diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/MachineRegisterInfo.h | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h index 68905e3c5e..42a8aa43d9 100644 --- a/include/llvm/CodeGen/MachineRegisterInfo.h +++ b/include/llvm/CodeGen/MachineRegisterInfo.h @@ -513,11 +513,20 @@ public: assert(Op && "Cannot increment end iterator!"); Op = getNextOperandForReg(Op); - // If this is an operand we don't care about, skip it. - while (Op && ((!ReturnUses && Op->isUse()) || - (!ReturnDefs && Op->isDef()) || - (SkipDebug && Op->isDebug()))) - Op = getNextOperandForReg(Op); + // All defs come before the uses, so stop def_iterator early. + if (!ReturnUses) { + if (Op) { + if (Op->isUse()) + Op = 0; + else + assert(!Op->isDebug() && "Can't have debug defs"); + } + } else { + // If this is an operand we don't care about, skip it. + while (Op && ((!ReturnDefs && Op->isDef()) || + (SkipDebug && Op->isDebug()))) + Op = getNextOperandForReg(Op); + } return *this; } |