[PATCH] D64232: [analyzer] Prune calls to functions with linear CFGs that return a non-zero constrained value

[Kristóf Umann via Phabricator via cfe-commits]

Szelethus created this revision.
Szelethus added reviewers: NoQ, xazax.hun, rnkovacs, baloghadamsoftware, dcoughlin, Charusso.
Szelethus added a project: clang.
Herald added subscribers: cfe-commits, gamesh411, dkrupp, donat.nagy, mikhail.ramalho, a.sidorin, szepet, whisperity.

During the evaluation of D62883 <https://reviews.llvm.org/D62883>, I noticed a bunch of totally meaningless notes with the pattern of "Calling 'A'" -> "Returning value" -> "Returning from 'A'", which added no value to the report at all.

This patch (not only affecting tracked conditions mind you) prunes diagnostic messages to functions that return a value not constrained to be 0, and are also linear.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D64232

Files:
  clang/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp
  clang/test/Analysis/diagnostics/find_last_store.c
  clang/test/Analysis/track-control-dependency-conditions.cpp
  clang/test/Analysis/uninit-vals.c

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