[LLVMdev] How to use a FunctionPass in a ModulePass?

[gauss]

Hi, Devang. Thank you for your reply. 

But in my case, my ModulePass requires another FunctionPass (e.g.
MemoryDependenceAnalysis) rather than the opposite direction. Is it also
limited?

-
gauss




Devang Patel-2 wrote:
> 
> On Mon, Aug 10, 2009 at 3:35 AM, gauss<gausszhch at gmail.com> wrote:
>> Hi, all:
>>
>> I wanted to use a FunctionPass (e.g. MemoryDependenceAnalysis) in a
>> ModulePass, and then I used the method
>> "getAnalysis<MemoryDependenceAnalysis>(llvm::Function *)"  described at
>> http://llvm.org/docs/WritingAnLLVMPass.html#ModulePass to get the
>> FunctionPass. But , it still crashed when I invoked this pass in tool
>> 'opt'.
>>
>> However, if I change my pass to inherit from FunctionPass, then
>> everything
>> goes well. But I must use the ModulePass to solve my problem. What can I
>> do
>> now?
> 
> As the docs say, the function pass must not require any other module
> pass (or immutable pass) here. This is a limitation of current
> implementation. I'll update docs to list "immutable pass" explicitly.
> 
> -
> Devang
> 
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