; LLVM IR from abeaumont/competitive-programming :: codechef/dec19a/binxor.ll (Z6modinvxx)

; 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 @_Z6modinvxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i32, align 4
  %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
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 1, ptr %9, align 8, !tbaa !5
  %11 = load i64, ptr %5, align 8, !tbaa !5
  %12 = icmp eq i64 %11, 1
  br i1 %12, label %13, label %14

13:                                               ; preds = %2
  store i32 1, ptr %3, align 4
  store i32 1, ptr %10, align 4
  br label %37

14:                                               ; preds = %2
  br label %15

15:                                               ; preds = %18, %14
  %16 = load i64, ptr %4, align 8, !tbaa !5
  %17 = icmp sgt i64 %16, 1
  br i1 %17, label %18, label %34

18:                                               ; preds = %15
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %5, align 8, !tbaa !5
  %21 = sdiv i64 %19, %20
  store i64 %21, ptr %7, align 8, !tbaa !5
  %22 = load i64, ptr %5, align 8, !tbaa !5
  store i64 %22, ptr %6, align 8, !tbaa !5
  %23 = load i64, ptr %4, align 8, !tbaa !5
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = srem i64 %23, %24
  store i64 %25, ptr %5, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %26, ptr %4, align 8, !tbaa !5
  %27 = load i64, ptr %8, align 8, !tbaa !5
  store i64 %27, ptr %6, align 8, !tbaa !5
  %28 = load i64, ptr %9, align 8, !tbaa !5
  %29 = load i64, ptr %7, align 8, !tbaa !5
  %30 = load i64, ptr %8, align 8, !tbaa !5
  %31 = mul nsw i64 %29, %30
  %32 = sub nsw i64 %28, %31
  store i64 %32, ptr %8, align 8, !tbaa !5
  %33 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %33, ptr %9, align 8, !tbaa !5
  br label %15, !llvm.loop !9

34:                                               ; preds = %15
  %35 = load i64, ptr %9, align 8, !tbaa !5
  %36 = trunc i64 %35 to i32
  store i32 %36, ptr %3, align 4
  store i32 1, ptr %10, align 4
  br label %37

37:                                               ; preds = %34, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %38 = load i32, ptr %3, align 4
  ret i32 %38
}

; 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 = !{!"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 nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z6modinvxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = icmp ne i64 %1, 1
  %4 = icmp sgt i64 %0, 1
  %or.cond = and i1 %3, %4
  br i1 %or.cond, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %.lr.ph
  %.023 = phi i64 [ %.01522, %.lr.ph ], [ 1, %2 ]
  %.01522 = phi i64 [ %8, %.lr.ph ], [ 0, %2 ]
  %.01721 = phi i64 [ %.01820, %.lr.ph ], [ %0, %2 ]
  %.01820 = phi i64 [ %6, %.lr.ph ], [ %1, %2 ]
  %5 = sdiv i64 %.01721, %.01820
  %6 = srem i64 %.01721, %.01820
  %7 = mul nsw i64 %5, %.01522
  %8 = sub nsw i64 %.023, %7
  %9 = icmp sgt i64 %.01820, 1
  br i1 %9, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !5

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %10 = trunc i64 %.01522 to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %.016 = phi i32 [ 1, %2 ], [ %10, %._crit_edge.loopexit ]
  ret i32 %.016
}

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