; LLVM IR from stan-dev/math :: lib/boost_1.84.0/libs/container/src (monotonic_buffer_resource)

; 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.boost::container::pmr::monotonic_buffer_resource" = type { %"class.boost::container::pmr::memory_resource", %"class.boost::container::pmr::block_slist", ptr, i64, i64, ptr, i64 }
%"class.boost::container::pmr::memory_resource" = type { ptr }
%"class.boost::container::pmr::block_slist" = type { %"class.boost::container::pmr::block_slist_base", ptr }
%"class.boost::container::pmr::block_slist_base" = type { %"struct.boost::container::pmr::slist_node" }
%"struct.boost::container::pmr::slist_node" = type { ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN5boost9container3pmr25monotonic_buffer_resource20increase_next_bufferEv(ptr noundef nonnull align 8 dereferenceable(64) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %"class.boost::container::pmr::monotonic_buffer_resource", ptr %3, i32 0, i32 4
  %5 = load i64, ptr %4, align 8, !tbaa !9
  %6 = icmp ult i64 9223372036854775807, %5
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  br label %12

8:                                                ; preds = %1
  %9 = getelementptr inbounds %"class.boost::container::pmr::monotonic_buffer_resource", ptr %3, i32 0, i32 4
  %10 = load i64, ptr %9, align 8, !tbaa !9
  %11 = mul i64 %10, 2
  br label %12

12:                                               ; preds = %8, %7
  %13 = phi i64 [ -1, %7 ], [ %11, %8 ]
  %14 = getelementptr inbounds %"class.boost::container::pmr::monotonic_buffer_resource", ptr %3, i32 0, i32 4
  store i64 %13, ptr %14, align 8, !tbaa !9
  ret void
}

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)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !15, i64 40}
!10 = !{!"_ZTSN5boost9container3pmr25monotonic_buffer_resourceE", !11, i64 0, !12, i64 8, !6, i64 24, !15, i64 32, !15, i64 40, !6, i64 48, !15, i64 56}
!11 = !{!"_ZTSN5boost9container3pmr15memory_resourceE"}
!12 = !{!"_ZTSN5boost9container3pmr11block_slistE", !13, i64 0, !6, i64 8}
!13 = !{!"_ZTSN5boost9container3pmr16block_slist_baseINS1_18block_slist_headerEEE", !14, i64 0}
!14 = !{!"_ZTSN5boost9container3pmr10slist_nodeE", !6, i64 0}
!15 = !{!"long", !7, 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) uwtable
define dso_local void @_ZN5boost9container3pmr25monotonic_buffer_resource20increase_next_bufferEv(ptr nocapture noundef nonnull align 8 dereferenceable(64) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 40
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %4 = shl nuw i64 %3, 1
  %.inv = icmp sgt i64 %3, -1
  %spec.select = select i1 %.inv, i64 %4, i64 -1
  store i64 %spec.select, ptr %2, align 8, !tbaa !5
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: readwrite) 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)"}
!5 = !{!6, !14, i64 40}
!6 = !{!"_ZTSN5boost9container3pmr25monotonic_buffer_resourceE", !7, i64 0, !8, i64 8, !11, i64 24, !14, i64 32, !14, i64 40, !11, i64 48, !14, i64 56}
!7 = !{!"_ZTSN5boost9container3pmr15memory_resourceE"}
!8 = !{!"_ZTSN5boost9container3pmr11block_slistE", !9, i64 0, !11, i64 8}
!9 = !{!"_ZTSN5boost9container3pmr16block_slist_baseINS1_18block_slist_headerEEE", !10, i64 0}
!10 = !{!"_ZTSN5boost9container3pmr10slist_nodeE", !11, i64 0}
!11 = !{!"any pointer", !12, i64 0}
!12 = !{!"omnipotent char", !13, i64 0}
!13 = !{!"Simple C++ TBAA"}
!14 = !{!"long", !12, i64 0}


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