; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 1/Graphs/KNIGHTSTOUR.ll (Z7solveKTv)

; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@__const._Z7solveKTv.xMove = external hidden unnamed_addr constant [8 x i32], align 16
@__const._Z7solveKTv.yMove = external hidden unnamed_addr constant [8 x i32], align 16
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13printSolutionPA8_i(ptr noundef) #0

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7solveKTv() #0 {
  %1 = alloca i32, align 4
  %2 = alloca [8 x [8 x i32]], align 16
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca [8 x i32], align 16
  %7 = alloca [8 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 256, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %28, %0
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp slt i32 %9, 8
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %31

12:                                               ; preds = %8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %24, %12
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = icmp slt i32 %14, 8
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %27

17:                                               ; preds = %13
  %18 = load i32, ptr %3, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [8 x [8 x i32]], ptr %2, i64 0, i64 %19
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [8 x i32], ptr %20, i64 0, i64 %22
  store i32 -1, ptr %23, align 4, !tbaa !5
  br label %24

24:                                               ; preds = %17
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %5, align 4, !tbaa !5
  br label %13, !llvm.loop !9

27:                                               ; preds = %16
  br label %28

28:                                               ; preds = %27
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %3, align 4, !tbaa !5
  br label %8, !llvm.loop !11

31:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 32, ptr %6) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %6, ptr align 16 @__const._Z7solveKTv.xMove, i64 32, i1 false)
  call void @llvm.lifetime.start.p0(i64 32, ptr %7) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %7, ptr align 16 @__const._Z7solveKTv.yMove, i64 32, i1 false)
  %32 = getelementptr inbounds [8 x [8 x i32]], ptr %2, i64 0, i64 0
  %33 = getelementptr inbounds [8 x i32], ptr %32, i64 0, i64 0
  store i32 0, ptr %33, align 16, !tbaa !5
  %34 = getelementptr inbounds [8 x [8 x i32]], ptr %2, i64 0, i64 0
  %35 = getelementptr inbounds [8 x i32], ptr %6, i64 0, i64 0
  %36 = getelementptr inbounds [8 x i32], ptr %7, i64 0, i64 0
  %37 = call noundef i32 @_Z11solveKTUtiliiiPA8_iPiS1_(i32 noundef 0, i32 noundef 0, i32 noundef 1, ptr noundef %34, ptr noundef %35, ptr noundef %36)
  %38 = icmp eq i32 %37, 0
  br i1 %38, label %39, label %41

39:                                               ; preds = %31
  %40 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.1)
  store i32 0, ptr %1, align 4
  store i32 1, ptr %4, align 4
  br label %44

41:                                               ; preds = %31
  %42 = getelementptr inbounds [8 x [8 x i32]], ptr %2, i64 0, i64 0
  call void @_Z13printSolutionPA8_i(ptr noundef %42)
  br label %43

43:                                               ; preds = %41
  store i32 1, ptr %1, align 4
  store i32 1, ptr %4, align 4
  br label %44

44:                                               ; preds = %43, %39
  call void @llvm.lifetime.end.p0(i64 32, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 256, ptr %2) #4
  %45 = load i32, ptr %1, align 4
  ret i32 %45
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z11solveKTUtiliiiPA8_iPiS1_(i32 noundef, i32 noundef, i32 noundef, ptr noundef, ptr noundef, ptr noundef) #0

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@__const._Z7solveKTv.xMove = external hidden unnamed_addr constant [8 x i32], align 16
@__const._Z7solveKTv.yMove = external hidden unnamed_addr constant [8 x i32], align 16
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z13printSolutionPA8_i(ptr noundef) local_unnamed_addr #0

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z7solveKTv() local_unnamed_addr #0 {
  %1 = alloca [8 x [8 x i32]], align 16
  %2 = alloca [8 x i32], align 16
  %3 = alloca [8 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 256, ptr nonnull %1) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(256) %1, i8 -1, i64 256, i1 false), !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %2) #5
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(32) %2, ptr noundef nonnull align 16 dereferenceable(32) @__const._Z7solveKTv.xMove, i64 32, i1 false)
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #5
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(32) %3, ptr noundef nonnull align 16 dereferenceable(32) @__const._Z7solveKTv.yMove, i64 32, i1 false)
  store i32 0, ptr %1, align 16, !tbaa !5
  %4 = call noundef i32 @_Z11solveKTUtiliiiPA8_iPiS1_(i32 noundef 0, i32 noundef 0, i32 noundef 1, ptr noundef nonnull %1, ptr noundef nonnull %2, ptr noundef nonnull %3)
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %6, label %8

6:                                                ; preds = %0
  %7 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.1)
  br label %9

8:                                                ; preds = %0
  call void @_Z13printSolutionPA8_i(ptr noundef nonnull %1)
  br label %9

9:                                                ; preds = %8, %6
  %.08 = phi i32 [ 0, %6 ], [ 1, %8 ]
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 256, ptr nonnull %1) #5
  ret i32 %.08
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z11solveKTUtiliiiPA8_iPiS1_(i32 noundef, i32 noundef, i32 noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,SROAPass,SimplifyCFGPass