; LLVM IR from EyalAr/lwip :: src/lib/png (pngmem)

; 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

; Function Attrs: nounwind uwtable
declare dso_local noalias ptr @png_malloc_base(ptr noalias noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @png_malloc_warn(ptr noalias noundef %0, i64 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %23

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = call noalias ptr @png_malloc_base(ptr noundef %11, i64 noundef %12)
  store ptr %13, ptr %6, align 8, !tbaa !5
  %14 = load ptr, ptr %6, align 8, !tbaa !5
  %15 = icmp ne ptr %14, null
  br i1 %15, label %16, label %18

16:                                               ; preds = %10
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %17, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %20

18:                                               ; preds = %10
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %7, align 4
  br label %20

20:                                               ; preds = %18, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %21 = load i32, ptr %7, align 4
  switch i32 %21, label %26 [
    i32 0, label %22
    i32 1, label %24
  ]

22:                                               ; preds = %20
  br label %23

23:                                               ; preds = %22, %2
  store ptr null, ptr %3, align 8
  br label %24

24:                                               ; preds = %23, %20
  %25 = load ptr, ptr %3, align 8
  ret ptr %25

26:                                               ; preds = %20
  unreachable
}

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, !10, i64 0}
!10 = !{!"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"

; Function Attrs: nounwind uwtable
declare dso_local noalias ptr @png_malloc_base(ptr noalias noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @png_malloc_warn(ptr noalias noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %5, label %3

3:                                                ; preds = %2
  %4 = tail call noalias ptr @png_malloc_base(ptr noundef nonnull %0, i64 noundef %1)
  %.not9.not = icmp eq ptr %4, null
  br i1 %.not9.not, label %5, label %6

5:                                                ; preds = %3, %2
  br label %6

6:                                                ; preds = %3, %5
  %.1 = phi ptr [ %4, %3 ], [ null, %5 ]
  ret ptr %.1
}

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" }

!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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass