http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47409
--- Comment #9 from John Regehr <regehr at cs dot utah.edu> 2013-01-30 04:36:01
UTC ---
Just wanted to ping about this one; it's still there in tonight's GCC.
regehr@home:~$ cat vol.c
struct s2 {
volatile int x;
};
struct s2 s;
void foo (void) {
s = s;
}
regehr@home:~$ gcc -O0 vol.c -c
regehr@home:~$ objdump -d vol.o
vol.o: file format elf64-x86-64
Disassembly of section .text:
0000000000000000 <foo>:
0: 55 push %rbp
1: 48 89 e5 mov %rsp,%rbp
4: 5d pop %rbp
5: c3 retq
regehr@home:~$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/regehr/z/compiler-install/gcc-r195565-install/libexec/gcc/x86_64-unknown-linux-gnu/4.8.0/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: /home/regehr/z/compiler-source/gcc/configure
--with-libelf=/usr/local --enable-lto
--prefix=/home/regehr/z/compiler-install/gcc-r195565-install
--enable-languages=c,c++
Thread model: posix
gcc version 4.8.0 20130129 (experimental) (GCC)
