; LLVM IR from gem5/gem5 :: ext/libfdt (fdt_ro)

; 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 @fdt_check_header(ptr noundef) #1

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

declare i32 @fdt_next_node(ptr noundef, i32 noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @fdt_node_check_compatible(ptr noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @fdt_node_offset_by_compatible(ptr noundef %0, i32 noundef %1, ptr noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = call i32 @fdt_check_header(ptr noundef %12)
  store i32 %13, ptr %10, align 4, !tbaa !9
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %15, label %17

15:                                               ; preds = %3
  %16 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %16, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %18

17:                                               ; preds = %3
  store i32 0, ptr %11, align 4
  br label %18

18:                                               ; preds = %17, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %19 = load i32, ptr %11, align 4
  switch i32 %19, label %52 [
    i32 0, label %20
  ]

20:                                               ; preds = %18
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = load i32, ptr %6, align 4, !tbaa !9
  %23 = call i32 @fdt_next_node(ptr noundef %21, i32 noundef %22, ptr noundef null)
  store i32 %23, ptr %8, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %46, %20
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = icmp sge i32 %25, 0
  br i1 %26, label %27, label %50

27:                                               ; preds = %24
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load i32, ptr %8, align 4, !tbaa !9
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  %31 = call i32 @fdt_node_check_compatible(ptr noundef %28, i32 noundef %29, ptr noundef %30)
  store i32 %31, ptr %9, align 4, !tbaa !9
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = icmp slt i32 %32, 0
  br i1 %33, label %34, label %39

34:                                               ; preds = %27
  %35 = load i32, ptr %9, align 4, !tbaa !9
  %36 = icmp ne i32 %35, -1
  br i1 %36, label %37, label %39

37:                                               ; preds = %34
  %38 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %38, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %52

39:                                               ; preds = %34, %27
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = icmp eq i32 %40, 0
  br i1 %41, label %42, label %44

42:                                               ; preds = %39
  %43 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %43, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %52

44:                                               ; preds = %39
  br label %45

45:                                               ; preds = %44
  br label %46

46:                                               ; preds = %45
  %47 = load ptr, ptr %5, align 8, !tbaa !5
  %48 = load i32, ptr %8, align 4, !tbaa !9
  %49 = call i32 @fdt_next_node(ptr noundef %47, i32 noundef %48, ptr noundef null)
  store i32 %49, ptr %8, align 4, !tbaa !9
  br label %24, !llvm.loop !11

50:                                               ; preds = %24
  %51 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %51, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %52

52:                                               ; preds = %50, %42, %37, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %53 = load i32, ptr %4, align 4
  ret i32 %53
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

declare i32 @fdt_check_header(ptr noundef) local_unnamed_addr #0

declare i32 @fdt_next_node(ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @fdt_node_check_compatible(ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @fdt_node_offset_by_compatible(ptr noundef %0, i32 noundef %1, ptr noundef %2) local_unnamed_addr #1 {
  %4 = tail call i32 @fdt_check_header(ptr noundef %0) #2
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %5, label %.loopexit

5:                                                ; preds = %3
  %6 = tail call i32 @fdt_next_node(ptr noundef %0, i32 noundef %1, ptr noundef null) #2
  %7 = icmp sgt i32 %6, -1
  br i1 %7, label %.lr.ph, label %.loopexit

.lr.ph:                                           ; preds = %5, %11
  %.01921 = phi i32 [ %12, %11 ], [ %6, %5 ]
  %8 = tail call i32 @fdt_node_check_compatible(ptr noundef %0, i32 noundef %.01921, ptr noundef %2)
  %or.cond = icmp slt i32 %8, -1
  br i1 %or.cond, label %.loopexit, label %9

9:                                                ; preds = %.lr.ph
  %10 = icmp eq i32 %8, 0
  br i1 %10, label %.loopexit, label %11

11:                                               ; preds = %9
  %12 = tail call i32 @fdt_next_node(ptr noundef %0, i32 noundef %.01921, ptr noundef null) #2
  %13 = icmp sgt i32 %12, -1
  br i1 %13, label %.lr.ph, label %.loopexit, !llvm.loop !5

.loopexit:                                        ; preds = %.lr.ph, %9, %11, %5, %3
  %.1 = phi i32 [ %4, %3 ], [ %6, %5 ], [ %8, %.lr.ph ], [ %.01921, %9 ], [ %12, %11 ]
  ret i32 %.1
}

attributes #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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass