Add MachineRegisterInfo::hasOneUse and hasOneNonDBGUse.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97663 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/TwoAddressInstructionPass.cpp b/lib/CodeGen/TwoAddressInstructionPass.cpp
index 0ba3843..c840b39 100644
--- a/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -454,13 +454,10 @@
const TargetInstrInfo *TII,
bool &IsCopy,
unsigned &DstReg, bool &IsDstPhys) {
- MachineRegisterInfo::use_nodbg_iterator UI = MRI->use_nodbg_begin(Reg);
- if (UI == MRI->use_nodbg_end())
+ if (!MRI->hasOneNonDBGUse(Reg))
+ // None or more than one use.
return 0;
- MachineInstr &UseMI = *UI;
- if (++UI != MRI->use_nodbg_end())
- // More than one use.
- return 0;
+ MachineInstr &UseMI = *MRI->use_nodbg_begin(Reg);
if (UseMI.getParent() != MBB)
return 0;
unsigned SrcReg;