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Sorting is now handled by both linearscan and iterative scan so live

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intervals need not be sorted anymore. Removing this redundant step
improves LiveIntervals running time by 5% on 176.gcc.

llvm-svn: 15106
This commit is contained in:
Alkis Evlogimenos 2004-07-22 15:18:10 +00:00
parent 717d6cd988
commit ba7fdf3568
1 changed files with 0 additions and 10 deletions
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10
lib/CodeGen/LiveIntervals.cpp
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@ -159,7 +159,6 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) {
}
}
intervals_.sort();
DEBUG(std::cerr << "********** INTERVALS **********\n");
DEBUG(std::copy(intervals_.begin(), intervals_.end(),
std::ostream_iterator<LiveInterval>(std::cerr, "\n")));
@ -263,15 +262,6 @@ std::vector<LiveInterval*> LiveIntervals::addIntervalsForSpills(
}
}
// FIXME: This method MUST return intervals in sorted order. If a
// particular machine instruction both uses and defines the vreg being
// spilled (e.g., vr = vr + 1) and if the def is processed before the
// use, the list ends up not sorted.
//
// The proper way to fix this is to process all uses of the vreg before we
// process any defs. However, this would require refactoring the above
// blob of code, which I'm not feeling up to right now.
std::sort(added.begin(), added.end(), less_ptr<LiveInterval>());
return added;
}