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| author | Andrew Trick <atrick@apple.com> | 2012-07-30 23:48:14 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-07-30 23:48:14 +0000 |
| commit | 0492a8c530df6c7b2ebcfa91fed930c1a1bf664d (patch) | |
| tree | d75460480081b2dae3b3b20cee2e6c23c51edae3 /include/llvm/CodeGen/MachineRegisterInfo.h | |
| parent | 269120cd9b45b24665433ea28eb7d092c138ca76 (diff) | |
| download | external_llvm-0492a8c530df6c7b2ebcfa91fed930c1a1bf664d.zip external_llvm-0492a8c530df6c7b2ebcfa91fed930c1a1bf664d.tar.gz external_llvm-0492a8c530df6c7b2ebcfa91fed930c1a1bf664d.tar.bz2 | |
Added MachineRegisterInfo::hasOneDef()
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161009 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/CodeGen/MachineRegisterInfo.h')
| -rw-r--r-- | include/llvm/CodeGen/MachineRegisterInfo.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h index 1c2baef..061d60a 100644 --- a/include/llvm/CodeGen/MachineRegisterInfo.h +++ b/include/llvm/CodeGen/MachineRegisterInfo.h @@ -172,6 +172,15 @@ public: /// specified register (it may be live-in). bool def_empty(unsigned RegNo) const { return def_begin(RegNo) == def_end(); } + /// hasOneDef - Return true if there is exactly one instruction defining the + /// specified register. + bool hasOneDef(unsigned RegNo) const { + def_iterator DI = def_begin(RegNo); + if (DI == def_end()) + return false; + return ++DI == def_end(); + } + /// use_iterator/use_begin/use_end - Walk all uses of the specified register. typedef defusechain_iterator<true,false,false> use_iterator; use_iterator use_begin(unsigned RegNo) const { |