; LLVM IR from cw1997/ez-rtos :: os (memory)

; 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.memory_node = type { i32, i32, i8, ptr, ptr }

@heap = external dso_local global [4128 x i8], align 16
@memory_all = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @init_memory() #0 {
  store ptr @heap, ptr @memory_all, align 8, !tbaa !5
  %1 = load ptr, ptr @memory_all, align 8, !tbaa !5
  %2 = getelementptr inbounds %struct.memory_node, ptr %1, i32 0, i32 0
  store i32 4096, ptr %2, align 8, !tbaa !9
  %3 = load ptr, ptr @memory_all, align 8, !tbaa !5
  %4 = getelementptr inbounds %struct.memory_node, ptr %3, i32 0, i32 1
  store i32 0, ptr %4, align 4, !tbaa !12
  %5 = load ptr, ptr @memory_all, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.memory_node, ptr %5, i32 0, i32 2
  store i8 0, ptr %6, align 8, !tbaa !13
  %7 = load ptr, ptr @memory_all, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.memory_node, ptr %7, i32 0, i32 3
  store ptr null, ptr %8, align 8, !tbaa !14
  %9 = load ptr, ptr @memory_all, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.memory_node, ptr %9, i32 0, i32 4
  store ptr null, ptr %10, align 8, !tbaa !15
  ret void
}

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" }

!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, !11, i64 0}
!10 = !{!"memory_node", !11, i64 0, !11, i64 4, !7, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!10, !7, i64 8}
!14 = !{!10, !6, i64 16}
!15 = !{!10, !6, i64 24}


; 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"

@heap = external dso_local global [4128 x i8], align 16
@memory_all = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @init_memory() local_unnamed_addr #0 {
  store ptr @heap, ptr @memory_all, align 8, !tbaa !5
  store i32 4096, ptr @heap, align 16, !tbaa !9
  store i32 0, ptr getelementptr inbounds (i8, ptr @heap, i64 4), align 4, !tbaa !12
  store i8 0, ptr getelementptr inbounds (i8, ptr @heap, i64 8), align 8, !tbaa !13
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(16) getelementptr inbounds (i8, ptr @heap, i64 16), i8 0, i64 16, i1 false)
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) 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 nounwind willreturn memory(argmem: write) }

!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, !11, i64 0}
!10 = !{!"memory_node", !11, i64 0, !11, i64 4, !7, i64 8, !6, i64 16, !6, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 4}
!13 = !{!10, !7, i64 8}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,TailCallElimPass