[LLVMbugs] [Bug 15507] warn about signed, unsigned arithmetic

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=15507

Matt Beaumont-Gay <matthewbg at google.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #1 from Matt Beaumont-Gay <matthewbg at google.com> ---
$ clang -Wsign-conversion -x c++ -fsyntax-only - <<EOF 
void f() {
int s = -1;
unsigned int u = 2;
signed d = u / s;
}
EOF                                                        
<stdin>:4:14: warning: implicit conversion changes signedness: 'unsigned int'
to 'int' [-Wsign-conversion]
signed d = u / s;
       ~   ~~^~~
<stdin>:4:16: warning: implicit conversion changes signedness: 'int' to
'unsigned int' [-Wsign-conversion]
signed d = u / s;
             ~ ^
2 warnings generated.

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