recent performance regression in the x86 backend on print1mil benchmark #17678
Description
print1mil.zig:
const std = @import("std");
fn print() void {
std.io.getStdOut().writeAll("hello, world!\n") catch return;
}
pub fn main() !void {
print();
print();
// ...zig build-exe print1mil.zig -fno-llvm -fno-lld -fstrip
0.12.0-dev.617+d1e39b691: 804ms
0.12.0-dev.694+937e8cb70: 919ms
0.12.0-dev.704+8e1421f19: 774ms
0.12.0-dev.706+3bd1b9e15: 855ms
0.12.0-dev.708+8470652f1: 853ms
0.12.0-dev.709+c3042cbe1: 2840ms
0.12.0-dev.714+0f1652dc6: 2670ms
0.12.0-dev.733+6734d2117: 3020ms
0.12.0-dev.772+9f0d2f941: 3030ms
0.12.0-dev.927+895c81ce7: 6770ms
0.12.0-dev.1237+b82459fa4: 6350ms
c3042cb is the first bad commit