LoongArch: BPF: Remove redundant zext jumping in move_imm()

In move_imm(), when an immediate hits the 12-bit unsigned range, an
`ori rd, $zero, imm` instruction is emitted.

According to the manual, the `ori` instruction inherently performs a
logical or with zero-extended immediate operands against $zero, so the
upper 32 bits of the destination register `rd` are already 0.

However, the existing JIT code unconditionally executes `goto zext;`
after `ori`, forcing it to fallthrough into `emit_zext_32()` to clear
the upper 32 bits for 32-bit ALU operations.

Fix this redundancy by directly returning from the function inside the
`is_unsigned_imm12()` block.

Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

0 files changed, 0 insertions, 0 deletions