; LLVM IR from Montimage/mmt-security :: src/lib/mmt_alloc.ll (create_ring)

; 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"

%struct._mmt_mem_pool_struct = type { i32, [12 x i8], i32, [12 x i8], i32, ptr }

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [37 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local ptr @_create_ring(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 ptr @malloc(i64 noundef 48) #6
  store ptr %6, ptr %4, align 8, !tbaa !9
  %7 = load ptr, ptr %4, align 8, !tbaa !9
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %36

10:                                               ; preds = %1
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = load ptr, ptr %4, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %12, i32 0, i32 4
  store i32 %11, ptr %13, align 16, !tbaa !11
  %14 = load ptr, ptr %4, align 8, !tbaa !9
  %15 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %14, i32 0, i32 0
  store i32 0, ptr %15, align 16, !tbaa !13
  %16 = load ptr, ptr %4, align 8, !tbaa !9
  %17 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %16, i32 0, i32 2
  store i32 0, ptr %17, align 16, !tbaa !14
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %18, i32 0, i32 4
  %20 = load i32, ptr %19, align 16, !tbaa !11
  %21 = zext i32 %20 to i64
  %22 = mul i64 8, %21
  %23 = call noalias ptr @malloc(i64 noundef %22) #6
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %24, i32 0, i32 5
  store ptr %23, ptr %25, align 8, !tbaa !15
  %26 = load ptr, ptr %4, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct._mmt_mem_pool_struct, ptr %26, i32 0, i32 5
  %28 = load ptr, ptr %27, align 8, !tbaa !15
  %29 = icmp eq ptr %28, null
  br i1 %29, label %30, label %34

30:                                               ; preds = %10
  %31 = load ptr, ptr %4, align 8, !tbaa !9
  call void @free(ptr noundef %31) #5
  %32 = load ptr, ptr @stderr, align 8, !tbaa !9
  %33 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %32, ptr noundef @.str) #5
  call void @abort() #7
  unreachable

34:                                               ; preds = %10
  %35 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %35, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %36

36:                                               ; preds = %34, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  %37 = load ptr, ptr %2, align 8
  ret ptr %37
}

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #3

; Function Attrs: noreturn nounwind
declare void @abort() #4

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

attributes #0 = { 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 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 = { nounwind "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 #4 = { noreturn nounwind "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 #5 = { nounwind }
attributes #6 = { nounwind allocsize(0) }
attributes #7 = { noreturn 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 32}
!12 = !{!"_mmt_mem_pool_struct", !6, i64 0, !6, i64 16, !6, i64 32, !10, i64 40}
!13 = !{!12, !6, i64 0}
!14 = !{!12, !6, i64 16}
!15 = !{!12, !10, i64 40}


; 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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [37 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noalias noundef ptr @_create_ring(i32 noundef %0) local_unnamed_addr #0 {
  %2 = tail call noalias dereferenceable_or_null(48) ptr @malloc(i64 noundef 48) #5
  %3 = icmp eq ptr %2, null
  br i1 %3, label %15, label %4

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %2, i64 32
  store i32 %0, ptr %5, align 16, !tbaa !5
  store i32 0, ptr %2, align 16, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %2, i64 16
  store i32 0, ptr %6, align 16, !tbaa !12
  %7 = zext i32 %0 to i64
  %8 = shl nuw nsw i64 %7, 3
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #5
  %10 = getelementptr inbounds i8, ptr %2, i64 40
  store ptr %9, ptr %10, align 8, !tbaa !13
  %11 = icmp eq ptr %9, null
  br i1 %11, label %12, label %15

12:                                               ; preds = %4
  tail call void @free(ptr noundef nonnull %2) #6
  %13 = load ptr, ptr @stderr, align 8, !tbaa !14
  %14 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %13, ptr noundef nonnull @.str) #7
  tail call void @abort() #8
  unreachable

15:                                               ; preds = %4, %1
  ret ptr %2
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: noreturn nounwind
declare void @abort() local_unnamed_addr #4

attributes #0 = { 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 nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { nofree nounwind "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 #4 = { noreturn nounwind "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 #5 = { nounwind allocsize(0) }
attributes #6 = { nounwind }
attributes #7 = { cold nounwind }
attributes #8 = { noreturn 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, !7, i64 32}
!6 = !{!"_mmt_mem_pool_struct", !7, i64 0, !7, i64 16, !7, i64 32, !10, i64 40}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !7, i64 16}
!13 = !{!6, !10, i64 40}
!14 = !{!10, !10, i64 0}


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