diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/Instruction.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/llvm/Instruction.h b/include/llvm/Instruction.h index 89c64098c3..ca01e30fe5 100644 --- a/include/llvm/Instruction.h +++ b/include/llvm/Instruction.h @@ -74,6 +74,27 @@ public: return iType >= BinaryOpsBegin && iType < BinaryOpsEnd; } + /// isAssociative - Return true if the instruction is associative: + /// + /// Associative operators satisfy: x op (y op z) === (x op y) op z) + /// + /// In LLVM, the Add, Mul, And, Or, and Xor operators are associative, when + /// not applied to floating point types. + /// + bool isAssociative() const { return isAssociative(getOpcode(), getType()); } + static bool isAssociative(unsigned op, const Type *Ty); + + /// isCommutative - Return true if the instruction is commutative: + /// + /// Commutative operators satistify: (x op y) === (y op x) + /// + /// In LLVM, these are the associative operators, plus SetEQ and SetNE, when + /// applied to any type. + /// + bool isCommutative() const { return isCommutative(getOpcode()); } + static bool isCommutative(unsigned op); + + virtual void print(std::ostream &OS) const; /// Methods for support type inquiry through isa, cast, and dyn_cast: |