector
-  // here, but then we would be forced to use a SmallSet.
-  SmallVector<SibValueMap::iterator, 8> WorkList(1, SVI);
-  SmallPtrSet<VNInfo*, 8> WorkSet;
+  // Work list of values to propagate.
+  SmallSetVector<SibValueMap::value_type *, 8> WorkList;
+  WorkList.insert(SVI);
 
   do {
     SVI = WorkList.pop_back_val();
-    WorkSet.erase(SVI->first);
     TinyPtrVector<VNInfo*> *Deps = VNI ? &FirstDeps : &SVI->second.Deps;
     VNI = 0;
 
@@ -450,8 +451,7 @@ void InlineSpiller::propagateSiblingValue(SibValueMap::iterator SVI,
         continue;
 
       // Something changed in DepSVI. Propagate to dependents.
-      if (WorkSet.insert(DepSVI->first))
-        WorkList.push_back(DepSVI);
+      WorkList.insert(&*DepSVI);
 
       DEBUG(dbgs() << "  update " << DepSVI->first->id << '@'
             << DepSVI->first->def << " to:\t" << DepSV);