spacemit_x60 compilation bug

[jedisct1]

Zig Version

0.16.0-dev.1245+2e8f8afc8

Steps to Reproduce and Observed Behavior

const std = @import("std");

pub fn main() !void {
    std.debug.print("Hello from RISC-V!\n", .{});
}

$ zig build-exe minimal_repro.zig -target riscv64-linux-musl -OReleaseSafe -mcpu=baseline 
$ ./minimal_repro
Hello from RISC-V!

$ zig build-exe minimal_repro.zig -target riscv64-linux-musl -OReleaseSafe -mcpu=spacemit_x60 
$ ./minimal_repro
Hello from �����

Expected Behavior

No data corruption.

[alexrp]

Does this happen with -lc?

[jedisct1]

Same with -lc.

[alexrp]

Probably safe to say this is yet another miscompilation in LLVM.

[jedisct1]

Sigh.

[jedisct1]

Disabling the vector extensions works around it:

$ zig build-exe minimal_repro.zig -target riscv64-linux-musl -OReleaseSafe -mcpu=spacemit_x60-v && ./minimal_repro

Hello from RISC-V!