; LLVM IR from koshkin-sergey/mbOS :: Device/ADI/ADuC7023/Driver (IRQ_ADUC7023)

; 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"

%struct.IRQ_MODE_INFO_s = type { i32 }
%struct.IRQ_s = type { i32, i32, i32, i32, i32, i32, i32, i32, [3 x i32], i32, i32, %struct.EXT_IRQ, i32 }
%struct.EXT_IRQ = type { i32, i32 }
%struct.FIQ_s = type { i32, i32, i32, i32, [4 x i32], i32, i32 }

@irq_mode = external hidden global %struct.IRQ_MODE_INFO_s, align 4

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

; 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 i32 @IRQ_Disable(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp sge i32 %5, 0
  br i1 %6, label %7, label %25

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 22
  br i1 %9, label %10, label %25

10:                                               ; preds = %7
  %11 = load i32, ptr %2, align 4, !tbaa !5
  %12 = zext i32 %11 to i64
  %13 = shl i64 1, %12
  %14 = trunc i64 %13 to i32
  store i32 %14, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr @irq_mode, align 4, !tbaa !9
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = and i32 %15, %16
  %18 = zext i32 %17 to i64
  %19 = icmp eq i64 %18, 0
  br i1 %19, label %20, label %22

20:                                               ; preds = %10
  %21 = load i32, ptr %4, align 4, !tbaa !5
  store volatile i32 %21, ptr getelementptr inbounds (%struct.IRQ_s, ptr inttoptr (i64 4294901760 to ptr), i32 0, i32 3), align 4, !tbaa !11
  br label %24

22:                                               ; preds = %10
  %23 = load i32, ptr %4, align 4, !tbaa !5
  store volatile i32 %23, ptr getelementptr inbounds (%struct.FIQ_s, ptr inttoptr (i64 4294902016 to ptr), i32 0, i32 3), align 4, !tbaa !14
  br label %24

24:                                               ; preds = %22, %20
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %26

25:                                               ; preds = %7, %1
  store i32 -1, ptr %3, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %25, %24
  %27 = load i32, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %27
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"IRQ_MODE_INFO_s", !6, i64 0}
!11 = !{!12, !6, i64 12}
!12 = !{!"IRQ_s", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !6, i64 16, !6, i64 20, !6, i64 24, !6, i64 28, !7, i64 32, !6, i64 44, !6, i64 48, !13, i64 52, !6, i64 60}
!13 = !{!"EXT_IRQ", !6, i64 0, !6, i64 4}
!14 = !{!15, !6, i64 12}
!15 = !{!"FIQ_s", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12, !7, i64 16, !6, i64 32, !6, i64 36}


; 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"

%struct.IRQ_MODE_INFO_s = type { i32 }

@irq_mode = external hidden local_unnamed_addr global %struct.IRQ_MODE_INFO_s, align 4

; Function Attrs: nofree norecurse nounwind uwtable
define dso_local range(i32 -1, 1) i32 @IRQ_Disable(i32 noundef %0) local_unnamed_addr #0 {
  %or.cond = icmp ult i32 %0, 22
  br i1 %or.cond, label %.sink.split, label %8

.sink.split:                                      ; preds = %1
  %2 = zext nneg i32 %0 to i64
  %3 = shl nuw nsw i64 1, %2
  %4 = trunc nuw nsw i64 %3 to i32
  %5 = load i32, ptr @irq_mode, align 4, !tbaa !5
  %6 = and i32 %5, %4
  %7 = icmp eq i32 %6, 0
  %. = select i1 %7, ptr inttoptr (i64 4294901772 to ptr), ptr inttoptr (i64 4294902028 to ptr)
  store volatile i32 %4, ptr %., align 4, !tbaa !10
  br label %8

8:                                                ; preds = %.sink.split, %1
  %.0 = phi i32 [ -1, %1 ], [ 0, %.sink.split ]
  ret i32 %.0
}

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, !7, i64 0}
!6 = !{!"IRQ_MODE_INFO_s", !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!7, !7, i64 0}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass