; LLVM IR from Hazrat-Ali9/HackerRank-Mathematics :: diwali-lights.ll (Z6modexpiii)

; 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
define dso_local noundef i32 @_Z6modexpiii(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 i64, align 8
  %8 = alloca i64, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 1, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  store i64 %10, ptr %8, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %25, %3
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %34

14:                                               ; preds = %11
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = and i32 %15, 1
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %25

18:                                               ; preds = %14
  %19 = load i64, ptr %7, align 8, !tbaa !9
  %20 = load i64, ptr %8, align 8, !tbaa !9
  %21 = mul nsw i64 %19, %20
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = srem i64 %21, %23
  store i64 %24, ptr %7, align 8, !tbaa !9
  br label %25

25:                                               ; preds = %18, %14
  %26 = load i64, ptr %8, align 8, !tbaa !9
  %27 = load i64, ptr %8, align 8, !tbaa !9
  %28 = mul nsw i64 %26, %27
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = srem i64 %28, %30
  store i64 %31, ptr %8, align 8, !tbaa !9
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = ashr i32 %32, 1
  store i32 %33, ptr %5, align 4, !tbaa !5
  br label %11, !llvm.loop !11

34:                                               ; preds = %11
  %35 = load i64, ptr %7, align 8, !tbaa !9
  %36 = load i32, ptr %6, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = srem i64 %35, %37
  %39 = trunc i64 %38 to i32
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  ret i32 %39
}

; 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 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z6modexpiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not15 = icmp eq i32 %1, 0
  br i1 %.not15, label %.._crit_edge_crit_edge, label %.lr.ph

.._crit_edge_crit_edge:                           ; preds = %3
  %.pre = sext i32 %2 to i64
  br label %._crit_edge

.lr.ph:                                           ; preds = %3
  %4 = sext i32 %0 to i64
  %5 = sext i32 %2 to i64
  br label %6

6:                                                ; preds = %.lr.ph, %11
  %.018 = phi i64 [ %4, %.lr.ph ], [ %13, %11 ]
  %.01217 = phi i64 [ 1, %.lr.ph ], [ %.1, %11 ]
  %.01316 = phi i32 [ %1, %.lr.ph ], [ %14, %11 ]
  %7 = and i32 %.01316, 1
  %.not14 = icmp eq i32 %7, 0
  br i1 %.not14, label %11, label %8

8:                                                ; preds = %6
  %9 = mul nsw i64 %.018, %.01217
  %10 = srem i64 %9, %5
  br label %11

11:                                               ; preds = %8, %6
  %.1 = phi i64 [ %10, %8 ], [ %.01217, %6 ]
  %12 = mul nsw i64 %.018, %.018
  %13 = srem i64 %12, %5
  %14 = ashr i32 %.01316, 1
  %.not = icmp ult i32 %.01316, 2
  br i1 %.not, label %._crit_edge, label %6, !llvm.loop !5

._crit_edge:                                      ; preds = %11, %.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre, %.._crit_edge_crit_edge ], [ %5, %11 ]
  %.012.lcssa = phi i64 [ 1, %.._crit_edge_crit_edge ], [ %.1, %11 ]
  %15 = srem i64 %.012.lcssa, %.pre-phi
  %16 = trunc nsw i64 %15 to i32
  ret i32 %16
}

attributes #0 = { mustprogress nofree norecurse 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)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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