; 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 }

@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_SetMode(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 0
  br i1 %9, label %13, label %10

10:                                               ; preds = %2
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = icmp sge i32 %11, 22
  br i1 %12, label %13, label %14

13:                                               ; preds = %10, %2
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %32

14:                                               ; preds = %10
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = zext i32 %15 to i64
  %17 = shl i64 1, %16
  %18 = trunc i64 %17 to i32
  store i32 %18, ptr %6, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = zext i32 %19 to i64
  %21 = and i64 %20, 8
  switch i64 %21, label %31 [
    i64 0, label %22
    i64 8, label %27
  ]

22:                                               ; preds = %14
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = xor i32 %23, -1
  %25 = load i32, ptr @irq_mode, align 4, !tbaa !9
  %26 = and i32 %25, %24
  store i32 %26, ptr @irq_mode, align 4, !tbaa !9
  br label %31

27:                                               ; preds = %14
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = load i32, ptr @irq_mode, align 4, !tbaa !9
  %30 = or i32 %29, %28
  store i32 %30, ptr @irq_mode, align 4, !tbaa !9
  br label %31

31:                                               ; preds = %27, %22, %14
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %32

32:                                               ; preds = %31, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %33 = load i32, ptr %3, align 4
  ret i32 %33
}

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}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local range(i32 -1, 1) i32 @IRQ_SetMode(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %or.cond = icmp ugt i32 %0, 21
  br i1 %or.cond, label %16, label %3

3:                                                ; preds = %2
  %4 = zext nneg i32 %0 to i64
  %5 = shl nuw nsw i64 1, %4
  %6 = trunc nuw nsw i64 %5 to i32
  %7 = and i32 %1, 8
  %switch = icmp eq i32 %7, 0
  br i1 %switch, label %8, label %12

8:                                                ; preds = %3
  %9 = xor i32 %6, -1
  %10 = load i32, ptr @irq_mode, align 4, !tbaa !5
  %11 = and i32 %10, %9
  br label %15

12:                                               ; preds = %3
  %13 = load i32, ptr @irq_mode, align 4, !tbaa !5
  %14 = or i32 %13, %6
  br label %15

15:                                               ; preds = %12, %8
  %storemerge = phi i32 [ %14, %12 ], [ %11, %8 ]
  store i32 %storemerge, ptr @irq_mode, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %2, %15
  %.0 = phi i32 [ 0, %15 ], [ -1, %2 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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"}


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