https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60049
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
CC| |msebor at gcc dot gnu.org
Known to work| |5.3.0, 6.1.0
Blocks| |55004
Resolution|--- |FIXED
Known to fail| |4.9.3
--- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> ---
GCC 4.9.3 still accepts the code, but GCC 5 and 6 reject it (see below). Test
added in r236225. Resolving as Fixed.
$ gcc -S -std=c++11 -w xx.cpp
xx.cpp: In function ‘int main()’:
xx.cpp:3:27: error: right operand of shift expression ‘(1 << 33)’ is >= than
the precision of the left operand [-fpermissive]
constexpr int x1 = 1 << 33 ;
~~^~~~~
xx.cpp:4:27: error: right operand of shift expression ‘(1 << -1)’ is negative
[-fpermissive]
constexpr int x2 = 1 << -1 ;
~~^~~~~
xx.cpp:5:28: error: left operand of shift expression ‘(-1 << 1)’ is negative
[-fpermissive]
constexpr int x3 = -1 << 1 ;
~~~^~~~
xx.cpp:6:27: error: right operand of shift expression ‘(1 >> 33)’ is >= than
the precision of the left operand [-fpermissive]
constexpr int x4 = 1 >> 33 ;
~~^~~~~
xx.cpp:7:27: error: right operand of shift expression ‘(1 >> -1)’ is negative
[-fpermissive]
constexpr int x5 = 1 >> -1 ;
~~^~~~~
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55004
[Bug 55004] [meta-bug] constexpr issues
