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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63091 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2009-01-27 05:01:15 +00:00
parent 6a86bd71df
commit 26562de2ef
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");
@@ -78,6 +78,8 @@ namespace {
// Def2SpillMap - A map from a def instruction index to spill index.
DenseMap<unsigned, unsigned> Def2SpillMap;
unsigned NumSplits;
public:
static char ID;
PreAllocSplitting() : MachineFunctionPass(&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();
@@ -1218,5 +1221,8 @@ bool PreAllocSplitting::runOnMachineFunction(MachineFunction &MF) {
MadeChange |= removeDeadSpills(Split);
if (NumSplits)
NumTotalSplits += NumSplits;
return MadeChange;
}