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Make the pre-split-limit option more useful by using a per-function counter.

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llvm-svn: 63091
This commit is contained in:
Owen Anderson 2009-01-27 05:01:15 +00:00
parent a05436f739
commit 284f6dec01
1 changed files with 7 additions and 1 deletions
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8
lib/CodeGen/PreAllocSplitting.cpp
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@ -38,7 +38,7 @@ using namespace llvm;
static cl::opt<int> PreSplitLimit("pre-split-limit", cl::init(-1), cl::Hidden);
STATISTIC(NumSplits, "Number of intervals split");
STATISTIC(NumTotalSplits, "Number of intervals split");
STATISTIC(NumRemats, "Number of intervals split by rematerialization");
STATISTIC(NumFolds, "Number of intervals split with spill folding");
STATISTIC(NumRenumbers, "Number of intervals renumbered into new registers");
@ -77,6 +77,8 @@ namespace {
// Def2SpillMap - A map from a def instruction index to spill index.
DenseMap<unsigned, unsigned> Def2SpillMap;
unsigned NumSplits;
public:
static char ID;
@ -1191,6 +1193,7 @@ bool PreAllocSplitting::runOnMachineFunction(MachineFunction &MF) {
LSs = &getAnalysis<LiveStacks>();
bool MadeChange = false;
NumSplits = 0;
// Make sure blocks are numbered in order.
MF.RenumberBlocks();
@ -1217,6 +1220,9 @@ bool PreAllocSplitting::runOnMachineFunction(MachineFunction &MF) {
}
MadeChange |= removeDeadSpills(Split);
if (NumSplits)
NumTotalSplits += NumSplits;
return MadeChange;
}