Hi all,
I'm working on an Pass that needs results from an alias analysis. More
precisely, I'd like to use the AliasSetTracker class.
I added AU.addRequired<AliasAnalysis>(); at the right place.
I know the defaut AliasAnalysis does nothing and I currently get
everything as "may" aliases. My tool is standalone and does not use
opt,
so I can't simply do something like opt -globalsmodref-aa -my_pass .
I've seen somewhere that I had to add the following code (for instance)
before running my pass :
PassRegistry &Registry = *PassRegistry::getPassRegistry();
initializeTypeBasedAliasAnalysisPass(Registry);
...
Passes.add(createTypeBasedAliasAnalysisPass());
Passes.add(MyPass);
...
Passes.run(*M);
but this doesn't solve the problem, I still get everything as
"may"
aliases :
AliasSet[0xb971940, 6] may alias, Mod/Ref Pointers: (double* %x, 8),
(i32* %k, 4), (double* %arrayidx, 8), (double* %arrayidx1, 8), (i32*
@global, 4), (i32* getelementptr inbounds (i32* @global, i32 10), 4)
What am I doing wrong ?
Julien
