; LLVM IR from hoytech/vmtouch :: vmtouch (compare_func)

; 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.dev_and_inode = type { i64, i64 }

; 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 @compare_func(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %10, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %11, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.dev_and_inode, ptr %12, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !9
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.dev_and_inode, ptr %15, i32 0, i32 1
  %17 = load i64, ptr %16, align 8, !tbaa !9
  %18 = icmp ugt i64 %14, %17
  %19 = zext i1 %18 to i32
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.dev_and_inode, ptr %20, i32 0, i32 1
  %22 = load i64, ptr %21, align 8, !tbaa !9
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.dev_and_inode, ptr %23, i32 0, i32 1
  %25 = load i64, ptr %24, align 8, !tbaa !9
  %26 = icmp ult i64 %22, %25
  %27 = zext i1 %26 to i32
  %28 = sub nsw i32 %19, %27
  store i32 %28, ptr %8, align 4, !tbaa !12
  %29 = load i32, ptr %8, align 4, !tbaa !12
  %30 = icmp ne i32 %29, 0
  br i1 %30, label %31, label %33

31:                                               ; preds = %2
  %32 = load i32, ptr %8, align 4, !tbaa !12
  store i32 %32, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %51

33:                                               ; preds = %2
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.dev_and_inode, ptr %34, i32 0, i32 0
  %36 = load i64, ptr %35, align 8, !tbaa !14
  %37 = load ptr, ptr %7, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.dev_and_inode, ptr %37, i32 0, i32 0
  %39 = load i64, ptr %38, align 8, !tbaa !14
  %40 = icmp ugt i64 %36, %39
  %41 = zext i1 %40 to i32
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.dev_and_inode, ptr %42, i32 0, i32 0
  %44 = load i64, ptr %43, align 8, !tbaa !14
  %45 = load ptr, ptr %7, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.dev_and_inode, ptr %45, i32 0, i32 0
  %47 = load i64, ptr %46, align 8, !tbaa !14
  %48 = icmp ult i64 %44, %47
  %49 = zext i1 %48 to i32
  %50 = sub nsw i32 %41, %49
  store i32 %50, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %51

51:                                               ; preds = %33, %31
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %52 = load i32, ptr %3, align 4
  ret i32 %52
}

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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !11, i64 8}
!10 = !{!"dev_and_inode", !11, i64 0, !11, i64 8}
!11 = !{!"long", !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"int", !7, i64 0}
!14 = !{!10, !11, 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local range(i32 -1, 2) i32 @compare_func(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %1, i64 8
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = icmp ugt i64 %4, %6
  %8 = zext i1 %7 to i32
  %9 = icmp ult i64 %4, %6
  %.neg = sext i1 %9 to i32
  %10 = add nsw i32 %.neg, %8
  %.not = icmp eq i32 %10, 0
  br i1 %.not, label %11, label %18

11:                                               ; preds = %2
  %12 = load i64, ptr %0, align 8, !tbaa !10
  %13 = load i64, ptr %1, align 8, !tbaa !10
  %14 = icmp ugt i64 %12, %13
  %15 = zext i1 %14 to i32
  %16 = icmp ult i64 %12, %13
  %.neg13 = sext i1 %16 to i32
  %17 = add nsw i32 %.neg13, %15
  br label %18

18:                                               ; preds = %2, %11
  %.0 = phi i32 [ %17, %11 ], [ %10, %2 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 8}
!6 = !{!"dev_and_inode", !7, i64 0, !7, i64 8}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 0}


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