; LLVM IR from QiaoLiuHit/LSOTB-TIR :: vlfeat-0.9.19/vl/mathop.ll (vl_kernel_chi2_d)

; 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: 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 double @_vl_kernel_chi2_d(i64 noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca double, align 8
  %9 = alloca double, align 8
  %10 = alloca double, align 8
  %11 = alloca double, align 8
  %12 = alloca double, align 8
  %13 = alloca double, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %14 = load ptr, ptr %5, align 8, !tbaa !9
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds double, ptr %14, i64 %15
  store ptr %16, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store double 0.000000e+00, ptr %8, align 8, !tbaa !11
  br label %17

17:                                               ; preds = %44, %3
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load ptr, ptr %7, align 8, !tbaa !9
  %20 = icmp ult ptr %18, %19
  br i1 %20, label %21, label %45

21:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = getelementptr inbounds double, ptr %22, i32 1
  store ptr %23, ptr %5, align 8, !tbaa !9
  %24 = load double, ptr %22, align 8, !tbaa !11
  store double %24, ptr %9, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %25 = load ptr, ptr %6, align 8, !tbaa !9
  %26 = getelementptr inbounds double, ptr %25, i32 1
  store ptr %26, ptr %6, align 8, !tbaa !9
  %27 = load double, ptr %25, align 8, !tbaa !11
  store double %27, ptr %10, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %28 = load double, ptr %9, align 8, !tbaa !11
  %29 = load double, ptr %10, align 8, !tbaa !11
  %30 = fadd double %28, %29
  store double %30, ptr %11, align 8, !tbaa !11
  %31 = load double, ptr %11, align 8, !tbaa !11
  %32 = fcmp une double %31, 0.000000e+00
  br i1 %32, label %33, label %44

33:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  %34 = load double, ptr %9, align 8, !tbaa !11
  %35 = fmul double 2.000000e+00, %34
  %36 = load double, ptr %10, align 8, !tbaa !11
  %37 = fmul double %35, %36
  store double %37, ptr %12, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %13) #2
  %38 = load double, ptr %12, align 8, !tbaa !11
  %39 = load double, ptr %11, align 8, !tbaa !11
  %40 = fdiv double %38, %39
  store double %40, ptr %13, align 8, !tbaa !11
  %41 = load double, ptr %13, align 8, !tbaa !11
  %42 = load double, ptr %8, align 8, !tbaa !11
  %43 = fadd double %42, %41
  store double %43, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %13) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  br label %44

44:                                               ; preds = %33, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  br label %17, !llvm.loop !13

45:                                               ; preds = %17
  %46 = load double, ptr %8, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret double %46
}

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 = { 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 = !{!"long long", !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 = !{!12, !12, i64 0}
!12 = !{!"double", !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: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local double @_vl_kernel_chi2_d(i64 noundef %0, ptr noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds double, ptr %1, i64 %0
  %5 = icmp sgt i64 %0, 0
  br i1 %5, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.020 = phi ptr [ %6, %.lr.ph ], [ %1, %3 ]
  %.01519 = phi ptr [ %8, %.lr.ph ], [ %2, %3 ]
  %.01618 = phi double [ %.1, %.lr.ph ], [ 0.000000e+00, %3 ]
  %6 = getelementptr inbounds i8, ptr %.020, i64 8
  %7 = load double, ptr %.020, align 8, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %.01519, i64 8
  %9 = load double, ptr %.01519, align 8, !tbaa !5
  %10 = fadd double %7, %9
  %11 = fcmp une double %10, 0.000000e+00
  %12 = fmul double %7, 2.000000e+00
  %13 = fmul double %12, %9
  %14 = fdiv double %13, %10
  %15 = fadd double %.01618, %14
  %.1 = select i1 %11, double %15, double %.01618
  %16 = icmp ult ptr %6, %4
  br i1 %16, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.016.lcssa = phi double [ 0.000000e+00, %3 ], [ %.1, %.lr.ph ]
  ret double %.016.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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" }

!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}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass