[LLVMdev] Pass Manager Question

[John Criswell]

Dear All,

If I have a ModulePass that requires a FunctionPass, and I include a
line like the following:

<variable> = &getAnalysis<TheFunctionPass>(*Function);

... will the PassManager blindly re-run the FunctionPass each time the
ModulePass requests it, or does it use the Pass dependency information
to re-run the FunctionPass only when necessary.

-- John T.