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Skip over zero registers.

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llvm-svn: 63748
This commit is contained in:
Evan Cheng 2009-02-04 18:18:58 +00:00
parent 9e3a296933
commit 04be5342b1
1 changed files with 2 additions and 0 deletions
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2
lib/CodeGen/SimpleRegisterCoalescing.cpp
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@ -2449,6 +2449,8 @@ bool SimpleRegisterCoalescing::runOnMachineFunction(MachineFunction &fn) {
if (!MO.isReg())
continue;
unsigned Reg = MO.getReg();
if (!Reg)
continue;
if (TargetRegisterInfo::isVirtualRegister(Reg))
DeadDefs.push_back(Reg);
if (MO.isDead())