[PATCH] D44311: [WebAssembly] Implement -print-gc-sections to test global GC

[Nicholas Wilson via Phabricator via llvm-commits]

ncw created this revision.
ncw added reviewers: sbc100, ruiu.
Herald added subscribers: llvm-commits, sunfish, aheejin, jgravelle-google, dschuff, jfb.

We don't have any tests for GC of globals yet. I've therefore implemented `-print-gc-sections` for globals, and extended the tests to exercise it. I've also made it follow the `--no-gc-sections` flag, so the tests are consistent.

It does require the addition of a YAML file, since user-defined globals aren't accessible from LLC at the moment. It's better to have the test in there than not!

Ultimately, I would quite like to move the global GC into MarkLive... but I'll leave that for another time!


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D44311

Files:
  test/wasm/Inputs/globals.yaml
  test/wasm/gc-sections.ll
  wasm/Driver.cpp
  wasm/InputFiles.cpp
  wasm/InputGlobal.h
  wasm/MarkLive.cpp
  wasm/Writer.cpp

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