; LLVM IR from zeux/meshoptimizer :: gltf/json.ll/Z6appendRNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPKfm)

; 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"

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

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEf(ptr noundef nonnull align 8 dereferenceable(32), float noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPKfm(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %8, i8 noundef signext 91)
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %10

10:                                               ; preds = %27, %3
  %11 = load i64, ptr %7, align 8, !tbaa !9
  %12 = load i64, ptr %6, align 8, !tbaa !9
  %13 = icmp ult i64 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  br label %30

15:                                               ; preds = %10
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %21

18:                                               ; preds = %15
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %19, i8 noundef signext 44)
  br label %21

21:                                               ; preds = %18, %15
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = getelementptr inbounds float, ptr %23, i64 %24
  %26 = load float, ptr %25, align 4, !tbaa !11
  call void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEf(ptr noundef nonnull align 8 dereferenceable(32) %22, float noundef %26)
  br label %27

27:                                               ; preds = %21
  %28 = load i64, ptr %7, align 8, !tbaa !9
  %29 = add i64 %28, 1
  store i64 %29, ptr %7, align 8, !tbaa !9
  br label %10, !llvm.loop !13

30:                                               ; preds = %14
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %31, i8 noundef signext 93)
  ret void
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) #1 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; 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 uwtable
declare dso_local void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEf(ptr noundef nonnull align 8 dereferenceable(32), float noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEPKfm(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext 91)
  %.not10 = icmp eq i64 %2, 0
  br i1 %.not10, label %._crit_edge, label %.lr.ph.preheader._crit_edge

.lr.ph.preheader._crit_edge:                      ; preds = %3
  %.pre = load float, ptr %1, align 4, !tbaa !5
  tail call void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEf(ptr noundef nonnull align 8 dereferenceable(32) %0, float noundef %.pre)
  %exitcond.peel.not = icmp eq i64 %2, 1
  br i1 %exitcond.peel.not, label %._crit_edge, label %.lr.ph.peel.next

._crit_edge:                                      ; preds = %.lr.ph.peel.next, %.lr.ph.preheader._crit_edge, %3
  %5 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext 93)
  ret void

.lr.ph.peel.next:                                 ; preds = %.lr.ph.preheader._crit_edge, %.lr.ph.peel.next
  %.09 = phi i64 [ %9, %.lr.ph.peel.next ], [ 1, %.lr.ph.preheader._crit_edge ]
  %6 = tail call noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32) %0, i8 noundef signext 44)
  %7 = getelementptr inbounds float, ptr %1, i64 %.09
  %8 = load float, ptr %7, align 4, !tbaa !5
  tail call void @_Z6appendRNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEf(ptr noundef nonnull align 8 dereferenceable(32) %0, float noundef %8)
  %9 = add nuw i64 %.09, 1
  %exitcond.not = icmp eq i64 %9, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph.peel.next, !llvm.loop !9
}

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEpLEc(ptr noundef nonnull align 8 dereferenceable(32), i8 noundef signext) local_unnamed_addr #0 align 2

attributes #0 = { mustprogress 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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10, !11}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.peeled.count", i32 1}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopFullUnrollPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass