; LLVM IR from ippeb/ACM-ICPC :: computational_geometry/line_line_intersection (line_line_intersection)

; 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.line = type { double, double, double }

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z9parallelQ4lineS_(ptr noundef byval(%struct.line) align 8, ptr noundef byval(%struct.line) align 8) #0

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

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z10same_lineQ4lineS_(ptr noundef byval(%struct.line) align 8 %0, ptr noundef byval(%struct.line) align 8 %1) #0 {
  %3 = alloca %struct.line, align 8
  %4 = alloca %struct.line, align 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %3, ptr align 8 %0, i64 24, i1 false), !tbaa.struct !5
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %4, ptr align 8 %1, i64 24, i1 false), !tbaa.struct !5
  %5 = call noundef zeroext i1 @_Z9parallelQ4lineS_(ptr noundef byval(%struct.line) align 8 %3, ptr noundef byval(%struct.line) align 8 %4)
  br i1 %5, label %6, label %14

6:                                                ; preds = %2
  %7 = getelementptr inbounds %struct.line, ptr %0, i32 0, i32 2
  %8 = load double, ptr %7, align 8, !tbaa !10
  %9 = getelementptr inbounds %struct.line, ptr %1, i32 0, i32 2
  %10 = load double, ptr %9, align 8, !tbaa !10
  %11 = fsub double %8, %10
  %12 = call noundef double @_ZSt3absd(double noundef %11)
  %13 = fcmp ole double %12, 0x3E7AD7F29ABCAF48
  br label %14

14:                                               ; preds = %6, %2
  %15 = phi i1 [ false, %2 ], [ %13, %6 ]
  ret i1 %15
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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 = { 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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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 = !{i64 0, i64 8, !6, i64 8, i64 8, !6, i64 16, i64 8, !6}
!6 = !{!7, !7, i64 0}
!7 = !{!"double", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!11, !7, i64 16}
!11 = !{!"_ZTS4line", !7, i64 0, !7, i64 8, !7, i64 16}


; 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"

%struct.line = type { double, double, double }

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z9parallelQ4lineS_(ptr noundef byval(%struct.line) align 8, ptr noundef byval(%struct.line) align 8) local_unnamed_addr #0

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

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z10same_lineQ4lineS_(ptr nocapture noundef readonly byval(%struct.line) align 8 %0, ptr nocapture noundef readonly byval(%struct.line) align 8 %1) local_unnamed_addr #0 {
  %3 = tail call noundef zeroext i1 @_Z9parallelQ4lineS_(ptr noundef nonnull byval(%struct.line) align 8 %0, ptr noundef nonnull byval(%struct.line) align 8 %1)
  br i1 %3, label %4, label %12

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load double, ptr %5, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %1, i64 16
  %8 = load double, ptr %7, align 8, !tbaa !5
  %9 = fsub double %6, %8
  %10 = tail call noundef double @_ZSt3absd(double noundef %9)
  %11 = fcmp ole double %10, 0x3E7AD7F29ABCAF48
  br label %12

12:                                               ; preds = %4, %2
  %13 = phi i1 [ false, %2 ], [ %11, %4 ]
  ret i1 %13
}

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 = { 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" }

!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 16}
!6 = !{!"_ZTS4line", !7, i64 0, !7, i64 8, !7, i64 16}
!7 = !{!"double", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}


; Effective O3 passes: DSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,TailCallElimPass