; LLVM IR from Py-Contributors/AlgorithmsAndDataStructure :: C++/Data Structure/Stacks/evalPostfixStack.ll (Z11createStackj)

; 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"

%class.Stack = type { i32, i32, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z11createStackj(i32 noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %6 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 16) #6
  call void @llvm.memset.p0.i64(ptr align 16 %6, i8 0, i64 16, i1 false)
  store ptr %6, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %4, align 8, !tbaa !9
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %35

10:                                               ; preds = %1
  %11 = load ptr, ptr %4, align 8, !tbaa !9
  %12 = getelementptr inbounds %class.Stack, ptr %11, i32 0, i32 0
  store i32 -1, ptr %12, align 8, !tbaa !11
  %13 = load i32, ptr %3, align 4, !tbaa !5
  %14 = load ptr, ptr %4, align 8, !tbaa !9
  %15 = getelementptr inbounds %class.Stack, ptr %14, i32 0, i32 1
  store i32 %13, ptr %15, align 4, !tbaa !13
  %16 = load ptr, ptr %4, align 8, !tbaa !9
  %17 = getelementptr inbounds %class.Stack, ptr %16, i32 0, i32 1
  %18 = load i32, ptr %17, align 4, !tbaa !13
  %19 = zext i32 %18 to i64
  %20 = mul i64 %19, 4
  %21 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %20, i64 4)
  %22 = extractvalue { i64, i1 } %21, 1
  %23 = extractvalue { i64, i1 } %21, 0
  %24 = select i1 %22, i64 -1, i64 %23
  %25 = call noalias noundef nonnull ptr @_Znam(i64 noundef %24) #6
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  %27 = getelementptr inbounds %class.Stack, ptr %26, i32 0, i32 2
  store ptr %25, ptr %27, align 8, !tbaa !14
  %28 = load ptr, ptr %4, align 8, !tbaa !9
  %29 = getelementptr inbounds %class.Stack, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !14
  %31 = icmp ne ptr %30, null
  br i1 %31, label %33, label %32

32:                                               ; preds = %10
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %35

33:                                               ; preds = %10
  %34 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %34, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %35

35:                                               ; preds = %33, %32, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  %36 = load ptr, ptr %2, align 8
  ret ptr %36
}

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

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #4

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #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 = { nobuiltin allocsize(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 nounwind willreturn memory(argmem: write) }
attributes #4 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS5Stack", !6, i64 0, !6, i64 4, !10, i64 8}
!13 = !{!12, !6, i64 4}
!14 = !{!12, !10, i64 8}


; 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 noalias noundef nonnull ptr @_Z11createStackj(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias noundef nonnull dereferenceable(16) ptr @_Znwm(i64 noundef 16) #2
  store i32 -1, ptr %2, align 8, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %2, i64 4
  store i32 %0, ptr %3, align 4, !tbaa !11
  %4 = zext i32 %0 to i64
  %5 = shl nuw nsw i64 %4, 4
  %6 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %5) #2
  %7 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %6, ptr %7, align 8, !tbaa !12
  ret ptr %2
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #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 = { nobuiltin allocsize(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 = { builtin allocsize(0) }

!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, !7, i64 0}
!6 = !{!"_ZTS5Stack", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}


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