Arrays elements failing trivial comparison associated with inlined for loop #18723
Description
Zig Version
0.12.0-dev.2341+92211135f
Steps to Reproduce and Observed Behavior
Just run the exe built using zig build-exe from code bellow:
const std = @import("std");
const App = struct {
scroll_pos: [2]u32 = .{ 0, 0 },
dirty: bool = false,
fn scrollGood(self: *App, offset: [2]i32) void {
const x = self.scroll_pos[0];
const y = self.scroll_pos[1];
inline for (0..2) |i| {
if (offset[i] >= 0) {
self.scroll_pos[i] +|= @bitCast(offset[i]);
} else {
self.scroll_pos[i] -|= @bitCast(-offset[i]);
}
}
std.log.info("{any} -> {any}", .{ .{ x, y }, self.scroll_pos });
if (self.scroll_pos[0] != x or self.scroll_pos[1] != y) {
self.dirty = true;
}
}
fn scrollBad(self: *App, offset: [2]i32) void {
const o = self.scroll_pos;
inline for (0..2) |i| {
if (offset[i] >= 0) {
self.scroll_pos[i] +|= @bitCast(offset[i]);
} else {
self.scroll_pos[i] -|= @bitCast(-offset[i]);
}
}
std.log.info("{any} -> {any}", .{ o, self.scroll_pos });
if (self.scroll_pos[0] != o[0] or self.scroll_pos[1] != o[1]) {
self.dirty = true;
}
}
};
pub fn main() void {
{
var app = App{};
app.scrollGood(.{ 0, 1 });
std.log.info("{}", .{app.dirty});
}
{
var app = App{};
app.scrollBad(.{ 0, 1 });
std.log.info("{}", .{app.dirty});
}
}outputs:
info: { 0, 0 } -> { 0, 1 }
info: true
info: { 0, 0 } -> { 0, 1 }
info: false
Expected Behavior
the output of scrollGood and scrollBad should be identical
info: { 0, 0 } -> { 0, 1 }
info: true
info: { 0, 0 } -> { 0, 1 }
info: true