Added unittests for IntegersSubset and IntegersSubsetMapping.

- Fixed IntegersSubsetGeneric copy/assignment behaviour. 
- Fixed IntegersSubsetGeneric::getSize/getSingleValue methods.
- Fixed IntegersSubsetGeneric::verify method.

Also IntegersSubset.h and IntegersSubsetMapping.h headers was fixed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157887 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Support/IntegersSubset.h

@@ -1,4 +1,4 @@
-//===-- llvm/ConstantRangesSet.h - The constant set of ranges ---*- C++ -*-===//
+//===-- llvm/IntegersSubset.h - The subset of integers ----------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -9,10 +9,9 @@
 //
 /// @file
 /// This file contains class that implements constant set of ranges:
-/// [<Low0,High0>,...,<LowN,HighN>]. Mainly, this set is used by SwitchInst and
-/// represents case value that may contain multiple ranges for a single
-/// successor.
-///
+/// [<Low0,High0>,...,<LowN,HighN>]. Initially, this class was created for
+/// SwitchInst and was used for case value representation that may contain
+/// multiple ranges for a single successor.
 //
 //===----------------------------------------------------------------------===//
 
@@ -280,7 +279,9 @@ public:
   typedef std::list<IntTy> FlatCollectionTy;
   typedef std::pair<IntTy*, IntTy*> RangeLinkTy;
   typedef SmallVector<RangeLinkTy, 64> RangeLinksTy;
-  typedef typename RangeLinksTy::iterator RangeLinksConstIt;
+  typedef typename RangeLinksTy::const_iterator RangeLinksConstIt;
+  
+  typedef IntegersSubsetGeneric<IntTy> self;
   
 protected:
   
@@ -304,6 +305,26 @@ public:
     }
   }
   
+  IntegersSubsetGeneric(const self& RHS) {
+    *this = RHS;
+  }
+  
+  self& operator=(const self& RHS) {
+    FlatCollection.clear();
+    RangeLinks.clear();
+    for (RangeLinksConstIt i = RHS.RangeLinks.begin(), e = RHS.RangeLinks.end();
+         i != e; ++i) {
+      RangeLinkTy RangeLink;
+      FlatCollection.push_back(*(i->first));
+      RangeLink.first = &FlatCollection.back();
+      if (i->first != i->second)
+        FlatCollection.push_back(*(i->second));
+      RangeLink.second = &FlatCollection.back();
+      RangeLinks.push_back(RangeLink);
+    }
+    return *this;
+  }
+  
   typedef IntRange<IntTy> Range;
  
   /// Checks is the given constant satisfies this case. Returns
@@ -314,8 +335,8 @@ public:
       if (RangeLinks[i].first == RangeLinks[i].second) {
         if (*RangeLinks[i].first == CheckingVal)
           return true;
-      } else if (*RangeLinks[i].first >= CheckingVal &&
-                 *RangeLinks[i].second <= CheckingVal) 
+      } else if (*RangeLinks[i].first <= CheckingVal &&
+                 *RangeLinks[i].second >= CheckingVal) 
         return true;
     }
     return false;    
@@ -357,7 +378,7 @@ public:
     for (unsigned i = 0, e = getNumItems(); i != e; ++i) {
       const APInt &Low = getItem(i).getLow();
       const APInt &High = getItem(i).getHigh();
-      const APInt &S = High - Low;
+      APInt S = High - Low + 1;
       sz += S;
     }
     return sz.getZExtValue();    
@@ -372,12 +393,12 @@ public:
     for (unsigned i = 0, e = getNumItems(); i != e; ++i) {
       const APInt &Low = getItem(i).getLow();
       const APInt &High = getItem(i).getHigh();      
-      const APInt& S = High - Low;
+      APInt S = High - Low + 1;
       APInt oldSz = sz;
       sz += S;
-      if (oldSz.uge(i) && sz.ult(i)) {
+      if (sz.ugt(idx)) {
         APInt Res = Low;
-        APInt Offset(oldSz.getBitWidth(), i);
+        APInt Offset(oldSz.getBitWidth(), idx);
         Offset -= oldSz;
         Res += Offset;
         return Res;

include/llvm/Support/IntegersSubsetMapping.h

@@ -1,4 +1,4 @@
-//===- CRSBuilder.h - ConstantRangesSet Builder -----------------*- C++ -*-===//
+//===- IntegersSubsetMapping.h - Mapping subset ==> Successor ---*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -8,11 +8,12 @@
 //===----------------------------------------------------------------------===//
 //
 /// @file
-/// CRSBuilder allows to build and parse ConstantRangesSet objects.
-/// There is such features like add/remove range, or combine
-/// Two ConstantRangesSet object with neighboring ranges merging.
-/// Set IsReadonly=true if you want to operate with "const ConstantInt" and
-/// "const ConstantRangesSet" objects.
+/// IntegersSubsetMapping is mapping from A to B, where
+/// Items in A is subsets of integers,
+/// Items in B some pointers (Successors).
+/// If user which to add another subset for successor that is already
+/// exists in mapping, IntegersSubsetMapping merges existing subset with
+/// added one.
 //
 //===----------------------------------------------------------------------===//
 
@@ -55,6 +56,7 @@ protected:
   typedef std::list<RangeTy> RangesCollection;
   typedef typename RangesCollection::iterator RangesCollectionIt;
   
+  // TODO: Change unclean CRS prefixes to SubsetMap for example.
   typedef std::map<SuccessorClass*, RangesCollection > CRSMap;
   typedef typename CRSMap::iterator CRSMapIt;
 
@@ -112,7 +114,7 @@ public:
     sort();
     for (CaseItemIt i = Items.begin(), j = i+1, e = Items.end();
          j != e; i = j++) {
-      if (isIntersected(j, i) && j->second != i->second) {
+      if (isIntersected(i, j) && i->second != j->second) {
         errItem = j;
         return false;
       }
@@ -173,7 +175,7 @@ public:
   }  
   
   /// Adds all ranges and values from given ranges set to the current
-  /// CRSBuilder object.
+  /// mapping.
   void add(const IntegersSubset &CRS, SuccessorClass *S = 0) {
     for (unsigned i = 0, e = CRS.getNumItems(); i < e; ++i) {
       RangeTy R = CRS.getItem(i);