Move a bit more state over to the LLVMContext.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76533 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Constants.h

@@ -93,16 +93,6 @@ public:
     return Val == V;
   }
 
-  /// getTrue/getFalse - Return the singleton true/false values.
-  static inline ConstantInt *getTrue() {
-    if (TheTrueVal) return TheTrueVal;
-    return CreateTrueFalseVals(true);
-  }
-  static inline ConstantInt *getFalse() {
-    if (TheFalseVal) return TheFalseVal;
-    return CreateTrueFalseVals(false);
-  }
-
   /// getType - Specialize the getType() method to always return an IntegerType,
   /// which reduces the amount of casting needed in parts of the compiler.
   ///
@@ -200,9 +190,6 @@ public:
   static bool classof(const Value *V) {
     return V->getValueID() == ConstantIntVal;
   }
-  static void ResetTrueFalse() { TheTrueVal = TheFalseVal = 0; }
-private:
-  static ConstantInt *CreateTrueFalseVals(bool WhichOne);
 };
 
 

lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp

@@ -1149,7 +1149,7 @@ SelectionDAGLowering::EmitBranchForMergedCondition(Value *Cond,
   }
 
   // Create a CaseBlock record representing this branch.
-  CaseBlock CB(ISD::SETEQ, Cond, ConstantInt::getTrue(),
+  CaseBlock CB(ISD::SETEQ, Cond, DAG.getContext()->getConstantIntTrue(),
                NULL, TBB, FBB, CurBB);
   SwitchCases.push_back(CB);
 }
@@ -1304,7 +1304,7 @@ void SelectionDAGLowering::visitBr(BranchInst &I) {
   }
 
   // Create a CaseBlock record representing this branch.
-  CaseBlock CB(ISD::SETEQ, CondVal, ConstantInt::getTrue(),
+  CaseBlock CB(ISD::SETEQ, CondVal, DAG.getContext()->getConstantIntTrue(),
                NULL, Succ0MBB, Succ1MBB, CurMBB);
   // Use visitSwitchCase to actually insert the fast branch sequence for this
   // cond branch.
@@ -1322,9 +1322,11 @@ void SelectionDAGLowering::visitSwitchCase(CaseBlock &CB) {
   if (CB.CmpMHS == NULL) {
     // Fold "(X == true)" to X and "(X == false)" to !X to
     // handle common cases produced by branch lowering.
-    if (CB.CmpRHS == ConstantInt::getTrue() && CB.CC == ISD::SETEQ)
+    if (CB.CmpRHS == DAG.getContext()->getConstantIntTrue() &&
+        CB.CC == ISD::SETEQ)
       Cond = CondLHS;
-    else if (CB.CmpRHS == ConstantInt::getFalse() && CB.CC == ISD::SETEQ) {
+    else if (CB.CmpRHS == DAG.getContext()->getConstantIntFalse() &&
+             CB.CC == ISD::SETEQ) {
       SDValue True = DAG.getConstant(1, CondLHS.getValueType());
       Cond = DAG.getNode(ISD::XOR, dl, CondLHS.getValueType(), CondLHS, True);
     } else

lib/Transforms/Scalar/PredicateSimplifier.cpp

@@ -1690,8 +1690,8 @@ namespace {
     bool isRelatedBy(Value *V1, Value *V2, ICmpInst::Predicate Pred) const {
       if (Constant *C1 = dyn_cast<Constant>(V1))
         if (Constant *C2 = dyn_cast<Constant>(V2))
-          return ConstantExpr::getCompare(Pred, C1, C2) ==
-                 ConstantInt::getTrue();
+          return Context->getConstantExprCompare(Pred, C1, C2) ==
+                 Context->getConstantIntTrue();
 
       unsigned n1 = VN.valueNumber(V1, Top);
       unsigned n2 = VN.valueNumber(V2, Top);
@@ -1803,10 +1803,10 @@ namespace {
         // "icmp ult i32 %a, %y" EQ true then %a u< y
         // etc.
 
-        if (Canonical == ConstantInt::getTrue()) {
+        if (Canonical == Context->getConstantIntTrue()) {
           add(IC->getOperand(0), IC->getOperand(1), IC->getPredicate(),
               NewContext);
-        } else if (Canonical == ConstantInt::getFalse()) {
+        } else if (Canonical == Context->getConstantIntFalse()) {
           add(IC->getOperand(0), IC->getOperand(1),
               ICmpInst::getInversePredicate(IC->getPredicate()), NewContext);
         }
@@ -1822,11 +1822,11 @@ namespace {
         if (isRelatedBy(True, False, ICmpInst::ICMP_NE)) {
           if (Canonical == VN.canonicalize(True, Top) ||
               isRelatedBy(Canonical, False, ICmpInst::ICMP_NE))
-            add(SI->getCondition(), ConstantInt::getTrue(),
+            add(SI->getCondition(), Context->getConstantIntTrue(),
                 ICmpInst::ICMP_EQ, NewContext);
           else if (Canonical == VN.canonicalize(False, Top) ||
                    isRelatedBy(Canonical, True, ICmpInst::ICMP_NE))
-            add(SI->getCondition(), ConstantInt::getFalse(),
+            add(SI->getCondition(), Context->getConstantIntFalse(),
                 ICmpInst::ICMP_EQ, NewContext);
         }
       } else if (GetElementPtrInst *GEPI = dyn_cast<GetElementPtrInst>(I)) {
@@ -2050,9 +2050,10 @@ namespace {
 
         ICmpInst::Predicate Pred = IC->getPredicate();
         if (isRelatedBy(Op0, Op1, Pred))
-          add(IC, ConstantInt::getTrue(), ICmpInst::ICMP_EQ, NewContext);
+          add(IC, Context->getConstantIntTrue(), ICmpInst::ICMP_EQ, NewContext);
         else if (isRelatedBy(Op0, Op1, ICmpInst::getInversePredicate(Pred)))
-          add(IC, ConstantInt::getFalse(), ICmpInst::ICMP_EQ, NewContext);
+          add(IC, Context->getConstantIntFalse(),
+              ICmpInst::ICMP_EQ, NewContext);
 
       } else if (SelectInst *SI = dyn_cast<SelectInst>(I)) {
         if (I->getType()->isFPOrFPVector()) return;
@@ -2063,9 +2064,9 @@ namespace {
         // %b EQ %c then %a EQ %b
 
         Value *Canonical = VN.canonicalize(SI->getCondition(), Top);
-        if (Canonical == ConstantInt::getTrue()) {
+        if (Canonical == Context->getConstantIntTrue()) {
           add(SI, SI->getTrueValue(), ICmpInst::ICMP_EQ, NewContext);
-        } else if (Canonical == ConstantInt::getFalse()) {
+        } else if (Canonical == Context->getConstantIntFalse()) {
           add(SI, SI->getFalseValue(), ICmpInst::ICMP_EQ, NewContext);
         } else if (VN.canonicalize(SI->getTrueValue(), Top) ==
                    VN.canonicalize(SI->getFalseValue(), Top)) {
@@ -2154,8 +2155,8 @@ namespace {
         // the BB as unreachable if so.
         if (Constant *CI_L = dyn_cast<Constant>(O.LHS)) {
           if (Constant *CI_R = dyn_cast<Constant>(O.RHS)) {
-            if (ConstantExpr::getCompare(O.Op, CI_L, CI_R) ==
-                ConstantInt::getFalse())
+            if (Context->getConstantExprCompare(O.Op, CI_L, CI_R) ==
+                Context->getConstantIntFalse())
               UB.mark(TopBB);
 
             WorkList.pop_front();
@@ -2446,6 +2447,8 @@ namespace {
       return;
     }
 
+    LLVMContext *Context = BI.getParent()->getContext();
+
     for (DomTreeDFS::Node::iterator I = DTNode->begin(), E = DTNode->end();
          I != E; ++I) {
       BasicBlock *Dest = (*I)->getBlock();
@@ -2455,7 +2458,7 @@ namespace {
       if (Dest == TrueDest) {
         DOUT << "(" << DTNode->getBlock()->getName() << ") true set:\n";
         VRPSolver VRP(VN, IG, UB, VR, PS->DTDFS, PS->modified, Dest);
-        VRP.add(ConstantInt::getTrue(), Condition, ICmpInst::ICMP_EQ);
+        VRP.add(Context->getConstantIntTrue(), Condition, ICmpInst::ICMP_EQ);
         VRP.solve();
         DEBUG(VN.dump());
         DEBUG(IG.dump());
@@ -2463,7 +2466,7 @@ namespace {
       } else if (Dest == FalseDest) {
         DOUT << "(" << DTNode->getBlock()->getName() << ") false set:\n";
         VRPSolver VRP(VN, IG, UB, VR, PS->DTDFS, PS->modified, Dest);
-        VRP.add(ConstantInt::getFalse(), Condition, ICmpInst::ICMP_EQ);
+        VRP.add(Context->getConstantIntFalse(), Condition, ICmpInst::ICMP_EQ);
         VRP.solve();
         DEBUG(VN.dump());
         DEBUG(IG.dump());

lib/VMCore/Constants.cpp

@@ -169,28 +169,6 @@ ConstantInt::ConstantInt(const IntegerType *Ty, const APInt& V)
   assert(V.getBitWidth() == Ty->getBitWidth() && "Invalid constant for type");
 }
 
-ConstantInt *ConstantInt::TheTrueVal = 0;
-ConstantInt *ConstantInt::TheFalseVal = 0;
-
-namespace llvm {
-  void CleanupTrueFalse(void *) {
-    ConstantInt::ResetTrueFalse();
-  }
-}
-
-static ManagedCleanup<llvm::CleanupTrueFalse> TrueFalseCleanup;
-
-ConstantInt *ConstantInt::CreateTrueFalseVals(bool WhichOne) {
-  assert(TheTrueVal == 0 && TheFalseVal == 0);
-  TheTrueVal  = getGlobalContext().getConstantInt(Type::Int1Ty, 1);
-  TheFalseVal = getGlobalContext().getConstantInt(Type::Int1Ty, 0);
-  
-  // Ensure that llvm_shutdown nulls out TheTrueVal/TheFalseVal.
-  TrueFalseCleanup.Register();
-  
-  return WhichOne ? TheTrueVal : TheFalseVal;
-}
-
 //===----------------------------------------------------------------------===//
 //                                ConstantFP
 //===----------------------------------------------------------------------===//

lib/VMCore/LLVMContext.cpp

@@ -81,11 +81,15 @@ UndefValue* LLVMContext::getUndef(const Type* Ty) {
 
 // ConstantInt accessors.
 ConstantInt* LLVMContext::getConstantIntTrue() {
-  return ConstantInt::getTrue();
+  assert(this && "Context not initialized!");
+  assert(pImpl && "Context not initialized!");
+  return pImpl->getConstantIntTrue();
 }
 
 ConstantInt* LLVMContext::getConstantIntFalse() {
-  return ConstantInt::getFalse();
+  assert(this && "Context not initialized!");
+  assert(pImpl && "Context not initialized!");
+  return pImpl->getConstantIntFalse();
 }
 
 Constant* LLVMContext::getConstantInt(const Type* Ty, uint64_t V,

lib/VMCore/LLVMContextImpl.h

@@ -15,6 +15,8 @@
 #ifndef LLVM_LLVMCONTEXT_IMPL_H
 #define LLVM_LLVMCONTEXT_IMPL_H
 
+#include "llvm/LLVMContext.h"
+#include "llvm/DerivedTypes.h"
 #include "llvm/System/RWMutex.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/APInt.h"
@@ -100,10 +102,13 @@ class LLVMContextImpl {
   FoldingSet<MDNode> MDNodeSet;
   
   LLVMContext &Context;
+  ConstantInt *TheTrueVal;
+  ConstantInt *TheFalseVal;
+  
   LLVMContextImpl();
   LLVMContextImpl(const LLVMContextImpl&);
 public:
-  LLVMContextImpl(LLVMContext &C) : Context(C) { }
+  LLVMContextImpl(LLVMContext &C) : Context(C), TheTrueVal(0), TheFalseVal(0) {} 
   
   /// Return a ConstantInt with the specified value and an implied Type. The
   /// type is the integer type that corresponds to the bit width of the value.
@@ -115,6 +120,20 @@ public:
   
   MDNode *getMDNode(Value*const* Vals, unsigned NumVals);
   
+  ConstantInt *getConstantIntTrue() {
+    if (TheTrueVal)
+      return TheTrueVal;
+    else
+      return (TheTrueVal = Context.getConstantInt(IntegerType::get(1), 1));
+  }
+  
+  ConstantInt *getConstantIntFalse() {
+    if (TheFalseVal)
+      return TheFalseVal;
+    else
+      return (TheFalseVal = Context.getConstantInt(IntegerType::get(1), 0));
+  }
+  
   void erase(MDString *M);
   void erase(MDNode *M);
 };