; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2019-20/Open/Plat/exercise_3000_dwr.ll (Z2pwii)

; 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: 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 @_Z2pwii(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 %5, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store i32 1, ptr %3, align 4
  br label %39

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sdiv i32 %12, 2
  %14 = call noundef i32 @_Z2pwii(i32 noundef %11, i32 noundef %13)
  store i32 %14, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = mul nsw i64 %16, %18
  %20 = load i32, ptr @mod, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = srem i64 %19, %21
  %23 = trunc i64 %22 to i32
  store i32 %23, ptr %6, align 4, !tbaa !5
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = and i32 %24, 1
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %37

27:                                               ; preds = %10
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %32 = mul nsw i64 %29, %31
  %33 = load i32, ptr @mod, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = srem i64 %32, %34
  %36 = trunc i64 %35 to i32
  store i32 %36, ptr %6, align 4, !tbaa !5
  br label %37

37:                                               ; preds = %27, %10
  %38 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %38, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %39

39:                                               ; preds = %37, %9
  %40 = load i32, ptr %3, align 4
  ret i32 %40
}

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"

@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(i32 -2147483647, -2147483648) i32 @_Z2pwii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 0
  br i1 %3, label %18, label %4

4:                                                ; preds = %2
  %5 = sdiv i32 %1, 2
  %6 = tail call noundef i32 @_Z2pwii(i32 noundef %0, i32 noundef %5)
  %7 = sext i32 %6 to i64
  %8 = mul nsw i64 %7, %7
  %9 = load i32, ptr @mod, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = srem i64 %8, %10
  %12 = and i32 %1, 1
  %.not = icmp eq i32 %12, 0
  br i1 %.not, label %17, label %13

13:                                               ; preds = %4
  %14 = sext i32 %0 to i64
  %15 = mul nsw i64 %11, %14
  %16 = srem i64 %15, %10
  br label %17

17:                                               ; preds = %13, %4
  %.0.in = phi i64 [ %16, %13 ], [ %11, %4 ]
  %.0 = trunc nsw i64 %.0.in to i32
  br label %18

18:                                               ; preds = %2, %17
  %.010 = phi i32 [ %.0, %17 ], [ 1, %2 ]
  ret i32 %.010
}

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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass