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| author | Matthias Braun <matze@braunis.de> | 2014-12-10 01:12:10 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2014-12-10 01:12:10 +0000 |
| commit | 3f1d8fdd33af8241bbd0ee0a2fa9d0d31eccd787 (patch) | |
| tree | 67ffd6bed551e905735922c09ba298459cfd092c /llvm/lib/CodeGen/MachineRegisterInfo.cpp | |
| parent | e62c2070927f1304d9bfa17fb5084b01acf5e68b (diff) | |
| download | bcm5719-llvm-3f1d8fdd33af8241bbd0ee0a2fa9d0d31eccd787.tar.gz bcm5719-llvm-3f1d8fdd33af8241bbd0ee0a2fa9d0d31eccd787.zip | |
LiveInterval: Add support to track liveness of subregisters.
This code adds the required data structures. Algorithms to compute it follow.
llvm-svn: 223877
Diffstat (limited to 'llvm/lib/CodeGen/MachineRegisterInfo.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/MachineRegisterInfo.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/MachineRegisterInfo.cpp b/llvm/lib/CodeGen/MachineRegisterInfo.cpp index e9612f3cfde..c2fc4a7de46 100644 --- a/llvm/lib/CodeGen/MachineRegisterInfo.cpp +++ b/llvm/lib/CodeGen/MachineRegisterInfo.cpp @@ -391,6 +391,14 @@ MachineRegisterInfo::EmitLiveInCopies(MachineBasicBlock *EntryMBB, } } +unsigned MachineRegisterInfo::getMaxLaneMaskForVReg(unsigned Reg) const +{ + // Lane masks are only defined for vregs. + assert(TargetRegisterInfo::isVirtualRegister(Reg)); + const TargetRegisterClass &TRC = *getRegClass(Reg); + return TRC.getLaneMask(); +} + #ifndef NDEBUG void MachineRegisterInfo::dumpUses(unsigned Reg) const { for (MachineInstr &I : use_instructions(Reg)) |
