https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91708
--- Comment #19 from Richard Earnshaw <rearnsha at gcc dot gnu.org> --- (In reply to Wilco from comment #18) > (In reply to Richard Earnshaw from comment #17) > > So do we have a testcase that shows the problem on older compilers? > > Yes, the same testcase shows the same incorrect substitution in older > compilers. I tried GCC9, but the MEM to MEM change dates back much further. Right, but does it lead to wrong code? It seemed to me that the compiler loses the correct alignment internally, but the object is really still aligned so nothing harmful happens.
