; LLVM IR from bqi343/cp-notebook :: Contests/Other Solutions/VT HSPC/2017/Code.ll (ZN4Poly3NTT6modpowExx)

; 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 i64 @_ZN4Poly3NTT6modpowExx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %6 = icmp ne i64 %5, 0
  br i1 %6, label %8, label %7

7:                                                ; preds = %2
  br label %26

8:                                                ; preds = %2
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = mul nsw i64 %9, %10
  %12 = srem i64 %11, 998244353
  %13 = load i64, ptr %4, align 8, !tbaa !5
  %14 = sdiv i64 %13, 2
  %15 = call noundef i64 @_ZN4Poly3NTT6modpowExx(i64 noundef %12, i64 noundef %14)
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = and i64 %16, 1
  %18 = icmp ne i64 %17, 0
  br i1 %18, label %19, label %21

19:                                               ; preds = %8
  %20 = load i64, ptr %3, align 8, !tbaa !5
  br label %22

21:                                               ; preds = %8
  br label %22

22:                                               ; preds = %21, %19
  %23 = phi i64 [ %20, %19 ], [ 1, %21 ]
  %24 = mul nsw i64 %15, %23
  %25 = srem i64 %24, 998244353
  br label %26

26:                                               ; preds = %22, %7
  %27 = phi i64 [ 1, %7 ], [ %25, %22 ]
  ret i64 %27
}

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 = !{!"long long", !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 range(i64 -998244352, 998244353) i64 @_ZN4Poly3NTT6modpowExx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %common.ret7, label %3

common.ret7:                                      ; preds = %2, %3
  %common.ret7.op = phi i64 [ %11, %3 ], [ 1, %2 ]
  ret i64 %common.ret7.op

3:                                                ; preds = %2
  %4 = mul nsw i64 %0, %0
  %5 = urem i64 %4, 998244353
  %6 = sdiv i64 %1, 2
  %7 = tail call noundef i64 @_ZN4Poly3NTT6modpowExx(i64 noundef %5, i64 noundef %6)
  %8 = and i64 %1, 1
  %.not6 = icmp eq i64 %8, 0
  %9 = select i1 %.not6, i64 1, i64 %0
  %10 = mul nsw i64 %7, %9
  %11 = srem i64 %10, 998244353
  br label %common.ret7
}

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: GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass