; LLVM IR from simbody/simbody :: Simbody/Visualizer/simbody-visualizer/lodepng.ll (Z18LodePNG_Text_clearP12LodePNG_Text)

; 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.LodePNG_Text = type { i64, ptr, ptr }

; 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: nounwind
declare void @free(ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z18LodePNG_Text_clearP12LodePNG_Text(ptr noundef %0) #2 {
  %2 = alloca ptr, align 8
  %3 = alloca i64, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  store i64 0, ptr %3, align 8, !tbaa !9
  br label %4

4:                                                ; preds = %21, %1
  %5 = load i64, ptr %3, align 8, !tbaa !9
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.LodePNG_Text, ptr %6, i32 0, i32 0
  %8 = load i64, ptr %7, align 8, !tbaa !11
  %9 = icmp ult i64 %5, %8
  br i1 %9, label %10, label %24

10:                                               ; preds = %4
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.LodePNG_Text, ptr %11, i32 0, i32 1
  %13 = load ptr, ptr %12, align 8, !tbaa !13
  %14 = load i64, ptr %3, align 8, !tbaa !9
  %15 = getelementptr inbounds ptr, ptr %13, i64 %14
  call void @_ZL14string_cleanupPPc(ptr noundef %15)
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.LodePNG_Text, ptr %16, i32 0, i32 2
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = load i64, ptr %3, align 8, !tbaa !9
  %20 = getelementptr inbounds ptr, ptr %18, i64 %19
  call void @_ZL14string_cleanupPPc(ptr noundef %20)
  br label %21

21:                                               ; preds = %10
  %22 = load i64, ptr %3, align 8, !tbaa !9
  %23 = add i64 %22, 1
  store i64 %23, ptr %3, align 8, !tbaa !9
  br label %4, !llvm.loop !15

24:                                               ; preds = %4
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.LodePNG_Text, ptr %25, i32 0, i32 1
  %27 = load ptr, ptr %26, align 8, !tbaa !13
  call void @free(ptr noundef %27) #4
  %28 = load ptr, ptr %2, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.LodePNG_Text, ptr %28, i32 0, i32 2
  %30 = load ptr, ptr %29, align 8, !tbaa !14
  call void @free(ptr noundef %30) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare hidden void @_ZL14string_cleanupPPc(ptr noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind "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 = { 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 #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 = { 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, !10, i64 0}
!12 = !{!"_ZTS12LodePNG_Text", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !6, i64 16}
!15 = distinct !{!15, !16}
!16 = !{!"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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z18LodePNG_Text_clearP12LodePNG_Text(ptr nocapture noundef readonly %0) local_unnamed_addr #1 {
  %2 = load i64, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i64 %2, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  br label %5

5:                                                ; preds = %.lr.ph, %5
  %.08 = phi i64 [ 0, %.lr.ph ], [ %10, %5 ]
  %6 = load ptr, ptr %3, align 8, !tbaa !11
  %7 = getelementptr inbounds ptr, ptr %6, i64 %.08
  tail call void @_ZL14string_cleanupPPc(ptr noundef %7)
  %8 = load ptr, ptr %4, align 8, !tbaa !12
  %9 = getelementptr inbounds ptr, ptr %8, i64 %.08
  tail call void @_ZL14string_cleanupPPc(ptr noundef %9)
  %10 = add nuw i64 %.08, 1
  %11 = load i64, ptr %0, align 8, !tbaa !5
  %12 = icmp ult i64 %10, %11
  br i1 %12, label %5, label %._crit_edge, !llvm.loop !13

._crit_edge:                                      ; preds = %5, %1
  %13 = getelementptr inbounds i8, ptr %0, i64 8
  %14 = load ptr, ptr %13, align 8, !tbaa !11
  tail call void @free(ptr noundef %14) #2
  %15 = getelementptr inbounds i8, ptr %0, i64 16
  %16 = load ptr, ptr %15, align 8, !tbaa !12
  tail call void @free(ptr noundef %16) #2
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare hidden void @_ZL14string_cleanupPPc(ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = { 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 #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, !7, i64 0}
!6 = !{!"_ZTS12LodePNG_Text", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass