; LLVM IR from KhawajaAbaid/machine-learning-in-c :: linear_regression (fit)

; 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"

%struct.regressor = type { double, double }

@.str = external hidden unnamed_addr constant [50 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 double @train_step(ptr noundef, ptr noundef, double noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @fit(ptr noundef %0, ptr noundef %1, double noundef %2, i64 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca double, align 8
  %8 = alloca i64, align 8
  %9 = alloca double, align 8
  %10 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store double %2, ptr %7, align 8, !tbaa !9
  store i64 %3, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  store i64 0, ptr %10, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %32, %4
  %12 = load i64, ptr %10, align 8, !tbaa !11
  %13 = load i64, ptr %8, align 8, !tbaa !11
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %35

16:                                               ; preds = %11
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = load double, ptr %7, align 8, !tbaa !9
  %20 = call double @train_step(ptr noundef %17, ptr noundef %18, double noundef %19)
  store double %20, ptr %9, align 8, !tbaa !9
  %21 = load i64, ptr %10, align 8, !tbaa !11
  %22 = add i64 %21, 1
  %23 = load i64, ptr %8, align 8, !tbaa !11
  %24 = load double, ptr %9, align 8, !tbaa !9
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.regressor, ptr %25, i32 0, i32 0
  %27 = load double, ptr %26, align 8, !tbaa !13
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.regressor, ptr %28, i32 0, i32 1
  %30 = load double, ptr %29, align 8, !tbaa !15
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str, i64 noundef %22, i64 noundef %23, double noundef %24, double noundef %27, double noundef %30)
  br label %32

32:                                               ; preds = %16
  %33 = load i64, ptr %10, align 8, !tbaa !11
  %34 = add i64 %33, 1
  store i64 %34, ptr %10, align 8, !tbaa !11
  br label %11, !llvm.loop !16

35:                                               ; preds = %15
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  ret void
}

declare i32 @printf(ptr noundef, ...) #2

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 = { "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 = { 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 = !{!"double", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!14, !10, i64 0}
!14 = !{!"", !10, i64 0, !10, i64 8}
!15 = !{!14, !10, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"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 [50 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local double @train_step(ptr noundef, ptr noundef, double noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @fit(ptr noundef %0, ptr noundef %1, double noundef %2, i64 noundef %3) local_unnamed_addr #0 {
  %.not = icmp eq i64 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  br label %6

._crit_edge:                                      ; preds = %6, %4
  ret void

6:                                                ; preds = %.lr.ph, %6
  %.011 = phi i64 [ 0, %.lr.ph ], [ %8, %6 ]
  %7 = tail call double @train_step(ptr noundef %0, ptr noundef %1, double noundef %2)
  %8 = add nuw i64 %.011, 1
  %9 = load double, ptr %0, align 8, !tbaa !5
  %10 = load double, ptr %5, align 8, !tbaa !10
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %8, i64 noundef %3, double noundef %7, double noundef %9, double noundef %10)
  %exitcond.not = icmp eq i64 %8, %3
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !11
}

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) 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 = { 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" }

!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, !7, i64 0}
!6 = !{!"", !7, i64 0, !7, i64 8}
!7 = !{!"double", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass