; LLVM IR from niessner/Matterport :: code/gaps/pkgs/RNBasics/RNArray.ll (ZN8RNVArray14InternalRemoveEi)

; 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"

%class.RNVArray = type { ptr, i32, i32 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN8RNVArray5ShiftEiii(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef, i32 noundef, i32 noundef) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN8RNVArray14InternalRemoveEi(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = getelementptr inbounds %class.RNVArray, ptr %5, i32 0, i32 2
  %8 = load i32, ptr %7, align 4, !tbaa !11
  %9 = sub nsw i32 %8, 1
  %10 = icmp slt i32 %6, %9
  br i1 %10, label %11, label %14

11:                                               ; preds = %2
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = add nsw i32 %12, 1
  call void @_ZN8RNVArray5ShiftEiii(ptr noundef nonnull align 8 dereferenceable(16) %5, i32 noundef %13, i32 noundef 0, i32 noundef -1)
  br label %14

14:                                               ; preds = %11, %2
  %15 = getelementptr inbounds %class.RNVArray, ptr %5, i32 0, i32 2
  %16 = load i32, ptr %15, align 4, !tbaa !11
  %17 = add nsw i32 %16, -1
  store i32 %17, ptr %15, align 4, !tbaa !11
  ret void
}

attributes #0 = { mustprogress 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 = { 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" }

!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 12}
!12 = !{!"_ZTS8RNVArray", !6, i64 0, !10, i64 8, !10, i64 12}


; 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: mustprogress nounwind uwtable
declare dso_local void @_ZN8RNVArray5ShiftEiii(ptr noundef nonnull align 8 dereferenceable(16), i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN8RNVArray14InternalRemoveEi(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = add nsw i32 %4, -1
  %6 = icmp sgt i32 %5, %1
  br i1 %6, label %7, label %9

7:                                                ; preds = %2
  %8 = add nsw i32 %1, 1
  tail call void @_ZN8RNVArray5ShiftEiii(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %8, i32 noundef 0, i32 noundef -1)
  %.pre = load i32, ptr %3, align 4, !tbaa !5
  %.pre2 = add nsw i32 %.pre, -1
  br label %9

9:                                                ; preds = %7, %2
  %.pre-phi = phi i32 [ %.pre2, %7 ], [ %5, %2 ]
  store i32 %.pre-phi, ptr %3, align 4, !tbaa !5
  ret void
}

attributes #0 = { mustprogress 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, !10, i64 12}
!6 = !{!"_ZTS8RNVArray", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass