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

; 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 @DMTimer6ModuleClkConfig() #0 {
  %1 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %2 = and i32 %1, -4
  store volatile i32 %2, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %3 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %4 = or i32 %3, 1
  store volatile i32 %4, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  br label %5

5:                                                ; preds = %9, %0
  %6 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %7 = and i32 %6, 3
  %8 = icmp ne i32 %7, 1
  br i1 %8, label %9, label %10

9:                                                ; preds = %5
  br label %5, !llvm.loop !9

10:                                               ; preds = %5
  %11 = load volatile i32, ptr inttoptr (i64 1155530992 to ptr), align 4, !tbaa !5
  %12 = or i32 %11, 2
  store volatile i32 %12, ptr inttoptr (i64 1155530992 to ptr), align 4, !tbaa !5
  br label %13

13:                                               ; preds = %17, %10
  %14 = load volatile i32, ptr inttoptr (i64 1155530992 to ptr), align 4, !tbaa !5
  %15 = and i32 %14, 3
  %16 = icmp ne i32 %15, 2
  br i1 %16, label %17, label %18

17:                                               ; preds = %13
  br label %13, !llvm.loop !11

18:                                               ; preds = %13
  br label %19

19:                                               ; preds = %24, %18
  %20 = load volatile i32, ptr inttoptr (i64 1155530752 to ptr), align 4, !tbaa !5
  %21 = and i32 %20, 268435712
  %22 = icmp ne i32 %21, 0
  %23 = xor i1 %22, true
  br i1 %23, label %24, label %25

24:                                               ; preds = %19
  br label %19, !llvm.loop !12

25:                                               ; preds = %19
  ret void
}

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"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !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"

; Function Attrs: nofree norecurse nounwind uwtable
define dso_local void @DMTimer6ModuleClkConfig() local_unnamed_addr #0 {
  %1 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %2 = and i32 %1, -4
  store volatile i32 %2, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %3 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %4 = or i32 %3, 1
  store volatile i32 %4, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  br label %5

5:                                                ; preds = %5, %0
  %6 = load volatile i32, ptr inttoptr (i64 1155532060 to ptr), align 4, !tbaa !5
  %7 = and i32 %6, 3
  %.not = icmp eq i32 %7, 1
  br i1 %.not, label %8, label %5, !llvm.loop !9

8:                                                ; preds = %5
  %9 = load volatile i32, ptr inttoptr (i64 1155530992 to ptr), align 16, !tbaa !5
  %10 = or i32 %9, 2
  store volatile i32 %10, ptr inttoptr (i64 1155530992 to ptr), align 16, !tbaa !5
  br label %11

11:                                               ; preds = %11, %8
  %12 = load volatile i32, ptr inttoptr (i64 1155530992 to ptr), align 16, !tbaa !5
  %13 = and i32 %12, 3
  %.not1 = icmp eq i32 %13, 2
  br i1 %.not1, label %.preheader, label %11, !llvm.loop !11

.preheader:                                       ; preds = %11, %.preheader
  %14 = load volatile i32, ptr inttoptr (i64 1155530752 to ptr), align 2097152, !tbaa !5
  %15 = and i32 %14, 268435712
  %.not2 = icmp eq i32 %15, 0
  br i1 %.not2, label %.preheader, label %16, !llvm.loop !12

16:                                               ; preds = %.preheader
  ret void
}

attributes #0 = { nofree norecurse 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}
!12 = distinct !{!12, !10}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InstCombinePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SimplifyCFGPass