; LLVM IR from gem5/gem5 :: src/systemc/tests/systemc/misc/stars/star110089 (star110089)

; 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 uwtable
declare dso_local noundef signext i8 @_ZN12lp_write_buf14read_from_userEj(ptr noundef nonnull align 8 dereferenceable(3280), i32 noundef) #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12lp_write_buf15write_to_kernelEjc(ptr noundef nonnull align 8 dereferenceable(3280), i32 noundef, i8 noundef signext) #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN12lp_write_buf14copy_from_userEjjm(ptr noundef nonnull align 8 dereferenceable(3280) %0, i32 noundef %1, i32 noundef %2, i64 noundef %3) #0 align 2 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i64 %3, ptr %8, align 8, !tbaa !11
  %9 = load ptr, ptr %5, align 8
  br label %10

10:                                               ; preds = %19, %4
  %11 = load i64, ptr %8, align 8, !tbaa !11
  %12 = icmp ugt i64 %11, 0
  br i1 %12, label %13, label %22

13:                                               ; preds = %10
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = add i32 %14, 1
  store i32 %15, ptr %7, align 4, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = add i32 %16, 1
  store i32 %17, ptr %6, align 4, !tbaa !9
  %18 = call noundef signext i8 @_ZN12lp_write_buf14read_from_userEj(ptr noundef nonnull align 8 dereferenceable(3280) %9, i32 noundef %16)
  call void @_ZN12lp_write_buf15write_to_kernelEjc(ptr noundef nonnull align 8 dereferenceable(3280) %9, i32 noundef %14, i8 noundef signext %18)
  br label %19

19:                                               ; preds = %13
  %20 = load i64, ptr %8, align 8, !tbaa !11
  %21 = add i64 %20, -1
  store i64 %21, ptr %8, align 8, !tbaa !11
  br label %10, !llvm.loop !13

22:                                               ; preds = %10
  ret i32 0
}

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 = !{!"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 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 uwtable
declare dso_local noundef signext i8 @_ZN12lp_write_buf14read_from_userEj(ptr noundef nonnull align 8 dereferenceable(3280), i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN12lp_write_buf15write_to_kernelEjc(ptr noundef nonnull align 8 dereferenceable(3280), i32 noundef, i8 noundef signext) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_ZN12lp_write_buf14copy_from_userEjjm(ptr noundef nonnull align 8 dereferenceable(3280) %0, i32 noundef %1, i32 noundef %2, i64 noundef %3) local_unnamed_addr #0 align 2 {
  %.not6 = icmp eq i64 %3, 0
  br i1 %.not6, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.09 = phi i64 [ %8, %.lr.ph ], [ %3, %4 ]
  %.048 = phi i32 [ %5, %.lr.ph ], [ %2, %4 ]
  %.057 = phi i32 [ %6, %.lr.ph ], [ %1, %4 ]
  %5 = add i32 %.048, 1
  %6 = add i32 %.057, 1
  %7 = tail call noundef signext i8 @_ZN12lp_write_buf14read_from_userEj(ptr noundef nonnull align 8 dereferenceable(3280) %0, i32 noundef %.057)
  tail call void @_ZN12lp_write_buf15write_to_kernelEjc(ptr noundef nonnull align 8 dereferenceable(3280) %0, i32 noundef %.048, i8 noundef signext %7)
  %8 = add i64 %.09, -1
  %.not = icmp eq i64 %8, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret i32 0
}

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass