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from da3f2a56164 lra: Check for null lowpart_subregs [PR120733] new e33409a8325 Extend nonnull_if_nonzero attribute [PR120520]

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Summary of changes: gcc/analyzer/sm-malloc.cc | 16 +- gcc/builtin-attrs.def | 14 ++ gcc/builtins.cc | 8 +- gcc/builtins.def | 4 +- gcc/c-family/c-attribs.cc | 13 +- gcc/c-family/c-common.cc | 40 +++-- gcc/doc/extend.texi | 22 ++- gcc/gimple-range-infer.cc | 26 +++- gcc/gimple.cc | 35 +++-- gcc/gimple.h | 3 +- gcc/testsuite/c-c++-common/ubsan/nonnull-8.c | 32 ++++ gcc/testsuite/c-c++-common/ubsan/nonnull-9.c | 41 ++++++ gcc/testsuite/gcc.dg/nonnull-12.c | 73 ++++++++++ gcc/testsuite/gcc.dg/nonnull-13.c | 210 +++++++++++++++++++++++++++ gcc/testsuite/gcc.dg/nonnull-14.c | 23 +++ gcc/testsuite/gcc.dg/nonnull-9.c | 36 +++-- gcc/tree-ssa-ccp.cc | 42 +++++- gcc/ubsan.cc | 25 +++- 18 files changed, 605 insertions(+), 58 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/ubsan/nonnull-8.c create mode 100644 gcc/testsuite/c-c++-common/ubsan/nonnull-9.c create mode 100644 gcc/testsuite/gcc.dg/nonnull-12.c create mode 100644 gcc/testsuite/gcc.dg/nonnull-13.c create mode 100644 gcc/testsuite/gcc.dg/nonnull-14.c