[LLVMdev] PassManager error message hard to decipher

[Chris Lattner]

> Here is the situation.  We have 5 passes, RegisterAllocator,
> FunctionLiveVarInfo, CoalesceCopies, DominanceForest, and UnionSSAVars,
> with dependencies as follows:

Wow, that is a crazy set of interdependences, I'm impressed :)

> class RegisterAllocator : public FunctionPass {
>   virtual void getAnalysisUsage(AnalysisUsage &AU) const {
> class FunctionLiveVarInfo : public FunctionPass {
>   virtual void getAnalysisUsage(AnalysisUsage &AU) const {

These are ok...

> class CoalesceCopies : public FunctionPass {
>   virtual void getAnalysisUsage(AnalysisUsage &AU) {
> class UnionSSAVars : public FunctionPass {
>   virtual void getAnalysisUsage(AnalysisUsage &AU) {
> class DominanceForest : public FunctionPass {
>   virtual void getAnalysisUsage(AnalysisUsage &AU) {

These are not: notice the methods aren't const.  Let me know whether or
not this fixes the problem, you probably have the most complex web of
interdependences yet :)

-Chris

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