; LLVM IR from FrancesoM/Bisc8FX :: sdk_projects/bisc8_platform/ps7_cortexa9_0/standalone_domain/bsp/ps7_cortexa9_0_ (Strcpy)

; 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: nounwind uwtable
define dso_local i32 @Xil_Strcpy(ptr noundef %0, ptr noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %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 ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 1, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %17, label %11

11:                                               ; preds = %3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = icmp eq ptr %12, null
  br i1 %13, label %17, label %14

14:                                               ; preds = %11
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %17, label %18

17:                                               ; preds = %14, %11, %3
  br label %58

18:                                               ; preds = %14
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %43, %18
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = sext i8 %24 to i32
  %26 = icmp ne i32 %25, 0
  br i1 %26, label %27, label %31

27:                                               ; preds = %19
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = load i32, ptr %6, align 4, !tbaa !9
  %30 = icmp ult i32 %28, %29
  br label %31

31:                                               ; preds = %27, %19
  %32 = phi i1 [ false, %19 ], [ %30, %27 ]
  br i1 %32, label %33, label %46

33:                                               ; preds = %31
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = zext i32 %35 to i64
  %37 = getelementptr inbounds i8, ptr %34, i64 %36
  %38 = load i8, ptr %37, align 1, !tbaa !11
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = load i32, ptr %8, align 4, !tbaa !9
  %41 = zext i32 %40 to i64
  %42 = getelementptr inbounds i8, ptr %39, i64 %41
  store i8 %38, ptr %42, align 1, !tbaa !11
  br label %43

43:                                               ; preds = %33
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = add i32 %44, 1
  store i32 %45, ptr %8, align 4, !tbaa !9
  br label %19, !llvm.loop !12

46:                                               ; preds = %31
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = load i32, ptr %6, align 4, !tbaa !9
  %49 = icmp eq i32 %47, %48
  br i1 %49, label %50, label %53

50:                                               ; preds = %46
  %51 = load ptr, ptr %4, align 8, !tbaa !5
  %52 = getelementptr inbounds i8, ptr %51, i64 0
  store i8 0, ptr %52, align 1, !tbaa !11
  br label %58

53:                                               ; preds = %46
  %54 = load ptr, ptr %4, align 8, !tbaa !5
  %55 = load i32, ptr %8, align 4, !tbaa !9
  %56 = zext i32 %55 to i64
  %57 = getelementptr inbounds i8, ptr %54, i64 %56
  store i8 0, ptr %57, align 1, !tbaa !11
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %58

58:                                               ; preds = %53, %50, %17
  %59 = load i32, ptr %7, 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 i32 %59
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local range(i32 0, 2) i32 @Xil_Strcpy(ptr noundef writeonly %0, ptr noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %1, null
  %5 = icmp eq ptr %0, null
  %or.cond = or i1 %5, %4
  %6 = icmp eq i32 %2, 0
  %or.cond3 = or i1 %or.cond, %6
  br i1 %or.cond3, label %18, label %.preheader

.preheader:                                       ; preds = %3
  %7 = load i8, ptr %1, align 1, !tbaa !5
  %.not = icmp eq i8 %7, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %.preheader
  %8 = zext i32 %2 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %9 = phi i8 [ %7, %.lr.ph.preheader ], [ %12, %.lr.ph ]
  %10 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  store i8 %9, ptr %10, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv.next
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = icmp ne i8 %12, 0
  %14 = icmp ult i64 %indvars.iv.next, %8
  %15 = and i1 %14, %13
  br i1 %15, label %.lr.ph, label %._crit_edge.loopexit, !llvm.loop !8

._crit_edge.loopexit:                             ; preds = %.lr.ph
  %16 = trunc nuw i64 %indvars.iv.next to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %.preheader
  %.0.lcssa = phi i32 [ 0, %.preheader ], [ %16, %._crit_edge.loopexit ]
  %.lcssa = phi i64 [ 0, %.preheader ], [ %indvars.iv.next, %._crit_edge.loopexit ]
  %17 = icmp eq i32 %.0.lcssa, %2
  %.sink.idx = select i1 %17, i64 0, i64 %.lcssa
  %.sink = getelementptr inbounds i8, ptr %0, i64 %.sink.idx
  %.020.ph = zext i1 %17 to i32
  store i8 0, ptr %.sink, align 1, !tbaa !5
  br label %18

18:                                               ; preds = %._crit_edge, %3
  %.020 = phi i32 [ 1, %3 ], [ %.020.ph, %._crit_edge ]
  ret i32 %.020
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass