For the NSWSub support in the builder to actually be useable,

there need to be corresponding changes to the constant folders,
done in this patch.

llvm-svn: 82862

4 files changed, 10 insertions, 0 deletions

diff --git a/llvm/include/llvm/Constants.h b/llvm/include/llvm/Constants.h
index 4999998078b..260a89a2d38 100644
--- a/llvm/include/llvm/Constants.h
+++ b/llvm/include/llvm/Constants.h
@@ -654,6 +654,7 @@ public:
   static Constant *getBitCast (Constant *C, const Type *Ty);
 
   static Constant* getNSWAdd(Constant* C1, Constant* C2);
+  static Constant* getNSWSub(Constant* C1, Constant* C2);
   static Constant* getExactSDiv(Constant* C1, Constant* C2);
 
   /// Transparently provide more efficient getOperand methods.
diff --git a/llvm/include/llvm/Support/ConstantFolder.h b/llvm/include/llvm/Support/ConstantFolder.h
index 3c9278aaa7a..99cb92078f3 100644
--- a/llvm/include/llvm/Support/ConstantFolder.h
+++ b/llvm/include/llvm/Support/ConstantFolder.h
@@ -44,6 +44,9 @@ public:
   Constant *CreateSub(Constant *LHS, Constant *RHS) const {
     return ConstantExpr::getSub(LHS, RHS);
   }
+  Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
+    return ConstantExpr::getNSWSub(LHS, RHS);
+  }
   Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
     return ConstantExpr::getFSub(LHS, RHS);
   }
diff --git a/llvm/include/llvm/Support/NoFolder.h b/llvm/include/llvm/Support/NoFolder.h
index 4540f028cee..1f671c19250 100644
--- a/llvm/include/llvm/Support/NoFolder.h
+++ b/llvm/include/llvm/Support/NoFolder.h
@@ -51,6 +51,9 @@ public:
   Value *CreateSub(Constant *LHS, Constant *RHS) const {
     return BinaryOperator::CreateSub(LHS, RHS);
   }
+  Value *CreateNSWSub(Constant *LHS, Constant *RHS) const {
+    return BinaryOperator::CreateNSWSub(LHS, RHS);
+  }
   Value *CreateFSub(Constant *LHS, Constant *RHS) const {
     return BinaryOperator::CreateFSub(LHS, RHS);
   }
diff --git a/llvm/include/llvm/Support/TargetFolder.h b/llvm/include/llvm/Support/TargetFolder.h
index 77533c00b13..8e28632b7eb 100644
--- a/llvm/include/llvm/Support/TargetFolder.h
+++ b/llvm/include/llvm/Support/TargetFolder.h
@@ -60,6 +60,9 @@ public:
   Constant *CreateSub(Constant *LHS, Constant *RHS) const {
     return Fold(ConstantExpr::getSub(LHS, RHS));
   }
+  Constant *CreateNSWSub(Constant *LHS, Constant *RHS) const {
+    return Fold(ConstantExpr::getNSWSub(LHS, RHS));
+  }
   Constant *CreateFSub(Constant *LHS, Constant *RHS) const {
     return Fold(ConstantExpr::getFSub(LHS, RHS));
   }