This is an update of the patch series at https://gcc.gnu.org/pipermail/gcc-patches/2023-July/623375.html
Changes since v3: - Use void_node in values map to indicate out-of-lifetime instead of a separate hash set - Remove tracking of temporaries for loops and calls - Fix missed checks for uses of empty classes outside lifetime and associated test - Add reference to PR c++/110619 for the second patch, and corresponding new test case Bootstrapped and regtested on x86_64-pc-linux-gnu. Nathaniel Shead (3): c++: Track lifetimes in constant evaluation [PR70331,PR96630,PR98675] c++: Improve constexpr error for dangling local variables [PR110619] c++: Improve location information in constant evaluation gcc/cp/constexpr.cc | 178 +++++++++++++----- 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-70323.C | 8 +- gcc/testsuite/g++.dg/cpp0x/constexpr-70323a.C | 8 +- .../g++.dg/cpp0x/constexpr-delete2.C | 5 +- gcc/testsuite/g++.dg/cpp0x/constexpr-diag3.C | 2 +- gcc/testsuite/g++.dg/cpp0x/constexpr-ice20.C | 1 + .../g++.dg/cpp0x/constexpr-recursion.C | 6 +- gcc/testsuite/g++.dg/cpp0x/overflow1.C | 2 +- gcc/testsuite/g++.dg/cpp1y/constexpr-110619.C | 10 + gcc/testsuite/g++.dg/cpp1y/constexpr-89285.C | 5 +- 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 ++ .../g++.dg/cpp1y/constexpr-lifetime6.C | 15 ++ .../g++.dg/cpp1y/constexpr-tracking-const14.C | 3 +- .../g++.dg/cpp1y/constexpr-tracking-const16.C | 3 +- .../g++.dg/cpp1y/constexpr-tracking-const18.C | 4 +- .../g++.dg/cpp1y/constexpr-tracking-const19.C | 4 +- .../g++.dg/cpp1y/constexpr-tracking-const21.C | 4 +- .../g++.dg/cpp1y/constexpr-tracking-const22.C | 4 +- .../g++.dg/cpp1y/constexpr-tracking-const3.C | 3 +- .../g++.dg/cpp1y/constexpr-tracking-const4.C | 3 +- .../g++.dg/cpp1y/constexpr-tracking-const7.C | 3 +- gcc/testsuite/g++.dg/cpp1y/constexpr-union5.C | 4 +- gcc/testsuite/g++.dg/cpp1y/pr68180.C | 4 +- .../g++.dg/cpp1z/constexpr-lambda6.C | 4 +- .../g++.dg/cpp1z/constexpr-lambda8.C | 5 +- 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/cpp2a/constinit10.C | 5 +- .../g++.dg/cpp2a/is-corresponding-member4.C | 4 +- 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 | 23 +-- .../g++.dg/warn/Wreturn-local-addr-6.C | 3 - .../25_algorithms/equal/constexpr_neg.cc | 7 +- .../testsuite/26_numerics/gcd/105844.cc | 10 +- .../testsuite/26_numerics/lcm/105844.cc | 14 +- 50 files changed, 350 insertions(+), 168 deletions(-) create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-110619.C 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 create mode 100644 gcc/testsuite/g++.dg/cpp1y/constexpr-lifetime6.C -- 2.41.0
