; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZN8UString28ReAlloc2Ej)

; 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.UString2 = type <{ ptr, i32, [4 x i8] }>

@_ZTIi = external constant ptr

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) #0

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare { i64, i1 } @llvm.umul.with.overflow.i64(i64, i64) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN8UString28ReAlloc2Ej(ptr noundef nonnull align 8 dereferenceable(12) %0, i32 noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp uge i32 %6, 1073741824
  br i1 %7, label %8, label %10

8:                                                ; preds = %2
  %9 = call ptr @__cxa_allocate_exception(i64 4) #3
  store i32 20130221, ptr %9, align 16, !tbaa !9
  call void @__cxa_throw(ptr %9, ptr @_ZTIi, ptr null) #4
  unreachable

10:                                               ; preds = %2
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = add i32 %11, 1
  %13 = zext i32 %12 to i64
  %14 = call { i64, i1 } @llvm.umul.with.overflow.i64(i64 %13, i64 4)
  %15 = extractvalue { i64, i1 } %14, 1
  %16 = extractvalue { i64, i1 } %14, 0
  %17 = select i1 %15, i64 -1, i64 %16
  %18 = call noalias noundef nonnull ptr @_Znam(i64 noundef %17) #5
  %19 = getelementptr inbounds %class.UString2, ptr %5, i32 0, i32 0
  store ptr %18, ptr %19, align 8, !tbaa !11
  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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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) }

!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, !6, i64 0}
!12 = !{!"_ZTS8UString2", !6, i64 0, !10, i64 8}


; 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: mustprogress uwtable
define dso_local void @_ZN8UString28ReAlloc2Ej(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(12) %0, i32 noundef %1) local_unnamed_addr #1 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) #2
  store i32 20130221, ptr %5, align 16, !tbaa !5
  tail call void @__cxa_throw(ptr nonnull %5, ptr nonnull @_ZTIi, ptr null) #3
  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) #4
  store ptr %10, ptr %0, align 8, !tbaa !9
  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 = { 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 #2 = { nounwind }
attributes #3 = { noreturn }
attributes #4 = { builtin allocsize(0) }

!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, !11, i64 0}
!10 = !{!"_ZTS8UString2", !11, i64 0, !6, i64 8}
!11 = !{!"any pointer", !7, i64 0}


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