; LLVM IR from upupming/algorithm :: acwing/算法竞赛进阶指南/0x13-链表与邻接表/136. 邻值查找.ll (Z6removei)

; 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.Node = type { i32, i32, i32, i32 }

@node = external dso_local global [100010 x %struct.Node], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6removei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = sext i32 %3 to i64
  %5 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %4
  %6 = getelementptr inbounds %struct.Node, ptr %5, i32 0, i32 3
  %7 = load i32, ptr %6, align 4, !tbaa !9
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %9
  %11 = getelementptr inbounds %struct.Node, ptr %10, i32 0, i32 2
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %13
  %15 = getelementptr inbounds %struct.Node, ptr %14, i32 0, i32 3
  store i32 %7, ptr %15, align 4, !tbaa !9
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %17
  %19 = getelementptr inbounds %struct.Node, ptr %18, i32 0, i32 2
  %20 = load i32, ptr %19, align 8, !tbaa !11
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %22
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 3
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %26
  %28 = getelementptr inbounds %struct.Node, ptr %27, i32 0, i32 2
  store i32 %20, ptr %28, align 8, !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" }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 12}
!10 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4, !6, i64 8, !6, i64 12}
!11 = !{!10, !6, i64 8}


; 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"

%struct.Node = type { i32, i32, i32, i32 }

@node = external dso_local local_unnamed_addr global [100010 x %struct.Node], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z6removei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %2
  %4 = getelementptr inbounds i8, ptr %3, i64 12
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %3, i64 8
  %7 = load i32, ptr %6, align 8, !tbaa !10
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %8, i32 3
  store i32 %5, ptr %9, align 4, !tbaa !5
  %10 = sext i32 %5 to i64
  %11 = getelementptr inbounds [100010 x %struct.Node], ptr @node, i64 0, i64 %10, i32 2
  store i32 %7, ptr %11, align 8, !tbaa !10
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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, !7, i64 12}
!6 = !{!"_ZTS4Node", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}


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