; LLVM IR from stan-dev/math :: lib/tbb_2020.3/src/tbbmalloc (proxy)

; 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"

@_ZL14memoryPageSize = external hidden global i64, align 8

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #0

declare ptr @scalable_aligned_malloc(i64 noundef, i64 noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare hidden void @_ZL12initPageSizev() #2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noalias ptr @pvalloc(i64 noundef %0) #3 personality ptr @__gxx_personality_v0 {
  %2 = alloca i64, align 8
  store i64 %0, ptr %2, align 8, !tbaa !5
  %3 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  %4 = icmp ne i64 %3, 0
  br i1 %4, label %7, label %5

5:                                                ; preds = %1
  invoke void @_ZL12initPageSizev()
          to label %6 unwind label %25

6:                                                ; preds = %5
  br label %7

7:                                                ; preds = %6, %1
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp ne i64 %8, 0
  br i1 %9, label %10, label %17

10:                                               ; preds = %7
  %11 = load i64, ptr %2, align 8, !tbaa !5
  %12 = sub i64 %11, 1
  %13 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  %14 = sub nsw i64 %13, 1
  %15 = or i64 %12, %14
  %16 = add i64 %15, 1
  br label %19

17:                                               ; preds = %7
  %18 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  br label %19

19:                                               ; preds = %17, %10
  %20 = phi i64 [ %16, %10 ], [ %18, %17 ]
  store i64 %20, ptr %2, align 8, !tbaa !5
  %21 = load i64, ptr %2, align 8, !tbaa !5
  %22 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  %23 = invoke ptr @scalable_aligned_malloc(i64 noundef %21, i64 noundef %22)
          to label %24 unwind label %25

24:                                               ; preds = %19
  ret ptr %23

25:                                               ; preds = %19, %5
  %26 = landingpad { ptr, i32 }
          catch ptr null
  %27 = extractvalue { ptr, i32 } %26, 0
  call void @__clang_call_terminate(ptr %27) #4
  unreachable
}

attributes #0 = { noinline noreturn nounwind uwtable "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 = { "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 = { inlinehint 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 #3 = { 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 #4 = { 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 = !{!"long", !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"

@_ZL14memoryPageSize = external hidden local_unnamed_addr global i64, align 8

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) local_unnamed_addr #0

declare ptr @scalable_aligned_malloc(i64 noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare hidden void @_ZL12initPageSizev() local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noalias ptr @pvalloc(i64 noundef %0) local_unnamed_addr #3 personality ptr @__gxx_personality_v0 {
  %2 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %3, label %4

3:                                                ; preds = %1
  tail call void @_ZL12initPageSizev()
  br label %4

4:                                                ; preds = %3, %1
  %.not3 = icmp eq i64 %0, 0
  br i1 %.not3, label %11, label %5

5:                                                ; preds = %4
  %6 = add i64 %0, -1
  %7 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  %8 = add nsw i64 %7, -1
  %9 = or i64 %8, %6
  %10 = add i64 %9, 1
  br label %13

11:                                               ; preds = %4
  %12 = load i64, ptr @_ZL14memoryPageSize, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %11, %5
  %14 = phi i64 [ %7, %5 ], [ %12, %11 ]
  %15 = phi i64 [ %10, %5 ], [ %12, %11 ]
  %16 = invoke ptr @scalable_aligned_malloc(i64 noundef %15, i64 noundef %14)
          to label %17 unwind label %18

17:                                               ; preds = %13
  ret ptr %16

18:                                               ; preds = %13
  %19 = landingpad { ptr, i32 }
          catch ptr null
  %20 = extractvalue { ptr, i32 } %19, 0
  tail call void @__clang_call_terminate(ptr %20) #4
  unreachable
}

attributes #0 = { noinline noreturn nounwind uwtable "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 = { "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 = { inlinehint 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 #3 = { 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 #4 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass