; LLVM IR from xergioalex/analysisOfSortAlgorithms :: algorithms/c (benchmark)

; 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.readNumbersFromFile.filename = external hidden unnamed_addr constant [26 x i8], align 16
@.str.5 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 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

declare noalias ptr @fopen(ptr noundef, ptr noundef) #1

declare i32 @fclose(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @readNumbersFromFile(i32 noundef %0, ptr noundef %1) #2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca [26 x i8], align 16
  %7 = alloca [1000 x i8], align 16
  %8 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 26, ptr %6) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %6, ptr align 16 @__const.readNumbersFromFile.filename, i64 26, i1 false)
  call void @llvm.lifetime.start.p0(i64 1000, ptr %7) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %9 = getelementptr inbounds [26 x i8], ptr %6, i64 0, i64 0
  %10 = call noalias ptr @fopen(ptr noundef %9, ptr noundef @.str.5)
  store ptr %10, ptr %8, align 8, !tbaa !9
  %11 = load ptr, ptr %8, align 8, !tbaa !9
  %12 = icmp ne ptr %11, null
  br i1 %12, label %13, label %37

13:                                               ; preds = %2
  br label %14

14:                                               ; preds = %25, %13
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %18, label %23

18:                                               ; preds = %14
  %19 = load ptr, ptr %8, align 8, !tbaa !9
  %20 = getelementptr inbounds [1000 x i8], ptr %7, i64 0, i64 0
  %21 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef %19, ptr noundef @.str.6, ptr noundef %20)
  %22 = icmp ne i32 %21, -1
  br label %23

23:                                               ; preds = %18, %14
  %24 = phi i1 [ false, %14 ], [ %22, %18 ]
  br i1 %24, label %25, label %34

25:                                               ; preds = %23
  %26 = getelementptr inbounds [1000 x i8], ptr %7, i64 0, i64 0
  %27 = call i32 @atoi(ptr noundef %26) #6
  %28 = load ptr, ptr %4, align 8, !tbaa !9
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i32, ptr %28, i64 %30
  store i32 %27, ptr %31, align 4, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %5, align 4, !tbaa !5
  br label %14, !llvm.loop !11

34:                                               ; preds = %23
  %35 = load ptr, ptr %8, align 8, !tbaa !9
  %36 = call i32 @fclose(ptr noundef %35)
  br label %37

37:                                               ; preds = %34, %2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 1000, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 26, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  ret void
}

; 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

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) #1

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #4

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 = { inlinehint nounwind willreturn memory(read) 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 #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(read) }

!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"

@__const.readNumbersFromFile.filename = external hidden unnamed_addr constant [26 x i8], align 16
@.str.5 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [3 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: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @readNumbersFromFile(i32 noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #2 {
  %3 = alloca [1000 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 1000, ptr nonnull %3) #5
  %4 = tail call noalias ptr @fopen(ptr noundef nonnull @__const.readNumbersFromFile.filename, ptr noundef nonnull @.str.5)
  %.not = icmp eq ptr %4, null
  br i1 %.not, label %11, label %.preheader

.preheader:                                       ; preds = %2
  %5 = icmp sgt i32 %0, 0
  br i1 %5, label %.lr.ph.preheader, label %.critedge

.lr.ph.preheader:                                 ; preds = %.preheader
  %wide.trip.count = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %7
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %7 ]
  %6 = call i32 (ptr, ptr, ...) @__isoc99_fscanf(ptr noundef nonnull %4, ptr noundef nonnull @.str.6, ptr noundef nonnull %3) #5
  %.not7 = icmp eq i32 %6, -1
  br i1 %.not7, label %.critedge, label %7

7:                                                ; preds = %.lr.ph
  %8 = call i32 @atoi(ptr nocapture noundef %3) #6
  %9 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  store i32 %8, ptr %9, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.critedge, label %.lr.ph, !llvm.loop !9

.critedge:                                        ; preds = %.lr.ph, %7, %.preheader
  %10 = call i32 @fclose(ptr noundef nonnull %4)
  br label %11

11:                                               ; preds = %.critedge, %2
  call void @llvm.lifetime.end.p0(i64 1000, ptr nonnull %3) #5
  ret void
}

declare i32 @__isoc99_fscanf(ptr noundef, ptr noundef, ...) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #4

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(read) }

!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: EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass