; LLVM IR from theolundqvist/parallax-voxel-ray-marcher :: src/core/LogView.ll (ZN3Log4View8ClearLogEv)

; 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"

@_ZN3Log4View4mLenE = external dso_local global [64 x i32], align 16
@_ZN3Log4View10mBufferPtrE = external dso_local global i32, align 4
@_ZN3Log4View15mScrollToBottomE = external dso_local global i8, align 1

; 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 nounwind uwtable
define dso_local void @_ZN3Log4View8ClearLogEv() #1 align 2 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #2
  store ptr @_ZN3Log4View4mLenE, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #2
  store ptr @_ZN3Log4View4mLenE, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  store ptr getelementptr inbounds (i32, ptr @_ZN3Log4View4mLenE, i64 64), ptr %3, align 8, !tbaa !5
  br label %5

5:                                                ; preds = %13, %0
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = icmp ne ptr %6, %7
  br i1 %8, label %10, label %9

9:                                                ; preds = %5
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #2
  br label %16

10:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %11, ptr %4, align 8, !tbaa !5
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %12, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %13

13:                                               ; preds = %10
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds i32, ptr %14, i32 1
  store ptr %15, ptr %2, align 8, !tbaa !5
  br label %5

16:                                               ; preds = %9
  store i32 0, ptr @_ZN3Log4View10mBufferPtrE, align 4, !tbaa !9
  store i8 1, ptr @_ZN3Log4View15mScrollToBottomE, align 1, !tbaa !11
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"bool", !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"

@_ZN3Log4View4mLenE = external dso_local local_unnamed_addr global [64 x i32], align 16
@_ZN3Log4View10mBufferPtrE = external dso_local local_unnamed_addr global i32, align 4
@_ZN3Log4View15mScrollToBottomE = external dso_local local_unnamed_addr global i8, align 1

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_ZN3Log4View8ClearLogEv() local_unnamed_addr #0 align 2 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(256) @_ZN3Log4View4mLenE, i8 0, i64 256, i1 false), !tbaa !5
  store i32 0, ptr @_ZN3Log4View10mBufferPtrE, align 4, !tbaa !5
  store i8 1, ptr @_ZN3Log4View15mScrollToBottomE, align 1, !tbaa !9
  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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"bool", !7, i64 0}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass