; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2019-20/Open/Plat/ex_plat.ll (Z4mpowxx)

; 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"

@MOD = external dso_local global i32, align 4

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z4mpowxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %6 = icmp ne i64 %5, 0
  br i1 %6, label %8, label %7

7:                                                ; preds = %2
  br label %30

8:                                                ; preds = %2
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %3, align 8, !tbaa !5
  %11 = mul nsw i64 %9, %10
  %12 = load i32, ptr @MOD, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = srem i64 %11, %13
  %15 = load i64, ptr %4, align 8, !tbaa !5
  %16 = sdiv i64 %15, 2
  %17 = call noundef i64 @_Z4mpowxx(i64 noundef %14, i64 noundef %16)
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = and i64 %18, 1
  %20 = icmp ne i64 %19, 0
  br i1 %20, label %21, label %23

21:                                               ; preds = %8
  %22 = load i64, ptr %3, align 8, !tbaa !5
  br label %24

23:                                               ; preds = %8
  br label %24

24:                                               ; preds = %23, %21
  %25 = phi i64 [ %22, %21 ], [ 1, %23 ]
  %26 = mul nsw i64 %17, %25
  %27 = load i32, ptr @MOD, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = srem i64 %26, %28
  br label %30

30:                                               ; preds = %24, %7
  %31 = phi i64 [ 1, %7 ], [ %29, %24 ]
  ret i64 %31
}

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" }

!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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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"

@MOD = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef range(i64 -2147483647, 2147483648) i64 @_Z4mpowxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i64 %1, 0
  br i1 %.not, label %common.ret7, label %3

common.ret7:                                      ; preds = %2, %3
  %common.ret7.op = phi i64 [ %13, %3 ], [ 1, %2 ]
  ret i64 %common.ret7.op

3:                                                ; preds = %2
  %4 = mul nsw i64 %0, %0
  %5 = load i32, ptr @MOD, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = srem i64 %4, %6
  %8 = sdiv i64 %1, 2
  %9 = tail call noundef i64 @_Z4mpowxx(i64 noundef %7, i64 noundef %8)
  %10 = and i64 %1, 1
  %.not6 = icmp eq i64 %10, 0
  %11 = select i1 %.not6, i64 1, i64 %0
  %12 = mul nsw i64 %9, %11
  %13 = srem i64 %12, %6
  br label %common.ret7
}

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: 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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass