; LLVM IR from wichue/nethello :: src/base/File.ll (ZN3chw8fileSizeEP8_IO_FILEb)

; 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

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

declare i32 @fseek(ptr noundef, i64 noundef, i32 noundef) #1

declare i64 @ftell(ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN3chw8fileSizeEP8_IO_FILEb(ptr noundef %0, i1 noundef zeroext %1) #2 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i8, align 1
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  %8 = zext i1 %1 to i8
  store i8 %8, ptr %5, align 1, !tbaa !9
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %12, label %11

11:                                               ; preds = %2
  store i64 0, ptr %3, align 8
  br label %31

12:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = call i64 @ftell(ptr noundef %13)
  store i64 %14, ptr %6, align 8, !tbaa !11
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = call i32 @fseek(ptr noundef %15, i64 noundef 0, i32 noundef 2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = call i64 @ftell(ptr noundef %17)
  store i64 %18, ptr %7, align 8, !tbaa !11
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %6, align 8, !tbaa !11
  %21 = call i32 @fseek(ptr noundef %19, i64 noundef %20, i32 noundef 0)
  %22 = load i64, ptr %7, align 8, !tbaa !11
  %23 = load i8, ptr %5, align 1, !tbaa !9, !range !13, !noundef !14
  %24 = trunc i8 %23 to i1
  br i1 %24, label %25, label %27

25:                                               ; preds = %12
  %26 = load i64, ptr %6, align 8, !tbaa !11
  br label %28

27:                                               ; preds = %12
  br label %28

28:                                               ; preds = %27, %25
  %29 = phi i64 [ %26, %25 ], [ 0, %27 ]
  %30 = sub nsw i64 %22, %29
  store i64 %30, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %31

31:                                               ; preds = %28, %11
  %32 = load i64, ptr %3, align 8
  ret i64 %32
}

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 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}


; 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: nofree nounwind
declare noundef i32 @fseek(ptr nocapture noundef, i64 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i64 @ftell(ptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local noundef i64 @_ZN3chw8fileSizeEP8_IO_FILEb(ptr noundef %0, i1 noundef zeroext %1) local_unnamed_addr #1 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %10, label %3

3:                                                ; preds = %2
  %4 = tail call i64 @ftell(ptr noundef nonnull %0)
  %5 = tail call i32 @fseek(ptr noundef nonnull %0, i64 noundef 0, i32 noundef 2)
  %6 = tail call i64 @ftell(ptr noundef nonnull %0)
  %7 = tail call i32 @fseek(ptr noundef nonnull %0, i64 noundef %4, i32 noundef 0)
  %8 = select i1 %1, i64 %4, i64 0
  %9 = sub nsw i64 %6, %8
  br label %10

10:                                               ; preds = %2, %3
  %.0 = phi i64 [ %9, %3 ], [ 0, %2 ]
  ret i64 %.0
}

attributes #0 = { nofree 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 #1 = { mustprogress nofree 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" }

!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)"}


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