; LLVM IR from MinaFaried3/Assiut-University-Training---Newcomers :: h-sheet5_function/C-WonderfulNumber.ll (Z7converti)

; 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"

@index = external dso_local global i32, align 4
@arr = external dso_local global [100 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z7converti(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %6, %1
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %6, label %16

6:                                                ; preds = %3
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = srem i32 %7, 2
  %9 = load i32, ptr @index, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [100 x i32], ptr @arr, i64 0, i64 %10
  store i32 %8, ptr %11, align 4, !tbaa !5
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = sdiv i32 %12, 2
  store i32 %13, ptr %2, align 4, !tbaa !5
  %14 = load i32, ptr @index, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  store i32 %15, ptr @index, align 4, !tbaa !5
  br label %3, !llvm.loop !9

16:                                               ; preds = %3
  %17 = load i32, ptr @index, align 4, !tbaa !5
  %18 = add nsw i32 %17, -1
  store i32 %18, ptr @index, align 4, !tbaa !5
  ret void
}

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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@index = external dso_local local_unnamed_addr global i32, align 4
@arr = external dso_local local_unnamed_addr global [100 x i32], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z7converti(i32 noundef %0) local_unnamed_addr #0 {
  %index.promoted = load i32, ptr @index, align 4, !tbaa !5
  %.not3 = icmp eq i32 %0, 0
  br i1 %.not3, label %7, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %2 = sext i32 %index.promoted to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %2, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.04 = phi i32 [ %0, %.lr.ph.preheader ], [ %5, %.lr.ph ]
  %3 = srem i32 %.04, 2
  %4 = getelementptr inbounds [100 x i32], ptr @arr, i64 0, i64 %indvars.iv
  store i32 %3, ptr %4, align 4, !tbaa !5
  %5 = sdiv i32 %.04, 2
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %.04.off = add i32 %.04, 1
  %.not = icmp ult i32 %.04.off, 3
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  %6 = trunc nsw i64 %indvars.iv.next to i32
  br label %7

7:                                                ; preds = %._crit_edge, %1
  %8 = phi i32 [ %6, %._crit_edge ], [ %index.promoted, %1 ]
  %9 = add nsw i32 %8, -1
  store i32 %9, ptr @index, align 4, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, 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"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: DSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass