; LLVM IR from AlgoGenesis/C :: Graph Algorithms/Graph-coloring (program)

; 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"

@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [54 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [25 x i8], align 1

; 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 zeroext i1 @graphColoringUtil(ptr noundef, i32 noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @graphColoring(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca [4 x i32], align 16
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 16, ptr %6) #4
  call void @llvm.memset.p0.i64(ptr align 16 %6, i8 0, i64 16, i1 false)
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = getelementptr inbounds [4 x i32], ptr %6, i64 0, i64 0
  %12 = call zeroext i1 @graphColoringUtil(ptr noundef %9, i32 noundef %10, ptr noundef %11, i32 noundef 0)
  br i1 %12, label %15, label %13

13:                                               ; preds = %2
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %32

15:                                               ; preds = %2
  %16 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %28, %15
  %18 = load i32, ptr %8, align 4, !tbaa !9
  %19 = icmp slt i32 %18, 4
  br i1 %19, label %21, label %20

20:                                               ; preds = %17
  store i32 2, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %31

21:                                               ; preds = %17
  %22 = load i32, ptr %8, align 4, !tbaa !9
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [4 x i32], ptr %6, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %22, i32 noundef %26)
  br label %28

28:                                               ; preds = %21
  %29 = load i32, ptr %8, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %8, align 4, !tbaa !9
  br label %17, !llvm.loop !11

31:                                               ; preds = %20
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %32

32:                                               ; preds = %31, %13
  call void @llvm.lifetime.end.p0(i64 16, ptr %6) #4
  %33 = load i1, ptr %3, align 1
  ret i1 %33
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

declare i32 @printf(ptr noundef, ...) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { "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 #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 = !{!"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 = 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"

@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [54 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [25 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 zeroext i1 @graphColoringUtil(ptr noundef, i32 noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @graphColoring(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca [4 x i32], align 16
  call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %3) #4
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) %3, i8 0, i64 16, i1 false)
  %4 = call zeroext i1 @graphColoringUtil(ptr noundef %0, i32 noundef %1, ptr noundef nonnull %3, i32 noundef 0)
  br i1 %4, label %.loopexit.loopexit, label %5

5:                                                ; preds = %2
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %.loopexit

.loopexit.loopexit:                               ; preds = %2
  %7 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  %8 = load i32, ptr %3, align 16, !tbaa !5
  %9 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef 0, i32 noundef %8)
  %10 = getelementptr inbounds i8, ptr %3, i64 4
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef 1, i32 noundef %11)
  %13 = getelementptr inbounds i8, ptr %3, i64 8
  %14 = load i32, ptr %13, align 8, !tbaa !5
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef 2, i32 noundef %14)
  %16 = getelementptr inbounds i8, ptr %3, i64 12
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef 3, i32 noundef %17)
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.loopexit, %5
  call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %3) #4
  ret i1 %4
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nofree nounwind "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 #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/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass