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| author | Evan Cheng <evan.cheng@apple.com> | 2009-07-22 21:51:42 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2009-07-22 21:51:42 +0000 |
| commit | d2d52d1906b8105b3ad8ef393950be6088bcfc59 (patch) | |
| tree | 827af98d6fce4fa78ed8da7fe6af07130f8c3203 /llvm/lib/CodeGen | |
| parent | 5b9b066aebcb0892ac9d0265ac7b2e68429dad3f (diff) | |
| download | bcm5719-llvm-d2d52d1906b8105b3ad8ef393950be6088bcfc59.tar.gz bcm5719-llvm-d2d52d1906b8105b3ad8ef393950be6088bcfc59.zip | |
Ignore undef uses.
llvm-svn: 76799
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/RegisterScavenging.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/RegisterScavenging.cpp b/llvm/lib/CodeGen/RegisterScavenging.cpp index 98f485045f6..972cf13a240 100644 --- a/llvm/lib/CodeGen/RegisterScavenging.cpp +++ b/llvm/lib/CodeGen/RegisterScavenging.cpp @@ -155,6 +155,9 @@ static bool isLiveInButUnusedBefore(unsigned Reg, MachineInstr *MI, SmallPtrSet<MachineInstr*, 4> UsesInMBB; for (MachineRegisterInfo::use_iterator UI = MRI->use_begin(Reg), UE = MRI->use_end(); UI != UE; ++UI) { + MachineOperand &UseMO = UI.getOperand(); + if (UseMO.isReg() && UseMO.isUndef()) + continue; MachineInstr *UseMI = &*UI; if (UseMI->getParent() == MBB) UsesInMBB.insert(UseMI); |
