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ScheduleDAGInstrs: When adding uses we add them into a set that's empty at the beginning, no need to maintain another set for the added regs.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152934 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Benjamin Kramer 2012-03-16 17:38:19 +00:00
parent 861ea230a7
commit a82d526b31
1 changed files with 2 additions and 2 deletions
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4
lib/CodeGen/ScheduleDAGInstrs.cpp
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@ -209,13 +209,13 @@ void ScheduleDAGInstrs::addSchedBarrierDeps() {
} else {
// For others, e.g. fallthrough, conditional branch, assume the exit
// uses all the registers that are livein to the successor blocks.
SmallSet<unsigned, 8> Seen;
assert(Uses.empty() && "Uses in set before adding deps?");
for (MachineBasicBlock::succ_iterator SI = BB->succ_begin(),
SE = BB->succ_end(); SI != SE; ++SI)
for (MachineBasicBlock::livein_iterator I = (*SI)->livein_begin(),
E = (*SI)->livein_end(); I != E; ++I) {
unsigned Reg = *I;
if (Seen.insert(Reg))
if (!Uses.contains(Reg))
Uses[Reg].push_back(&ExitSU);
}
}