; LLVM IR from FOSS-UCSC/FOSSALGO :: algorithms/ar-cochprb/c (coin_change_problem)

; 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"

@cont = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local void @coin(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr noundef %3, i32 noundef %4) #0 {
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store ptr %3, ptr %9, align 8, !tbaa !9
  store i32 %4, ptr %10, align 4, !tbaa !5
  %12 = load ptr, ptr %9, align 8, !tbaa !9
  %13 = load i32, ptr %7, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds i32, ptr %12, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = load i32, ptr %8, align 4, !tbaa !5
  %18 = add nsw i32 %17, %16
  store i32 %18, ptr %8, align 4, !tbaa !5
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp sgt i32 %19, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %5
  br label %46

23:                                               ; preds = %5
  %24 = load i32, ptr %8, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = icmp eq i32 %24, %25
  br i1 %26, label %27, label %30

27:                                               ; preds = %23
  %28 = load i32, ptr @cont, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr @cont, align 4, !tbaa !5
  br label %46

30:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %31 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %31, ptr %11, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %42, %30
  %33 = load i32, ptr %11, align 4, !tbaa !5
  %34 = load i32, ptr %10, align 4, !tbaa !5
  %35 = icmp slt i32 %33, %34
  br i1 %35, label %36, label %45

36:                                               ; preds = %32
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = load i32, ptr %11, align 4, !tbaa !5
  %39 = load i32, ptr %8, align 4, !tbaa !5
  %40 = load ptr, ptr %9, align 8, !tbaa !9
  %41 = load i32, ptr %10, align 4, !tbaa !5
  call void @coin(i32 noundef %37, i32 noundef %38, i32 noundef %39, ptr noundef %40, i32 noundef %41)
  br label %42

42:                                               ; preds = %36
  %43 = load i32, ptr %11, align 4, !tbaa !5
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %11, align 4, !tbaa !5
  br label %32, !llvm.loop !11

45:                                               ; preds = %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  br label %46

46:                                               ; preds = %45, %27, %22
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}


; 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"

@cont = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nofree nosync nounwind memory(readwrite, argmem: read, inaccessiblemem: none) uwtable
define dso_local void @coin(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr nocapture noundef readonly %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds i32, ptr %3, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = add nsw i32 %8, %2
  %10 = icmp sgt i32 %9, %0
  br i1 %10, label %.loopexit, label %11

11:                                               ; preds = %5
  %12 = icmp eq i32 %9, %0
  br i1 %12, label %14, label %.preheader

.preheader:                                       ; preds = %11
  %13 = icmp slt i32 %1, %4
  br i1 %13, label %.lr.ph, label %.loopexit

14:                                               ; preds = %11
  %15 = load i32, ptr @cont, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr @cont, align 4, !tbaa !5
  br label %.loopexit

.lr.ph:                                           ; preds = %.preheader, %.lr.ph
  %.018 = phi i32 [ %17, %.lr.ph ], [ %1, %.preheader ]
  tail call void @coin(i32 noundef %0, i32 noundef %.018, i32 noundef %9, ptr noundef %3, i32 noundef %4)
  %17 = add i32 %.018, 1
  %exitcond.not = icmp eq i32 %17, %4
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %.preheader, %5, %14
  ret void
}

attributes #0 = { nofree nosync nounwind memory(readwrite, argmem: read, 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass