; LLVM IR from int32bit/leetcode :: algorithms/ReverseInteger (test)

; 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: nounwind uwtable
define dso_local i32 @reverse(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !5
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp slt i32 %5, 0
  br i1 %6, label %7, label %10

7:                                                ; preds = %1
  %8 = load i32, ptr %2, align 4, !tbaa !5
  %9 = sub nsw i32 0, %8
  store i32 %9, ptr %2, align 4, !tbaa !5
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %7, %1
  br label %11

11:                                               ; preds = %14, %10
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %23

14:                                               ; preds = %11
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = mul nsw i32 %15, 10
  store i32 %16, ptr %4, align 4, !tbaa !5
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = srem i32 %17, 10
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = add nsw i32 %19, %18
  store i32 %20, ptr %4, align 4, !tbaa !5
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = sdiv i32 %21, 10
  store i32 %22, ptr %2, align 4, !tbaa !5
  br label %11, !llvm.loop !9

23:                                               ; preds = %11
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = icmp ne i32 %24, 0
  br i1 %25, label %26, label %29

26:                                               ; preds = %23
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = sub nsw i32 0, %27
  br label %31

29:                                               ; preds = %23
  %30 = load i32, ptr %4, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %29, %26
  %32 = phi i32 [ %28, %26 ], [ %30, %29 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/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"

; Function Attrs: nofree norecurse nosync nounwind memory(none) uwtable
define dso_local i32 @reverse(i32 noundef %0) local_unnamed_addr #0 {
  %.not15 = icmp eq i32 %0, 0
  br i1 %.not15, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %spec.select = tail call i32 @llvm.abs.i32(i32 %0, i1 true)
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.017 = phi i32 [ %4, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.116 = phi i32 [ %5, %.lr.ph ], [ %spec.select, %.lr.ph.preheader ]
  %2 = mul nsw i32 %.017, 10
  %3 = urem i32 %.116, 10
  %4 = add nsw i32 %2, %3
  %5 = udiv i32 %.116, 10
  %.not = icmp ult i32 %.116, 10
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph, %1
  %.0.lcssa = phi i32 [ 0, %1 ], [ %4, %.lr.ph ]
  %6 = sub nsw i32 0, %.0.lcssa
  %7 = icmp slt i32 %0, 0
  %8 = select i1 %7, i32 %6, i32 %.0.lcssa
  ret i32 %8
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.abs.i32(i32, i1 immarg) #1

attributes #0 = { nofree norecurse nosync nounwind memory(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" }
attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }

!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: GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass