; LLVM IR from PyCee/NUS_library :: src/strings (NUS_string_group)

; 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"

%struct.NUS_string_group = type { ptr, i32 }

; 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: nounwind uwtable
define dso_local i32 @nus_string_group_string_index(ptr %0, i32 %1, ptr noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca %struct.NUS_string_group, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = getelementptr inbounds { ptr, i32 }, ptr %5, i32 0, i32 0
  store ptr %0, ptr %9, align 8
  %10 = getelementptr inbounds { ptr, i32 }, ptr %5, i32 0, i32 1
  store i32 %1, ptr %10, align 8
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %29, %3
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = getelementptr inbounds %struct.NUS_string_group, ptr %5, i32 0, i32 1
  %14 = load i32, ptr %13, align 8, !tbaa !11
  %15 = icmp ult i32 %12, %14
  br i1 %15, label %16, label %32

16:                                               ; preds = %11
  %17 = getelementptr inbounds %struct.NUS_string_group, ptr %5, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !13
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = zext i32 %19 to i64
  %21 = getelementptr inbounds ptr, ptr %18, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !5
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = call i32 @strcmp(ptr noundef %22, ptr noundef %23) #4
  %25 = icmp eq i32 0, %24
  br i1 %25, label %26, label %28

26:                                               ; preds = %16
  %27 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %27, ptr %4, align 4
  store i32 1, ptr %8, align 4
  br label %33

28:                                               ; preds = %16
  br label %29

29:                                               ; preds = %28
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = add i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !9
  br label %11, !llvm.loop !14

32:                                               ; preds = %11
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %8, align 4
  br label %33

33:                                               ; preds = %32, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %34 = load i32, ptr %4, align 4
  ret i32 %34
}

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 #3 = { nounwind }
attributes #4 = { nounwind willreturn memory(read) }

!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 = !{!12, !10, i64 8}
!12 = !{!"NUS_string_group", !6, i64 0, !10, i64 8}
!13 = !{!12, !6, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

; Function Attrs: nofree nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local i32 @nus_string_group_string_index(ptr nocapture readonly %0, i32 %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %wide.trip.count = zext i32 %1 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %8
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %8 ]
  %4 = getelementptr inbounds ptr, ptr %0, i64 %indvars.iv
  %5 = load ptr, ptr %4, align 8, !tbaa !5
  %6 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %5, ptr noundef nonnull dereferenceable(1) %2) #2
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %._crit_edge.loopexit.split.loop.exit10, label %8

8:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.split.loop.exit10:           ; preds = %.lr.ph
  %9 = trunc nuw i64 %indvars.iv to i32
  br label %._crit_edge

._crit_edge:                                      ; preds = %8, %._crit_edge.loopexit.split.loop.exit10, %3
  %.05 = phi i32 [ -1, %3 ], [ %9, %._crit_edge.loopexit.split.loop.exit10 ], [ -1, %8 ]
  ret i32 %.05
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @strcmp(ptr nocapture noundef, ptr nocapture noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(read, 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 = { 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 = { nounwind willreturn memory(read) }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass