; LLVM IR from alekras/ao.rtos.cpp :: Library/Display/display.ll (ZN7Display8clearRowEii)

; 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"

%class.Display = type { i32, i32, i32, i32, i32, i32 }

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN7Display5printEc(ptr noundef nonnull align 4 dereferenceable(24), i8 noundef signext) #1 align 2

; 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 void @_ZN7Display8clearRowEii(ptr noundef nonnull align 4 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 0
  %11 = load i32, ptr %10, align 4, !tbaa !11
  store i32 %11, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %12, ptr %8, align 4, !tbaa !9
  %13 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 0
  store i32 0, ptr %13, align 4, !tbaa !11
  br label %14

14:                                               ; preds = %23, %3
  %15 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 0
  %16 = load i32, ptr %15, align 4, !tbaa !11
  %17 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 2
  %18 = load i32, ptr %17, align 4, !tbaa !13
  %19 = icmp slt i32 %16, %18
  br i1 %19, label %20, label %27

20:                                               ; preds = %14
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = trunc i32 %21 to i8
  call void @_ZN7Display5printEc(ptr noundef nonnull align 4 dereferenceable(24) %9, i8 noundef signext %22)
  br label %23

23:                                               ; preds = %20
  %24 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 0
  %25 = load i32, ptr %24, align 4, !tbaa !11
  %26 = add nsw i32 %25, 1
  store i32 %26, ptr %24, align 4, !tbaa !11
  br label %14, !llvm.loop !14

27:                                               ; preds = %14
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = getelementptr inbounds %class.Display, ptr %9, i32 0, i32 0
  store i32 %28, ptr %29, align 4, !tbaa !11
  %30 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %30, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

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 = !{!"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, !10, i64 0}
!12 = !{!"_ZTS7Display", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!13 = !{!12, !10, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"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 void @_ZN7Display5printEc(ptr noundef nonnull align 4 dereferenceable(24), i8 noundef signext) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7Display8clearRowEii(ptr noundef nonnull align 4 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = load i32, ptr %0, align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  store i32 0, ptr %0, align 4, !tbaa !5
  %6 = load i32, ptr %5, align 4, !tbaa !10
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3
  %8 = trunc i32 %1 to i8
  br label %9

9:                                                ; preds = %.lr.ph, %9
  tail call void @_ZN7Display5printEc(ptr noundef nonnull align 4 dereferenceable(24) %0, i8 noundef signext %8)
  %10 = load i32, ptr %0, align 4, !tbaa !5
  %11 = add nsw i32 %10, 1
  store i32 %11, ptr %0, align 4, !tbaa !5
  %12 = load i32, ptr %5, align 4, !tbaa !10
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %9, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %9, %3
  store i32 %4, ptr %0, align 4, !tbaa !5
  ret void
}

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, !7, i64 0}
!6 = !{!"_ZTS7Display", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !7, i64 20}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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