diff options
| -rw-r--r-- | include/llvm/Constants.h | 4 | ||||
| -rw-r--r-- | lib/VMCore/Constants.cpp | 7 |
2 files changed, 11 insertions, 0 deletions
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index 91e7b208a2..99b768f69b 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -562,6 +562,10 @@ public: /// static Constant *getSizeOf(const Type *Ty); + /// getPtrPtrFromArrayPtr constant expr - given a pointer to a constant array, + /// return a pointer to a pointer of the array element type. + static Constant *getPtrPtrFromArrayPtr(Constant *C); + /// ConstantExpr::get - Return a binary or shift operator constant expression, /// folding if possible. /// diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp index 71754fdac4..ee60f804b3 100644 --- a/lib/VMCore/Constants.cpp +++ b/lib/VMCore/Constants.cpp @@ -1298,6 +1298,13 @@ Constant *ConstantExpr::getSizeOf(const Type *Ty) { Type::ULongTy); } +Constant *ConstantExpr::getPtrPtrFromArrayPtr(Constant *C) { + // pointer from array is implemented as: getelementptr arr ptr, 0, 0 + static std::vector<Constant*> Indices(2, ConstantUInt::get(Type::UIntTy, 0)); + + return ConstantExpr::getGetElementPtr(C, Indices); +} + Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode, Constant *C1, Constant *C2) { if (Opcode == Instruction::Shl || Opcode == Instruction::Shr) |