; LLVM IR from KishanBGajera/2024-366-Days-Of-DSA :: Data Structures/Non-Linear/Heap/Min Heap/C (main)

; 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.MinHeap = 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 void @minHeapify(ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @buildMinHeap(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %9 = load i32, ptr %6, align 4, !tbaa !9
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.MinHeap, ptr %10, i32 0, i32 2
  store i32 %9, ptr %11, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %12

12:                                               ; preds = %29, %3
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %32

17:                                               ; preds = %12
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.MinHeap, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  store i32 %22, ptr %28, align 4, !tbaa !9
  br label %29

29:                                               ; preds = %17
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !9
  br label %12, !llvm.loop !14

32:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = sdiv i32 %33, 2
  %35 = sub nsw i32 %34, 1
  store i32 %35, ptr %8, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %43, %32
  %37 = load i32, ptr %8, align 4, !tbaa !9
  %38 = icmp sge i32 %37, 0
  br i1 %38, label %40, label %39

39:                                               ; preds = %36
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %46

40:                                               ; preds = %36
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load i32, ptr %8, align 4, !tbaa !9
  call void @minHeapify(ptr noundef %41, i32 noundef %42)
  br label %43

43:                                               ; preds = %40
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = add nsw i32 %44, -1
  store i32 %45, ptr %8, align 4, !tbaa !9
  br label %36, !llvm.loop !16

46:                                               ; preds = %39
  ret void
}

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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 12}
!12 = !{!"MinHeap", !6, i64 0, !10, i64 8, !10, i64 12}
!13 = !{!12, !6, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; 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 void @minHeapify(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @buildMinHeap(ptr noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 12
  store i32 %2, ptr %4, align 4, !tbaa !5
  %5 = icmp sgt i32 %2, 0
  br i1 %5, label %.lr.ph, label %._crit_edge19

.lr.ph:                                           ; preds = %3
  %6 = ptrtoint ptr %1 to i64
  %7 = load ptr, ptr %0, align 8, !tbaa !11
  %wide.trip.count = zext nneg i32 %2 to i64
  %min.iters.check = icmp ult i32 %2, 8
  %8 = ptrtoint ptr %7 to i64
  %9 = sub i64 %8, %6
  %diff.check = icmp ult i64 %9, 32
  %or.cond = select i1 %min.iters.check, i1 true, i1 %diff.check
  br i1 %or.cond, label %scalar.ph.preheader, label %vector.ph

scalar.ph.preheader:                              ; preds = %middle.block, %.lr.ph
  %indvars.iv.ph = phi i64 [ 0, %.lr.ph ], [ %n.vec, %middle.block ]
  %xtraiter = and i64 %wide.trip.count, 3
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol

scalar.ph.prol:                                   ; preds = %scalar.ph.preheader, %scalar.ph.prol
  %indvars.iv.prol = phi i64 [ %indvars.iv.next.prol, %scalar.ph.prol ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %prol.iter = phi i64 [ %prol.iter.next, %scalar.ph.prol ], [ 0, %scalar.ph.preheader ]
  %10 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.prol
  %11 = load i32, ptr %10, align 4, !tbaa !12
  %12 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv.prol
  store i32 %11, ptr %12, align 4, !tbaa !12
  %indvars.iv.next.prol = add nuw nsw i64 %indvars.iv.prol, 1
  %prol.iter.next = add i64 %prol.iter, 1
  %prol.iter.cmp.not = icmp eq i64 %prol.iter.next, %xtraiter
  br i1 %prol.iter.cmp.not, label %scalar.ph.prol.loopexit, label %scalar.ph.prol, !llvm.loop !13

scalar.ph.prol.loopexit:                          ; preds = %scalar.ph.prol, %scalar.ph.preheader
  %indvars.iv.unr = phi i64 [ %indvars.iv.ph, %scalar.ph.preheader ], [ %indvars.iv.next.prol, %scalar.ph.prol ]
  %13 = sub nsw i64 %indvars.iv.ph, %wide.trip.count
  %14 = icmp ugt i64 %13, -4
  br i1 %14, label %._crit_edge, label %scalar.ph

vector.ph:                                        ; preds = %.lr.ph
  %n.vec = and i64 %wide.trip.count, 2147483640
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %15 = getelementptr inbounds i32, ptr %1, i64 %index
  %16 = getelementptr inbounds i8, ptr %15, i64 16
  %wide.load = load <4 x i32>, ptr %15, align 4, !tbaa !12
  %wide.load21 = load <4 x i32>, ptr %16, align 4, !tbaa !12
  %17 = getelementptr inbounds i32, ptr %7, i64 %index
  %18 = getelementptr inbounds i8, ptr %17, i64 16
  store <4 x i32> %wide.load, ptr %17, align 4, !tbaa !12
  store <4 x i32> %wide.load21, ptr %18, align 4, !tbaa !12
  %index.next = add nuw i64 %index, 8
  %19 = icmp eq i64 %index.next, %n.vec
  br i1 %19, label %middle.block, label %vector.body, !llvm.loop !15

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br i1 %cmp.n, label %._crit_edge, label %scalar.ph.preheader

._crit_edge:                                      ; preds = %scalar.ph.prol.loopexit, %scalar.ph, %middle.block
  %.not = icmp eq i32 %2, 1
  br i1 %.not, label %._crit_edge19, label %.lr.ph18.preheader

.lr.ph18.preheader:                               ; preds = %._crit_edge
  %20 = lshr i32 %2, 1
  br label %.lr.ph18

scalar.ph:                                        ; preds = %scalar.ph.prol.loopexit, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next.3, %scalar.ph ], [ %indvars.iv.unr, %scalar.ph.prol.loopexit ]
  %21 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %22 = load i32, ptr %21, align 4, !tbaa !12
  %23 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv
  store i32 %22, ptr %23, align 4, !tbaa !12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %24 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next
  %25 = load i32, ptr %24, align 4, !tbaa !12
  %26 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv.next
  store i32 %25, ptr %26, align 4, !tbaa !12
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %27 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.1
  %28 = load i32, ptr %27, align 4, !tbaa !12
  %29 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv.next.1
  store i32 %28, ptr %29, align 4, !tbaa !12
  %indvars.iv.next.2 = add nuw nsw i64 %indvars.iv, 3
  %30 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.2
  %31 = load i32, ptr %30, align 4, !tbaa !12
  %32 = getelementptr inbounds i32, ptr %7, i64 %indvars.iv.next.2
  store i32 %31, ptr %32, align 4, !tbaa !12
  %indvars.iv.next.3 = add nuw nsw i64 %indvars.iv, 4
  %exitcond.not.3 = icmp eq i64 %indvars.iv.next.3, %wide.trip.count
  br i1 %exitcond.not.3, label %._crit_edge, label %scalar.ph, !llvm.loop !19

._crit_edge19:                                    ; preds = %.lr.ph18, %3, %._crit_edge
  ret void

.lr.ph18:                                         ; preds = %.lr.ph18.preheader, %.lr.ph18
  %.0.in16 = phi i32 [ %.0, %.lr.ph18 ], [ %20, %.lr.ph18.preheader ]
  %.0 = add nsw i32 %.0.in16, -1
  tail call void @minHeapify(ptr noundef nonnull %0, i32 noundef %.0)
  %33 = icmp ugt i32 %.0.in16, 1
  br i1 %33, label %.lr.ph18, label %._crit_edge19, !llvm.loop !20
}

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, !10, i64 12}
!6 = !{!"MinHeap", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!10, !10, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.unroll.disable"}
!15 = distinct !{!15, !16, !17, !18}
!16 = !{!"llvm.loop.mustprogress"}
!17 = !{!"llvm.loop.isvectorized", i32 1}
!18 = !{!"llvm.loop.unroll.runtime.disable"}
!19 = distinct !{!19, !16, !17}
!20 = distinct !{!20, !16}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass