diff options
Diffstat (limited to 'llvm/lib/CodeGen/MachineRegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineRegisterInfo.cpp | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp index 511bb80..dc109cd 100644 --- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp +++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp @@ -420,6 +420,16 @@ bool MachineRegisterInfo::hasOneNonDBGUser(Register RegNo) const { return hasSingleElement(use_nodbg_instructions(RegNo)); } +bool MachineRegisterInfo::hasAtMostUserInstrs(Register Reg, + unsigned MaxUsers) const { + unsigned NumUsers = 0; + auto UI = use_instr_nodbg_begin(Reg), UE = use_instr_nodbg_end(); + for (; UI != UE && NumUsers < MaxUsers; ++UI) + NumUsers++; + // If we haven't reached the end yet then there are more than MaxUses users. + return UI == UE; +} + /// clearKillFlags - Iterate over all the uses of the given register and /// clear the kill flag from the MachineOperand. This function is used by /// optimization passes which extend register lifetimes and need only |