; LLVM IR from sfu-dis/mosaicdb :: dbcore/tests/w_rand.ll (ZN6w_rand5randnEj)

; 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 nounwind uwtable
declare dso_local noundef i32 @_ZN6w_rand4randEv(ptr noundef nonnull align 4 dereferenceable(68)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN6w_rand5randnEj(ptr noundef nonnull align 4 dereferenceable(68) %0, i32 noundef %1) #1 align 2 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %7 = load ptr, ptr %4, align 8
  %8 = load i32, ptr %5, align 4, !tbaa !9
  %9 = icmp ult i32 %8, 2
  br i1 %9, label %10, label %11

10:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  br label %26

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  br label %12

12:                                               ; preds = %20, %11
  %13 = load i32, ptr %5, align 4, !tbaa !9
  %14 = zext i32 %13 to i64
  %15 = call noundef i32 @_ZN6w_rand4randEv(ptr noundef nonnull align 4 dereferenceable(68) %7)
  %16 = zext i32 %15 to i64
  %17 = mul i64 %14, %16
  %18 = udiv i64 %17, 4294967295
  %19 = trunc i64 %18 to i32
  store i32 %19, ptr %6, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %12
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = icmp uge i32 %21, %22
  br i1 %23, label %12, label %24, !llvm.loop !11

24:                                               ; preds = %20
  %25 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %25, ptr %3, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %26

26:                                               ; preds = %24, %10
  %27 = load i32, ptr %3, align 4
  ret i32 %27
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 nounwind uwtable
declare dso_local noundef i32 @_ZN6w_rand4randEv(ptr noundef nonnull align 4 dereferenceable(68)) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 0, -1) i32 @_ZN6w_rand5randnEj(ptr noundef nonnull align 4 dereferenceable(68) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = icmp ult i32 %1, 2
  br i1 %3, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2
  %4 = zext i32 %1 to i64
  br label %5

5:                                                ; preds = %.preheader, %5
  %6 = tail call noundef i32 @_ZN6w_rand4randEv(ptr noundef nonnull align 4 dereferenceable(68) %0)
  %7 = zext i32 %6 to i64
  %8 = mul nuw i64 %7, %4
  %9 = udiv i64 %8, 4294967295
  %10 = trunc nuw i64 %9 to i32
  %.not = icmp ult i32 %10, %1
  br i1 %.not, label %.loopexit, label %5, !llvm.loop !5

.loopexit:                                        ; preds = %5, %2
  %.0 = phi i32 [ 0, %2 ], [ %10, %5 ]
  ret i32 %.0
}

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" }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass