; LLVM IR from erwincoumans/tiny-differentiable-simulator :: third_party/crossguid/guid.ll (ZN2xg4GuidC2Ev)

; 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.xg::Guid" = type { %"struct.std::array" }
%"struct.std::array" = type { [16 x i8] }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN2xg4GuidC2Ev(ptr noundef nonnull align 1 dereferenceable(16) %0) unnamed_addr #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.xg::Guid", ptr %3, i32 0, i32 0
  %5 = getelementptr inbounds %"struct.std::array", ptr %4, i32 0, i32 0
  store i8 0, ptr %5, align 1, !tbaa !9
  %6 = getelementptr inbounds i8, ptr %5, i64 1
  %7 = getelementptr inbounds i8, ptr %5, i64 16
  br label %8

8:                                                ; preds = %8, %1
  %9 = phi ptr [ %6, %1 ], [ %10, %8 ]
  store i8 0, ptr %9, align 1, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %9, i64 1
  %11 = icmp eq ptr %10, %7
  br i1 %11, label %12, label %8

12:                                               ; preds = %8
  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 = !{!7, !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: write) uwtable
define dso_local void @_ZN2xg4GuidC2Ev(ptr nocapture noundef nonnull writeonly align 1 dereferenceable(16) %0) unnamed_addr #0 align 2 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 1 dereferenceable(16) %0, 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(argmem: write) 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)"}


; Effective O3 passes: EarlyCSEPass,GVNPass,IndVarSimplifyPass,InstCombinePass,LoopIdiomRecognizePass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass