https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98442
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to H.J. Lu from comment #2) > Please take a look at users/hjl/pieces/master branch: > > https://gitlab.com/x86-gcc/gcc/-/tree/users/hjl/pieces/master > > You may get some ideas. I got [hjl@gnu-cfl-1 gcc]$ cat /tmp/x.c char Tab[64]; void foo(int n) { for (int i= 0; i != 64; i++) Tab[i] = 0; } [hjl@gnu-cfl-1 gcc]$ ./xgcc -B./ -march=skylake -S -O2 /tmp/x.c [hjl@gnu-cfl-1 gcc]$ cat x.s .file "x.c" .text .p2align 4 .globl foo .type foo, @function foo: .LFB0: .cfi_startproc vpxor %xmm0, %xmm0, %xmm0 vmovups %ymm0, Tab(%rip) vmovups %ymm0, Tab+32(%rip) vzeroupper ret .cfi_endproc .LFE0: .size foo, .-foo .comm Tab,64,32 .ident "GCC: (GNU) 10.0.0 20190523 (experimental)" .section .note.GNU-stack,"",@progbits [hjl@gnu-cfl-1 gcc]$ This requires middle-end changes.
