source_filename = "runtime/runtime.ll"

declare void @runtime.initAll()
declare void @main.main()
declare i8* @main.main$async(i8*)
declare void @runtime.scheduler(i8*)

; Will be changed to true if there are 'go' statements in the compiled program.
@has_scheduler = private unnamed_addr constant i1 false

define i32 @main() {
    call void @runtime.initAll()
    %has_scheduler = load i1, i1* @has_scheduler
    ; This branch will be optimized away. Only one of the targets will remain.
    br i1 %has_scheduler, label %with_scheduler, label %without_scheduler

with_scheduler:
    ; Initialize main and run the scheduler.
    %main = call i8* @main.main$async(i8* null)
    call void @runtime.scheduler(i8* %main)
    ret i32 0

without_scheduler:
    ; No scheduler is necessary. Call main directly.
    call void @main.main()
    ret i32 0
}