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Mark livein registers as being in used.

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llvm-svn: 34525
This commit is contained in:
Evan Cheng 2007-02-23 08:41:19 +00:00
parent 4bab3fa8a6
commit bdc95679a3
1 changed files with 6 additions and 0 deletions
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6
lib/CodeGen/RegisterScavenging.cpp
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@ -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() {