; LLVM IR from thalium/icebox :: third_party/virtualbox/src/VBox/Devices/EFI/Firmware/OvmfPkg/Library (FileHandleReadToNewBuffer)

; 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 void @FreePool(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @FileHandleReadToNewBuffer(ptr noundef %0, i64 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %10 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %10, ptr %7, align 8, !tbaa !9
  %11 = load i64, ptr %5, align 8, !tbaa !9
  %12 = call ptr @AllocatePool(i64 noundef %11)
  store ptr %12, ptr %8, align 8, !tbaa !5
  %13 = load ptr, ptr %8, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %28

15:                                               ; preds = %2
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = call i64 @FileHandleRead(ptr noundef %16, ptr noundef %5, ptr noundef %17)
  store i64 %18, ptr %6, align 8, !tbaa !9
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = icmp slt i64 %19, 0
  br i1 %20, label %25, label %21

21:                                               ; preds = %15
  %22 = load i64, ptr %7, align 8, !tbaa !9
  %23 = load i64, ptr %5, align 8, !tbaa !9
  %24 = icmp ne i64 %22, %23
  br i1 %24, label %25, label %27

25:                                               ; preds = %21, %15
  %26 = load ptr, ptr %8, align 8, !tbaa !5
  call void @FreePool(ptr noundef %26)
  store ptr null, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %30

27:                                               ; preds = %21
  br label %28

28:                                               ; preds = %27, %2
  %29 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %29, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %30

30:                                               ; preds = %28, %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  %31 = load ptr, ptr %3, align 8
  ret ptr %31
}

declare ptr @AllocatePool(i64 noundef) #1

declare i64 @FileHandleRead(ptr noundef, ptr noundef, ptr noundef) #1

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 = { 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, !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 long", !7, 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"

declare void @FreePool(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @FileHandleReadToNewBuffer(ptr noundef %0, i64 noundef %1) local_unnamed_addr #1 {
  %3 = alloca i64, align 8
  store i64 %1, ptr %3, align 8, !tbaa !5
  %4 = tail call ptr @AllocatePool(i64 noundef %1) #2
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %10, label %5

5:                                                ; preds = %2
  %6 = call i64 @FileHandleRead(ptr noundef %0, ptr noundef nonnull %3, ptr noundef nonnull %4) #2
  %7 = icmp sgt i64 %6, -1
  %8 = load i64, ptr %3, align 8
  %.not8 = icmp eq i64 %8, %1
  %or.cond = select i1 %7, i1 %.not8, i1 false
  br i1 %or.cond, label %10, label %9

9:                                                ; preds = %5
  call void @FreePool(ptr noundef nonnull %4) #2
  br label %10

10:                                               ; preds = %2, %5, %9
  %.0 = phi ptr [ null, %9 ], [ %4, %5 ], [ null, %2 ]
  ret ptr %.0
}

declare ptr @AllocatePool(i64 noundef) local_unnamed_addr #0

declare i64 @FileHandleRead(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

attributes #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 = { 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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