diff options
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index 02278e9e42..47ca28cea9 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -83,6 +83,10 @@ public: /// isSetCCExpensive - Return true if the setcc operation is expensive for /// this target. bool isSetCCExpensive() const { return SetCCIsExpensive; } + + /// isIntDivExpensive() - Return true if integer divide is more expensive than + /// a sequence of several shifts, adds, and multiplies for this target. + bool isIntDivExpensive() const { return IntDivIsExpensive; } /// getSetCCResultTy - Return the ValueType of the result of setcc operations. /// @@ -262,6 +266,11 @@ protected: /// setcc operations into other operations if possible. void setSetCCIsExpensive() { SetCCIsExpensive = true; } + /// setIntDivIsExpensive - Tells the code generator that integer divide is + /// expensive, and if possible, should be replaced by an alternate sequence + /// of instructions not containing an integer divide. + void setIntDivIsExpensive() { IntDivIsExpensive = true; } + /// addRegisterClass - Add the specified register class as an available /// regclass for the specified value type. This indicates the selector can /// handle values of that class natively. @@ -391,6 +400,13 @@ private: /// setcc operations into other operations if possible. bool SetCCIsExpensive; + /// IntDivIsExpensive - This is a hack until a real costs model is in place + /// that tells the code generator whether integer divide will always be more + /// expensive than a sequence of multiplies, shifts, and adds that performs + /// the same operation. If we ever optimize for size, this will be set to + /// false unconditionally. + bool IntDivIsExpensive; + /// SetCCResultTy - The type that SetCC operations use. This defaults to the /// PointerTy. MVT::ValueType SetCCResultTy; |