; LLVM IR from andreimaximov/algorithms :: hacker-rank/algorithms/bit-manipulation/and-product/main.ll (Z7productjj)

; 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 i32 @_Z7productjj(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %10 = load i32, ptr %4, align 4, !tbaa !5
  %11 = uitofp i32 %10 to double
  %12 = call double @log2(double noundef %11) #3
  %13 = fptoui double %12 to i32
  store i32 %13, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = uitofp i32 %14 to double
  %16 = call double @log2(double noundef %15) #3
  %17 = fptoui double %16 to i32
  store i32 %17, ptr %7, align 4, !tbaa !5
  %18 = load i32, ptr %7, align 4, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = add i32 %19, 1
  %21 = icmp uge i32 %18, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %37

23:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %24 = load i32, ptr %4, align 4, !tbaa !5
  store i32 %24, ptr %9, align 4, !tbaa !5
  br label %25

25:                                               ; preds = %29, %23
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = icmp ult i32 %26, %27
  br i1 %28, label %29, label %35

29:                                               ; preds = %25
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = add i32 %30, 1
  store i32 %31, ptr %4, align 4, !tbaa !5
  %32 = load i32, ptr %9, align 4, !tbaa !5
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = and i32 %32, %33
  store i32 %34, ptr %9, align 4, !tbaa !5
  br label %25, !llvm.loop !9

35:                                               ; preds = %25
  %36 = load i32, ptr %9, align 4, !tbaa !5
  store i32 %36, ptr %3, align 4
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %37

37:                                               ; preds = %35, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %38 = load i32, ptr %3, align 4
  ret i32 %38
}

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

; Function Attrs: nounwind
declare double @log2(double noundef) #2

; 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 "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 #3 = { 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++ 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: mustprogress nofree nounwind memory(write) uwtable
define dso_local noundef i32 @_Z7productjj(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = uitofp i32 %0 to double
  %4 = tail call double @log2(double noundef %3) #3
  %5 = fptoui double %4 to i32
  %6 = uitofp i32 %1 to double
  %7 = tail call double @log2(double noundef %6) #3
  %8 = fptoui double %7 to i32
  %9 = add i32 %5, 1
  %.not = icmp ugt i32 %9, %8
  br i1 %.not, label %.preheader, label %.loopexit

.preheader:                                       ; preds = %2
  %10 = icmp ult i32 %0, %1
  br i1 %10, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %.preheader
  %11 = sub i32 %1, %0
  %min.iters.check = icmp ult i32 %11, 8
  br i1 %min.iters.check, label %.lr.ph.preheader18, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i32 %11, -8
  %ind.end = add i32 %n.vec, %0
  %12 = insertelement <4 x i32> <i32 poison, i32 -1, i32 -1, i32 -1>, i32 %0, i64 0
  %.splatinsert = insertelement <4 x i32> poison, i32 %0, i64 0
  %.splat = shufflevector <4 x i32> %.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  %induction = add <4 x i32> %.splat, <i32 0, i32 1, i32 2, i32 3>
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %12, %vector.ph ], [ %15, %vector.body ]
  %vec.phi16 = phi <4 x i32> [ <i32 -1, i32 -1, i32 -1, i32 -1>, %vector.ph ], [ %16, %vector.body ]
  %vec.ind = phi <4 x i32> [ %induction, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %13 = add nuw <4 x i32> %vec.ind, <i32 1, i32 1, i32 1, i32 1>
  %14 = add <4 x i32> %vec.ind, <i32 5, i32 5, i32 5, i32 5>
  %15 = and <4 x i32> %vec.phi, %13
  %16 = and <4 x i32> %vec.phi16, %14
  %index.next = add nuw i32 %index, 8
  %vec.ind.next = add <4 x i32> %vec.ind, <i32 8, i32 8, i32 8, i32 8>
  %17 = icmp eq i32 %index.next, %n.vec
  br i1 %17, label %middle.block, label %vector.body, !llvm.loop !5

middle.block:                                     ; preds = %vector.body
  %bin.rdx = and <4 x i32> %16, %15
  %18 = tail call i32 @llvm.vector.reduce.and.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i32 %11, %n.vec
  br i1 %cmp.n, label %.loopexit, label %.lr.ph.preheader18

.lr.ph.preheader18:                               ; preds = %middle.block, %.lr.ph.preheader
  %.015.ph = phi i32 [ %0, %.lr.ph.preheader ], [ %18, %middle.block ]
  %.01314.ph = phi i32 [ %0, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader18, %.lr.ph
  %.015 = phi i32 [ %20, %.lr.ph ], [ %.015.ph, %.lr.ph.preheader18 ]
  %.01314 = phi i32 [ %19, %.lr.ph ], [ %.01314.ph, %.lr.ph.preheader18 ]
  %19 = add nuw i32 %.01314, 1
  %20 = and i32 %.015, %19
  %exitcond.not = icmp eq i32 %19, %1
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !9

.loopexit:                                        ; preds = %.lr.ph, %middle.block, %.preheader, %2
  %.012 = phi i32 [ 0, %2 ], [ %0, %.preheader ], [ %18, %middle.block ], [ %20, %.lr.ph ]
  ret i32 %.012
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare double @log2(double noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.and.v4i32(<4 x i32>) #2

attributes #0 = { mustprogress nofree nounwind memory(write) 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 nofree nounwind willreturn memory(write) "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 #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { 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 = distinct !{!5, !6, !7, !8}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!"llvm.loop.isvectorized", i32 1}
!8 = !{!"llvm.loop.unroll.runtime.disable"}
!9 = distinct !{!9, !6, !8, !7}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass