; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/sorting/Recursive Insertion Sort.ll (Z22insertionSortRecursivePii)

; 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 @_Z22insertionSortRecursivePii(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp sle i32 %7, 1
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  br label %55

10:                                               ; preds = %2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = sub nsw i32 %12, 1
  call void @_Z22insertionSortRecursivePii(ptr noundef %11, i32 noundef %13)
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = sub nsw i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %14, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !9
  store i32 %19, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = sub nsw i32 %20, 2
  store i32 %21, ptr %6, align 4, !tbaa !9
  br label %22

22:                                               ; preds = %35, %10
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = icmp sge i32 %23, 0
  br i1 %24, label %25, label %33

25:                                               ; preds = %22
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = icmp sgt i32 %30, %31
  br label %33

33:                                               ; preds = %25, %22
  %34 = phi i1 [ false, %22 ], [ %32, %25 ]
  br i1 %34, label %35, label %48

35:                                               ; preds = %33
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !9
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !9
  %43 = add nsw i32 %42, 1
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds i32, ptr %41, i64 %44
  store i32 %40, ptr %45, align 4, !tbaa !9
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = add nsw i32 %46, -1
  store i32 %47, ptr %6, align 4, !tbaa !9
  br label %22, !llvm.loop !11

48:                                               ; preds = %33
  %49 = load i32, ptr %5, align 4, !tbaa !9
  %50 = load ptr, ptr %3, align 8, !tbaa !5
  %51 = load i32, ptr %6, align 4, !tbaa !9
  %52 = add nsw i32 %51, 1
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %50, i64 %53
  store i32 %49, ptr %54, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %55

55:                                               ; preds = %48, %9
  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

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 = { 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 nofree nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z22insertionSortRecursivePii(ptr nocapture noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp slt i32 %1, 2
  br i1 %3, label %20, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = add nsw i32 %1, -1
  tail call void @_Z22insertionSortRecursivePii(ptr noundef %0, i32 noundef %4)
  %5 = zext nneg i32 %4 to i64
  %6 = getelementptr inbounds i32, ptr %0, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = add nsw i32 %1, -2
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %13
  %.019 = phi i32 [ %15, %13 ], [ %8, %.lr.ph.preheader ]
  %9 = zext nneg i32 %.019 to i64
  %10 = getelementptr inbounds i32, ptr %0, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, %7
  br i1 %12, label %13, label %.critedge

13:                                               ; preds = %.lr.ph
  %14 = getelementptr inbounds i8, ptr %10, i64 4
  store i32 %11, ptr %14, align 4, !tbaa !5
  %15 = add nsw i32 %.019, -1
  %16 = icmp sgt i32 %.019, 0
  br i1 %16, label %.lr.ph, label %.critedge, !llvm.loop !9

.critedge:                                        ; preds = %.lr.ph, %13
  %.0.lcssa.ph = phi i32 [ %.019, %.lr.ph ], [ -1, %13 ]
  %17 = sext i32 %.0.lcssa.ph to i64
  %18 = getelementptr i32, ptr %0, i64 %17
  %19 = getelementptr i8, ptr %18, i64 4
  store i32 %7, ptr %19, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %2, %.critedge
  ret void
}

attributes #0 = { mustprogress nofree nosync nounwind memory(argmem: readwrite) 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" }

!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: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass