; 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 @RTCHourModeSet(i32 noundef %0, i32 noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store volatile i32 0, ptr %5, align 4, !tbaa !5
  %6 = call i32 @RtcVersionGet()
  %7 = icmp eq i32 1, %6
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  store volatile i32 128, ptr %5, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %8, %2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  switch i32 %10, label %21 [
    i32 8, label %11
    i32 0, label %20
  ]

11:                                               ; preds = %9
  %12 = load volatile i32, ptr %5, align 4, !tbaa !5
  %13 = or i32 8, %12
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = add i32 %14, 64
  %16 = zext i32 %15 to i64
  %17 = inttoptr i64 %16 to ptr
  %18 = load volatile i32, ptr %17, align 4, !tbaa !5
  %19 = or i32 %18, %13
  store volatile i32 %19, ptr %17, align 4, !tbaa !5
  br label %30

20:                                               ; preds = %9
  br label %21

21:                                               ; preds = %20, %9
  %22 = load volatile i32, ptr %5, align 4, !tbaa !5
  %23 = or i32 0, %22
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = add i32 %24, 64
  %26 = zext i32 %25 to i64
  %27 = inttoptr i64 %26 to ptr
  %28 = load volatile i32, ptr %27, align 4, !tbaa !5
  %29 = or i32 %28, %23
  store volatile i32 %29, ptr %27, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %21, %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #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"}


; 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 @RTCHourModeSet(i32 noundef %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3)
  store volatile i32 0, ptr %3, align 4, !tbaa !5
  %4 = tail call i32 @RtcVersionGet() #3
  %5 = icmp eq i32 %4, 1
  br i1 %5, label %6, label %7

6:                                                ; preds = %2
  store volatile i32 128, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %6, %2
  %cond = icmp eq i32 %1, 8
  %.0..0..0..0. = load volatile i32, ptr %3, align 4, !tbaa !5
  %8 = add i32 %0, 64
  %9 = zext i32 %8 to i64
  %10 = inttoptr i64 %9 to ptr
  %11 = load volatile i32, ptr %10, align 4, !tbaa !5
  %12 = or i32 %11, %.0..0..0..0.
  %13 = or i32 %.0..0..0..0., %11
  %14 = or i32 %13, 8
  %.sink = select i1 %cond, i32 %14, i32 %12
  store volatile i32 %.sink, ptr %10, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3)
  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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass