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from 29401b7b458 Fortran: fix ICE and wrong code with TRANSFER and CHARACTER [...] new 671a283636d Add -Wuse-after-free [PR80532]. new 9d6a0f388eb Add -Wdangling-pointer [PR63272].

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Summary of changes: gcc/c-family/c.opt | 20 + gcc/common.opt | 8 + gcc/diagnostic-spec.c | 6 + gcc/diagnostic-spec.h | 6 +- gcc/doc/invoke.texi | 122 ++- gcc/gimple-ssa-warn-access.cc | 992 ++++++++++++++++++++- gcc/passes.def | 5 +- gcc/testsuite/c-c++-common/Wdangling-pointer-2.c | 437 +++++++++ gcc/testsuite/c-c++-common/Wdangling-pointer-3.c | 64 ++ gcc/testsuite/c-c++-common/Wdangling-pointer-4.c | 73 ++ gcc/testsuite/c-c++-common/Wdangling-pointer-5.c | 90 ++ gcc/testsuite/c-c++-common/Wdangling-pointer-6.c | 32 + gcc/testsuite/c-c++-common/Wdangling-pointer.c | 434 +++++++++ gcc/testsuite/c-c++-common/Wuse-after-free-2.c | 169 ++++ gcc/testsuite/c-c++-common/Wuse-after-free-3.c | 83 ++ gcc/testsuite/c-c++-common/Wuse-after-free-4.c | 102 +++ gcc/testsuite/c-c++-common/Wuse-after-free-5.c | 103 +++ gcc/testsuite/c-c++-common/Wuse-after-free-6.c | 105 +++ gcc/testsuite/c-c++-common/Wuse-after-free-7.c | 103 +++ gcc/testsuite/c-c++-common/Wuse-after-free.c | 167 ++++ gcc/testsuite/g++.dg/warn/Wdangling-pointer-2.C | 23 + gcc/testsuite/g++.dg/warn/Wdangling-pointer.C | 74 ++ gcc/testsuite/g++.dg/warn/Wfree-nonheap-object-6.C | 4 +- gcc/testsuite/g++.dg/warn/Wmismatched-dealloc-3.C | 70 ++ gcc/testsuite/g++.dg/warn/Wuse-after-free.C | 158 ++++ gcc/testsuite/g++.dg/warn/ref-temp1.C | 3 + gcc/testsuite/gcc.dg/Wdangling-pointer-2.c | 82 ++ gcc/testsuite/gcc.dg/Wdangling-pointer.c | 75 ++ gcc/testsuite/gcc.dg/Wmismatched-dealloc-2.c | 13 +- gcc/testsuite/gcc.dg/Wmismatched-dealloc-3.c | 5 + gcc/testsuite/gcc.dg/analyzer/file-1.c | 3 + gcc/testsuite/gcc.dg/analyzer/file-2.c | 3 + gcc/testsuite/gcc.dg/attr-alloc_size-6.c | 2 +- gcc/testsuite/gcc.dg/attr-alloc_size-7.c | 2 +- gcc/testsuite/gcc.dg/uninit-pr50476.c | 2 +- libcpp/files.c | 13 +- libiberty/regex.c | 4 + 37 files changed, 3616 insertions(+), 41 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer-2.c create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer-3.c create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer-4.c create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer-5.c create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer-6.c create mode 100644 gcc/testsuite/c-c++-common/Wdangling-pointer.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-2.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-3.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-4.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-5.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-6.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free-7.c create mode 100644 gcc/testsuite/c-c++-common/Wuse-after-free.c create mode 100644 gcc/testsuite/g++.dg/warn/Wdangling-pointer-2.C create mode 100644 gcc/testsuite/g++.dg/warn/Wdangling-pointer.C create mode 100644 gcc/testsuite/g++.dg/warn/Wmismatched-dealloc-3.C create mode 100644 gcc/testsuite/g++.dg/warn/Wuse-after-free.C create mode 100644 gcc/testsuite/gcc.dg/Wdangling-pointer-2.c create mode 100644 gcc/testsuite/gcc.dg/Wdangling-pointer.c