; LLVM IR from Dev-XYS/Algorithms :: High-Precision(Integer).ll (ZN4lint9nextshortEi)

; 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.lint = type { i32, i32, ptr, ptr }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_ZN4lint3maxEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN4lint9nextshortEi(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1) #0 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sub nsw i32 %8, 3
  %10 = call noundef i32 @_ZN4lint3maxEii(ptr noundef nonnull align 8 dereferenceable(24) %7, i32 noundef %9, i32 noundef 0)
  store i32 %10, ptr %6, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %28, %2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = icmp sle i32 %12, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %31

16:                                               ; preds = %11
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = mul nsw i32 %17, 10
  %19 = getelementptr inbounds %class.lint, ptr %7, i32 0, i32 3
  %20 = load ptr, ptr %19, align 8, !tbaa !11
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !13
  %25 = sext i8 %24 to i32
  %26 = sub nsw i32 %25, 48
  %27 = add nsw i32 %18, %26
  store i32 %27, ptr %5, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %16
  %29 = load i32, ptr %6, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %6, align 4, !tbaa !9
  br label %11, !llvm.loop !14

31:                                               ; preds = %15
  %32 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %32
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 16}
!12 = !{!"_ZTS4lint", !10, i64 0, !10, i64 4, !6, i64 8, !6, i64 16}
!13 = !{!7, !7, i64 0}
!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 nounwind uwtable
declare dso_local noundef i32 @_ZN4lint3maxEii(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef, i32 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZN4lint9nextshortEi(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1) local_unnamed_addr #0 align 2 {
  %3 = add nsw i32 %1, -3
  %4 = tail call noundef i32 @_ZN4lint3maxEii(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %3, i32 noundef 0)
  %.not8 = icmp sgt i32 %4, %1
  br i1 %.not8, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = sext i32 %4 to i64
  %8 = add i32 %1, 1
  %9 = sub i32 %8, %4
  %10 = sub i32 %1, %4
  %xtraiter = and i32 %9, 3
  %11 = icmp ult i32 %10, 3
  br i1 %11, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i32 %9, -4
  %invariant.gep = getelementptr i8, ptr %6, i64 1
  %invariant.gep15 = getelementptr i8, ptr %6, i64 2
  %invariant.gep17 = getelementptr i8, ptr %6, i64 3
  br label %18

._crit_edge.loopexit.unr-lcssa:                   ; preds = %18, %.lr.ph
  %.lcssa.ph = phi i32 [ poison, %.lr.ph ], [ %39, %18 ]
  %indvars.iv.unr = phi i64 [ %7, %.lr.ph ], [ %indvars.iv.next.3, %18 ]
  %.079.unr = phi i32 [ 0, %.lr.ph ], [ %39, %18 ]
  %lcmp.mod.not = icmp eq i32 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.epil.preheader ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %.079.epil = phi i32 [ %17, %.epil.preheader ], [ %.079.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i32 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %12 = mul nsw i32 %.079.epil, 10
  %13 = getelementptr inbounds i8, ptr %6, i64 %indvars.iv.epil
  %14 = load i8, ptr %13, align 1, !tbaa !11
  %15 = sext i8 %14 to i32
  %16 = add i32 %12, -48
  %17 = add i32 %16, %15
  %indvars.iv.next.epil = add nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i32 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i32 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.epil.preheader, !llvm.loop !12

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %2
  %.07.lcssa = phi i32 [ 0, %2 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %17, %.epil.preheader ]
  ret i32 %.07.lcssa

18:                                               ; preds = %18, %.lr.ph.new
  %indvars.iv = phi i64 [ %7, %.lr.ph.new ], [ %indvars.iv.next.3, %18 ]
  %.079 = phi i32 [ 0, %.lr.ph.new ], [ %39, %18 ]
  %niter = phi i32 [ 0, %.lr.ph.new ], [ %niter.next.3, %18 ]
  %19 = mul nsw i32 %.079, 10
  %20 = getelementptr inbounds i8, ptr %6, i64 %indvars.iv
  %21 = load i8, ptr %20, align 1, !tbaa !11
  %22 = sext i8 %21 to i32
  %23 = add i32 %19, -48
  %24 = add i32 %23, %22
  %25 = mul nsw i32 %24, 10
  %gep = getelementptr i8, ptr %invariant.gep, i64 %indvars.iv
  %26 = load i8, ptr %gep, align 1, !tbaa !11
  %27 = sext i8 %26 to i32
  %28 = add i32 %25, -48
  %29 = add i32 %28, %27
  %30 = mul nsw i32 %29, 10
  %gep16 = getelementptr i8, ptr %invariant.gep15, i64 %indvars.iv
  %31 = load i8, ptr %gep16, align 1, !tbaa !11
  %32 = sext i8 %31 to i32
  %33 = add i32 %30, -48
  %34 = add i32 %33, %32
  %35 = mul nsw i32 %34, 10
  %gep18 = getelementptr i8, ptr %invariant.gep17, i64 %indvars.iv
  %36 = load i8, ptr %gep18, align 1, !tbaa !11
  %37 = sext i8 %36 to i32
  %38 = add i32 %35, -48
  %39 = add i32 %38, %37
  %indvars.iv.next.3 = add nsw i64 %indvars.iv, 4
  %niter.next.3 = add i32 %niter, 4
  %niter.ncmp.3 = icmp eq i32 %niter.next.3, %unroll_iter
  br i1 %niter.ncmp.3, label %._crit_edge.loopexit.unr-lcssa, label %18, !llvm.loop !14
}

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, !10, i64 16}
!6 = !{!"_ZTS4lint", !7, i64 0, !7, i64 4, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!8, !8, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.unroll.disable"}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass