Skip over zero registers.

llvm-svn: 63748
2009-02-04 18:18:58 +00:00 · 2009-02-04 18:18:58 +00:00 · 9ec370f748
parent 370ec10dad
commit 9ec370f748
1 changed files with 2 additions and 0 deletions
--- a/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
+++ b/llvm/lib/CodeGen/SimpleRegisterCoalescing.cpp
@ -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())