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Eliminate data relocations by using NULL instead of global empty list.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey
2006-07-21 21:15:20 +00:00
parent 60f09928a0
commit cd4317efcf
6 changed files with 50 additions and 37 deletions
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10
lib/CodeGen/VirtRegMap.cpp
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@@ -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);