[all-commits] [llvm/llvm-project] 06c70e: DebugInfo: Remove auto return type representation ...

[David Blaikie via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 06c70e9b998ca289630ee1629ec09b6dd51b29b9
      https://github.com/llvm/llvm-project/commit/06c70e9b998ca289630ee1629ec09b6dd51b29b9
  Author: David Blaikie <dblaikie at gmail.com>
  Date:   2022-08-17 (Wed, 17 Aug 2022)

  Changed paths:
    M clang/lib/CodeGen/CGDebugInfo.cpp
    M clang/lib/CodeGen/CGDebugInfo.h
    M clang/test/CodeGenCXX/debug-info-auto-return.cpp
    R clang/test/CodeGenCXX/no_auto_return_lambda.cpp

  Log Message:
  -----------
  DebugInfo: Remove auto return type representation support

Seems this complicated lldb sufficiently for some cases that it hasn't
been worth supporting/fixing there - and it so far hasn't provided any
new use cases/value for debug info consumers, so let's remove it until
someone has a use case for it.

(side note: the original implementation of this still had a bug (I
should've caught it in review) that we still didn't produce
auto-returning function declarations in types where the function wasn't
instantiatied (that requires a fix to remove the `if
getContainedAutoType` condition in
`CGDebugInfo::CollectCXXMemberFunctions` - without that, auto returning
functions were still being handled the same as member function templates
and special member functions - never added to the member list, only
attached to the type via the declaration chain from the definition)

Further discussion about this in D123319

This reverts commit 5ff992bca208a0e37ca6338fc735aec6aa848b72: [DEBUG-INFO] Change how we handle auto return types for lambda operator() to be consistent with gcc

This reverts commit c83602fdf51b2692e3bacb06bf861f20f74e987f: [DWARF5][clang]: Added support for DebugInfo generation for auto return type for C++ member functions.

Differential Revision: https://reviews.llvm.org/D131933