; LLVM IR from Algo-Phantoms/Algo-Tree :: Code/C++/merge_in_constant_space.ll (Z5mergePiS_ii)

; 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 uwtable
define dso_local void @_Z5mergePiS_ii(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) #0 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = sub nsw i32 %12, 1
  store i32 %13, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %56, %4
  %15 = load i32, ptr %9, align 4, !tbaa !9
  %16 = icmp sge i32 %15, 0
  br i1 %16, label %17, label %33

17:                                               ; preds = %14
  %18 = load i32, ptr %10, align 4, !tbaa !9
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %21, label %33

21:                                               ; preds = %17
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i32, ptr %9, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = load i32, ptr %10, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i32, ptr %27, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = icmp sgt i32 %26, %31
  br label %33

33:                                               ; preds = %21, %17, %14
  %34 = phi i1 [ false, %17 ], [ false, %14 ], [ %32, %21 ]
  br i1 %34, label %36, label %35

35:                                               ; preds = %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %61

36:                                               ; preds = %33
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %37 = load ptr, ptr %5, align 8, !tbaa !5
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i32, ptr %37, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !9
  store i32 %41, ptr %11, align 4, !tbaa !9
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = load i32, ptr %10, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds i32, ptr %42, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !9
  %47 = load ptr, ptr %5, align 8, !tbaa !5
  %48 = load i32, ptr %9, align 4, !tbaa !9
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds i32, ptr %47, i64 %49
  store i32 %46, ptr %50, align 4, !tbaa !9
  %51 = load i32, ptr %11, align 4, !tbaa !9
  %52 = load ptr, ptr %6, align 8, !tbaa !5
  %53 = load i32, ptr %10, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %52, i64 %54
  store i32 %51, ptr %55, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %56

56:                                               ; preds = %36
  %57 = load i32, ptr %9, align 4, !tbaa !9
  %58 = add nsw i32 %57, -1
  store i32 %58, ptr %9, align 4, !tbaa !9
  %59 = load i32, ptr %10, align 4, !tbaa !9
  %60 = add nsw i32 %59, 1
  store i32 %60, ptr %10, align 4, !tbaa !9
  br label %14, !llvm.loop !11

61:                                               ; preds = %35
  %62 = load ptr, ptr %5, align 8, !tbaa !5
  %63 = load ptr, ptr %5, align 8, !tbaa !5
  %64 = load i32, ptr %7, align 4, !tbaa !9
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds i32, ptr %63, i64 %65
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef %62, ptr noundef %66)
  %67 = load ptr, ptr %6, align 8, !tbaa !5
  %68 = load ptr, ptr %6, align 8, !tbaa !5
  %69 = load i32, ptr %8, align 4, !tbaa !9
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds i32, ptr %68, i64 %70
  call void @_ZSt4sortIPiEvT_S1_(ptr noundef %67, ptr noundef %71)
  ret void
}

; 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: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) #2

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 #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 = !{!"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 = distinct !{!11, !12}
!12 = !{!"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 uwtable
define dso_local void @_Z5mergePiS_ii(ptr noundef %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %2, 0
  %6 = icmp sgt i32 %3, 0
  %or.cond28 = and i1 %5, %6
  br i1 %or.cond28, label %.lr.ph.preheader, label %.critedge

.lr.ph.preheader:                                 ; preds = %4
  %7 = zext nneg i32 %2 to i64
  %8 = add nsw i32 %3, -1
  %9 = add nsw i32 %2, -1
  %umin = tail call i32 @llvm.umin.i32(i32 %8, i32 %9)
  %10 = add nuw nsw i32 %umin, 1
  %wide.trip.count = zext nneg i32 %10 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %20
  %indvars.iv32 = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next33, %20 ]
  %indvars.iv = phi i64 [ %7, %.lr.ph.preheader ], [ %indvars.iv.next, %20 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %11 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv32
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp sgt i32 %12, %14
  br i1 %15, label %20, label %.critedge

.critedge:                                        ; preds = %.lr.ph, %20, %4
  %16 = sext i32 %2 to i64
  %17 = getelementptr inbounds i32, ptr %0, i64 %16
  tail call void @_ZSt4sortIPiEvT_S1_(ptr noundef %0, ptr noundef %17)
  %18 = sext i32 %3 to i64
  %19 = getelementptr inbounds i32, ptr %1, i64 %18
  tail call void @_ZSt4sortIPiEvT_S1_(ptr noundef %1, ptr noundef %19)
  ret void

20:                                               ; preds = %.lr.ph
  store i32 %14, ptr %11, align 4, !tbaa !5
  store i32 %12, ptr %13, align 4, !tbaa !5
  %indvars.iv.next33 = add nuw nsw i64 %indvars.iv32, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next33, %wide.trip.count
  br i1 %exitcond.not, label %.critedge, label %.lr.ph, !llvm.loop !9
}

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIPiEvT_S1_(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.umin.i32(i32, i32) #2

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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 #2 = { 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 = !{!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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass