; LLVM IR from humz2k/sugaryc :: ext/bdwgc/extra (gc)

; 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: nocallback nofree nosync nounwind willreturn memory(none)
declare i64 @llvm.expect.i64(i64, i64) #1

; Function Attrs: nounwind allocsize(0) uwtable
declare dso_local noalias ptr @GC_malloc_atomic(i64 noundef) #2

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #3

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #4

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #5

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @GC_strndup(ptr noundef nonnull %0, i64 noundef %1) #6 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #7
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #7
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call i64 @strlen(ptr noundef %9) #8
  store i64 %10, ptr %7, align 8, !tbaa !9
  %11 = load i64, ptr %7, align 8, !tbaa !9
  %12 = load i64, ptr %5, align 8, !tbaa !9
  %13 = icmp ugt i64 %11, %12
  %14 = zext i1 %13 to i32
  %15 = sext i32 %14 to i64
  %16 = call i64 @llvm.expect.i64(i64 %15, i64 0)
  %17 = icmp ne i64 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %2
  %19 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %19, ptr %7, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %18, %2
  %21 = load i64, ptr %7, align 8, !tbaa !9
  %22 = add i64 %21, 1
  %23 = call noalias ptr @GC_malloc_atomic(i64 noundef %22) #9
  store ptr %23, ptr %6, align 8, !tbaa !5
  %24 = load ptr, ptr %6, align 8, !tbaa !5
  %25 = icmp eq ptr null, %24
  %26 = zext i1 %25 to i32
  %27 = sext i32 %26 to i64
  %28 = call i64 @llvm.expect.i64(i64 %27, i64 0)
  %29 = icmp ne i64 %28, 0
  br i1 %29, label %30, label %32

30:                                               ; preds = %20
  %31 = call ptr @__errno_location() #10
  store i32 12, ptr %31, align 4, !tbaa !11
  store ptr null, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %48

32:                                               ; preds = %20
  %33 = load i64, ptr %7, align 8, !tbaa !9
  %34 = icmp ugt i64 %33, 0
  %35 = zext i1 %34 to i32
  %36 = sext i32 %35 to i64
  %37 = call i64 @llvm.expect.i64(i64 %36, i64 1)
  %38 = icmp ne i64 %37, 0
  br i1 %38, label %39, label %43

39:                                               ; preds = %32
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %40, ptr align 1 %41, i64 %42, i1 false)
  br label %43

43:                                               ; preds = %39, %32
  %44 = load ptr, ptr %6, align 8, !tbaa !5
  %45 = load i64, ptr %7, align 8, !tbaa !9
  %46 = getelementptr inbounds i8, ptr %44, i64 %45
  store i8 0, ptr %46, align 1, !tbaa !13
  %47 = load ptr, ptr %6, align 8, !tbaa !5
  store ptr %47, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %48

48:                                               ; preds = %43, %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #7
  %49 = load ptr, ptr %3, align 8
  ret ptr %49
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(none) }
attributes #2 = { nounwind allocsize(0) 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 willreturn memory(read) "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 willreturn memory(none) "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 #5 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #6 = { 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 #7 = { nounwind }
attributes #8 = { nounwind willreturn memory(read) }
attributes #9 = { allocsize(0) }
attributes #10 = { nounwind willreturn memory(none) }

!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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!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: nounwind allocsize(0) uwtable
declare dso_local noalias ptr @GC_malloc_atomic(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #2

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @GC_strndup(ptr nocapture noundef nonnull readonly %0, i64 noundef %1) local_unnamed_addr #4 {
  %3 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #5
  %4 = icmp ugt i64 %3, %1
  br i1 %4, label %5, label %6, !prof !5

5:                                                ; preds = %2
  br label %6

6:                                                ; preds = %5, %2
  %.0 = phi i64 [ %1, %5 ], [ %3, %2 ]
  %7 = add i64 %.0, 1
  %8 = tail call noalias ptr @GC_malloc_atomic(i64 noundef %7) #6
  %9 = icmp eq ptr %8, null
  br i1 %9, label %10, label %12, !prof !5

10:                                               ; preds = %6
  %11 = tail call ptr @__errno_location() #7
  store i32 12, ptr %11, align 4, !tbaa !6
  br label %16

12:                                               ; preds = %6
  %.not = icmp eq i64 %.0, 0
  br i1 %.not, label %14, label %13, !prof !5

13:                                               ; preds = %12
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %8, ptr nonnull align 1 %0, i64 %.0, i1 false)
  br label %14

14:                                               ; preds = %13, %12
  %15 = getelementptr inbounds i8, ptr %8, i64 %.0
  store i8 0, ptr %15, align 1, !tbaa !10
  br label %16

16:                                               ; preds = %14, %10
  ret ptr %8
}

attributes #0 = { nounwind allocsize(0) 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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 nofree nosync nounwind willreturn memory(none) "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 nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { nounwind willreturn memory(read) }
attributes #6 = { allocsize(0) }
attributes #7 = { nounwind willreturn memory(none) }

!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 = !{!"branch_weights", !"expected", i32 1, i32 2000}
!6 = !{!7, !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!8, !8, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,LowerExpectIntrinsicPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass