http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55247
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> 2012-11-10 19:11:03 UTC --- (In reply to comment #12) > (In reply to comment #11) > > ~/gcc-build/gcc/cc1 -O2 -mx32 -maddress-mode=long pr55247.c > > > > results in following sequence: > > > > movdqu (%eax), %xmm0 > > movdqa %xmm0, (%rsp) > > movq (%rsp), %rax > > movq 8(%rsp), %rdx > > movq %rax, 16(%rsp) > > movq %rdx, 24(%rsp) > > > > while -maddress=mode=short produces expected code: > > > > movq 8(%eax), %rdx > > movq (%eax), %rax > > movq %rdx, 8(%esp) > > movq %rax, (%esp) > > This is related to PR 55259. This patch: > > http://gcc.gnu.org/ml/gcc-patches/2012-11/msg00799.html > > fixes it. With this fix, we don't need to change *movti_internal_rex64 since it generates redundant load/store.
