; LLVM IR from gargarchit/Data_Structure_n_Algorithms :: Algorithms (sparse_matrix_representation)

; 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"

; 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
define dso_local i32 @sparseRep(i32 noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %40, %3
  %12 = load i32, ptr %8, align 4, !tbaa !5
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %43

16:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %17

17:                                               ; preds = %36, %16
  %18 = load i32, ptr %10, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %22, label %21

21:                                               ; preds = %17
  store i32 5, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %39

22:                                               ; preds = %17
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  %24 = load i32, ptr %8, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [10 x i32], ptr %23, i64 %25
  %27 = load i32, ptr %10, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [10 x i32], ptr %26, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = icmp ne i32 %30, 0
  br i1 %31, label %32, label %35

32:                                               ; preds = %22
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %7, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %32, %22
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %10, align 4, !tbaa !5
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %10, align 4, !tbaa !5
  br label %17, !llvm.loop !11

39:                                               ; preds = %21
  br label %40

40:                                               ; preds = %39
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %8, align 4, !tbaa !5
  br label %11, !llvm.loop !13

43:                                               ; preds = %15
  %44 = load i32, ptr %7, align 4, !tbaa !5
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %44
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local i32 @sparseRep(i32 noundef %0, i32 noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  %5 = icmp sgt i32 %1, 0
  %or.cond = and i1 %4, %5
  br i1 %or.cond, label %.preheader.us.preheader, label %._crit_edge16

.preheader.us.preheader:                          ; preds = %3
  %wide.trip.count23 = zext nneg i32 %0 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  %min.iters.check = icmp ult i32 %1, 8
  %n.vec = and i64 %wide.trip.count, 2147483640
  %cmp.n = icmp eq i64 %n.vec, %wide.trip.count
  br label %.preheader.us

.preheader.us:                                    ; preds = %.preheader.us.preheader, %._crit_edge.us
  %indvars.iv20 = phi i64 [ 0, %.preheader.us.preheader ], [ %indvars.iv.next21, %._crit_edge.us ]
  %.01114.us = phi i32 [ 0, %.preheader.us.preheader ], [ %spec.select.us.lcssa, %._crit_edge.us ]
  br i1 %min.iters.check, label %scalar.ph.preheader, label %vector.ph

vector.ph:                                        ; preds = %.preheader.us
  %6 = insertelement <4 x i32> <i32 poison, i32 0, i32 0, i32 0>, i32 %.01114.us, i64 0
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %6, %vector.ph ], [ %13, %vector.body ]
  %vec.phi25 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %14, %vector.body ]
  %7 = getelementptr inbounds [10 x i32], ptr %2, i64 %indvars.iv20, i64 %index
  %8 = getelementptr inbounds i8, ptr %7, i64 16
  %wide.load = load <4 x i32>, ptr %7, align 4, !tbaa !5
  %wide.load26 = load <4 x i32>, ptr %8, align 4, !tbaa !5
  %9 = icmp ne <4 x i32> %wide.load, zeroinitializer
  %10 = icmp ne <4 x i32> %wide.load26, zeroinitializer
  %11 = zext <4 x i1> %9 to <4 x i32>
  %12 = zext <4 x i1> %10 to <4 x i32>
  %13 = add <4 x i32> %vec.phi, %11
  %14 = add <4 x i32> %vec.phi25, %12
  %index.next = add nuw i64 %index, 8
  %15 = icmp eq i64 %index.next, %n.vec
  br i1 %15, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %14, %13
  %16 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  br i1 %cmp.n, label %._crit_edge.us, label %scalar.ph.preheader

scalar.ph.preheader:                              ; preds = %middle.block, %.preheader.us
  %indvars.iv.ph = phi i64 [ 0, %.preheader.us ], [ %n.vec, %middle.block ]
  %.112.us.ph = phi i32 [ %.01114.us, %.preheader.us ], [ %16, %middle.block ]
  br label %scalar.ph

scalar.ph:                                        ; preds = %scalar.ph.preheader, %scalar.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %scalar.ph ], [ %indvars.iv.ph, %scalar.ph.preheader ]
  %.112.us = phi i32 [ %spec.select.us, %scalar.ph ], [ %.112.us.ph, %scalar.ph.preheader ]
  %17 = getelementptr inbounds [10 x i32], ptr %2, i64 %indvars.iv20, i64 %indvars.iv
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %.not.us = icmp ne i32 %18, 0
  %19 = zext i1 %.not.us to i32
  %spec.select.us = add nsw i32 %.112.us, %19
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge.us, label %scalar.ph, !llvm.loop !13

._crit_edge.us:                                   ; preds = %scalar.ph, %middle.block
  %spec.select.us.lcssa = phi i32 [ %16, %middle.block ], [ %spec.select.us, %scalar.ph ]
  %indvars.iv.next21 = add nuw nsw i64 %indvars.iv20, 1
  %exitcond24.not = icmp eq i64 %indvars.iv.next21, %wide.trip.count23
  br i1 %exitcond24.not, label %._crit_edge16, label %.preheader.us, !llvm.loop !14

._crit_edge16:                                    ; preds = %._crit_edge.us, %3
  %.011.lcssa = phi i32 [ 0, %3 ], [ %spec.select.us.lcssa, %._crit_edge.us ]
  ret i32 %.011.lcssa
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}
!14 = distinct !{!14, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass