diff options
Diffstat (limited to 'include/llvm/CodeGen/MachineOperand.h')
| -rw-r--r-- | include/llvm/CodeGen/MachineOperand.h | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/include/llvm/CodeGen/MachineOperand.h b/include/llvm/CodeGen/MachineOperand.h index c09d9f1251..1d3d60bdb2 100644 --- a/include/llvm/CodeGen/MachineOperand.h +++ b/include/llvm/CodeGen/MachineOperand.h @@ -60,12 +60,15 @@ private: /// union. unsigned char OpKind; // MachineOperandType - /// SubReg - Subregister number, only valid for MO_Register. A value of 0 - /// indicates the MO_Register has no subReg. - unsigned char SubReg; + // This union is discriminated by OpKind. + union { + /// SubReg - Subregister number, only valid for MO_Register. A value of 0 + /// indicates the MO_Register has no subReg. + unsigned char SubReg; - /// TargetFlags - This is a set of target-specific operand flags. - unsigned char TargetFlags; + /// TargetFlags - This is a set of target-specific operand flags. + unsigned char TargetFlags; + }; /// IsDef/IsImp/IsKill/IsDead flags - These are only valid for MO_Register /// operands. @@ -176,9 +179,17 @@ public: /// MachineOperandType getType() const { return (MachineOperandType)OpKind; } - unsigned char getTargetFlags() const { return TargetFlags; } - void setTargetFlags(unsigned char F) { TargetFlags = F; } - void addTargetFlag(unsigned char F) { TargetFlags |= F; } + unsigned char getTargetFlags() const { + return isReg() ? 0 : TargetFlags; + } + void setTargetFlags(unsigned char F) { + assert(!isReg() && "Register operands can't have target flags"); + TargetFlags = F; + } + void addTargetFlag(unsigned char F) { + assert(!isReg() && "Register operands can't have target flags"); + TargetFlags |= F; + } /// getParent - Return the instruction that this operand belongs to. |