; LLVM IR from VastoLorde95/Competitive-Programming :: SPOJ/Random/MMOD29/ref.ll (Z6bigmodiii)

; 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 @_Z6bigmodiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %3
  store i32 1, ptr %4, align 4
  br label %46

12:                                               ; preds = %3
  %13 = load i32, ptr %6, align 4, !tbaa !5
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %19

15:                                               ; preds = %12
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = srem i32 %16, %17
  store i32 %18, ptr %4, align 4
  br label %46

19:                                               ; preds = %12
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = and i32 %20, 1
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %35

23:                                               ; preds = %19
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = load i32, ptr %7, align 4, !tbaa !5
  %26 = srem i32 %24, %25
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = sub nsw i32 %28, 1
  %30 = load i32, ptr %7, align 4, !tbaa !5
  %31 = call noundef i32 @_Z6bigmodiii(i32 noundef %27, i32 noundef %29, i32 noundef %30)
  %32 = mul nsw i32 %26, %31
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = srem i32 %32, %33
  store i32 %34, ptr %4, align 4
  br label %46

35:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = sdiv i32 %37, 2
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = call noundef i32 @_Z6bigmodiii(i32 noundef %36, i32 noundef %38, i32 noundef %39)
  store i32 %40, ptr %8, align 4, !tbaa !5
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %8, align 4, !tbaa !5
  %43 = mul nsw i32 %41, %42
  %44 = load i32, ptr %7, align 4, !tbaa !5
  %45 = srem i32 %43, %44
  store i32 %45, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %46

46:                                               ; preds = %35, %23, %15, %11
  %47 = load i32, ptr %4, align 4
  ret i32 %47
}

; 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 = { 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" }
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 = !{!"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 @_Z6bigmodiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  switch i32 %1, label %4 [
    i32 0, label %common.ret
    i32 1, label %common.ret.sink.split
  ]

4:                                                ; preds = %3
  %5 = and i32 %1, 1
  %.not = icmp eq i32 %5, 0
  br i1 %.not, label %12, label %7

common.ret.sink.split:                            ; preds = %3, %7, %12
  %.sink = phi i32 [ %15, %12 ], [ %11, %7 ], [ %0, %3 ]
  %6 = srem i32 %.sink, %2
  br label %common.ret

common.ret:                                       ; preds = %common.ret.sink.split, %3
  %common.ret.op = phi i32 [ 1, %3 ], [ %6, %common.ret.sink.split ]
  ret i32 %common.ret.op

7:                                                ; preds = %4
  %8 = srem i32 %0, %2
  %9 = add nsw i32 %1, -1
  %10 = tail call noundef i32 @_Z6bigmodiii(i32 noundef %0, i32 noundef %9, i32 noundef %2)
  %11 = mul nsw i32 %10, %8
  br label %common.ret.sink.split

12:                                               ; preds = %4
  %13 = ashr exact i32 %1, 1
  %14 = tail call noundef i32 @_Z6bigmodiii(i32 noundef %0, i32 noundef %13, i32 noundef %2)
  %15 = mul nsw i32 %14, %14
  br label %common.ret.sink.split
}

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