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| author | Jim Laskey <jlaskey@mac.com> | 2006-07-21 21:15:20 +0000 |
|---|---|---|
| committer | Jim Laskey <jlaskey@mac.com> | 2006-07-21 21:15:20 +0000 |
| commit | cd4317efcf334be10d9a98008a1445d6e12a7712 (patch) | |
| tree | 82f4e6381dbe6669926e797094654c0f430ed18c /lib/CodeGen/VirtRegMap.cpp | |
| parent | 60f09928a0d22d5927ff0a40fe9163cf1ba1014a (diff) | |
| download | external_llvm-cd4317efcf334be10d9a98008a1445d6e12a7712.zip external_llvm-cd4317efcf334be10d9a98008a1445d6e12a7712.tar.gz external_llvm-cd4317efcf334be10d9a98008a1445d6e12a7712.tar.bz2 | |
Eliminate data relocations by using NULL instead of global empty list.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29250 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/VirtRegMap.cpp')
| -rw-r--r-- | lib/CodeGen/VirtRegMap.cpp | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp index 86fef3e..bc56945 100644 --- a/lib/CodeGen/VirtRegMap.cpp +++ b/lib/CodeGen/VirtRegMap.cpp @@ -671,10 +671,12 @@ void LocalSpiller::RewriteMBB(MachineBasicBlock &MBB, VirtRegMap &VRM) { // Loop over all of the implicit defs, clearing them from our available // sets. - for (const unsigned *ImpDef = TII->getImplicitDefs(MI.getOpcode()); - *ImpDef; ++ImpDef) { - PhysRegsUsed[*ImpDef] = true; - Spills.ClobberPhysReg(*ImpDef); + const unsigned *ImpDef = TII->getImplicitDefs(MI.getOpcode()); + if (ImpDef) { + for ( ; *ImpDef; ++ImpDef) { + PhysRegsUsed[*ImpDef] = true; + Spills.ClobberPhysReg(*ImpDef); + } } DEBUG(std::cerr << '\t' << MI); |