; LLVM IR from Leet-Us-Code/DSA-A-Z-Practice :: Sid's Levels/Level - 2/Arrays/maxStepsToReachEnd.ll (Z8minJumpsPii)

; 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 noundef i32 @_Z8minJumpsPii(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %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
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds i32, ptr %12, i64 0
  %14 = load i32, ptr %13, align 4, !tbaa !9
  store i32 %14, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds i32, ptr %15, i64 0
  %17 = load i32, ptr %16, align 4, !tbaa !9
  store i32 %17, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 1, ptr %8, align 4, !tbaa !9
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds i32, ptr %18, i64 0
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %23

22:                                               ; preds = %2
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %74

23:                                               ; preds = %2
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = icmp eq i32 %24, 1
  br i1 %25, label %26, label %27

26:                                               ; preds = %23
  store i32 0, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %74

27:                                               ; preds = %23
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 1, ptr %10, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %66, %27
  %29 = load i32, ptr %10, align 4, !tbaa !9
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = icmp slt i32 %29, %30
  br i1 %31, label %33, label %32

32:                                               ; preds = %28
  store i32 2, ptr %9, align 4
  br label %69

33:                                               ; preds = %28
  %34 = load i32, ptr %10, align 4, !tbaa !9
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = sub nsw i32 %35, 1
  %37 = icmp eq i32 %34, %36
  br i1 %37, label %38, label %40

38:                                               ; preds = %33
  %39 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %39, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %69

40:                                               ; preds = %33
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %41 = load i32, ptr %10, align 4, !tbaa !9
  %42 = load ptr, ptr %4, 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 = add nsw i32 %41, %46
  store i32 %47, ptr %11, align 4, !tbaa !9
  %48 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %11)
  %49 = load i32, ptr %48, align 4, !tbaa !9
  store i32 %49, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  %50 = load i32, ptr %7, align 4, !tbaa !9
  %51 = add nsw i32 %50, -1
  store i32 %51, ptr %7, align 4, !tbaa !9
  %52 = load i32, ptr %7, align 4, !tbaa !9
  %53 = icmp eq i32 %52, 0
  br i1 %53, label %54, label %65

54:                                               ; preds = %40
  %55 = load i32, ptr %8, align 4, !tbaa !9
  %56 = add nsw i32 %55, 1
  store i32 %56, ptr %8, align 4, !tbaa !9
  %57 = load i32, ptr %10, align 4, !tbaa !9
  %58 = load i32, ptr %6, align 4, !tbaa !9
  %59 = icmp sge i32 %57, %58
  br i1 %59, label %60, label %61

60:                                               ; preds = %54
  store i32 -1, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %69

61:                                               ; preds = %54
  %62 = load i32, ptr %6, align 4, !tbaa !9
  %63 = load i32, ptr %10, align 4, !tbaa !9
  %64 = sub nsw i32 %62, %63
  store i32 %64, ptr %7, align 4, !tbaa !9
  br label %65

65:                                               ; preds = %61, %40
  br label %66

66:                                               ; preds = %65
  %67 = load i32, ptr %10, align 4, !tbaa !9
  %68 = add nsw i32 %67, 1
  store i32 %68, ptr %10, align 4, !tbaa !9
  br label %28, !llvm.loop !11

69:                                               ; preds = %60, %38, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %70 = load i32, ptr %9, align 4
  switch i32 %70, label %74 [
    i32 2, label %71
  ]

71:                                               ; preds = %69
  br label %72

72:                                               ; preds = %71
  br label %73

73:                                               ; preds = %72
  unreachable

74:                                               ; preds = %69, %26, %22
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %75 = load i32, ptr %3, align 4
  ret i32 %75
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 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 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 #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 nounwind uwtable
define dso_local noundef i32 @_Z8minJumpsPii(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %5 = load i32, ptr %0, align 4, !tbaa !5
  store i32 %5, ptr %3, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %27, label %7

7:                                                ; preds = %2
  %8 = icmp eq i32 %1, 1
  br i1 %8, label %27, label %.preheader

.preheader:                                       ; preds = %7
  %.not2930 = icmp sgt i32 %1, 1
  tail call void @llvm.assume(i1 %.not2930)
  %9 = add nsw i32 %1, -1
  %10 = zext nneg i32 %1 to i64
  %11 = zext nneg i32 %9 to i64
  %12 = icmp eq i32 %9, 1
  br i1 %12, label %._crit_edge, label %.lr.ph46

.lr.ph46:                                         ; preds = %.preheader, %.lr.ph
  %.0213145 = phi i32 [ %.122, %.lr.ph ], [ %5, %.preheader ]
  %.0203244 = phi i32 [ %.1, %.lr.ph ], [ 1, %.preheader ]
  %.not293443 = phi i1 [ %.not29, %.lr.ph ], [ true, %.preheader ]
  %indvars.iv42 = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %.preheader ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #4
  %13 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv42
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = trunc nuw nsw i64 %indvars.iv42 to i32
  %16 = add nsw i32 %14, %15
  store i32 %16, ptr %4, align 4, !tbaa !5
  %17 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %18 = load i32, ptr %17, align 4, !tbaa !5
  store i32 %18, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #4
  %19 = add nsw i32 %.0213145, -1
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %21, label %.lr.ph

21:                                               ; preds = %.lr.ph46
  %22 = sext i32 %18 to i64
  %.not = icmp slt i64 %indvars.iv42, %22
  br i1 %.not, label %23, label %._crit_edge

23:                                               ; preds = %21
  %24 = add nsw i32 %.0203244, 1
  %25 = sub nsw i32 %18, %15
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph46, %23
  %.122 = phi i32 [ %25, %23 ], [ %19, %.lr.ph46 ]
  %.1 = phi i32 [ %24, %23 ], [ %.0203244, %.lr.ph46 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv42, 1
  %.not29 = icmp ult i64 %indvars.iv.next, %10
  %26 = icmp eq i64 %indvars.iv.next, %11
  br i1 %26, label %._crit_edge, label %.lr.ph46

._crit_edge:                                      ; preds = %21, %.lr.ph, %.preheader
  %.not2934.lcssa = phi i1 [ true, %.preheader ], [ %.not293443, %21 ], [ %.not29, %.lr.ph ]
  %.023 = phi i32 [ 1, %.preheader ], [ -1, %21 ], [ %.1, %.lr.ph ]
  call void @llvm.assume(i1 %.not2934.lcssa)
  br label %27

27:                                               ; preds = %7, %2, %._crit_edge
  %.124 = phi i32 [ %.023, %._crit_edge ], [ -1, %2 ], [ 0, %7 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  ret i32 %.124
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #2

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #3

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #3 = { nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write) }
attributes #4 = { 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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass