llvm-project/llvm/lib/Bitcode
Teresa Johnson 0c432b1a70 [ThinLTO] Only emit referenced type id records in index files
Summary:
Currently all type ids are emitted into the index file when it is
written. For distributed ThinLTO, that meant that all type ids were
being duplicated into every single distributed index file, regardless of
whether they were referenced, leading to huge amounts of unnecessary
duplication and size bloat.

Keep track of the type id GUIDs actually referenced by the GV summary
records being emitted, and only emit those type IDs.

Add a new test, and fix test/Assembler/thinlto-summary.ll so that all
type ids are referenced to prevent deletion in that test.

Reviewers: pcc

Subscribers: mehdi_amini, inglorion, eraman, steven_wu, dexonsmith, vitalybuka, llvm-commits

Differential Revision: https://reviews.llvm.org/D49565

llvm-svn: 337503
2018-07-19 22:25:56 +00:00
..
Reader [BitcodeReader] Infer the correct runtime preemption for GlobalValue 2018-07-09 16:52:05 +00:00
Writer [ThinLTO] Only emit referenced type id records in index files 2018-07-19 22:25:56 +00:00
CMakeLists.txt
LLVMBuild.txt