Analysis not updated after running a CallGraphSCCPass.

[llvmbot]

Bugzilla Link	3703
Version	unspecified
OS	All
Attachments	Testcase to reproduce the problem.
Reporter	LLVM Bugzilla Contributor
CC	@lattner,@tlattner

Extended Description

The attached Hello.cpp file illustrates my problem. Replace the original Hello.cpp on the LLVM tree with that one, build and then run (assuming you are on Darwin):

$ ./Debug/bin/opt --debug-pass=Structure --load LLVMHello.dylib -mysccpass -hello -f -o t2.bc t.bc
Pass Arguments: -myanalysis -basiccg -mysccpass -hello -preverify -domtree -verify
Target Data Layout
ModulePass Manager
My Analysis
Basic CallGraph Construction
Call Graph SCC Pass Manager
My SCCPass
Hello World Pass
FunctionPass Manager
Preliminary module verification
Dominator Tree Construction
Module Verifier
Bitcode Writer
-- Done running MyAnalysis
-- Done running MySCCPass
-- Done running Hello

As you can see above, MyAnalysis is not re-run after MySCCPass, even though MySCCPass is not marking the analysis as beeing preserved. I was expecting it would be re-run so Hello can start with a valid analysis.

Thanks,
Julien

[tlattner]

Devang,

Any idea about this bug?

[llvmbot]

It is a pass manager bug, similar to 3601.

[lattner]

Bug 3601 is now fixed, is this also fixed?

[arsenm]

Old pass manager