[all-commits] [llvm/llvm-project] 8e329c: Reland "[Clang][SemaCXX] Add unused warning for va...

[Takuya Shimizu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 8e329caa944c377c51ef567d5aa67cfac9ffd0fa
      https://github.com/llvm/llvm-project/commit/8e329caa944c377c51ef567d5aa67cfac9ffd0fa
  Author: Takuya Shimizu <shimizu2486 at gmail.com>
  Date:   2023-08-15 (Tue, 15 Aug 2023)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Sema/SemaDecl.cpp
    M clang/lib/Sema/SemaExprCXX.cpp
    M clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
    M clang/test/SemaCXX/warn-unused-variables.cpp
    M llvm/lib/Support/VirtualFileSystem.cpp

  Log Message:
  -----------
  Reland "[Clang][SemaCXX] Add unused warning for variables declared in condition expressions"

This patch marks the declarations with initializations in condition expressions such as
if (int var = init) as unreferenced so that -Wunused can warn on them.

Fixes https://github.com/llvm/llvm-project/issues/61681

Reviewed By: cor3ntin
Differential Revision: https://reviews.llvm.org/D152495