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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77358 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Andreas Bolka 2009-07-28 19:49:49 +00:00
parent 34ce687144
commit 328fb3d210
1 changed files with 14 additions and 0 deletions
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14
lib/Analysis/LoopDependenceAnalysis.cpp
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@ -18,6 +18,7 @@
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "lda"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/LoopDependenceAnalysis.h"
#include "llvm/Analysis/LoopPass.h"
@ -30,6 +31,12 @@
#include "llvm/Target/TargetData.h"
using namespace llvm;
STATISTIC(NumAnswered, "Number of dependence queries answered");
STATISTIC(NumAnalysed, "Number of distinct dependence pairs analysed");
STATISTIC(NumDependent, "Number of pairs with dependent accesses");
STATISTIC(NumIndependent, "Number of pairs with independent accesses");
STATISTIC(NumUnknown, "Number of pairs with unknown accesses");
LoopPass *llvm::createLoopDependenceAnalysisPass() {
return new LoopDependenceAnalysis();
}
@ -148,11 +155,18 @@ void LoopDependenceAnalysis::analysePair(DependencePair *P) const {
bool LoopDependenceAnalysis::depends(Value *A, Value *B) {
assert(isDependencePair(A, B) && "Values form no dependence pair!");
++NumAnswered;
DependencePair *p;
if (!findOrInsertDependencePair(A, B, p)) {
// The pair is not cached, so analyse it.
++NumAnalysed;
analysePair(p);
switch (p->Result) {
case Dependent: ++NumDependent; break;
case Independent: ++NumIndependent; break;
case Unknown: ++NumUnknown; break;
}
}
return p->Result != Independent;
}