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from 0501b74264e9 RISC-V: Fix rtl checking enabled failure with -msave-restore. new 731dbfc3f3b5 Handle -Wsign-conversion in conversion_warning. new c77074d05691 PR c++/40752 - useless -Wconversion with short +=.
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Summary of changes: gcc/c-family/ChangeLog | 14 +++ gcc/c-family/c-common.c | 81 ++++--------- gcc/c-family/c-common.h | 3 +- gcc/c-family/c-warn.c | 138 ++++++++++++++++++---- gcc/c-family/c.opt | 4 + gcc/doc/invoke.texi | 22 ++++ gcc/testsuite/c-c++-common/Wconversion-pr40752.c | 49 ++++++++ gcc/testsuite/c-c++-common/Wconversion-pr40752a.c | 49 ++++++++ gcc/testsuite/c-c++-common/Wsign-conversion-1.c | 13 ++ 9 files changed, 288 insertions(+), 85 deletions(-) create mode 100644 gcc/testsuite/c-c++-common/Wconversion-pr40752.c create mode 100644 gcc/testsuite/c-c++-common/Wconversion-pr40752a.c create mode 100644 gcc/testsuite/c-c++-common/Wsign-conversion-1.c