; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef/JAN2021-Long/ORAND.ll (Z5powerxx)

; 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 nounwind uwtable
declare dso_local noundef i64 @_Z3mulxx(i64 noundef, i64 noundef) #0

; 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5powerxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  %7 = load i64, ptr %5, align 8, !tbaa !5
  %8 = icmp slt i64 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store i64 1, ptr %3, align 8
  br label %32

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 1, ptr %6, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = srem i64 %11, 998244353
  store i64 %12, ptr %4, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %24, %10
  %14 = load i64, ptr %5, align 8, !tbaa !5
  %15 = icmp ne i64 %14, 0
  br i1 %15, label %16, label %30

16:                                               ; preds = %13
  %17 = load i64, ptr %5, align 8, !tbaa !5
  %18 = and i64 %17, 1
  %19 = icmp ne i64 %18, 0
  br i1 %19, label %20, label %24

20:                                               ; preds = %16
  %21 = load i64, ptr %6, align 8, !tbaa !5
  %22 = load i64, ptr %4, align 8, !tbaa !5
  %23 = call noundef i64 @_Z3mulxx(i64 noundef %21, i64 noundef %22)
  store i64 %23, ptr %6, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %20, %16
  %25 = load i64, ptr %5, align 8, !tbaa !5
  %26 = ashr i64 %25, 1
  store i64 %26, ptr %5, align 8, !tbaa !5
  %27 = load i64, ptr %4, align 8, !tbaa !5
  %28 = load i64, ptr %4, align 8, !tbaa !5
  %29 = call noundef i64 @_Z3mulxx(i64 noundef %27, i64 noundef %28)
  store i64 %29, ptr %4, align 8, !tbaa !5
  br label %13, !llvm.loop !9

30:                                               ; preds = %13
  %31 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %31, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %32

32:                                               ; preds = %30, %9
  %33 = load i64, ptr %3, align 8
  ret i64 %33
}

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, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; 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 nounwind uwtable
declare dso_local noundef i64 @_Z3mulxx(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5powerxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %or.cond = icmp slt i64 %1, 1
  br i1 %or.cond, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %3 = srem i64 %0, 998244353
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %7
  %.019 = phi i64 [ %.1, %7 ], [ 1, %.lr.ph.preheader ]
  %.01118 = phi i64 [ %8, %7 ], [ %1, %.lr.ph.preheader ]
  %.01217 = phi i64 [ %9, %7 ], [ %3, %.lr.ph.preheader ]
  %4 = and i64 %.01118, 1
  %.not15 = icmp eq i64 %4, 0
  br i1 %.not15, label %7, label %5

5:                                                ; preds = %.lr.ph
  %6 = tail call noundef i64 @_Z3mulxx(i64 noundef %.019, i64 noundef %.01217)
  br label %7

7:                                                ; preds = %5, %.lr.ph
  %.1 = phi i64 [ %6, %5 ], [ %.019, %.lr.ph ]
  %8 = lshr i64 %.01118, 1
  %9 = tail call noundef i64 @_Z3mulxx(i64 noundef %.01217, i64 noundef %.01217)
  %.not = icmp ult i64 %.01118, 2
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.loopexit:                                        ; preds = %7, %2
  %.013 = phi i64 [ 1, %2 ], [ %.1, %7 ]
  ret i64 %.013
}

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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass