; LLVM IR from sgtlaugh/algovault :: code_library (gamblers_ruin)

; 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 x86_fp80 @expo(x86_fp80 noundef %0, i32 noundef %1) #0 {
  %3 = alloca x86_fp80, align 16
  %4 = alloca x86_fp80, align 16
  %5 = alloca i32, align 4
  %6 = alloca x86_fp80, align 16
  store x86_fp80 %0, ptr %4, align 16, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %7 = load i32, ptr %5, align 4, !tbaa !9
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store x86_fp80 0xK3FFF8000000000000000, ptr %3, align 16
  br label %29

10:                                               ; preds = %2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = and i32 %11, 1
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %21

14:                                               ; preds = %10
  %15 = load x86_fp80, ptr %4, align 16, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sub nsw i32 %16, 1
  %18 = call x86_fp80 @expo(x86_fp80 noundef %15, i32 noundef %17)
  %19 = load x86_fp80, ptr %4, align 16, !tbaa !5
  %20 = fmul x86_fp80 %18, %19
  store x86_fp80 %20, ptr %3, align 16
  br label %29

21:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 16, ptr %6) #2
  %22 = load x86_fp80, ptr %4, align 16, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = ashr i32 %23, 1
  %25 = call x86_fp80 @expo(x86_fp80 noundef %22, i32 noundef %24)
  store x86_fp80 %25, ptr %6, align 16, !tbaa !5
  %26 = load x86_fp80, ptr %6, align 16, !tbaa !5
  %27 = load x86_fp80, ptr %6, align 16, !tbaa !5
  %28 = fmul x86_fp80 %26, %27
  store x86_fp80 %28, ptr %3, align 16
  call void @llvm.lifetime.end.p0(i64 16, ptr %6) #2
  br label %29

29:                                               ; preds = %21, %14, %9
  %30 = load x86_fp80, ptr %3, align 16
  ret x86_fp80 %30
}

; 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 = { 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, !6, i64 0}
!6 = !{!"long double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, 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: nofree nosync nounwind memory(none) uwtable
define dso_local x86_fp80 @expo(x86_fp80 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 0
  br i1 %3, label %common.ret10, label %4

4:                                                ; preds = %2
  %5 = and i32 %1, 1
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %10, label %6

common.ret10:                                     ; preds = %2, %10, %6
  %common.ret10.op = phi x86_fp80 [ %9, %6 ], [ %13, %10 ], [ 0xK3FFF8000000000000000, %2 ]
  ret x86_fp80 %common.ret10.op

6:                                                ; preds = %4
  %7 = add nsw i32 %1, -1
  %8 = tail call x86_fp80 @expo(x86_fp80 noundef %0, i32 noundef %7)
  %9 = fmul x86_fp80 %8, %0
  br label %common.ret10

10:                                               ; preds = %4
  %11 = ashr exact i32 %1, 1
  %12 = tail call x86_fp80 @expo(x86_fp80 noundef %0, i32 noundef %11)
  %13 = fmul x86_fp80 %12, %12
  br label %common.ret10
}

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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass