; LLVM IR from div-bargali/Data-Structures-and-Algorithms :: C++/Algorithms/Greedy-Algorithms/Fractional Knapsack.ll (Z7compare4ItemS_)

; 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.Item = type { i32, i32 }

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z7compare4ItemS_(i64 %0, i64 %1) #0 {
  %3 = alloca %struct.Item, align 4
  %4 = alloca %struct.Item, align 4
  %5 = alloca float, align 4
  %6 = alloca float, align 4
  store i64 %0, ptr %3, align 4
  store i64 %1, ptr %4, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %7 = getelementptr inbounds %struct.Item, ptr %3, i32 0, i32 0
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sitofp i32 %8 to float
  %10 = getelementptr inbounds %struct.Item, ptr %3, i32 0, i32 1
  %11 = load i32, ptr %10, align 4, !tbaa !10
  %12 = sitofp i32 %11 to float
  %13 = fdiv float %9, %12
  store float %13, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %14 = getelementptr inbounds %struct.Item, ptr %4, i32 0, i32 0
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = sitofp i32 %15 to float
  %17 = getelementptr inbounds %struct.Item, ptr %4, i32 0, i32 1
  %18 = load i32, ptr %17, align 4, !tbaa !10
  %19 = sitofp i32 %18 to float
  %20 = fdiv float %16, %19
  store float %20, ptr %6, align 4, !tbaa !11
  %21 = load float, ptr %5, align 4, !tbaa !11
  %22 = load float, ptr %6, align 4, !tbaa !11
  %23 = fcmp ogt float %21, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i1 %23
}

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

; 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 }

!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 = !{!"_ZTS4Item", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 4}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !8, 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 nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef zeroext i1 @_Z7compare4ItemS_(i64 %0, i64 %1) local_unnamed_addr #0 {
  %3 = insertelement <2 x i64> poison, i64 %0, i64 0
  %4 = insertelement <2 x i64> %3, i64 %1, i64 1
  %5 = trunc <2 x i64> %4 to <2 x i32>
  %6 = lshr <2 x i64> %4, <i64 32, i64 32>
  %7 = trunc nuw <2 x i64> %6 to <2 x i32>
  %8 = sitofp <2 x i32> %5 to <2 x float>
  %9 = sitofp <2 x i32> %7 to <2 x float>
  %10 = fdiv <2 x float> %8, %9
  %11 = extractelement <2 x float> %10, i64 0
  %12 = extractelement <2 x float> %10, i64 1
  %13 = fcmp ogt float %11, %12
  ret i1 %13
}

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" }

!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: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass