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

; 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.fdt_header = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }

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

; Function Attrs: nounwind uwtable
declare hidden i32 @_fdt_rw_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_num_mem_rsv(ptr noundef) #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @fdt32_to_cpu(i32 noundef) #3

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @fdt_set_totalsize(ptr noundef, i32 noundef) #3

; Function Attrs: nounwind uwtable
declare hidden void @_fdt_packblocks(ptr noundef, ptr noundef, i32 noundef, i32 noundef) #1

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

10:                                               ; preds = %1
  %11 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %11, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %13

12:                                               ; preds = %1
  store i32 0, ptr %6, align 4
  br label %13

13:                                               ; preds = %12, %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  %14 = load i32, ptr %6, align 4
  switch i32 %14, label %32 [
    i32 0, label %15
  ]

15:                                               ; preds = %13
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = call i32 @fdt_num_mem_rsv(ptr noundef %16)
  %18 = add nsw i32 %17, 1
  %19 = sext i32 %18 to i64
  %20 = mul i64 %19, 16
  %21 = trunc i64 %20 to i32
  store i32 %21, ptr %4, align 4, !tbaa !9
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = load i32, ptr %4, align 4, !tbaa !9
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.fdt_header, ptr %25, i32 0, i32 9
  %27 = load i32, ptr %26, align 4, !tbaa !11
  %28 = call i32 @fdt32_to_cpu(i32 noundef %27)
  call void @_fdt_packblocks(ptr noundef %22, ptr noundef %23, i32 noundef %24, i32 noundef %28)
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = call i32 @_fdt_data_size(ptr noundef %30)
  call void @fdt_set_totalsize(ptr noundef %29, i32 noundef %31)
  store i32 0, ptr %2, align 4
  store i32 1, ptr %6, align 4
  br label %32

32:                                               ; preds = %15, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %33 = load i32, ptr %2, align 4
  ret i32 %33
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @_fdt_data_size(ptr noundef) #3

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 = { "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 = { inlinehint 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 #4 = { 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 = !{!12, !10, i64 36}
!12 = !{!"fdt_header", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !10, i64 28, !10, i64 32, !10, 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"

; Function Attrs: nounwind uwtable
declare hidden i32 @_fdt_rw_check_header(ptr noundef) local_unnamed_addr #0

declare i32 @fdt_num_mem_rsv(ptr noundef) local_unnamed_addr #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @fdt32_to_cpu(i32 noundef) local_unnamed_addr #2

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @fdt_set_totalsize(ptr noundef, i32 noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden void @_fdt_packblocks(ptr noundef, ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @fdt_pack(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call i32 @_fdt_rw_check_header(ptr noundef %0)
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %3, label %11

3:                                                ; preds = %1
  %4 = tail call i32 @fdt_num_mem_rsv(ptr noundef %0) #3
  %5 = shl i32 %4, 4
  %6 = add i32 %5, 16
  %7 = getelementptr inbounds i8, ptr %0, i64 36
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = tail call i32 @fdt32_to_cpu(i32 noundef %8)
  tail call void @_fdt_packblocks(ptr noundef %0, ptr noundef %0, i32 noundef %6, i32 noundef %9)
  %10 = tail call i32 @_fdt_data_size(ptr noundef %0)
  tail call void @fdt_set_totalsize(ptr noundef %0, i32 noundef %10)
  br label %11

11:                                               ; preds = %1, %3
  ret i32 %2
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden i32 @_fdt_data_size(ptr noundef) local_unnamed_addr #2

attributes #0 = { 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 #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 = { inlinehint 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, !7, i64 36}
!6 = !{!"fdt_header", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !7, i64 28, !7, i64 32, !7, i64 36}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


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