It looks like a typo. When the false value (C) is the constant -1, the
correct fold should be: R = B | ~A
Reproducer (LoongArch64 assembly):
.text
.globl _start
_start:
vldi $vr1, 3073
vldi $vr2, 1023
vbitsel.v $vr0, $vr2, $vr1, $vr2
vpickve2gr.d $a1, $vr0, 1
xori $a0, $a1, 1
li.w $a7, 93
syscall 0
Fixes: e58b977238 ("tcg/optimize: Optimize bitsel_vec")
Link: https://github.com/llvm/llvm-project/issues/159610
Signed-off-by: WANG Rui <wangrui@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20250919124901.2756538-1-wangrui@loongson.cn>
(cherry picked from commit a50347a414)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
903045d724