Enable improved spilling costs by default. This speeds up viterbi on x86
by 40%, FreeBench/fourinarow by 20%, and many other programs 10-25%.
On PPC, this speeds up fourinarow by 18%, and probably other things as well.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31504 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp
index 8b534af..e1cd741 100644
--- a/lib/CodeGen/LiveIntervalAnalysis.cpp
+++ b/lib/CodeGen/LiveIntervalAnalysis.cpp
@@ -59,9 +59,6 @@
EnableJoining("join-liveintervals",
cl::desc("Coallesce copies (default=true)"),
cl::init(true));
- static cl::opt<bool>
- EnableReweight("enable-majik-f00");
-
}
void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const {
@@ -221,16 +218,14 @@
if (isZeroLengthInterval(&LI))
LI.weight = HUGE_VALF;
- if (EnableReweight) {
- // Divide the weight of the interval by its size. This encourages
- // spilling of intervals that are large and have few uses, and
- // discourages spilling of small intervals with many uses.
- unsigned Size = 0;
- for (LiveInterval::iterator II = LI.begin(), E = LI.end(); II != E;++II)
- Size += II->end - II->start;
+ // Divide the weight of the interval by its size. This encourages
+ // spilling of intervals that are large and have few uses, and
+ // discourages spilling of small intervals with many uses.
+ unsigned Size = 0;
+ for (LiveInterval::iterator II = LI.begin(), E = LI.end(); II != E;++II)
+ Size += II->end - II->start;
- LI.weight /= Size;
- }
+ LI.weight /= Size;
}
}