; LLVM IR from alexpizarroj/acm-icpc-trd :: src/math/deterministic-miller-rabin.ll (Z7fastexpyyy)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_Z6mulmodyyy(i64 noundef, i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z7fastexpyyy(i64 noundef %0, i64 noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i64 %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !5
  %9 = load i64, ptr %6, align 8, !tbaa !5
  %10 = icmp eq i64 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %3
  store i64 1, ptr %4, align 8
  br label %41

12:                                               ; preds = %3
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = icmp eq i64 %13, 1
  br i1 %14, label %15, label %19

15:                                               ; preds = %12
  %16 = load i64, ptr %5, align 8, !tbaa !5
  %17 = load i64, ptr %7, align 8, !tbaa !5
  %18 = urem i64 %16, %17
  store i64 %18, ptr %4, align 8
  br label %41

19:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 1, ptr %8, align 8, !tbaa !5
  br label %20

20:                                               ; preds = %32, %19
  %21 = load i64, ptr %6, align 8, !tbaa !5
  %22 = icmp ugt i64 %21, 0
  br i1 %22, label %23, label %39

23:                                               ; preds = %20
  %24 = load i64, ptr %6, align 8, !tbaa !5
  %25 = urem i64 %24, 2
  %26 = icmp eq i64 %25, 1
  br i1 %26, label %27, label %32

27:                                               ; preds = %23
  %28 = load i64, ptr %5, align 8, !tbaa !5
  %29 = load i64, ptr %8, align 8, !tbaa !5
  %30 = load i64, ptr %7, align 8, !tbaa !5
  %31 = call noundef i64 @_Z6mulmodyyy(i64 noundef %28, i64 noundef %29, i64 noundef %30)
  store i64 %31, ptr %8, align 8, !tbaa !5
  br label %32

32:                                               ; preds = %27, %23
  %33 = load i64, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %5, align 8, !tbaa !5
  %35 = load i64, ptr %7, align 8, !tbaa !5
  %36 = call noundef i64 @_Z6mulmodyyy(i64 noundef %33, i64 noundef %34, i64 noundef %35)
  store i64 %36, ptr %5, align 8, !tbaa !5
  %37 = load i64, ptr %6, align 8, !tbaa !5
  %38 = udiv i64 %37, 2
  store i64 %38, ptr %6, align 8, !tbaa !5
  br label %20, !llvm.loop !9

39:                                               ; preds = %20
  %40 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %40, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %41

41:                                               ; preds = %39, %15, %11
  %42 = load i64, ptr %4, align 8
  ret i64 %42
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 @_Z6mulmodyyy(i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z7fastexpyyy(i64 noundef %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  switch i64 %1, label %.lr.ph [
    i64 0, label %.loopexit
    i64 1, label %4
  ]

4:                                                ; preds = %3
  %5 = urem i64 %0, %2
  br label %.loopexit

.lr.ph:                                           ; preds = %3, %9
  %.023 = phi i64 [ %.1, %9 ], [ 1, %3 ]
  %.01622 = phi i64 [ %11, %9 ], [ %1, %3 ]
  %.01721 = phi i64 [ %10, %9 ], [ %0, %3 ]
  %6 = and i64 %.01622, 1
  %.not19 = icmp eq i64 %6, 0
  br i1 %.not19, label %9, label %7

7:                                                ; preds = %.lr.ph
  %8 = tail call noundef i64 @_Z6mulmodyyy(i64 noundef %.01721, i64 noundef %.023, i64 noundef %2)
  br label %9

9:                                                ; preds = %7, %.lr.ph
  %.1 = phi i64 [ %8, %7 ], [ %.023, %.lr.ph ]
  %10 = tail call noundef i64 @_Z6mulmodyyy(i64 noundef %.01721, i64 noundef %.01721, i64 noundef %2)
  %11 = lshr i64 %.01622, 1
  %.not = icmp ult i64 %.01622, 2
  br i1 %.not, label %.loopexit, label %.lr.ph, !llvm.loop !5

.loopexit:                                        ; preds = %9, %3, %4
  %.015 = phi i64 [ %5, %4 ], [ 1, %3 ], [ %.1, %9 ]
  ret i64 %.015
}

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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass