[PATCH v2 0/3] c++: Track lifetimes in constant evaluation [PR70331, ...]

[Nathaniel Shead]

This is an update of the patch series at
https://gcc.gnu.org/pipermail/gcc-patches/2023-March/614759.html

The main change is modifying the first patch to store the "expired" flag
in the C++-specific lang_decl_base struct instead of tree_decl_common.
The second and third patches to improve diagnostic locations are
otherwise unchanged.

Bootstrapped and regression tested on x86_64 linux.

Nathaniel

---

Nathaniel Shead (3):
  c++: Track lifetimes in constant evaluation [PR70331,PR96630,PR98675]
  c++: Improve constexpr error for dangling local variables
  c++: Improve location information in constexpr evaluation

 gcc/cp/constexpr.cc                           | 152 ++++++++++++------
 gcc/cp/cp-tree.h                              |  10 +-
 gcc/cp/module.cc                              |   2 +
 gcc/cp/semantics.cc                           |   5 +-
 gcc/cp/typeck.cc                              |   5 +-
 gcc/testsuite/g++.dg/cpp0x/constexpr-48089.C  |  10 +-
 gcc/testsuite/g++.dg/cpp0x/constexpr-diag3.C  |   2 +-
 gcc/testsuite/g++.dg/cpp0x/constexpr-ice20.C  |   2 +-
 gcc/testsuite/g++.dg/cpp1y/constexpr-89481.C  |   3 +-
 .../g++.dg/cpp1y/constexpr-lifetime1.C        |  14 ++
 .../g++.dg/cpp1y/constexpr-lifetime2.C        |  20 +++
 .../g++.dg/cpp1y/constexpr-lifetime3.C        |  13 ++
 .../g++.dg/cpp1y/constexpr-lifetime4.C        |  11 ++
 .../g++.dg/cpp1y/constexpr-lifetime5.C        |  11 ++
 gcc/testsuite/g++.dg/cpp1y/constexpr-union5.C |   4 +-
 gcc/testsuite/g++.dg/cpp1y/pr68180.C          |   4 +-
 .../g++.dg/cpp1z/constexpr-lambda6.C          |   4 +-
 gcc/testsuite/g++.dg/cpp2a/bit-cast11.C       |  10 +-
 gcc/testsuite/g++.dg/cpp2a/bit-cast12.C       |  10 +-
 gcc/testsuite/g++.dg/cpp2a/bit-cast14.C       |  14 +-
 gcc/testsuite/g++.dg/cpp2a/constexpr-98122.C  |   4 +-
 .../g++.dg/cpp2a/constexpr-dynamic17.C        |   5 +-
 gcc/testsuite/g++.dg/cpp2a/constexpr-init1.C  |   5 +-
 gcc/testsuite/g++.dg/cpp2a/constexpr-new12.C  |   6 +-
 gcc/testsuite/g++.dg/cpp2a/constexpr-new3.C   |  10 +-
 gcc/testsuite/g++.dg/ext/constexpr-vla2.C     |   4 +-
 gcc/testsuite/g++.dg/ext/constexpr-vla3.C     |   4 +-
 gcc/testsuite/g++.dg/ubsan/pr63956.C          |   4 +-
 .../g++.dg/warn/Wreturn-local-addr-6.C        |   3 -
 .../25_algorithms/equal/constexpr_neg.cc      |   7 +-
 30 files changed, 246 insertions(+), 112 deletions(-)
 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime1.C
 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime2.C
 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime3.C
 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime4.C
 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime5.C

-- 
2.34.1