From 393ebae0ef7fa72d133bf901a02fcce3b5554ab7 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 7 Nov 2006 18:04:58 +0000 Subject: [PATCH] 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 --- lib/CodeGen/LiveIntervalAnalysis.cpp | 19 +++++++------------ 1 file changed, 7 insertions(+), 12 deletions(-) diff --git a/lib/CodeGen/LiveIntervalAnalysis.cpp b/lib/CodeGen/LiveIntervalAnalysis.cpp index 8b534af74b3..e1cd741d7a8 100644 --- a/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -59,9 +59,6 @@ namespace { EnableJoining("join-liveintervals", cl::desc("Coallesce copies (default=true)"), cl::init(true)); - static cl::opt - EnableReweight("enable-majik-f00"); - } void LiveIntervals::getAnalysisUsage(AnalysisUsage &AU) const { @@ -221,16 +218,14 @@ bool LiveIntervals::runOnMachineFunction(MachineFunction &fn) { 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; } }