https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91994
--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
lzma_sha256_update in sha256.c is miscompiled with -O3 -march=skylake.
Correct code:
L42:
...
vpshufb %ymm7, %ymm1, %ymm0
vmovdqa %ymm0, (%rsp)
leaq 64(%r13), %rdi
vpshufb %ymm7, %ymm2, %ymm0
movq %rsp, %rsi
vmovdqa %ymm0, 32(%rsp)
call transform
vmovdqa .LC0(%rip), %ymm7 <<< This is missing.
.L49:
testq %rbx, %rbx
je .L69
.L50:
...
cmpl $32, %ecx
jb .L65
