; LLVM IR from Mohammed-Shoaib/Coding-Problems :: AtCoder/Solutions/abc158_c.ll (Z12tax_increaseii)

; 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 @_Z12tax_increaseii(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
  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
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = sitofp i32 %8 to double
  %10 = fdiv double %9, 8.000000e-02
  %11 = call double @llvm.ceil.f64(double %10)
  %12 = fptosi double %11 to i32
  store i32 %12, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %31, %2
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = sitofp i32 %14 to double
  %16 = fmul double %15, 8.000000e-02
  %17 = fptosi double %16 to i32
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp eq i32 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %13
  store i32 2, ptr %7, align 4
  br label %34

21:                                               ; preds = %13
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = sitofp i32 %22 to double
  %24 = fmul double %23, 1.000000e-01
  %25 = fptosi double %24 to i32
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = icmp eq i32 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %21
  %29 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %29, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %34

30:                                               ; preds = %21
  br label %31

31:                                               ; preds = %30
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !9

34:                                               ; preds = %28, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %35 = load i32, ptr %7, align 4
  switch i32 %35, label %39 [
    i32 2, label %36
    i32 1, label %37
  ]

36:                                               ; preds = %34
  store i32 -1, ptr %3, align 4
  br label %37

37:                                               ; preds = %36, %34
  %38 = load i32, ptr %3, align 4
  ret i32 %38

39:                                               ; preds = %34
  unreachable
}

; 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 speculatable willreturn memory(none)
declare double @llvm.ceil.f64(double) #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 = { 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 = !{!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 norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i32 @_Z12tax_increaseii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sitofp i32 %0 to double
  %4 = fdiv double %3, 8.000000e-02
  %5 = tail call double @llvm.ceil.f64(double %4)
  %6 = fptosi double %5 to i32
  %7 = sitofp i32 %6 to double
  %8 = fmul double %7, 8.000000e-02
  %9 = fptosi double %8 to i32
  %.not11 = icmp eq i32 %9, %0
  br i1 %.not11, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %2, %14
  %10 = phi double [ %16, %14 ], [ %7, %2 ]
  %.0912 = phi i32 [ %15, %14 ], [ %6, %2 ]
  %11 = fmul double %10, 1.000000e-01
  %12 = fptosi double %11 to i32
  %13 = icmp eq i32 %12, %1
  br i1 %13, label %._crit_edge, label %14

14:                                               ; preds = %.lr.ph
  %15 = add nsw i32 %.0912, 1
  %16 = sitofp i32 %15 to double
  %17 = fmul double %16, 8.000000e-02
  %18 = fptosi double %17 to i32
  %.not = icmp eq i32 %18, %0
  br i1 %.not, label %.lr.ph, label %._crit_edge, !llvm.loop !5

._crit_edge:                                      ; preds = %14, %.lr.ph, %2
  %spec.select = phi i32 [ -1, %2 ], [ %.0912, %.lr.ph ], [ -1, %14 ]
  ret i32 %spec.select
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare double @llvm.ceil.f64(double) #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 = { mustprogress 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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