; LLVM IR from tommasocerruti/algolab-2024 :: src/week04/first_hit (solution)

; 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: mustprogress uwtable
define dso_local noundef double @_Z15floor_to_doubleRKN4CGAL13Lazy_exact_ntIN5boost14multiprecision6numberINS2_8backends12gmp_rationalELNS2_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(9) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca double, align 8
  %4 = alloca double, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = call noundef double @_ZN4CGAL9to_doubleINS_13Lazy_exact_ntIN5boost14multiprecision6numberINS3_8backends12gmp_rationalELNS3_26expression_template_optionE1EEEEEEENS_22Real_embeddable_traitsIT_E9To_double11result_typeERKSB_(ptr noundef nonnull align 8 dereferenceable(9) %5)
  %7 = call double @llvm.floor.f64(double %6)
  store double %7, ptr %3, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %11, %1
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = call noundef zeroext i1 @_ZN5boost14operators_implgtERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(9) %9)
  br i1 %10, label %11, label %14

11:                                               ; preds = %8
  %12 = load double, ptr %3, align 8, !tbaa !9
  %13 = fsub double %12, 1.000000e+00
  store double %13, ptr %3, align 8, !tbaa !9
  br label %8, !llvm.loop !11

14:                                               ; preds = %8
  br label %15

15:                                               ; preds = %20, %14
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %16 = load double, ptr %3, align 8, !tbaa !9
  %17 = fadd double %16, 1.000000e+00
  store double %17, ptr %4, align 8, !tbaa !9
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = call noundef zeroext i1 @_ZN5boost14operators_implleERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %4, ptr noundef nonnull align 8 dereferenceable(9) %18)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br i1 %19, label %20, label %23

20:                                               ; preds = %15
  %21 = load double, ptr %3, align 8, !tbaa !9
  %22 = fadd double %21, 1.000000e+00
  store double %22, ptr %3, align 8, !tbaa !9
  br label %15, !llvm.loop !13

23:                                               ; preds = %15
  %24 = load double, ptr %3, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret double %24
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef double @_ZN4CGAL9to_doubleINS_13Lazy_exact_ntIN5boost14multiprecision6numberINS3_8backends12gmp_rationalELNS3_26expression_template_optionE1EEEEEEENS_22Real_embeddable_traitsIT_E9To_double11result_typeERKSB_(ptr noundef nonnull align 8 dereferenceable(9)) #2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost14operators_implgtERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(9)) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost14operators_implleERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(9)) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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 uwtable
define dso_local noundef double @_Z15floor_to_doubleRKN4CGAL13Lazy_exact_ntIN5boost14multiprecision6numberINS2_8backends12gmp_rationalELNS2_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(9) %0) local_unnamed_addr #0 {
  %2 = alloca double, align 8
  %3 = alloca double, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %4 = tail call noundef double @_ZN4CGAL9to_doubleINS_13Lazy_exact_ntIN5boost14multiprecision6numberINS3_8backends12gmp_rationalELNS3_26expression_template_optionE1EEEEEEENS_22Real_embeddable_traitsIT_E9To_double11result_typeERKSB_(ptr noundef nonnull align 8 dereferenceable(9) %0)
  %5 = tail call double @llvm.floor.f64(double %4)
  store double %5, ptr %2, align 8, !tbaa !5
  %6 = call noundef zeroext i1 @_ZN5boost14operators_implgtERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(9) %0)
  br i1 %6, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %1
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %7 = load double, ptr %2, align 8, !tbaa !5
  %8 = fadd double %7, 1.000000e+00
  store double %8, ptr %3, align 8, !tbaa !5
  %9 = call noundef zeroext i1 @_ZN5boost14operators_implleERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(9) %0)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  br i1 %9, label %.lr.ph3, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %10 = load double, ptr %2, align 8, !tbaa !5
  %11 = fadd double %10, -1.000000e+00
  store double %11, ptr %2, align 8, !tbaa !5
  %12 = call noundef zeroext i1 @_ZN5boost14operators_implgtERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %2, ptr noundef nonnull align 8 dereferenceable(9) %0)
  br i1 %12, label %.lr.ph, label %.preheader, !llvm.loop !9

.lr.ph3:                                          ; preds = %.preheader, %.lr.ph3
  %13 = load double, ptr %2, align 8, !tbaa !5
  %14 = fadd double %13, 1.000000e+00
  store double %14, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #4
  %15 = fadd double %14, 1.000000e+00
  store double %15, ptr %3, align 8, !tbaa !5
  %16 = call noundef zeroext i1 @_ZN5boost14operators_implleERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8) %3, ptr noundef nonnull align 8 dereferenceable(9) %0)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #4
  br i1 %16, label %.lr.ph3, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph3, %.preheader
  %17 = load double, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  ret double %17
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef double @_ZN4CGAL9to_doubleINS_13Lazy_exact_ntIN5boost14multiprecision6numberINS3_8backends12gmp_rationalELNS3_26expression_template_optionE1EEEEEEENS_22Real_embeddable_traitsIT_E9To_double11result_typeERKSB_(ptr noundef nonnull align 8 dereferenceable(9)) local_unnamed_addr #2

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

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost14operators_implgtERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(9)) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_ZN5boost14operators_implleERKdRKN4CGAL13Lazy_exact_ntINS_14multiprecision6numberINS5_8backends12gmp_rationalELNS5_26expression_template_optionE1EEEEE(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(9)) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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