; LLVM IR from overnote/over-algorithm :: code/code-c-like/01-list/01-SqList.ll (Z10DeleteElemR6SqListiRi)

; 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.SqList = type { [5 x i32], i32 }

@.str.5 = external hidden unnamed_addr constant [23 x i8], align 1

declare i32 @printf(ptr noundef, ...) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z10DeleteElemR6SqListiRi(ptr noundef nonnull align 4 dereferenceable(24) %0, i32 noundef %1, ptr noundef nonnull align 4 dereferenceable(4) %2) #2 {
  %4 = alloca i1, align 1
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = icmp slt i32 %9, 1
  br i1 %10, label %17, label %11

11:                                               ; preds = %3
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.SqList, ptr %13, i32 0, i32 1
  %15 = load i32, ptr %14, align 4, !tbaa !11
  %16 = icmp sgt i32 %12, %15
  br i1 %16, label %17, label %19

17:                                               ; preds = %11, %3
  %18 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  store i1 false, ptr %4, align 1
  br label %57

19:                                               ; preds = %11
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.SqList, ptr %20, i32 0, i32 0
  %22 = load i32, ptr %6, align 4, !tbaa !9
  %23 = sub nsw i32 %22, 1
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [5 x i32], ptr %21, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  store i32 %26, ptr %27, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %28 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %28, ptr %8, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %49, %19
  %30 = load i32, ptr %8, align 4, !tbaa !9
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.SqList, ptr %31, i32 0, i32 1
  %33 = load i32, ptr %32, align 4, !tbaa !11
  %34 = icmp slt i32 %30, %33
  br i1 %34, label %36, label %35

35:                                               ; preds = %29
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  br label %52

36:                                               ; preds = %29
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.SqList, ptr %37, i32 0, i32 0
  %39 = load i32, ptr %8, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds [5 x i32], ptr %38, i64 0, i64 %40
  %42 = load i32, ptr %41, align 4, !tbaa !9
  %43 = load ptr, ptr %5, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.SqList, ptr %43, i32 0, i32 0
  %45 = load i32, ptr %8, align 4, !tbaa !9
  %46 = sub nsw i32 %45, 1
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [5 x i32], ptr %44, i64 0, i64 %47
  store i32 %42, ptr %48, align 4, !tbaa !9
  br label %49

49:                                               ; preds = %36
  %50 = load i32, ptr %8, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %8, align 4, !tbaa !9
  br label %29, !llvm.loop !13

52:                                               ; preds = %35
  %53 = load ptr, ptr %5, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.SqList, ptr %53, i32 0, i32 1
  %55 = load i32, ptr %54, align 4, !tbaa !11
  %56 = add nsw i32 %55, -1
  store i32 %56, ptr %54, align 4, !tbaa !11
  store i1 true, ptr %4, align 1
  br label %57

57:                                               ; preds = %52, %17
  %58 = load i1, ptr %4, align 1
  ret i1 %58
}

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 20}
!12 = !{!"_ZTS6SqList", !7, i64 0, !10, i64 20}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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"

@.str.5 = external hidden unnamed_addr constant [23 x i8], align 1

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local noundef zeroext i1 @_Z10DeleteElemR6SqListiRi(ptr nocapture noundef nonnull align 4 dereferenceable(24) %0, i32 noundef %1, ptr nocapture noundef nonnull writeonly align 4 dereferenceable(4) %2) local_unnamed_addr #1 {
  %4 = icmp slt i32 %1, 1
  br i1 %4, label %9, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 20
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = icmp slt i32 %7, %1
  br i1 %8, label %9, label %11

9:                                                ; preds = %5, %3
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  br label %28

11:                                               ; preds = %5
  %12 = add nsw i32 %1, -1
  %13 = zext nneg i32 %12 to i64
  %14 = getelementptr inbounds [5 x i32], ptr %0, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !10
  store i32 %15, ptr %2, align 4, !tbaa !10
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = icmp sgt i32 %16, %1
  br i1 %17, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %11
  %18 = zext nneg i32 %1 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %11
  %.lcssa = phi i32 [ %16, %11 ], [ %25, %.lr.ph ]
  %19 = add nsw i32 %.lcssa, -1
  store i32 %19, ptr %6, align 4, !tbaa !5
  br label %28

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %18, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %20 = getelementptr inbounds [5 x i32], ptr %0, i64 0, i64 %indvars.iv
  %21 = load i32, ptr %20, align 4, !tbaa !10
  %22 = add nuw i64 %indvars.iv, 4294967295
  %23 = and i64 %22, 4294967295
  %24 = getelementptr inbounds [5 x i32], ptr %0, i64 0, i64 %23
  store i32 %21, ptr %24, align 4, !tbaa !10
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = trunc nuw i64 %indvars.iv.next to i32
  %27 = icmp sgt i32 %25, %26
  br i1 %27, label %.lr.ph, label %._crit_edge, !llvm.loop !11

28:                                               ; preds = %._crit_edge, %9
  %.015 = phi i1 [ false, %9 ], [ true, %._crit_edge ]
  ret i1 %.015
}

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)"}
!5 = !{!6, !9, i64 20}
!6 = !{!"_ZTS6SqList", !7, i64 0, !9, i64 20}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!9, !9, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass