[Bug c/40312] Compiling with O2 flag lead to wrong binary code (X86 system 32bit)

[tlin at a10networks dot com]

------- Comment #1 from tlin at a10networks dot com  2009-05-30 23:08 -------
The one compiled with O2 has wrong binary code.

The problem occurs when GCC compiles the following lines with O2 flag.

"
        if (pdw && memcmp(a1, a2, pdw << 2))
                return 0;
"

In the binary code, pdw is not shifted left by 2, which leads to wrong result.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40312