; LLVM IR from lfarcaro/ARINC653_ARMV7A_AM335X :: ARINC653_PORT (timer_delay)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare void @DMTimerEnable(i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @TIMER_DELAY_MS(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %11, %1
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %6, label %14

6:                                                ; preds = %3
  call void @DMTimerCounterSet(i32 noundef 1208262656, i32 noundef 0)
  call void @DMTimerEnable(i32 noundef 1208262656)
  br label %7

7:                                                ; preds = %10, %6
  %8 = call i32 @DMTimerCounterGet(i32 noundef 1208262656)
  %9 = icmp ult i32 %8, 24000
  br i1 %9, label %10, label %11

10:                                               ; preds = %7
  br label %7, !llvm.loop !9

11:                                               ; preds = %7
  call void @DMTimerDisable(i32 noundef 1208262656)
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = add i32 %12, -1
  store i32 %13, ptr %2, align 4, !tbaa !5
  br label %3, !llvm.loop !11

14:                                               ; preds = %3
  ret void
}

declare void @DMTimerCounterSet(i32 noundef, i32 noundef) #0

declare i32 @DMTimerCounterGet(i32 noundef) #0

declare void @DMTimerDisable(i32 noundef) #0

attributes #0 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare void @DMTimerEnable(i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @TIMER_DELAY_MS(i32 noundef %0) local_unnamed_addr #1 {
  %.not2 = icmp eq i32 %0, 0
  br i1 %.not2, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %5
  %.03 = phi i32 [ %6, %5 ], [ %0, %1 ]
  tail call void @DMTimerCounterSet(i32 noundef 1208262656, i32 noundef 0) #2
  tail call void @DMTimerEnable(i32 noundef 1208262656) #2
  br label %2

2:                                                ; preds = %2, %.lr.ph
  %3 = tail call i32 @DMTimerCounterGet(i32 noundef 1208262656) #2
  %4 = icmp ult i32 %3, 24000
  br i1 %4, label %2, label %5, !llvm.loop !5

5:                                                ; preds = %2
  tail call void @DMTimerDisable(i32 noundef 1208262656) #2
  %6 = add i32 %.03, -1
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !7

._crit_edge:                                      ; preds = %5, %1
  ret void
}

declare void @DMTimerCounterSet(i32 noundef, i32 noundef) local_unnamed_addr #0

declare i32 @DMTimerCounterGet(i32 noundef) local_unnamed_addr #0

declare void @DMTimerDisable(i32 noundef) local_unnamed_addr #0

attributes #0 = { "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass