; LLVM IR from KhawajaAbaid/machine-learning-in-c :: linalg (vector_scalar_product)

; 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"

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

; Function Attrs: nounwind allocsize(0,1)
declare noalias ptr @calloc(i64 noundef, i64 noundef) #1

; 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
define dso_local ptr @vector_scalar_product(ptr noundef %0, double noundef %1, i64 noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca double, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store double %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %9 = load i64, ptr %6, align 8, !tbaa !11
  %10 = call noalias ptr @calloc(i64 noundef %9, i64 noundef 8) #4
  store ptr %10, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %26, %3
  %12 = load i64, ptr %8, align 8, !tbaa !11
  %13 = load i64, ptr %6, 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 %8) #3
  br label %29

16:                                               ; preds = %11
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %8, align 8, !tbaa !11
  %19 = getelementptr inbounds double, ptr %17, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !9
  %21 = load double, ptr %5, align 8, !tbaa !9
  %22 = fmul double %20, %21
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load i64, ptr %8, align 8, !tbaa !11
  %25 = getelementptr inbounds double, ptr %23, i64 %24
  store double %22, ptr %25, align 8, !tbaa !9
  br label %26

26:                                               ; preds = %16
  %27 = load i64, ptr %8, align 8, !tbaa !11
  %28 = add i64 %27, 1
  store i64 %28, ptr %8, align 8, !tbaa !11
  br label %11, !llvm.loop !13

29:                                               ; preds = %15
  %30 = load ptr, ptr %7, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  ret ptr %30
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(0,1) "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 = { nounwind }
attributes #4 = { nounwind allocsize(0,1) }

!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 = distinct !{!13, !14}
!14 = !{!"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"

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind memory(write, argmem: read, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @vector_scalar_product(ptr nocapture noundef readonly %0, double noundef %1, i64 noundef %2) local_unnamed_addr #1 {
  %4 = tail call noalias ptr @calloc(i64 noundef %2, i64 noundef 8) #2
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %min.iters.check = icmp ult i64 %2, 4
  br i1 %min.iters.check, label %.lr.ph.preheader11, label %vector.ph

.lr.ph.preheader11:                               ; preds = %middle.block, %.lr.ph.preheader
  %.09.ph = phi i64 [ 0, %.lr.ph.preheader ], [ %n.vec, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %2, -4
  %broadcast.splatinsert = insertelement <2 x double> poison, double %1, i64 0
  %broadcast.splat = shufflevector <2 x double> %broadcast.splatinsert, <2 x double> poison, <2 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %5 = getelementptr inbounds double, ptr %0, i64 %index
  %6 = getelementptr inbounds i8, ptr %5, i64 16
  %wide.load = load <2 x double>, ptr %5, align 8, !tbaa !5
  %wide.load10 = load <2 x double>, ptr %6, align 8, !tbaa !5
  %7 = fmul <2 x double> %wide.load, %broadcast.splat
  %8 = fmul <2 x double> %wide.load10, %broadcast.splat
  %9 = getelementptr inbounds double, ptr %4, i64 %index
  %10 = getelementptr inbounds i8, ptr %9, i64 16
  store <2 x double> %7, ptr %9, align 8, !tbaa !5
  store <2 x double> %8, ptr %10, align 8, !tbaa !5
  %index.next = add nuw i64 %index, 4
  %11 = icmp eq i64 %index.next, %n.vec
  br i1 %11, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.vec, %2
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader11

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %3
  ret ptr %4

.lr.ph:                                           ; preds = %.lr.ph.preheader11, %.lr.ph
  %.09 = phi i64 [ %16, %.lr.ph ], [ %.09.ph, %.lr.ph.preheader11 ]
  %12 = getelementptr inbounds double, ptr %0, i64 %.09
  %13 = load double, ptr %12, align 8, !tbaa !5
  %14 = fmul double %13, %1
  %15 = getelementptr inbounds double, ptr %4, i64 %.09
  store double %14, ptr %15, align 8, !tbaa !5
  %16 = add nuw i64 %.09, 1
  %exitcond.not = icmp eq i64 %16, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13
}

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 memory(write, argmem: read, inaccessiblemem: readwrite) 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 = { nounwind allocsize(0,1) }

!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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass