https://bugs.llvm.org/show_bug.cgi?id=47295
Bug ID: 47295
Summary: Invalid error on long long literal
-9223372036854775808LL as a long long array value
Product: clang
Version: 6.0
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: C++
Assignee: unassignedclangb...@nondot.org
Reporter: francis.andre.kampb...@orange.fr
CC: blitzrak...@gmail.com, dgre...@apple.com,
erik.pilking...@gmail.com, llvm-bugs@lists.llvm.org,
richard-l...@metafoo.co.uk
Hello
Compiling the sample below;
static const long long jjlonglong = -9223372036854775808LL;
static const long long jjlonglong1 = 0xFFFFFFFFFFFFFFFF;
static const long long jjCharData[][41] = {
{2LL, 1LL, -9223372036854775808LL}
};
int main() {
return 0;
}
Clang is producing those messages
x.cpp:2:38: warning: integer literal is too large to be represented in a signed
integer type, interpreting as unsigned [-Wimplicitly-unsigned-literal]
static const long long jjlonglong = -9223372036854775808LL;
^
x.cpp:6:14: warning: integer literal is too large to be represented in a signed
integer type, interpreting as unsigned [-Wimplicitly-unsigned-literal]
{2LL, 1LL, -9223372036854775808LL}
^
x.cpp:6:13: error: constant expression evaluates to 9223372036854775808 which
cannot be narrowed to type 'long long' [-Wc++11-narrowing]
{2LL, 1LL, -9223372036854775808LL}
^~~~~~~~~~~~~~~~~~~~~~
x.cpp:6:13: note: insert an explicit cast to silence this issue
{2LL, 1LL, -9223372036854775808LL}
^~~~~~~~~~~~~~~~~~~~~~
static_cast<long long>( )
The same long long literal as -9223372036854775808LL should produce the same
warning, be used as initializer of a simple variable or a long long array
member.
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