; LLVM IR from ahr9n/psolving-paradigms :: 4.dynamic-programming/04.knapsack/UVa 10036 - Divisibility.ll (Z5checkii)

; 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"

@n = external dso_local global i32, align 4
@arr = external dso_local global [10001 x i32], align 16
@dp = external dso_local global [10001 x [101 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3fixi(i32 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z5checkii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr @n, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %16

11:                                               ; preds = %2
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  %14 = xor i1 %13, true
  %15 = zext i1 %14 to i32
  store i32 %15, ptr %3, align 4
  br label %54

16:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [10001 x [101 x i32]], ptr @dp, i64 0, i64 %18
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [101 x i32], ptr %19, i64 0, i64 %21
  store ptr %22, ptr %6, align 8, !tbaa !9
  %23 = load ptr, ptr %6, align 8, !tbaa !9
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = xor i32 %24, -1
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %30

27:                                               ; preds = %16
  %28 = load ptr, ptr %6, align 8, !tbaa !9
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %53

30:                                               ; preds = %16
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10001 x i32], ptr @arr, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = add nsw i32 %33, %37
  %39 = call noundef i32 @_Z3fixi(i32 noundef %38)
  %40 = call noundef i32 @_Z5checkii(i32 noundef %32, i32 noundef %39)
  %41 = load i32, ptr %4, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  %43 = load i32, ptr %5, align 4, !tbaa !5
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [10001 x i32], ptr @arr, i64 0, i64 %45
  %47 = load i32, ptr %46, align 4, !tbaa !5
  %48 = sub nsw i32 %43, %47
  %49 = call noundef i32 @_Z3fixi(i32 noundef %48)
  %50 = call noundef i32 @_Z5checkii(i32 noundef %42, i32 noundef %49)
  %51 = or i32 %40, %50
  %52 = load ptr, ptr %6, align 8, !tbaa !9
  store i32 %51, ptr %52, align 4, !tbaa !5
  store i32 %51, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %53

53:                                               ; preds = %30, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %54

54:                                               ; preds = %53, %11
  %55 = load i32, ptr %3, align 4
  ret i32 %55
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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" }
attributes #1 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@n = external dso_local local_unnamed_addr global i32, align 4
@arr = external dso_local local_unnamed_addr global [10001 x i32], align 16
@dp = external dso_local local_unnamed_addr global [10001 x [101 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3fixi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5checkii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = load i32, ptr @n, align 4, !tbaa !5
  %4 = icmp eq i32 %3, %0
  br i1 %4, label %5, label %7

5:                                                ; preds = %2
  %.not14 = icmp eq i32 %1, 0
  %6 = zext i1 %.not14 to i32
  br label %common.ret15

7:                                                ; preds = %2
  %8 = sext i32 %0 to i64
  %9 = sext i32 %1 to i64
  %10 = getelementptr inbounds [10001 x [101 x i32]], ptr @dp, i64 0, i64 %8, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %.not = icmp eq i32 %11, -1
  br i1 %.not, label %12, label %common.ret15

common.ret15:                                     ; preds = %7, %5, %12
  %common.ret15.op = phi i32 [ %23, %12 ], [ %6, %5 ], [ %11, %7 ]
  ret i32 %common.ret15.op

12:                                               ; preds = %7
  %13 = add nsw i32 %0, 1
  %14 = getelementptr inbounds [10001 x i32], ptr @arr, i64 0, i64 %8
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = add nsw i32 %15, %1
  %17 = tail call noundef i32 @_Z3fixi(i32 noundef %16)
  %18 = tail call noundef i32 @_Z5checkii(i32 noundef %13, i32 noundef %17)
  %19 = load i32, ptr %14, align 4, !tbaa !5
  %20 = sub nsw i32 %1, %19
  %21 = tail call noundef i32 @_Z3fixi(i32 noundef %20)
  %22 = tail call noundef i32 @_Z5checkii(i32 noundef %13, i32 noundef %21)
  %23 = or i32 %22, %18
  store i32 %23, ptr %10, align 4, !tbaa !5
  br label %common.ret15
}

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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass