; LLVM IR from AlgoGenesis/C :: Backtracking Algorithms/Chess-In-Terminal/src (main)

; 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"

@__const.init_colours.tile_background_types = external hidden unnamed_addr constant [4 x i32], align 16
@__const.init_colours.tile_background_colours = external hidden unnamed_addr constant [4 x i32], align 16

; 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: 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) #1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @init_colours() #2 {
  %1 = alloca [4 x i32], align 16
  %2 = alloca [4 x i32], align 16
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 16, ptr %1) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %1, ptr align 16 @__const.init_colours.tile_background_types, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 16, ptr %2) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %2, ptr align 16 @__const.init_colours.tile_background_colours, i64 16, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %4

4:                                                ; preds = %34, %0
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = icmp ult i64 %6, 4
  br i1 %7, label %9, label %8

8:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  br label %37

9:                                                ; preds = %4
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [4 x i32], ptr %1, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = or i32 1, %13
  %15 = trunc i32 %14 to i16
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [4 x i32], ptr %2, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = trunc i32 %19 to i16
  %21 = call i32 @init_pair(i16 noundef signext %15, i16 noundef signext 4, i16 noundef signext %20)
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [4 x i32], ptr %1, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = or i32 2, %25
  %27 = trunc i32 %26 to i16
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [4 x i32], ptr %2, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = trunc i32 %31 to i16
  %33 = call i32 @init_pair(i16 noundef signext %27, i16 noundef signext 1, i16 noundef signext %32)
  br label %34

34:                                               ; preds = %9
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %3, align 4, !tbaa !5
  br label %4, !llvm.loop !9

37:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 16, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 16, ptr %1) #4
  ret i1 true
}

declare i32 @init_pair(i16 noundef signext, i16 noundef signext, i16 noundef signext) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@__const.init_colours.tile_background_types = external hidden unnamed_addr constant [4 x i32], align 16
@__const.init_colours.tile_background_colours = external hidden unnamed_addr constant [4 x i32], align 16

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @init_colours() local_unnamed_addr #0 {
  %1 = load i32, ptr @__const.init_colours.tile_background_types, align 16, !tbaa !5
  %2 = trunc i32 %1 to i16
  %3 = or i16 %2, 1
  %4 = load i32, ptr @__const.init_colours.tile_background_colours, align 16, !tbaa !5
  %5 = trunc i32 %4 to i16
  %6 = tail call i32 @init_pair(i16 noundef signext %3, i16 noundef signext 4, i16 noundef signext %5) #2
  %7 = or i16 %2, 2
  %8 = tail call i32 @init_pair(i16 noundef signext %7, i16 noundef signext 1, i16 noundef signext %5) #2
  %9 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_types, i64 4), align 4, !tbaa !5
  %10 = trunc i32 %9 to i16
  %11 = or i16 %10, 1
  %12 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_colours, i64 4), align 4, !tbaa !5
  %13 = trunc i32 %12 to i16
  %14 = tail call i32 @init_pair(i16 noundef signext %11, i16 noundef signext 4, i16 noundef signext %13) #2
  %15 = or i16 %10, 2
  %16 = tail call i32 @init_pair(i16 noundef signext %15, i16 noundef signext 1, i16 noundef signext %13) #2
  %17 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_types, i64 8), align 8, !tbaa !5
  %18 = trunc i32 %17 to i16
  %19 = or i16 %18, 1
  %20 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_colours, i64 8), align 8, !tbaa !5
  %21 = trunc i32 %20 to i16
  %22 = tail call i32 @init_pair(i16 noundef signext %19, i16 noundef signext 4, i16 noundef signext %21) #2
  %23 = or i16 %18, 2
  %24 = tail call i32 @init_pair(i16 noundef signext %23, i16 noundef signext 1, i16 noundef signext %21) #2
  %25 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_types, i64 12), align 4, !tbaa !5
  %26 = trunc i32 %25 to i16
  %27 = or i16 %26, 1
  %28 = load i32, ptr getelementptr inbounds (i8, ptr @__const.init_colours.tile_background_colours, i64 12), align 4, !tbaa !5
  %29 = trunc i32 %28 to i16
  %30 = tail call i32 @init_pair(i16 noundef signext %27, i16 noundef signext 4, i16 noundef signext %29) #2
  %31 = or i16 %26, 2
  %32 = tail call i32 @init_pair(i16 noundef signext %31, i16 noundef signext 1, i16 noundef signext %29) #2
  ret i1 true
}

declare i32 @init_pair(i16 noundef signext, i16 noundef signext, i16 noundef signext) local_unnamed_addr #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 = { "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"}


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