; LLVM IR from lfarcaro/ARINC653_ARMV7A_AM335X :: Hardware (dmtimer)

; 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"

; Function Attrs: nounwind uwtable
define dso_local void @DMTimerEnable(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = add i32 %3, 84
  %5 = zext i32 %4 to i64
  %6 = inttoptr i64 %5 to ptr
  %7 = load volatile i32, ptr %6, align 4, !tbaa !5
  %8 = and i32 %7, 4
  %9 = icmp ne i32 %8, 0
  br i1 %9, label %10, label %18

10:                                               ; preds = %1
  br label %11

11:                                               ; preds = %16, %10
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = call i32 @DMTimerWritePostedStatusGet(i32 noundef %12)
  %14 = and i32 1, %13
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %11
  br label %11, !llvm.loop !9

17:                                               ; preds = %11
  br label %18

18:                                               ; preds = %17, %1
  %19 = load i32, ptr %2, align 4, !tbaa !5
  %20 = add i32 %19, 56
  %21 = zext i32 %20 to i64
  %22 = inttoptr i64 %21 to ptr
  %23 = load volatile i32, ptr %22, align 4, !tbaa !5
  %24 = or i32 %23, 1
  store volatile i32 %24, ptr %22, align 4, !tbaa !5
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @DMTimerWritePostedStatusGet(i32 noundef) #0

attributes #0 = { 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"}


; 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"

; Function Attrs: nounwind uwtable
define dso_local void @DMTimerEnable(i32 noundef %0) local_unnamed_addr #0 {
  %2 = add i32 %0, 84
  %3 = zext i32 %2 to i64
  %4 = inttoptr i64 %3 to ptr
  %5 = load volatile i32, ptr %4, align 4, !tbaa !5
  %6 = and i32 %5, 4
  %.not = icmp eq i32 %6, 0
  br i1 %.not, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %1, %.preheader
  %7 = tail call i32 @DMTimerWritePostedStatusGet(i32 noundef %0)
  %8 = and i32 %7, 1
  %.not3 = icmp eq i32 %8, 0
  br i1 %.not3, label %.loopexit, label %.preheader, !llvm.loop !9

.loopexit:                                        ; preds = %.preheader, %1
  %9 = add i32 %0, 56
  %10 = zext i32 %9 to i64
  %11 = inttoptr i64 %10 to ptr
  %12 = load volatile i32, ptr %11, align 4, !tbaa !5
  %13 = or i32 %12, 1
  store volatile i32 %13, ptr %11, align 4, !tbaa !5
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local i32 @DMTimerWritePostedStatusGet(i32 noundef) local_unnamed_addr #0

attributes #0 = { 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"}


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