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| author | Evan Cheng <evan.cheng@apple.com> | 2007-02-23 08:41:19 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-02-23 08:41:19 +0000 |
| commit | 403c45dfcc74585b02339b5f55f739672e3d141a (patch) | |
| tree | d2d09ae2c736912121c81bd6afbb8cb089e85310 /lib/CodeGen/RegisterScavenging.cpp | |
| parent | d5e2d40693af9838d6a6504959536ed81c185540 (diff) | |
| download | external_llvm-403c45dfcc74585b02339b5f55f739672e3d141a.zip external_llvm-403c45dfcc74585b02339b5f55f739672e3d141a.tar.gz external_llvm-403c45dfcc74585b02339b5f55f739672e3d141a.tar.bz2 | |
Mark livein registers as being in used.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34525 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/RegisterScavenging.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index 5aa2ca3..0938e3a 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -43,6 +43,12 @@ RegScavenger::RegScavenger(MachineBasicBlock *mbb) if (CSRegs != NULL) for (unsigned i = 0; CSRegs[i]; ++i) CalleeSavedRegs.set(CSRegs[i]); + + // Live-in registers are in use. + if (!MBB->livein_empty()) + for (MachineBasicBlock::const_livein_iterator I = MBB->livein_begin(), + E = MBB->livein_end(); I != E; ++I) + setUsed(*I); } void RegScavenger::forward() { |