[Bug other/23572] No warning for assigning a value to a 'float' variable that overflows with option -Wextra

[qiyaoltc at cn dot ibm dot com]

------- Additional Comments From qiyaoltc at cn dot ibm dot com  2005-08-29 05:00 -------
I add suffix f to the end of float constants at line 5 and line 7, and add
option -pedantic, the output from gcc is like this:

overflow-test.c:5: warning: floating constant exceeds range of "float"
overflow-test.c:9: warning: floating constant exceeds range of "double"
overflow-test.c:13: warning: integer constant is too large for "long" type
overflow-test.c:13: warning: overflow in implicit constant conversion

It seems that gcc has checked initialization which caused overflow, but do not
check underflow, that is to say:
1 GCC does not check underflow event, at least options -pedantic does not enable
underflow check.
2 If there is some mechanism in GCC internal to check underflow and overflow,
there is a bug in gcc info about the description of -Wextra option.

Could you tell me what I could do to this problem?  Maybe, it is impossible for
me to fix it, but I just want to do something more.  Please give me some
suggestions and I will try to do it.

Thanks.

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23572