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| author | Eli Friedman <eli.friedman@gmail.com> | 2011-10-13 22:49:56 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-10-13 22:49:56 +0000 |
| commit | 90406e18b8590d9588a76b849937d643dd3dc8b5 (patch) | |
| tree | eccf6de90468c0ce86d1f70b713d38ceabf947a0 | |
| parent | 8e4d0429de3d44a4c5b02b3d27cb0b78520609ba (diff) | |
| download | llvm-90406e18b8590d9588a76b849937d643dd3dc8b5.tar.gz llvm-90406e18b8590d9588a76b849937d643dd3dc8b5.tar.bz2 llvm-90406e18b8590d9588a76b849937d643dd3dc8b5.tar.xz | |
Avoid undefined behavior in signed integer negation. Patch by Ahmed Charles.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141905 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Support/raw_ostream.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp index c9cf249500..4927e9a7b9 100644 --- a/lib/Support/raw_ostream.cpp +++ b/lib/Support/raw_ostream.cpp @@ -121,7 +121,8 @@ raw_ostream &raw_ostream::operator<<(unsigned long N) { raw_ostream &raw_ostream::operator<<(long N) { if (N < 0) { *this << '-'; - N = -N; + // Avoid undefined behavior on LONG_MIN with a cast. + N = -(unsigned long)N; } return this->operator<<(static_cast<unsigned long>(N)); |