[all-commits] [llvm/llvm-project] 48e182: [Diagnostics] Fix inconsistent shift-overflow warn...

[Shivam Gupta via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 48e1829874df15fd57e731d4824604f28e177585
      https://github.com/llvm/llvm-project/commit/48e1829874df15fd57e731d4824604f28e177585
  Author: Shivam Gupta <shivam98.tkg at gmail.com>
  Date:   2022-06-14 (Tue, 14 Jun 2022)

  Changed paths:
    M clang/docs/ReleaseNotes.rst
    M clang/lib/Sema/SemaExpr.cpp
    M clang/test/CXX/expr/expr.const/p2-0x.cpp
    M clang/test/SemaCXX/constant-expression-cxx2a.cpp
    M clang/test/SemaCXX/shift.cpp

  Log Message:
  -----------
  [Diagnostics] Fix inconsistent shift-overflow warnings in C++20

This fixes https://github.com/llvm/llvm-project/issues/52873.
Don't warn in C++2A mode (and newer), as signed left shifts
always wrap and never overflow. Ref. -
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2018/p1236r1.html.