; LLVM IR from Py-Contributors/AlgorithmsAndDataStructure :: C++/Algorithms/RecursionAlgorithms/powUsingRecursion.ll (Z5powerii)

; 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: mustprogress uwtable
define dso_local noundef i32 @_Z5powerii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, 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 = icmp eq i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  store i32 1, ptr %3, align 4
  br label %35

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = srem i32 %10, 2
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %23

13:                                               ; preds = %9
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = sdiv i32 %15, 2
  %17 = call noundef i32 @_Z5powerii(i32 noundef %14, i32 noundef %16)
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = sdiv i32 %19, 2
  %21 = call noundef i32 @_Z5powerii(i32 noundef %18, i32 noundef %20)
  %22 = mul nsw i32 %17, %21
  store i32 %22, ptr %3, align 4
  br label %35

23:                                               ; preds = %9
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = sdiv i32 %26, 2
  %28 = call noundef i32 @_Z5powerii(i32 noundef %25, i32 noundef %27)
  %29 = mul nsw i32 %24, %28
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !5
  %32 = sdiv i32 %31, 2
  %33 = call noundef i32 @_Z5powerii(i32 noundef %30, i32 noundef %32)
  %34 = mul nsw i32 %29, %33
  store i32 %34, ptr %3, align 4
  br label %35

35:                                               ; preds = %23, %13, %8
  %36 = load i32, ptr %3, align 4
  ret i32 %36
}

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" }

!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++ 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: mustprogress nofree nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z5powerii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 0
  br i1 %3, label %common.ret13, label %4

4:                                                ; preds = %2
  %5 = and i32 %1, 1
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %11

common.ret13:                                     ; preds = %2, %11, %7
  %common.ret13.op = phi i32 [ %10, %7 ], [ %15, %11 ], [ 1, %2 ]
  ret i32 %common.ret13.op

7:                                                ; preds = %4
  %8 = ashr exact i32 %1, 1
  %9 = tail call noundef i32 @_Z5powerii(i32 noundef %0, i32 noundef %8)
  %10 = mul nsw i32 %9, %9
  br label %common.ret13

11:                                               ; preds = %4
  %12 = sdiv i32 %1, 2
  %13 = tail call noundef i32 @_Z5powerii(i32 noundef %0, i32 noundef %12)
  %14 = mul nsw i32 %13, %0
  %15 = mul nsw i32 %14, %13
  br label %common.ret13
}

attributes #0 = { mustprogress nofree 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: EarlyCSEPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass