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from f21f22d1baf libstdc++: Avoid overflow in ranges::advance(i, n, bound) new 00e7d024afb analyzer: show region creation events for uninit warnings

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Summary of changes: gcc/analyzer/checker-path.cc | 41 ++++++++++++ gcc/analyzer/checker-path.h | 21 ++++++ gcc/analyzer/diagnostic-manager.cc | 74 +++++++++++++++++++++- gcc/analyzer/diagnostic-manager.h | 3 +- gcc/analyzer/pending-diagnostic.cc | 32 ++++++++++ gcc/analyzer/pending-diagnostic.h | 24 +++++++ gcc/analyzer/region-model.cc | 43 +++++++++++-- gcc/analyzer/region-model.h | 1 + gcc/analyzer/region.h | 1 + gcc/testsuite/gcc.dg/analyzer/data-model-1.c | 12 ++-- gcc/testsuite/gcc.dg/analyzer/malloc-1.c | 4 +- .../gcc.dg/analyzer/memset-CVE-2017-18549-1.c | 2 +- gcc/testsuite/gcc.dg/analyzer/pr101547.c | 2 +- gcc/testsuite/gcc.dg/analyzer/pr101875.c | 2 +- gcc/testsuite/gcc.dg/analyzer/pr101962.c | 2 +- gcc/testsuite/gcc.dg/analyzer/pr104224.c | 8 +-- gcc/testsuite/gcc.dg/analyzer/pr94047.c | 2 +- gcc/testsuite/gcc.dg/analyzer/symbolic-1.c | 2 +- gcc/testsuite/gcc.dg/analyzer/uninit-1.c | 10 +-- gcc/testsuite/gcc.dg/analyzer/uninit-4.c | 2 +- gcc/testsuite/gcc.dg/analyzer/uninit-alloca.c | 7 ++ gcc/testsuite/gcc.dg/analyzer/uninit-pr94713.c | 2 +- gcc/testsuite/gcc.dg/analyzer/uninit-pr94714.c | 2 +- gcc/testsuite/gcc.dg/analyzer/zlib-3.c | 2 +- 24 files changed, 265 insertions(+), 36 deletions(-) create mode 100644 gcc/testsuite/gcc.dg/analyzer/uninit-alloca.c