[PATCH] D97405: [Remarks] Emit remarks for "auto-init" !annotations

[Francis Visoiu Mistrih via Phabricator via llvm-commits]

thegameg created this revision.
thegameg added reviewers: fhahn, paquette, jdoerfert.
Herald added subscribers: jfb, hiraditya.
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Using the `!annotation` metadata, emit remarks pointing to code added by `-ftrivial-auto-var-init` that survived the optimizer.

Example:

  auto-init.c:4:7: remark: Initialization inserted by -ftrivial-auto-var-init. [-Rpass-missed=annotation-remarks]
    int buf[1024];
        ^

The tests are testing various situations like calls/stores/other instructions, with debug locations, and extra debug information on purpose: more patches will come to improve the reporting to make it more user-friendly, and these tests will show how the reporting evolves.


https://reviews.llvm.org/D97405

Files:
  llvm/lib/Transforms/Scalar/AnnotationRemarks.cpp
  llvm/test/Transforms/Util/trivial-auto-var-init-call.ll
  llvm/test/Transforms/Util/trivial-auto-var-init-store.ll
  llvm/test/Transforms/Util/trivial-auto-var-init-unknown.ll

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