https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111720
--- Comment #13 from JuzheZhong <juzhe.zhong at rivai dot ai> --- Confirm ARM SVE has the same issue: https://godbolt.org/z/TjcaM6xsP #include<arm_sve.h> void fn(uint8_t * __restrict out) { uint8_t arr[32] = {1, 2, 7, 1, 3, 4, 5, 3, 1, 0, 1, 2, 4, 4, 9, 9, 1, 2, 7, 1, 3, 4, 5, 3, 1, 0, 1, 2, 4, 4, 9, 9}; uint8_t m = 1; svint8_t varr = *(svint8_t*)arr; *(svint8_t*)out = varr; } ARM GCC: fn: adrp x1, .LANCHOR0 add x1, x1, :lo12:.LANCHOR0 sub sp, sp, #32 ptrue p7.b, all ldp q31, q30, [x1] -----> redundant stack spillings. stp q31, q30, [sp] -----> redundant stack spillings. ld1b z31.b, p7/z, [sp] st1b z31.b, p7, [x0] add sp, sp, 32 ret ARM clang: fn: // @fn ptrue p0.b adrp x8, .L__const.fn.arr add x8, x8, :lo12:.L__const.fn.arr ld1b { z0.b }, p0/z, [x8] st1b { z0.b }, p0, [x0] ret Hi, Richard. Could you comment this issue ? Thanks.
