; LLVM IR from libtcod/libtcod :: src/libtcod (list_c)

; 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.TCOD_List = type { ptr, i32, i32 }

; 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 ptr @TCOD_list_end(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local ptr @TCOD_list_remove_iterator(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %8, ptr %6, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %20, %2
  %10 = load ptr, ptr %6, align 8, !tbaa !5
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = call ptr @TCOD_list_end(ptr noundef %11)
  %13 = getelementptr inbounds ptr, ptr %12, i64 -1
  %14 = icmp ult ptr %10, %13
  br i1 %14, label %15, label %23

15:                                               ; preds = %9
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = getelementptr inbounds ptr, ptr %16, i64 1
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %18, ptr %19, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %15
  %21 = load ptr, ptr %6, align 8, !tbaa !5
  %22 = getelementptr inbounds ptr, ptr %21, i32 1
  store ptr %22, ptr %6, align 8, !tbaa !5
  br label %9, !llvm.loop !9

23:                                               ; preds = %9
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.TCOD_List, ptr %24, i32 0, i32 1
  %26 = load i32, ptr %25, align 8, !tbaa !11
  %27 = add nsw i32 %26, -1
  store i32 %27, ptr %25, align 8, !tbaa !11
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.TCOD_List, ptr %28, i32 0, i32 1
  %30 = load i32, ptr %29, align 8, !tbaa !11
  %31 = icmp eq i32 %30, 0
  br i1 %31, label %32, label %33

32:                                               ; preds = %23
  store ptr getelementptr inbounds (ptr, ptr null, i64 -1), ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %36

33:                                               ; preds = %23
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds ptr, ptr %34, i64 -1
  store ptr %35, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %36

36:                                               ; preds = %33, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %37 = load ptr, ptr %3, align 8
  ret ptr %37
}

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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !13, i64 8}
!12 = !{!"TCOD_List", !6, i64 0, !13, i64 8, !13, i64 12}
!13 = !{!"int", !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 ptr @TCOD_list_end(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local nonnull ptr @TCOD_list_remove_iterator(ptr noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = tail call ptr @TCOD_list_end(ptr noundef %0)
  %4 = getelementptr inbounds i8, ptr %3, i64 -8
  %5 = icmp ugt ptr %4, %1
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.011 = phi ptr [ %6, %.lr.ph ], [ %1, %2 ]
  %6 = getelementptr inbounds i8, ptr %.011, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %7, ptr %.011, align 8, !tbaa !5
  %8 = tail call ptr @TCOD_list_end(ptr noundef %0)
  %9 = getelementptr inbounds i8, ptr %8, i64 -8
  %10 = icmp ult ptr %6, %9
  br i1 %10, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %2
  %11 = getelementptr inbounds i8, ptr %0, i64 8
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %11, align 8, !tbaa !11
  %14 = icmp eq i32 %13, 0
  %15 = getelementptr inbounds i8, ptr %1, i64 -8
  %.010 = select i1 %14, ptr inttoptr (i64 -8 to ptr), ptr %15
  ret ptr %.010
}

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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !13, i64 8}
!12 = !{!"TCOD_List", !6, i64 0, !13, i64 8, !13, i64 12}
!13 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass