; LLVM IR from avaxar/ccgc :: example (gcTest)

; 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"

declare void @ccgc_dumpPage() #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare ptr @ccgc_malloc(i64 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
define dso_local void @gcTest() #2 {
  %1 = alloca ptr, align 8
  %2 = alloca i32, align 4
  call void @ccgc_dumpPage()
  call void @llvm.lifetime.start.p0(i64 8, ptr %1) #3
  %3 = call ptr @ccgc_malloc(i64 noundef 256)
  store ptr %3, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  store i32 0, ptr %2, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %10, %0
  %5 = load i32, ptr %2, align 4, !tbaa !9
  %6 = icmp slt i32 %5, 5
  br i1 %6, label %8, label %7

7:                                                ; preds = %4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  br label %13

8:                                                ; preds = %4
  %9 = call ptr @ccgc_malloc(i64 noundef 128)
  br label %10

10:                                               ; preds = %8
  %11 = load i32, ptr %2, align 4, !tbaa !9
  %12 = add nsw i32 %11, 1
  store i32 %12, ptr %2, align 4, !tbaa !9
  br label %4, !llvm.loop !11

13:                                               ; preds = %7
  call void @ccgc_dumpPage()
  %14 = call i64 @ccgc_collect()
  call void @ccgc_desegment()
  call void @ccgc_dumpPage()
  call void @llvm.lifetime.end.p0(i64 8, ptr %1) #3
  ret void
}

declare i64 @ccgc_collect() #0

declare void @ccgc_desegment() #0

attributes #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 nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #3 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

declare void @ccgc_dumpPage() local_unnamed_addr #0

declare ptr @ccgc_malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @gcTest() local_unnamed_addr #1 {
  tail call void @ccgc_dumpPage() #2
  %1 = tail call ptr @ccgc_malloc(i64 noundef 256) #2
  %2 = tail call ptr @ccgc_malloc(i64 noundef 128) #2
  %3 = tail call ptr @ccgc_malloc(i64 noundef 128) #2
  %4 = tail call ptr @ccgc_malloc(i64 noundef 128) #2
  %5 = tail call ptr @ccgc_malloc(i64 noundef 128) #2
  %6 = tail call ptr @ccgc_malloc(i64 noundef 128) #2
  tail call void @ccgc_dumpPage() #2
  %7 = tail call i64 @ccgc_collect() #2
  tail call void @ccgc_desegment() #2
  tail call void @ccgc_dumpPage() #2
  ret void
}

declare i64 @ccgc_collect() local_unnamed_addr #0

declare void @ccgc_desegment() local_unnamed_addr #0

attributes #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 = { 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)"}


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