; LLVM IR from hutusi/rethink-c :: test (alloc-testing)

; 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._BlockHeader = type { i32, i64 }

@allocated_bytes = external hidden global i64, align 8
@.str = external hidden unnamed_addr constant [30 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [71 x i8], align 1
@__PRETTY_FUNCTION__.alloc_test_free = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare hidden void @alloc_test_overwrite(ptr noundef, i64 noundef, i32 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @alloc_test_free(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = icmp eq ptr %6, null
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store i32 1, ptr %5, align 4
  br label %31

9:                                                ; preds = %1
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  %11 = call ptr @alloc_test_get_header(ptr noundef %10)
  store ptr %11, ptr %3, align 8, !tbaa !5
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct._BlockHeader, ptr %12, i32 0, i32 1
  %14 = load i64, ptr %13, align 8, !tbaa !9
  store i64 %14, ptr %4, align 8, !tbaa !13
  %15 = load i64, ptr @allocated_bytes, align 8, !tbaa !13
  %16 = load i64, ptr %4, align 8, !tbaa !13
  %17 = icmp uge i64 %15, %16
  br i1 %17, label %18, label %19

18:                                               ; preds = %9
  br label %20

19:                                               ; preds = %9
  call void @__assert_fail(ptr noundef @.str, ptr noundef @.str.1, i32 noundef 160, ptr noundef @__PRETTY_FUNCTION__.alloc_test_free) #5
  unreachable

20:                                               ; preds = %18
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct._BlockHeader, ptr %22, i32 0, i32 1
  %24 = load i64, ptr %23, align 8, !tbaa !9
  call void @alloc_test_overwrite(ptr noundef %21, i64 noundef %24, i32 noundef -559038737)
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct._BlockHeader, ptr %25, i32 0, i32 0
  store i32 0, ptr %26, align 8, !tbaa !14
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %27) #4
  %28 = load i64, ptr %4, align 8, !tbaa !13
  %29 = load i64, ptr @allocated_bytes, align 8, !tbaa !13
  %30 = sub i64 %29, %28
  store i64 %30, ptr @allocated_bytes, align 8, !tbaa !13
  store i32 0, ptr %5, align 4
  br label %31

31:                                               ; preds = %20, %8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  %32 = load i32, ptr %5, align 4
  switch i32 %32, label %34 [
    i32 0, label %33
    i32 1, label %33
  ]

33:                                               ; preds = %31, %31
  ret void

34:                                               ; preds = %31
  unreachable
}

; Function Attrs: nounwind uwtable
declare hidden ptr @alloc_test_get_header(ptr noundef) #1

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr noundef) #2

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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 = { nounwind }
attributes #5 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !12, i64 8}
!10 = !{!"_BlockHeader", !11, i64 0, !12, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!12, !12, i64 0}
!14 = !{!10, !11, i64 0}


; 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"

@allocated_bytes = external hidden local_unnamed_addr global i64, align 8
@.str = external hidden unnamed_addr constant [30 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [71 x i8], align 1
@__PRETTY_FUNCTION__.alloc_test_free = external hidden unnamed_addr constant [29 x i8], align 1

; Function Attrs: nounwind uwtable
declare hidden void @alloc_test_overwrite(ptr noundef, i64 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @alloc_test_free(ptr noundef %0) local_unnamed_addr #0 {
  %2 = icmp eq ptr %0, null
  br i1 %2, label %12, label %3

3:                                                ; preds = %1
  %4 = tail call ptr @alloc_test_get_header(ptr noundef nonnull %0)
  %5 = getelementptr inbounds i8, ptr %4, i64 8
  %6 = load i64, ptr %5, align 8, !tbaa !5
  %7 = load i64, ptr @allocated_bytes, align 8, !tbaa !11
  %.not = icmp ult i64 %7, %6
  br i1 %.not, label %8, label %9

8:                                                ; preds = %3
  tail call void @__assert_fail(ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 160, ptr noundef nonnull @__PRETTY_FUNCTION__.alloc_test_free) #3
  unreachable

9:                                                ; preds = %3
  tail call void @alloc_test_overwrite(ptr noundef nonnull %0, i64 noundef %6, i32 noundef -559038737)
  tail call void @free(ptr noundef nonnull %4) #4
  %10 = load i64, ptr @allocated_bytes, align 8, !tbaa !11
  %11 = sub i64 %10, %6
  store i64 %11, ptr @allocated_bytes, align 8, !tbaa !11
  br label %12

12:                                               ; preds = %1, %9
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden ptr @alloc_test_get_header(ptr noundef) local_unnamed_addr #0

; Function Attrs: noreturn nounwind
declare void @__assert_fail(ptr noundef, ptr noundef, i32 noundef, ptr 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

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 = { 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 #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 = { noreturn nounwind }
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, !10, i64 8}
!6 = !{!"_BlockHeader", !7, i64 0, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!10, !10, i64 0}


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