llvm dev - Oct 2015 - Using AAResultsWrapperPass in ModulePass

Hi,

Did anyone faced any issues with the recent changes made for AliasAnalysis.
AliasAnalysis interface changed to AAResultsWrapperPass.
Prior was able to use AliasAnalysis in module pass, now facing error while using
AAResultsWrapperPass:

ld: /home/ashutosh/I2DPromo/llvm/include/llvm/PassAnalysisSupport.h:230:
AnalysisType& llvm::Pass::getAnalysisID(llvm::AnalysisID) const [with
AnalysisType = llvm::AAResultsWrapperPass; llvm::AnalysisID = const void*]:
Assertion `ResultPass && "getAnalysis*() called on an analysis that
was not " "'required' by pass!"' failed.
clang: error: unable to execute command: Aborted (core dumped)

AAResultsWrapperPass is a FunctionPass. Is that the reason this can't be
used in ModulePass ?

Looks like I'm missing something, can anyone help to get AliasAnalysis in
ModulePass ?

Usage:
class myclass: public ModulePass {
public:
void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.addRequired<AAResultsWrapperPass>();
    AU.setPreservesAll();
  }
}
bool  myclass::runOnModule(Module &M) {
  AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
}
INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)

Regards,
Ashutosh

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Ah, I got it. 'createLegacyPMAAResults' can help here.

Regards,
Ashutosh

From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Nema,
Ashutosh via llvm-dev
Sent: Thursday, October 08, 2015 3:42 PM
To: llvm-dev
Subject: [llvm-dev] Using AAResultsWrapperPass in ModulePass

Hi,

Did anyone faced any issues with the recent changes made for AliasAnalysis.
AliasAnalysis interface changed to AAResultsWrapperPass.
Prior was able to use AliasAnalysis in module pass, now facing error while using
AAResultsWrapperPass:

ld: /home/ashutosh/I2DPromo/llvm/include/llvm/PassAnalysisSupport.h:230:
AnalysisType& llvm::Pass::getAnalysisID(llvm::AnalysisID) const [with
AnalysisType = llvm::AAResultsWrapperPass; llvm::AnalysisID = const void*]:
Assertion `ResultPass && "getAnalysis*() called on an analysis that
was not " "'required' by pass!"' failed.
clang: error: unable to execute command: Aborted (core dumped)

AAResultsWrapperPass is a FunctionPass. Is that the reason this can't be
used in ModulePass ?

Looks like I'm missing something, can anyone help to get AliasAnalysis in
ModulePass ?

Usage:
class myclass: public ModulePass {
public:
void getAnalysisUsage(AnalysisUsage &AU) const override {
    AU.addRequired<AAResultsWrapperPass>();
    AU.setPreservesAll();
  }
}
bool  myclass::runOnModule(Module &M) {
  AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
}
INITIALIZE_PASS_DEPENDENCY(AAResultsWrapperPass)

Regards,
Ashutosh

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