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'graph' is spelled without a 'c'.

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Also added Statistic counters for NoAlias and MayAlias.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4972 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Misha Brukman 2002-12-12 05:34:10 +00:00
parent c2799163e2
commit f4445dfcb7
1 changed files with 12 additions and 3 deletions
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15
lib/Analysis/DataStructure/Steensgaard.cpp
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@ -13,6 +13,11 @@
#include "llvm/Module.h"
#include "Support/Statistic.h"
namespace {
Statistic<> NumNoAlias ("steens", "Number of 'no alias' replies");
Statistic<> NumMayAlias ("steens", "Number of 'may alias' replies");
};
namespace {
class Steens : public Pass, public AliasAnalysis {
DSGraph *ResultGraph;
@ -202,7 +207,7 @@ bool Steens::run(Module &M) {
// alias - This is the only method here that does anything interesting...
AliasAnalysis::Result Steens::alias(const Value *V1, const Value *V2) {
assert(ResultGraph && "Result grcaph has not yet been computed!");
assert(ResultGraph && "Result graph has not been computed yet!");
std::map<Value*, DSNodeHandle> &GVM = ResultGraph->getScalarMap();
@ -214,9 +219,10 @@ AliasAnalysis::Result Steens::alias(const Value *V1, const Value *V2) {
DSNodeHandle &V2H = J->second;
// If the two pointers point to different data structure graph nodes, they
// cannot alias!
if (V1H.getNode() != V2H.getNode())
if (V1H.getNode() != V2H.getNode()) {
++NumNoAlias;
return NoAlias;
}
// FIXME: If the two pointers point to the same node, and the offsets are
// different, and the LinkIndex vector doesn't alias the section, then the
// two pointers do not alias. We need access size information for the two
@ -225,6 +231,9 @@ AliasAnalysis::Result Steens::alias(const Value *V1, const Value *V2) {
}
}
// Since Steensgaard cannot do any better, count it as a 'may alias'
++NumMayAlias;
// If we cannot determine alias properties based on our graph, fall back on
// some other AA implementation.
//