diff options
Diffstat (limited to 'include/llvm/Support/IRBuilder.h')
| -rw-r--r-- | include/llvm/Support/IRBuilder.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/include/llvm/Support/IRBuilder.h b/include/llvm/Support/IRBuilder.h index b2619a5..a8663d2 100644 --- a/include/llvm/Support/IRBuilder.h +++ b/include/llvm/Support/IRBuilder.h @@ -241,6 +241,12 @@ public: return Folder.CreateSDiv(LC, RC); return Insert(BinaryOperator::CreateSDiv(LHS, RHS), Name); } + Value *CreateExactSDiv(Value *LHS, Value *RHS, const char *Name = "") { + if (Constant *LC = dyn_cast<Constant>(LHS)) + if (Constant *RC = dyn_cast<Constant>(RHS)) + return Folder.CreateExactSDiv(LC, RC); + return Insert(BinaryOperator::CreateExactSDiv(LHS, RHS), Name); + } Value *CreateFDiv(Value *LHS, Value *RHS, const char *Name = "") { if (Constant *LC = dyn_cast<Constant>(LHS)) if (Constant *RC = dyn_cast<Constant>(RHS)) @@ -719,7 +725,9 @@ public: /// CreatePtrDiff - Return the i64 difference between two pointer values, /// dividing out the size of the pointed-to objects. This is intended to - /// implement C-style pointer subtraction. + /// implement C-style pointer subtraction. As such, the pointers must be + /// appropriately aligned for their element types and pointing into the + /// same object. Value *CreatePtrDiff(Value *LHS, Value *RHS, const char *Name = "") { assert(LHS->getType() == RHS->getType() && "Pointer subtraction operand types must match!"); @@ -727,9 +735,9 @@ public: Value *LHS_int = CreatePtrToInt(LHS, Type::Int64Ty); Value *RHS_int = CreatePtrToInt(RHS, Type::Int64Ty); Value *Difference = CreateSub(LHS_int, RHS_int); - return CreateSDiv(Difference, - ConstantExpr::getSizeOf(ArgType->getElementType()), - Name); + return CreateExactSDiv(Difference, + ConstantExpr::getSizeOf(ArgType->getElementType()), + Name); } }; |