X10

Maintain inlining dependency graph for X10DT to enable incremental compilation

Details

  • Number of attachments :
    0

Description

Issue: Inlining (both at the X10 and the C++ level) creates cross-file dependencies.

In X10 2.2, incremental X10DT buulds with OPTIMIZE enabled are inherently incorrect.

The compiler needs to provide X10DT with a dependency list as part of compilation and X10DT needs to process this when deciding what to recompile when a source file is changed.

Activity

Ascending order - Click to sort in descending order
Hide
Permalink
Igor Peshansky added a comment -

Bowen and I discussed this a while ago. What is needed is a change in the Position API in the frontend to allow storing outer positions. The inliner then needs to use this API to record inlining chains. The X10DT builder would have to analyze the ASTs just before code generation and traverse these position chains to find all dependencies.

I don't see a way to track C++-level inlining dependencies, unless we build in special knowledge about the post-compiler into the C++ code generator.

Show
Igor Peshansky added a comment - Bowen and I discussed this a while ago. What is needed is a change in the Position API in the frontend to allow storing outer positions. The inliner then needs to use this API to record inlining chains. The X10DT builder would have to analyze the ASTs just before code generation and traverse these position chains to find all dependencies. I don't see a way to track C++-level inlining dependencies, unless we build in special knowledge about the post-compiler into the C++ code generator.
Hide
Permalink
David Grove added a comment -

coarse tracking of C++ level inlining is possible via the following: C++ can only inline statically resolved calls. When codegen hits a static call to a method defined in another compilation unit, conservatively assume it is inlined.

Show
David Grove added a comment - coarse tracking of C++ level inlining is possible via the following: C++ can only inline statically resolved calls. When codegen hits a static call to a method defined in another compilation unit, conservatively assume it is inlined.

People

  • Assignee:
    Unassigned
    Reporter:
    David Grove
Vote (0)
Watch (2)

Dates

  • Created:
    Updated: