; LLVM IR from InsightSoftwareConsortium/ITK :: Modules/ThirdParty/VNL/src/vxl/v3p/netlib/linalg/lsmrBase.ll (ZNK8lsmrBase6D2NormEdd)

; 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: nounwind
declare double @sqrt(double noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_ZNK8lsmrBase6D2NormEdd(ptr noundef nonnull align 8 dereferenceable(136) %0, double noundef %1, double noundef %2) #1 align 2 {
  %4 = alloca double, align 8
  %5 = alloca ptr, align 8
  %6 = alloca double, align 8
  %7 = alloca double, align 8
  %8 = alloca double, align 8
  %9 = alloca double, align 8
  %10 = alloca i32, align 4
  %11 = alloca double, align 8
  %12 = alloca double, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store double %1, ptr %6, align 8, !tbaa !9
  store double %2, ptr %7, align 8, !tbaa !9
  %13 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  %14 = load double, ptr %6, align 8, !tbaa !9
  %15 = call noundef double @_ZSt3absd(double noundef %14)
  %16 = load double, ptr %7, align 8, !tbaa !9
  %17 = call noundef double @_ZSt3absd(double noundef %16)
  %18 = fadd double %15, %17
  store double %18, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  store double 0.000000e+00, ptr %9, align 8, !tbaa !9
  %19 = load double, ptr %8, align 8, !tbaa !9
  %20 = fcmp oeq double %19, 0.000000e+00
  br i1 %20, label %21, label %22

21:                                               ; preds = %3
  store double 0.000000e+00, ptr %4, align 8
  store i32 1, ptr %10, align 4
  br label %38

22:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #5
  %23 = load double, ptr %6, align 8, !tbaa !9
  %24 = load double, ptr %8, align 8, !tbaa !9
  %25 = fdiv double %23, %24
  store double %25, ptr %11, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #5
  %26 = load double, ptr %7, align 8, !tbaa !9
  %27 = load double, ptr %8, align 8, !tbaa !9
  %28 = fdiv double %26, %27
  store double %28, ptr %12, align 8, !tbaa !9
  %29 = load double, ptr %8, align 8, !tbaa !9
  %30 = load double, ptr %11, align 8, !tbaa !9
  %31 = load double, ptr %11, align 8, !tbaa !9
  %32 = load double, ptr %12, align 8, !tbaa !9
  %33 = load double, ptr %12, align 8, !tbaa !9
  %34 = fmul double %32, %33
  %35 = call double @llvm.fmuladd.f64(double %30, double %31, double %34)
  %36 = call double @sqrt(double noundef %35) #5
  %37 = fmul double %29, %36
  store double %37, ptr %4, align 8
  store i32 1, ptr %10, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #5
  br label %38

38:                                               ; preds = %22, %21
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  %39 = load double, ptr %4, align 8
  ret double %39
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { 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 #1 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint mustprogress 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 #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}


; 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 nounwind uwtable
define dso_local noundef double @_ZNK8lsmrBase6D2NormEdd(ptr nocapture noundef nonnull readnone align 8 dereferenceable(136) %0, double noundef %1, double noundef %2) local_unnamed_addr #0 align 2 {
  %4 = tail call noundef double @_ZSt3absd(double noundef %1)
  %5 = tail call noundef double @_ZSt3absd(double noundef %2)
  %6 = fadd double %4, %5
  %7 = fcmp oeq double %6, 0.000000e+00
  br i1 %7, label %14, label %8

8:                                                ; preds = %3
  %9 = fdiv double %1, %6
  %10 = fdiv double %2, %6
  %11 = fmul double %10, %10
  %12 = tail call double @llvm.fmuladd.f64(double %9, double %9, double %11)
  %sqrt = tail call double @llvm.sqrt.f64(double %12)
  %13 = fmul double %6, %sqrt
  br label %14

14:                                               ; preds = %3, %8
  %.0 = phi double [ %13, %8 ], [ 0.000000e+00, %3 ]
  ret double %.0
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef double @_ZSt3absd(double noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.sqrt.f64(double) #3

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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)"}


; Effective O3 passes: AggressiveInstCombinePass,GlobalOptPass,InferFunctionAttrsPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass