; LLVM IR from TLE-MEC/Hack-CP-DSA :: Codechef/Maximum Array Xor/solution.ll (Z5solvexx)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z5solvexx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store i64 %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %8 = load i64, ptr %4, align 8, !tbaa !5
  %9 = trunc i64 %8 to i32
  %10 = shl i32 1, %9
  %11 = sext i32 %10 to i64
  store i64 %11, ptr %6, align 8, !tbaa !5
  %12 = load i64, ptr %5, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !5
  %14 = sdiv i64 %13, 2
  %15 = icmp sge i64 %12, %14
  br i1 %15, label %16, label %23

16:                                               ; preds = %2
  %17 = load i64, ptr %6, align 8, !tbaa !5
  %18 = sdiv i64 %17, 2
  %19 = mul nsw i64 2, %18
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = sub nsw i64 %20, 1
  %22 = mul nsw i64 %19, %21
  store i64 %22, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %29

23:                                               ; preds = %2
  %24 = load i64, ptr %5, align 8, !tbaa !5
  %25 = mul nsw i64 2, %24
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = sub nsw i64 %26, 1
  %28 = mul nsw i64 %25, %27
  store i64 %28, ptr %3, align 8
  store i32 1, ptr %7, align 4
  br label %29

29:                                               ; preds = %23, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %30 = load i64, ptr %3, align 8
  ret i64 %30
}

; 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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 nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @_Z5solvexx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = trunc i64 %0 to i32
  %4 = shl nuw i32 1, %3
  %5 = sext i32 %4 to i64
  %6 = sdiv i32 %4, 2
  %.sext = sext i32 %6 to i64
  %7 = add nsw i64 %5, -1
  %..sext = tail call i64 @llvm.smin.i64(i64 %.sext, i64 %1)
  %8 = shl nsw i64 %..sext, 1
  %9 = mul nsw i64 %8, %7
  ret i64 %9
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.smin.i64(i64, i64) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn 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)"}


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