Expression inside an anonymous struct literal causes invalid LLVM module

[ghost]

test "repr" {

    var a: usize = 4321;
    var b: usize = 1234;

    const func = struct {
        fn func(arg: anytype) void {}
    }.func;

    func(.{ if (a < b) a else b });

}

Produces:

broken LLVM module found: Instruction does not dominate all uses!
  %6 = getelementptr inbounds %"struct:121:11", %"struct:121:11"* %1, i32 0, i32 0, !dbg !2628
  store i64 %7, i64* %6, align 8, !dbg !2629

This is a bug in the Zig compiler.thread 223064 panic: 
Unable to dump stack trace: debug info stripped

[charles-l]

This doesn't seem to blow up in the nightly build (as of 0.9.0-dev.1343+75cecef63), but it's still wrong for non-comptime booleans. E.g.

const std = @import("std");
const print = std.debug.print;
const process = std.process;

pub fn main() !void {
    var arena = std.heap.ArenaAllocator.init(std.testing.allocator);
    defer arena.deinit();

    var args = process.args();
    _ = args.skip();
    var a = try std.fmt.parseInt(u8, try args.next(&arena.allocator).?, 10);
    var b = try std.fmt.parseInt(u8, try args.next(&arena.allocator).?, 10);
    print("{} < {} {}\n", .{ a, b, if (a < b) true else false });
}

$ zig run test.zig -- 1 2
1 < 2 true
$ zig run test.zig -- 2 1
2 < 1 true

[schmee]

Just ran in to this, the booleans being wrong is still a thing as of 0.9.0-dev.1625+d3a099c14 👍

[Vexu]

Duplicate of #3882