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

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @RtcVersionGet() #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @RTCStop(i32 noundef %0) #2 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store volatile i32 0, ptr %3, align 4, !tbaa !5
  %4 = call i32 @RtcVersionGet()
  %5 = icmp eq i32 1, %4
  br i1 %5, label %6, label %7

6:                                                ; preds = %1
  store volatile i32 128, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %6, %1
  br label %8

8:                                                ; preds = %16, %7
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = add i32 %9, 68
  %11 = zext i32 %10 to i64
  %12 = inttoptr i64 %11 to ptr
  %13 = load volatile i32, ptr %12, align 4, !tbaa !5
  %14 = and i32 %13, 1
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %8
  br label %8, !llvm.loop !9

17:                                               ; preds = %8
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = add i32 %18, 64
  %20 = zext i32 %19 to i64
  %21 = inttoptr i64 %20 to ptr
  %22 = load volatile i32, ptr %21, align 4, !tbaa !5
  %23 = and i32 %22, -2
  store volatile i32 %23, ptr %21, align 4, !tbaa !5
  %24 = load volatile i32, ptr %3, align 4, !tbaa !5
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = add i32 %25, 64
  %27 = zext i32 %26 to i64
  %28 = inttoptr i64 %27 to ptr
  %29 = load volatile i32, ptr %28, align 4, !tbaa !5
  %30 = or i32 %29, %24
  store volatile i32 %30, ptr %28, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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 #3 = { 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 = !{!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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

declare i32 @RtcVersionGet() local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @RTCStop(i32 noundef %0) local_unnamed_addr #2 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2)
  store volatile i32 0, ptr %2, align 4, !tbaa !5
  %3 = tail call i32 @RtcVersionGet() #3
  %4 = icmp eq i32 %3, 1
  br i1 %4, label %5, label %6

5:                                                ; preds = %1
  store volatile i32 128, ptr %2, align 4, !tbaa !5
  br label %6

6:                                                ; preds = %5, %1
  %7 = add i32 %0, 68
  %8 = zext i32 %7 to i64
  %9 = inttoptr i64 %8 to ptr
  br label %10

10:                                               ; preds = %10, %6
  %11 = load volatile i32, ptr %9, align 4, !tbaa !5
  %12 = and i32 %11, 1
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %13, label %10, !llvm.loop !9

13:                                               ; preds = %10
  %14 = add i32 %0, 64
  %15 = zext i32 %14 to i64
  %16 = inttoptr i64 %15 to ptr
  %17 = load volatile i32, ptr %16, align 4, !tbaa !5
  %18 = and i32 %17, -2
  store volatile i32 %18, ptr %16, align 4, !tbaa !5
  %.0..0..0..0. = load volatile i32, ptr %2, align 4, !tbaa !5
  %19 = load volatile i32, ptr %16, align 4, !tbaa !5
  %20 = or i32 %19, %.0..0..0..0.
  store volatile i32 %20, ptr %16, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2)
  ret void
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 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 #3 = { 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 = !{!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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,SROAPass,SimplifyCFGPass,TailCallElimPass