commit a50347a4145faf6d409afd4b9b682c8b3e60854a
author WANG Rui <wangrui@loongson.cn> Fri Sep 19 20:49:01 2025 +0800
committer Richard Henderson <richard.henderson@linaro.org> Tue Sep 23 16:53:38 2025 -0700
tree ec1dec265b0f9e02136376086c485d3f49afcc93
parent 76d2b8d42adb0db2d1ccd08a626f25ddd30208a8

tcg/optimize: Fix folding of vector bitsel

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: e58b977238e3 ("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>