; LLVM IR from chirag-singhal/Coding-Interview-101 :: Miscellaneous/Codechef/feblong/5.ll (Z10getLastDayii)

; 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
declare dso_local noundef zeroext i1 @_Z9checkYeari(i32 noundef) #0

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z10getLastDayii(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) #2
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = call noundef zeroext i1 @_Z9checkYeari(i32 noundef %8)
  %10 = zext i1 %9 to i32
  store i32 %10, ptr %6, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = icmp eq i32 %11, 2
  br i1 %12, label %13, label %17

13:                                               ; preds = %2
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = icmp ne i32 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  store i32 29, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %44

17:                                               ; preds = %13, %2
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 2
  br i1 %19, label %20, label %21

20:                                               ; preds = %17
  store i32 28, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %44

21:                                               ; preds = %17
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = icmp eq i32 %22, 1
  br i1 %23, label %42, label %24

24:                                               ; preds = %21
  %25 = load i32, ptr %4, align 4, !tbaa !5
  %26 = icmp eq i32 %25, 3
  br i1 %26, label %42, label %27

27:                                               ; preds = %24
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = icmp eq i32 %28, 5
  br i1 %29, label %42, label %30

30:                                               ; preds = %27
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = icmp eq i32 %31, 7
  br i1 %32, label %42, label %33

33:                                               ; preds = %30
  %34 = load i32, ptr %4, align 4, !tbaa !5
  %35 = icmp eq i32 %34, 8
  br i1 %35, label %42, label %36

36:                                               ; preds = %33
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = icmp eq i32 %37, 10
  br i1 %38, label %42, label %39

39:                                               ; preds = %36
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = icmp eq i32 %40, 12
  br i1 %41, label %42, label %43

42:                                               ; preds = %39, %36, %33, %30, %27, %24, %21
  store i32 31, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %44

43:                                               ; preds = %39
  store i32 30, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %44

44:                                               ; preds = %43, %42, %20, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %45 = load i32, ptr %3, align 4
  ret i32 %45
}

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 }

!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"}


; 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"

@switch.table._Z10getLastDayii = private unnamed_addr constant [12 x i32] [i32 31, i32 30, i32 31, i32 30, i32 31, i32 30, i32 31, i32 31, i32 30, i32 31, i32 30, i32 31], align 4

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_Z9checkYeari(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 28, 32) i32 @_Z10getLastDayii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = tail call noundef zeroext i1 @_Z9checkYeari(i32 noundef %1)
  %4 = icmp eq i32 %0, 2
  %or.cond = and i1 %4, %3
  %.mux = select i1 %or.cond, i32 29, i32 28
  br i1 %4, label %8, label %5

5:                                                ; preds = %2
  %switch.tableidx = add i32 %0, -1
  %6 = icmp ult i32 %switch.tableidx, 12
  br i1 %6, label %switch.lookup, label %8

switch.lookup:                                    ; preds = %5
  %7 = zext nneg i32 %switch.tableidx to i64
  %switch.gep = getelementptr inbounds [12 x i32], ptr @switch.table._Z10getLastDayii, i64 0, i64 %7
  %switch.load = load i32, ptr %switch.gep, align 4
  br label %8

8:                                                ; preds = %5, %switch.lookup, %2
  %.0 = phi i32 [ %.mux, %2 ], [ %switch.load, %switch.lookup ], [ 30, %5 ]
  ret i32 %.0
}

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" }

!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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass