diff options
| -rw-r--r-- | include/llvm/Constants.h | 2 | ||||
| -rw-r--r-- | lib/VMCore/Constants.cpp | 16 |
2 files changed, 18 insertions, 0 deletions
diff --git a/include/llvm/Constants.h b/include/llvm/Constants.h index 2e471cb5dd..b5ba1b9671 100644 --- a/include/llvm/Constants.h +++ b/include/llvm/Constants.h @@ -544,6 +544,8 @@ public: /// Cast constant expr /// static Constant *getCast(Constant *C, const Type *Ty); + static Constant *getSignExtend(Constant *C, const Type *Ty); + static Constant *getZeroExtend(Constant *C, const Type *Ty); /// Select constant expr /// diff --git a/lib/VMCore/Constants.cpp b/lib/VMCore/Constants.cpp index 6c6557dccd..3ed70089c1 100644 --- a/lib/VMCore/Constants.cpp +++ b/lib/VMCore/Constants.cpp @@ -1131,6 +1131,22 @@ Constant *ConstantExpr::getCast(Constant *C, const Type *Ty) { return ExprConstants.getOrCreate(Ty, Key); } +Constant *ConstantExpr::getSignExtend(Constant *C, const Type *Ty) { + assert(C->getType()->isInteger() && Ty->isInteger() && + C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() && + "This is an illegal sign extension!"); + C = ConstantExpr::getCast(C, C->getType()->getSignedVersion()); + return ConstantExpr::getCast(C, Ty); +} + +Constant *ConstantExpr::getZeroExtend(Constant *C, const Type *Ty) { + assert(C->getType()->isInteger() && Ty->isInteger() && + C->getType()->getPrimitiveSize() <= Ty->getPrimitiveSize() && + "This is an illegal zero extension!"); + C = ConstantExpr::getCast(C, C->getType()->getUnsignedVersion()); + return ConstantExpr::getCast(C, Ty); +} + Constant *ConstantExpr::getTy(const Type *ReqTy, unsigned Opcode, Constant *C1, Constant *C2) { if (Opcode == Instruction::Shl || Opcode == Instruction::Shr) |