http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59976
Chengnian Sun <chengniansun at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|Spurious warning on |Spurious warning on
|converting const int |converting const int
|variable to unsigned long |variable to unsigned long
| |(Also inconsistency between
| |O0 and O1)
--- Comment #1 from Chengnian Sun <chengniansun at gmail dot com> ---
The warning is gone if I compile the program with -O1.
I also have a similar example below:
$: cat s.c
unsigned g;
void fn1() {
int a;
const unsigned char b = 0;
a = b & g;
}
$: gcc-trunk -c -Wconversion -O0 s.c
s.c: In function ‘fn1’:
s.c:5:7: warning: conversion to ‘int’ from ‘unsigned int’ may change the sign
of the result [-Wsign-conversion]
a = b & g;
^
$: gcc-trunk -c -Wconversion -O1 s.c
$:
