; LLVM IR from codemistic/Data-Structures-and-Algorithms :: Hashtable/Palindrome-Substring-Queries.ll (Z6modPowyy)

; 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 @_Z6modPowyy(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
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  %8 = load i64, ptr %5, align 8, !tbaa !5
  %9 = icmp eq i64 %8, 0
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i64 1, ptr %3, align 8
  br label %43

11:                                               ; preds = %2
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = icmp eq i64 %12, 1
  br i1 %13, label %14, label %16

14:                                               ; preds = %11
  %15 = load i64, ptr %4, align 8, !tbaa !5
  store i64 %15, ptr %3, align 8
  br label %43

16:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %5, align 8, !tbaa !5
  %19 = udiv i64 %18, 2
  %20 = call noundef i64 @_Z6modPowyy(i64 noundef %17, i64 noundef %19)
  store i64 %20, ptr %6, align 8, !tbaa !5
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = urem i64 %21, 2
  %23 = icmp eq i64 %22, 0
  br i1 %23, label %24, label %31

24:                                               ; preds = %16
  %25 = load i64, ptr %6, align 8, !tbaa !5
  %26 = urem i64 %25, 1000000007
  %27 = load i64, ptr %6, align 8, !tbaa !5
  %28 = mul i64 %26, %27
  %29 = urem i64 %28, 1000000007
  %30 = urem i64 %29, 1000000007
  store i64 %30, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %42

31:                                               ; preds = %16
  %32 = load i64, ptr %6, align 8, !tbaa !5
  %33 = urem i64 %32, 1000000007
  %34 = load i64, ptr %6, align 8, !tbaa !5
  %35 = mul i64 %33, %34
  %36 = urem i64 %35, 1000000007
  %37 = urem i64 %36, 1000000007
  %38 = load i64, ptr %4, align 8, !tbaa !5
  %39 = mul i64 %37, %38
  %40 = urem i64 %39, 1000000007
  %41 = urem i64 %40, 1000000007
  store i64 %41, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %42

42:                                               ; preds = %31, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %43

43:                                               ; preds = %42, %14, %10
  %44 = load i64, ptr %3, align 8
  ret i64 %44
}

; 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 = !{!"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 i64 @_Z6modPowyy(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  switch i64 %1, label %4 [
    i64 0, label %15
    i64 1, label %3
  ]

3:                                                ; preds = %2
  br label %15

4:                                                ; preds = %2
  %5 = lshr i64 %1, 1
  %6 = tail call noundef i64 @_Z6modPowyy(i64 noundef %0, i64 noundef %5)
  %7 = and i64 %1, 1
  %8 = icmp eq i64 %7, 0
  %9 = urem i64 %6, 1000000007
  %10 = mul i64 %9, %6
  br i1 %8, label %14, label %11

11:                                               ; preds = %4
  %12 = urem i64 %10, 1000000007
  %13 = mul i64 %12, %0
  br label %14

14:                                               ; preds = %4, %11
  %.0.in = phi i64 [ %13, %11 ], [ %10, %4 ]
  %.0 = urem i64 %.0.in, 1000000007
  br label %15

15:                                               ; preds = %2, %14, %3
  %.1 = phi i64 [ %0, %3 ], [ %.0, %14 ], [ 1, %2 ]
  ret i64 %.1
}

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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass