; LLVM IR from brpapa/algorithms :: solutions/uva/11966.ll (Z4distSt4pairIddES0_)

; 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"

%"struct.std::pair" = type { double, double }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef double @_Z4distSt4pairIddES0_(double %0, double %1, double %2, double %3) #0 {
  %5 = alloca %"struct.std::pair", align 8
  %6 = alloca %"struct.std::pair", align 8
  %7 = alloca double, align 8
  %8 = alloca double, align 8
  %9 = getelementptr inbounds { double, double }, ptr %5, i32 0, i32 0
  store double %0, ptr %9, align 8
  %10 = getelementptr inbounds { double, double }, ptr %5, i32 0, i32 1
  store double %1, ptr %10, align 8
  %11 = getelementptr inbounds { double, double }, ptr %6, i32 0, i32 0
  store double %2, ptr %11, align 8
  %12 = getelementptr inbounds { double, double }, ptr %6, i32 0, i32 1
  store double %3, ptr %12, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  %13 = getelementptr inbounds %"struct.std::pair", ptr %5, i32 0, i32 0
  %14 = load double, ptr %13, align 8, !tbaa !5
  %15 = getelementptr inbounds %"struct.std::pair", ptr %6, i32 0, i32 0
  %16 = load double, ptr %15, align 8, !tbaa !5
  %17 = fsub double %14, %16
  store double %17, ptr %7, align 8, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  %18 = getelementptr inbounds %"struct.std::pair", ptr %5, i32 0, i32 1
  %19 = load double, ptr %18, align 8, !tbaa !11
  %20 = getelementptr inbounds %"struct.std::pair", ptr %6, i32 0, i32 1
  %21 = load double, ptr %20, align 8, !tbaa !11
  %22 = fsub double %19, %21
  store double %22, ptr %8, align 8, !tbaa !10
  %23 = load double, ptr %7, align 8, !tbaa !10
  %24 = load double, ptr %7, align 8, !tbaa !10
  %25 = load double, ptr %8, align 8, !tbaa !10
  %26 = load double, ptr %8, align 8, !tbaa !10
  %27 = fmul double %25, %26
  %28 = call double @llvm.fmuladd.f64(double %23, double %24, double %27)
  %29 = call double @sqrt(double noundef %28) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  ret double %29
}

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

; Function Attrs: nounwind
declare double @sqrt(double noundef) #2

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

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

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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, !7, i64 0}
!6 = !{!"_ZTSSt4pairIddE", !7, i64 0, !7, i64 8}
!7 = !{!"double", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}
!11 = !{!6, !7, i64 8}


; 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 norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef double @_Z4distSt4pairIddES0_(double %0, double %1, double %2, double %3) local_unnamed_addr #0 {
  %5 = fsub double %0, %2
  %6 = fsub double %1, %3
  %7 = fmul double %6, %6
  %8 = tail call double @llvm.fmuladd.f64(double %5, double %5, double %7)
  %sqrt = tail call double @llvm.sqrt.f64(double %8)
  ret double %sqrt
}

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

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

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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" }
attributes #1 = { mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #2 = { 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,TailCallElimPass