; LLVM IR from kaynewbie/algorithm :: algorithm/LeetCode/Easy (reverse-integer)

; 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
declare dso_local i64 @reverseCore(i64 noundef, ptr noundef) #0

; 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

; 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
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  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
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %8 = load i32, ptr %3, align 4, !tbaa !5
  %9 = icmp sge i32 %8, 0
  %10 = zext i1 %9 to i64
  %11 = select i1 %9, i32 1, i32 -1
  store i32 %11, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = mul nsw i64 %15, %17
  %19 = call i64 @reverseCore(i64 noundef %18, ptr noundef %4)
  %20 = mul nsw i64 %13, %19
  store i64 %20, ptr %6, align 8, !tbaa !9
  %21 = load i64, ptr %6, align 8, !tbaa !9
  %22 = icmp sge i64 %21, -2147483648
  br i1 %22, label %23, label %29

23:                                               ; preds = %1
  %24 = load i64, ptr %6, align 8, !tbaa !9
  %25 = icmp sle i64 %24, 2147483647
  br i1 %25, label %26, label %29

26:                                               ; preds = %23
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = trunc i64 %27 to i32
  store i32 %28, ptr %2, align 4
  store i32 1, ptr %7, align 4
  br label %30

29:                                               ; preds = %23, %1
  store i32 0, ptr %2, align 4
  store i32 1, ptr %7, align 4
  br label %30

30:                                               ; preds = %29, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %31 = load i32, ptr %2, align 4
  ret i32 %31
}

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 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}


; 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: nounwind uwtable
declare dso_local i64 @reverseCore(i64 noundef, ptr noundef) local_unnamed_addr #0

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

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

; Function Attrs: nounwind uwtable
define dso_local i32 @reverse(i32 noundef %0) local_unnamed_addr #0 {
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #2
  store i32 0, ptr %2, align 4, !tbaa !5
  %3 = icmp sgt i32 %0, -1
  %4 = select i1 %3, i64 1, i64 -1
  %5 = sext i32 %0 to i64
  %6 = mul nsw i64 %4, %5
  %7 = call i64 @reverseCore(i64 noundef %6, ptr noundef nonnull %2)
  %8 = mul nsw i64 %7, %4
  %9 = add i64 %8, 2147483648
  %or.cond = icmp ult i64 %9, 4294967296
  %10 = trunc nsw i64 %8 to i32
  %.0 = select i1 %or.cond, i32 %10, i32 0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #2
  ret i32 %.0
}

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 = { mustprogress 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"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass