Changes in directory llvm/lib/CodeGen:
LiveIntervalAnalysis.cpp updated: 1.191 -> 1.192
---
Log message:
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.
---
Diffs of the changes: (+7 -12)
LiveIntervalAnalysis.cpp | 19 +++++++------------
1 files changed, 7 insertions(+), 12 deletions(-)
Index: llvm/lib/CodeGen/LiveIntervalAnalysis.cpp
diff -u llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.191
llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.192
--- llvm/lib/CodeGen/LiveIntervalAnalysis.cpp:1.191 Tue Nov 7 06:25:45 2006
+++ llvm/lib/CodeGen/LiveIntervalAnalysis.cpp Tue Nov 7 12:04:58 2006
@@ -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;
}
}
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