; LLVM IR from littlefs-project/littlefs :: lfs (lfs_file_read)

; 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.lfs = type { %struct.lfs_cache, %struct.lfs_cache, [2 x i32], ptr, i32, %struct.lfs_gstate, %struct.lfs_gstate, %struct.lfs_gstate, %struct.lfs_lookahead, ptr, i32, i32, i32, i32, i32 }
%struct.lfs_cache = type { i32, i32, i32, ptr }
%struct.lfs_gstate = type { i32, [2 x i32] }
%struct.lfs_lookahead = type { i32, i32, i32, i32, ptr }

@.str.1 = external hidden unnamed_addr constant [65 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [54 x i8], align 1
@__PRETTY_FUNCTION__.lfs_file_read = external hidden unnamed_addr constant [69 x i8], align 1

; 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
declare hidden zeroext i1 @lfs_mlist_isopen(ptr noundef, ptr noundef) #1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @lfs_file_read(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.lfs, ptr %13, i32 0, i32 9
  %15 = load ptr, ptr %14, align 8, !tbaa !11
  store i32 0, ptr %10, align 4, !tbaa !9
  %16 = load i32, ptr %10, align 4, !tbaa !9
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %4
  %19 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %19, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %38

20:                                               ; preds = %4
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.lfs, ptr %21, i32 0, i32 3
  %23 = load ptr, ptr %22, align 8, !tbaa !16
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = call zeroext i1 @lfs_mlist_isopen(ptr noundef %23, ptr noundef %24)
  br i1 %25, label %26, label %27

26:                                               ; preds = %20
  br label %28

27:                                               ; preds = %20
  call void @__assert_fail(ptr noundef @.str.2, ptr noundef @.str.1, i32 noundef 6187, ptr noundef @__PRETTY_FUNCTION__.lfs_file_read) #4
  unreachable

28:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %29 = load ptr, ptr %6, align 8, !tbaa !5
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  %31 = load ptr, ptr %8, align 8, !tbaa !5
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = call i32 @lfs_file_read_(ptr noundef %29, ptr noundef %30, ptr noundef %31, i32 noundef %32)
  store i32 %33, ptr %12, align 4, !tbaa !9
  %34 = load ptr, ptr %6, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.lfs, ptr %34, i32 0, i32 9
  %36 = load ptr, ptr %35, align 8, !tbaa !11
  %37 = load i32, ptr %12, align 4, !tbaa !9
  store i32 %37, ptr %5, align 4
  store i32 1, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %38

38:                                               ; preds = %28, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %39 = load i32, ptr %5, align 4
  ret i32 %39
}

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

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 = { noreturn nounwind "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 }
attributes #4 = { noreturn 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, !6, i64 128}
!12 = !{!"lfs", !13, i64 0, !13, i64 24, !7, i64 48, !6, i64 56, !10, i64 64, !14, i64 68, !14, i64 80, !14, i64 92, !15, i64 104, !6, i64 128, !10, i64 136, !10, i64 140, !10, i64 144, !10, i64 148, !10, i64 152}
!13 = !{!"lfs_cache", !10, i64 0, !10, i64 4, !10, i64 8, !6, i64 16}
!14 = !{!"lfs_gstate", !10, i64 0, !7, i64 4}
!15 = !{!"lfs_lookahead", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !6, i64 16}
!16 = !{!12, !6, i64 56}


; 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"

@.str.1 = external hidden unnamed_addr constant [65 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [54 x i8], align 1
@__PRETTY_FUNCTION__.lfs_file_read = external hidden unnamed_addr constant [69 x i8], align 1

; Function Attrs: nounwind uwtable
declare hidden zeroext i1 @lfs_mlist_isopen(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @lfs_file_read(ptr noundef %0, ptr noundef %1, ptr noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = getelementptr inbounds i8, ptr %0, i64 56
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = tail call zeroext i1 @lfs_mlist_isopen(ptr noundef %6, ptr noundef %1)
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  tail call void @__assert_fail(ptr noundef nonnull @.str.2, ptr noundef nonnull @.str.1, i32 noundef 6187, ptr noundef nonnull @__PRETTY_FUNCTION__.lfs_file_read) #2
  unreachable

9:                                                ; preds = %4
  %10 = tail call i32 @lfs_file_read_(ptr noundef nonnull %0, ptr noundef %1, ptr noundef %2, i32 noundef %3)
  ret i32 %10
}

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

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 = { noreturn nounwind "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 = { noreturn 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, !11, i64 56}
!6 = !{!"lfs", !7, i64 0, !7, i64 24, !9, i64 48, !11, i64 56, !8, i64 64, !12, i64 68, !12, i64 80, !12, i64 92, !13, i64 104, !11, i64 128, !8, i64 136, !8, i64 140, !8, i64 144, !8, i64 148, !8, i64 152}
!7 = !{!"lfs_cache", !8, i64 0, !8, i64 4, !8, i64 8, !11, i64 16}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = !{!"any pointer", !9, i64 0}
!12 = !{!"lfs_gstate", !8, i64 0, !9, i64 4}
!13 = !{!"lfs_lookahead", !8, i64 0, !8, i64 4, !8, i64 8, !8, i64 12, !11, i64 16}


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