; LLVM IR from jspd-group/pegit :: src (strbuf)

; 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.strbuf = type { i64, i64, ptr }

; 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 dso_local void @strbuf_grow(ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @strbuf_release(ptr noundef) #1

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @strbuf_setlen(ptr noundef, i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i64 @strbuf_fread(ptr noundef %0, i64 noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.strbuf, ptr %9, i32 0, i32 0
  %11 = load i64, ptr %10, align 8, !tbaa !11
  store i64 %11, ptr %8, align 8, !tbaa !9
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %5, align 8, !tbaa !9
  call void @strbuf_grow(ptr noundef %12, i64 noundef %13)
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.strbuf, ptr %14, i32 0, i32 2
  %16 = load ptr, ptr %15, align 8, !tbaa !13
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.strbuf, ptr %17, i32 0, i32 1
  %19 = load i64, ptr %18, align 8, !tbaa !14
  %20 = getelementptr inbounds i8, ptr %16, i64 %19
  %21 = load i64, ptr %5, align 8, !tbaa !9
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = call i64 @fread(ptr noundef %20, i64 noundef 1, i64 noundef %21, ptr noundef %22)
  store i64 %23, ptr %7, align 8, !tbaa !9
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = icmp ugt i64 %24, 0
  br i1 %25, label %26, label %33

26:                                               ; preds = %3
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.strbuf, ptr %28, i32 0, i32 1
  %30 = load i64, ptr %29, align 8, !tbaa !14
  %31 = load i64, ptr %7, align 8, !tbaa !9
  %32 = add i64 %30, %31
  call void @strbuf_setlen(ptr noundef %27, i64 noundef %32)
  br label %39

33:                                               ; preds = %3
  %34 = load i64, ptr %8, align 8, !tbaa !9
  %35 = icmp eq i64 %34, 0
  br i1 %35, label %36, label %38

36:                                               ; preds = %33
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  call void @strbuf_release(ptr noundef %37)
  br label %38

38:                                               ; preds = %36, %33
  br label %39

39:                                               ; preds = %38, %26
  %40 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret i64 %40
}

declare i64 @fread(ptr noundef, i64 noundef, i64 noundef, 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 = { 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 = { "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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"strbuf", !10, i64 0, !10, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = !{!12, !10, i64 8}


; 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 dso_local void @strbuf_grow(ptr noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @strbuf_release(ptr noundef) local_unnamed_addr #0

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @strbuf_setlen(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef i64 @strbuf_fread(ptr noundef %0, i64 noundef %1, ptr nocapture noundef %2) local_unnamed_addr #0 {
  %4 = load i64, ptr %0, align 8, !tbaa !5
  tail call void @strbuf_grow(ptr noundef nonnull %0, i64 noundef %1)
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load ptr, ptr %5, align 8, !tbaa !11
  %7 = getelementptr inbounds i8, ptr %0, i64 8
  %8 = load i64, ptr %7, align 8, !tbaa !12
  %9 = getelementptr inbounds i8, ptr %6, i64 %8
  %10 = tail call i64 @fread(ptr noundef %9, i64 noundef 1, i64 noundef %1, ptr noundef %2)
  %.not = icmp eq i64 %10, 0
  br i1 %.not, label %14, label %11

11:                                               ; preds = %3
  %12 = load i64, ptr %7, align 8, !tbaa !12
  %13 = add i64 %12, %10
  tail call void @strbuf_setlen(ptr noundef nonnull %0, i64 noundef %13)
  br label %17

14:                                               ; preds = %3
  %15 = icmp eq i64 %4, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %14
  tail call void @strbuf_release(ptr noundef nonnull %0)
  br label %17

17:                                               ; preds = %14, %16, %11
  ret i64 %10
}

; Function Attrs: nofree nounwind
declare noundef i64 @fread(ptr nocapture noundef, i64 noundef, i64 noundef, ptr nocapture 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 = { 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 #2 = { 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" }

!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 0}
!6 = !{!"strbuf", !7, i64 0, !7, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !7, i64 8}


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