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| author | Evan Cheng <evan.cheng@apple.com> | 2010-05-24 21:33:37 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2010-05-24 21:33:37 +0000 |
| commit | 3946043a80a043b3cf43b34bf068feaadc46485b (patch) | |
| tree | 221c20a608f7c7306aa8cfd26855c9d98b1b7d0f /lib/CodeGen/MachineRegisterInfo.cpp | |
| parent | e350690e3b0b33255ad9b8f152da4dff43014f9b (diff) | |
| download | llvm-3946043a80a043b3cf43b34bf068feaadc46485b.tar.gz llvm-3946043a80a043b3cf43b34bf068feaadc46485b.tar.bz2 llvm-3946043a80a043b3cf43b34bf068feaadc46485b.tar.xz | |
Avoid adding duplicate function live-in's.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104560 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineRegisterInfo.cpp')
| -rw-r--r-- | lib/CodeGen/MachineRegisterInfo.cpp | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp index 402be479ea..70bf7e5da5 100644 --- a/lib/CodeGen/MachineRegisterInfo.cpp +++ b/lib/CodeGen/MachineRegisterInfo.cpp @@ -165,6 +165,15 @@ unsigned MachineRegisterInfo::getLiveInPhysReg(unsigned VReg) const { return 0; } +/// getLiveInVirtReg - If PReg is a live-in physical register, return the +/// corresponding live-in physical register. +unsigned MachineRegisterInfo::getLiveInVirtReg(unsigned PReg) const { + for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I) + if (I->first == PReg) + return I->second; + return 0; +} + static cl::opt<bool> SchedLiveInCopies("schedule-livein-copies", cl::Hidden, cl::desc("Schedule copies of livein registers"), |