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from 7e3ce73849f c++: Extend -Wdangling-reference for std::minmax new 5c6546ca7d8 analyzer: new warning: -Wanalyzer-deref-before-check [PR99671]

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Summary of changes: gcc/analyzer/analyzer.opt | 4 + gcc/analyzer/diagnostic-manager.cc | 12 + gcc/analyzer/engine.cc | 16 ++ gcc/analyzer/exploded-graph.h | 2 + gcc/analyzer/program-state.cc | 83 +++++- gcc/analyzer/program-state.h | 6 + gcc/analyzer/region-model.cc | 9 +- gcc/analyzer/region-model.h | 11 +- gcc/analyzer/sm-malloc.cc | 314 ++++++++++++++++++++- gcc/analyzer/sm-malloc.dot | 7 + gcc/analyzer/sm.h | 31 ++ .../options-that-control-static-analysis.rst | 29 ++ .../gcc.dg/analyzer/deref-before-check-1.c | 169 +++++++++++ .../gcc.dg/analyzer/deref-before-check-2.c | 130 +++++++++ .../gcc.dg/analyzer/deref-before-check-pr77425.c | 43 +++ gcc/testsuite/gcc.dg/analyzer/malloc-1.c | 9 + gcc/tristate.h | 1 + 17 files changed, 860 insertions(+), 16 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/analyzer/deref-before-check-1.c create mode 100644 gcc/testsuite/gcc.dg/analyzer/deref-before-check-2.c create mode 100644 gcc/testsuite/gcc.dg/analyzer/deref-before-check-pr77425.c