; LLVM IR from sbshah97/DS-Algo-Handbook :: Algorithms/Graph_Algorithms/Prim's_MST (prims)

; 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 { i64, i64, ptr }

@arr = external dso_local global [1000005 x %struct.node], align 16
@heapsize = external dso_local global i64, align 8

; Function Attrs: nounwind uwtable
declare dso_local void @heapify(i64 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @pop(ptr dead_on_unwind noalias writable sret(%struct.node) align 8 %0) #0 {
  %2 = load i64, ptr getelementptr inbounds (%struct.node, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), i32 0, i32 1), align 8, !tbaa !5
  %3 = getelementptr inbounds %struct.node, ptr %0, i32 0, i32 1
  store i64 %2, ptr %3, align 8, !tbaa !5
  %4 = load i64, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), align 8, !tbaa !11
  %5 = getelementptr inbounds %struct.node, ptr %0, i32 0, i32 0
  store i64 %4, ptr %5, align 8, !tbaa !11
  %6 = load i64, ptr @heapsize, align 8, !tbaa !12
  %7 = getelementptr inbounds [1000005 x %struct.node], ptr @arr, i64 0, i64 %6
  %8 = getelementptr inbounds %struct.node, ptr %7, i32 0, i32 1
  %9 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %9, ptr getelementptr inbounds (%struct.node, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), i32 0, i32 1), align 8, !tbaa !5
  %10 = load i64, ptr @heapsize, align 8, !tbaa !12
  %11 = getelementptr inbounds [1000005 x %struct.node], ptr @arr, i64 0, i64 %10
  %12 = getelementptr inbounds %struct.node, ptr %11, i32 0, i32 1
  %13 = load i64, ptr %12, align 8, !tbaa !5
  store i64 %13, ptr getelementptr inbounds (%struct.node, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), i32 0, i32 1), align 8, !tbaa !5
  %14 = load i64, ptr @heapsize, align 8, !tbaa !12
  %15 = getelementptr inbounds [1000005 x %struct.node], ptr @arr, i64 0, i64 %14
  %16 = getelementptr inbounds %struct.node, ptr %15, i32 0, i32 0
  %17 = load i64, ptr %16, align 8, !tbaa !11
  store i64 %17, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), align 8, !tbaa !11
  %18 = load i64, ptr @heapsize, align 8, !tbaa !12
  %19 = getelementptr inbounds [1000005 x %struct.node], ptr @arr, i64 0, i64 %18
  %20 = getelementptr inbounds %struct.node, ptr %19, i32 0, i32 0
  %21 = load i64, ptr %20, align 8, !tbaa !11
  store i64 %21, ptr getelementptr inbounds ([1000005 x %struct.node], ptr @arr, i64 0, i64 1), align 8, !tbaa !11
  %22 = load i64, ptr @heapsize, align 8, !tbaa !12
  %23 = add nsw i64 %22, -1
  store i64 %23, ptr @heapsize, align 8, !tbaa !12
  call void @heapify(i64 noundef 1)
  ret void
}

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, !7, i64 8}
!6 = !{!"node", !7, i64 0, !7, i64 8, !10, i64 16}
!7 = !{!"long long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!7, !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"

%struct.node = type { i64, i64, ptr }

@arr = external dso_local local_unnamed_addr global [1000005 x %struct.node], align 16
@heapsize = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: nounwind uwtable
declare dso_local void @heapify(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @pop(ptr dead_on_unwind noalias nocapture writable writeonly sret(%struct.node) align 8 %0) local_unnamed_addr #0 {
  %2 = load <2 x i64>, ptr getelementptr inbounds (i8, ptr @arr, i64 24), align 8, !tbaa !5
  store <2 x i64> %2, ptr %0, align 8, !tbaa !5
  %3 = load i64, ptr @heapsize, align 8, !tbaa !5
  %4 = getelementptr inbounds [1000005 x %struct.node], ptr @arr, i64 0, i64 %3
  %5 = load <2 x i64>, ptr %4, align 8, !tbaa !5
  store <2 x i64> %5, ptr getelementptr inbounds (i8, ptr @arr, i64 24), align 8, !tbaa !5
  %6 = add nsw i64 %3, -1
  store i64 %6, ptr @heapsize, align 8, !tbaa !5
  tail call void @heapify(i64 noundef 1)
  ret void
}

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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferAlignmentPass,InstCombinePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,TailCallElimPass