; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN7UString8ReAlloc2Ej)

; 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"

%class.UString = type { ptr, i32, i32 }

@_ZTIi = external constant 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

declare ptr @__cxa_allocate_exception(i64)

declare void @__cxa_throw(ptr, ptr, ptr)

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) #1

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7UString8ReAlloc2Ej(ptr noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) #4 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load ptr, ptr %3, align 8
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp uge i32 %7, 1073741824
  br i1 %8, label %9, label %11

9:                                                ; preds = %2
  %10 = call ptr @__cxa_allocate_exception(i64 4) #5
  store i32 20130221, ptr %10, align 16, !tbaa !9
  call void @__cxa_throw(ptr %10, ptr @_ZTIi, ptr null) #6
  unreachable

11:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #5
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = add i32 %12, 1
  %14 = zext i32 %13 to i64
  %15 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %14, i64 4)
  %16 = extractvalue { i64, i1 } %15, 1
  %17 = extractvalue { i64, i1 } %15, 0
  %18 = select i1 %16, i64 -1, i64 %17
  %19 = call noalias noundef nonnull ptr @_Znam(i64 noundef %18) #7
  store ptr %19, ptr %5, align 8, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds i32, ptr %20, i64 0
  store i32 0, ptr %21, align 4, !tbaa !11
  %22 = getelementptr inbounds %class.UString, ptr %6, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !13
  %24 = icmp eq ptr %23, null
  br i1 %24, label %26, label %25

25:                                               ; preds = %11
  call void @_ZdaPv(ptr noundef %23) #8
  br label %26

26:                                               ; preds = %25, %11
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = getelementptr inbounds %class.UString, ptr %6, i32 0, i32 0
  store ptr %27, ptr %28, align 8, !tbaa !13
  %29 = load i32, ptr %4, align 4, !tbaa !9
  %30 = getelementptr inbounds %class.UString, ptr %6, i32 0, i32 2
  store i32 %29, ptr %30, align 4, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #5
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nobuiltin allocsize(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 = { nobuiltin 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 #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 #5 = { nounwind }
attributes #6 = { noreturn }
attributes #7 = { builtin allocsize(0) }
attributes #8 = { builtin 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 = !{!"wchar_t", !7, i64 0}
!13 = !{!14, !6, i64 0}
!14 = !{!"_ZTS7UString", !6, i64 0, !10, i64 8, !10, i64 12}
!15 = !{!14, !10, i64 12}


; 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"

@_ZTIi = external constant ptr

declare ptr @__cxa_allocate_exception(i64) local_unnamed_addr

declare void @__cxa_throw(ptr, ptr, ptr) local_unnamed_addr

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znam(i64 noundef) local_unnamed_addr #0

; Function Attrs: nobuiltin nounwind
declare void @_ZdaPv(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7UString8ReAlloc2Ej(ptr nocapture noundef nonnull align 8 dereferenceable(16) %0, i32 noundef %1) local_unnamed_addr #2 align 2 {
  %3 = icmp ugt i32 %1, 1073741823
  br i1 %3, label %4, label %6

4:                                                ; preds = %2
  %5 = tail call ptr @__cxa_allocate_exception(i64 4) #3
  store i32 20130221, ptr %5, align 16, !tbaa !5
  tail call void @__cxa_throw(ptr nonnull %5, ptr nonnull @_ZTIi, ptr null) #4
  unreachable

6:                                                ; preds = %2
  %7 = add nuw nsw i32 %1, 1
  %8 = zext nneg i32 %7 to i64
  %9 = shl nuw nsw i64 %8, 2
  %10 = tail call noalias noundef nonnull ptr @_Znam(i64 noundef %9) #5
  store i32 0, ptr %10, align 4, !tbaa !9
  %11 = load ptr, ptr %0, align 8, !tbaa !11
  %12 = icmp eq ptr %11, null
  br i1 %12, label %14, label %13

13:                                               ; preds = %6
  tail call void @_ZdaPv(ptr noundef nonnull %11) #6
  br label %14

14:                                               ; preds = %13, %6
  store ptr %10, ptr %0, align 8, !tbaa !11
  %15 = getelementptr inbounds i8, ptr %0, i64 12
  store i32 %1, ptr %15, align 4, !tbaa !14
  ret void
}

attributes #0 = { nobuiltin allocsize(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 = { nobuiltin 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 = { nounwind }
attributes #4 = { noreturn }
attributes #5 = { builtin allocsize(0) }
attributes #6 = { builtin 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"wchar_t", !7, i64 0}
!11 = !{!12, !13, i64 0}
!12 = !{!"_ZTS7UString", !13, i64 0, !6, i64 8, !6, i64 12}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!12, !6, i64 12}


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