; LLVM IR from freddiev4/dailyprogrammerchallenges :: Easy Challenges/Challenge 0271 Easy - Critical Hit/solutions (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: nounwind uwtable
define dso_local float @p(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca float, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp sgt i32 %6, %7
  br i1 %8, label %9, label %19

9:                                                ; preds = %2
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = sitofp i32 %10 to float
  %12 = fdiv float 1.000000e+00, %11
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sub nsw i32 %14, %15
  %17 = call float @p(i32 noundef %13, i32 noundef %16)
  %18 = fmul float %12, %17
  store float %18, ptr %3, align 4
  br label %29

19:                                               ; preds = %2
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sitofp i32 %20 to float
  %22 = fdiv float 1.000000e+00, %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sub nsw i32 %23, %24
  %26 = add nsw i32 %25, 1
  %27 = sitofp i32 %26 to float
  %28 = fmul float %22, %27
  store float %28, ptr %3, align 4
  br label %29

29:                                               ; preds = %19, %9
  %30 = load float, ptr %3, align 4
  ret float %30
}

attributes #0 = { 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; 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: nofree nosync nounwind memory(none) uwtable
define dso_local float @p(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, %0
  br i1 %3, label %7, label %10

common.ret:                                       ; preds = %10, %7
  %.sink = phi float [ %13, %10 ], [ %9, %7 ]
  %4 = sitofp i32 %0 to float
  %5 = fdiv float 1.000000e+00, %4
  %6 = fmul float %5, %.sink
  ret float %6

7:                                                ; preds = %2
  %8 = sub nsw i32 %1, %0
  %9 = tail call float @p(i32 noundef %0, i32 noundef %8)
  br label %common.ret

10:                                               ; preds = %2
  %11 = add i32 %0, 1
  %12 = sub i32 %11, %1
  %13 = sitofp i32 %12 to float
  br label %common.ret
}

attributes #0 = { nofree nosync nounwind 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,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass