Comparing vector with optional vector causes LLVM ERROR: Cannot emit physreg copy instruction.

[IntegratedQuantum]

Zig Version

0.11.0-dev.1913+95f6a5935

Steps to Reproduce and Observed Behavior

const std = @import("std");

pub fn main() void {
	const Vec2f = @Vector(2, f32);
	var a: ?Vec2f = .{0, 1};
	var b: Vec2f = .{0, 1};
	if(a == b) {
		std.log.info("Worked", .{});
	}
}

This code creates the following error:

$ zig run test.zig
LLVM Emit Object... LLVM ERROR: Cannot emit physreg copy instruction
Aborted (core dumped)

The first problem here is the missing zig compiler error.
Normally if a was not optional this code would cause a compiler error because vector comparisons produce bool vectors.

​

If I adapt the code to correctly @reduce the bool vector this happens:

const std = @import("std");

pub fn main() void {
	const Vec2f = @Vector(2, f32);
	var a: ?Vec2f = .{0, 1};
	var b: Vec2f = .{0, 1};
	if(@reduce(.And, a == b)) {
		std.log.info("Worked", .{});
	}
}

output:

$ zig run test.zig
test.zig:7:21: error: expected vector, found 'bool'
 if(@reduce(.And, a == b)) {
                  ~~^~~~

Expected Behavior

• The comparison of vector and optional vectors should return a vector of bool (or cause a compiler error if that feature isn't supported).
• It should not produce an llvm error.

[nektro]

related #12609