; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2007-08/treasure.ll (ZN5modOp10invGeneralEii)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN5modOp10invGeneralEii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %14

9:                                                ; preds = %2
  %10 = load i32, ptr %5, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 1
  %12 = zext i1 %11 to i64
  %13 = select i1 %11, i32 0, i32 -1
  store i32 %13, ptr %3, align 4
  br label %42

14:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = call noundef i32 @_ZN5modOp10invGeneralEii(i32 noundef %17, i32 noundef %18)
  store i32 %19, ptr %6, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp eq i32 %20, -1
  br i1 %21, label %22, label %23

22:                                               ; preds = %14
  br label %39

23:                                               ; preds = %14
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = mul nsw i64 %25, %27
  %29 = sub nsw i64 1, %28
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = sdiv i64 %29, %31
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = add nsw i64 %32, %34
  %36 = load i32, ptr %5, align 4, !tbaa !5
  %37 = sext i32 %36 to i64
  %38 = srem i64 %35, %37
  br label %39

39:                                               ; preds = %23, %22
  %40 = phi i64 [ -1, %22 ], [ %38, %23 ]
  %41 = trunc i64 %40 to i32
  store i32 %41, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %42

42:                                               ; preds = %39, %9
  %43 = load i32, ptr %3, align 4
  ret i32 %43
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 range(i32 -2147483647, -2147483648) i32 @_ZN5modOp10invGeneralEii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %0, 0
  br i1 %3, label %4, label %7

4:                                                ; preds = %2
  %5 = icmp ne i32 %1, 1
  %6 = sext i1 %5 to i32
  br label %21

7:                                                ; preds = %2
  %8 = srem i32 %1, %0
  %9 = tail call noundef i32 @_ZN5modOp10invGeneralEii(i32 noundef %8, i32 noundef %0)
  %10 = icmp eq i32 %9, -1
  br i1 %10, label %21, label %11

11:                                               ; preds = %7
  %12 = sext i32 %1 to i64
  %13 = sext i32 %9 to i64
  %14 = mul nsw i64 %13, %12
  %15 = sub nsw i64 1, %14
  %16 = sext i32 %0 to i64
  %17 = sdiv i64 %15, %16
  %18 = add nsw i64 %17, %12
  %19 = srem i64 %18, %12
  %20 = trunc nsw i64 %19 to i32
  br label %21

21:                                               ; preds = %11, %7, %4
  %.0 = phi i32 [ %6, %4 ], [ %20, %11 ], [ -1, %7 ]
  ret i32 %.0
}

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