; LLVM IR from QuantitativeBytes/qbGradient :: qbGradient.ll (ZN10qbGradient24ComputeGradientMagnitudeESt6vectorIdSaIdEE)

; 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"

%class.qbGradient = type { i32, double, i32, double, double, %"class.std::vector", %"class.std::vector", %"class.std::function" }
%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<double, std::allocator<double>>::_Vector_impl" }
%"struct.std::_Vector_base<double, std::allocator<double>>::_Vector_impl" = type { %"struct.std::_Vector_base<double, std::allocator<double>>::_Vector_impl_data" }
%"struct.std::_Vector_base<double, std::allocator<double>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"class.std::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }

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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_ZN10qbGradient24ComputeGradientMagnitudeESt6vectorIdSaIdEE(ptr noundef nonnull align 8 dereferenceable(120) %0, ptr noundef %1) #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca double, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  store double 0.000000e+00, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %25, %2
  %9 = load i32, ptr %6, align 4, !tbaa !11
  %10 = getelementptr inbounds %class.qbGradient, ptr %7, i32 0, i32 0
  %11 = load i32, ptr %10, align 8, !tbaa !13
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %28

14:                                               ; preds = %8
  %15 = load i32, ptr %6, align 4, !tbaa !11
  %16 = sext i32 %15 to i64
  %17 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %16) #4
  %18 = load double, ptr %17, align 8, !tbaa !9
  %19 = load i32, ptr %6, align 4, !tbaa !11
  %20 = sext i32 %19 to i64
  %21 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %20) #4
  %22 = load double, ptr %21, align 8, !tbaa !9
  %23 = load double, ptr %5, align 8, !tbaa !9
  %24 = call double @llvm.fmuladd.f64(double %18, double %22, double %23)
  store double %24, ptr %5, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %14
  %26 = load i32, ptr %6, align 4, !tbaa !11
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %6, align 4, !tbaa !11
  br label %8, !llvm.loop !21

28:                                               ; preds = %13
  %29 = load double, ptr %5, align 8, !tbaa !9
  %30 = call double @sqrt(double noundef %29) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  ret double %30
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

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

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

; Function Attrs: nounwind
declare double @sqrt(double noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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 #4 = { 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}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!14, !12, i64 0}
!14 = !{!"_ZTS10qbGradient", !12, i64 0, !10, i64 8, !12, i64 16, !10, i64 24, !10, i64 32, !15, i64 40, !15, i64 64, !19, i64 88}
!15 = !{!"_ZTSSt6vectorIdSaIdEE", !16, i64 0}
!16 = !{!"_ZTSSt12_Vector_baseIdSaIdEE", !17, i64 0}
!17 = !{!"_ZTSNSt12_Vector_baseIdSaIdEE12_Vector_implE", !18, i64 0}
!18 = !{!"_ZTSNSt12_Vector_baseIdSaIdEE17_Vector_impl_dataE", !6, i64 0, !6, i64 8, !6, i64 16}
!19 = !{!"_ZTSSt8functionIFdPSt6vectorIdSaIdEEEE", !20, i64 0, !6, i64 24}
!20 = !{!"_ZTSSt14_Function_base", !7, i64 0, !6, i64 16}
!21 = distinct !{!21, !22}
!22 = !{!"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 nounwind uwtable
define dso_local noundef double @_ZN10qbGradient24ComputeGradientMagnitudeESt6vectorIdSaIdEE(ptr nocapture noundef nonnull readonly align 8 dereferenceable(120) %0, ptr noundef %1) local_unnamed_addr #0 align 2 {
  %3 = load i32, ptr %0, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.06.lcssa = phi double [ 0.000000e+00, %2 ], [ %10, %.lr.ph ]
  %5 = tail call double @sqrt(double noundef %.06.lcssa) #3
  ret double %5

.lr.ph:                                           ; preds = %2, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %2 ]
  %.067 = phi double [ %10, %.lr.ph ], [ 0.000000e+00, %2 ]
  %6 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %indvars.iv) #3
  %7 = load double, ptr %6, align 8, !tbaa !18
  %8 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %1, i64 noundef %indvars.iv) #3
  %9 = load double, ptr %8, align 8, !tbaa !18
  %10 = tail call double @llvm.fmuladd.f64(double %7, double %9, double %.067)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = load i32, ptr %0, align 8, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = icmp slt i64 %indvars.iv.next, %12
  br i1 %13, label %.lr.ph, label %._crit_edge, !llvm.loop !19
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZNSt6vectorIdSaIdEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.fmuladd.f64(double, double, double) #1

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @sqrt(double noundef) local_unnamed_addr #2

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 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { mustprogress nofree nounwind willreturn memory(write) "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, !7, i64 0}
!6 = !{!"_ZTS10qbGradient", !7, i64 0, !10, i64 8, !7, i64 16, !10, i64 24, !10, i64 32, !11, i64 40, !11, i64 64, !16, i64 88}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"double", !8, i64 0}
!11 = !{!"_ZTSSt6vectorIdSaIdEE", !12, i64 0}
!12 = !{!"_ZTSSt12_Vector_baseIdSaIdEE", !13, i64 0}
!13 = !{!"_ZTSNSt12_Vector_baseIdSaIdEE12_Vector_implE", !14, i64 0}
!14 = !{!"_ZTSNSt12_Vector_baseIdSaIdEE17_Vector_impl_dataE", !15, i64 0, !15, i64 8, !15, i64 16}
!15 = !{!"any pointer", !8, i64 0}
!16 = !{!"_ZTSSt8functionIFdPSt6vectorIdSaIdEEEE", !17, i64 0, !15, i64 24}
!17 = !{!"_ZTSSt14_Function_base", !8, i64 0, !15, i64 16}
!18 = !{!10, !10, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}


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