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allow field sensitivity to be a tunable parameter 

llvm-svn: 26777
This commit is contained in:
Andrew Lenharth 2006-03-15 05:43:41 +00:00
parent 2e1fde7c5c
commit fb4df2055f
1 changed files with 6 additions and 2 deletions
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8
llvm/lib/Analysis/DataStructure/DataStructure.cpp
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@ -39,6 +39,10 @@ namespace {
Statistic<> NumDNE ("dsa", "Number of nodes removed by reachability");
Statistic<> NumTrivialDNE ("dsa", "Number of nodes trivially removed");
Statistic<> NumTrivialGlobalDNE("dsa", "Number of globals trivially removed");
static cl::opt<unsigned>
DSAFieldLimit("dsa-field-limit", cl::Hidden,
cl::desc("Number of fields to track before collapsing a node"),
cl::init(256));
};
#if 0
@ -468,7 +472,7 @@ bool DSNode::mergeTypeInfo(const Type *NewTy, unsigned Offset,
// collapse it. This can occur for fortran common blocks, which have stupid
// things like { [100000000 x double], [1000000 x double] }.
unsigned NumFields = (NewTySize+DS::PointerSize-1) >> DS::PointerShift;
if (NumFields > 256) {
if (NumFields > DSAFieldLimit) {
foldNodeCompletely();
return true;
}
@ -496,7 +500,7 @@ bool DSNode::mergeTypeInfo(const Type *NewTy, unsigned Offset,
// collapse it. This can occur for fortran common blocks, which have stupid
// things like { [100000000 x double], [1000000 x double] }.
unsigned NumFields = (NewTySize+Offset+DS::PointerSize-1) >> DS::PointerShift;
if (NumFields > 256) {
if (NumFields > DSAFieldLimit) {
foldNodeCompletely();
return true;
}