; LLVM IR from Softmotions/iowow :: src/utils (iwrb)

; 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.iwrp = type { i64, i64, i64, 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

; Function Attrs: nounwind uwtable
define dso_local ptr @iwrb_peek(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.iwrp, ptr %5, i32 0, i32 0
  %7 = load i64, ptr %6, align 8, !tbaa !9
  %8 = icmp eq i64 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %36

10:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.iwrp, ptr %11, i32 0, i32 0
  %13 = load i64, ptr %12, align 8, !tbaa !9
  %14 = icmp sgt i64 %13, 0
  br i1 %14, label %15, label %19

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.iwrp, ptr %16, i32 0, i32 0
  %18 = load i64, ptr %17, align 8, !tbaa !9
  br label %24

19:                                               ; preds = %10
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.iwrp, ptr %20, i32 0, i32 0
  %22 = load i64, ptr %21, align 8, !tbaa !9
  %23 = sub nsw i64 0, %22
  br label %24

24:                                               ; preds = %19, %15
  %25 = phi i64 [ %18, %15 ], [ %23, %19 ]
  store i64 %25, ptr %4, align 8, !tbaa !12
  %26 = load ptr, ptr %3, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.iwrp, ptr %26, i32 0, i32 3
  %28 = load ptr, ptr %27, align 8, !tbaa !13
  %29 = load i64, ptr %4, align 8, !tbaa !12
  %30 = sub i64 %29, 1
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.iwrp, ptr %31, i32 0, i32 2
  %33 = load i64, ptr %32, align 8, !tbaa !14
  %34 = mul i64 %30, %33
  %35 = getelementptr inbounds i8, ptr %28, i64 %34
  store ptr %35, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  br label %36

36:                                               ; preds = %24, %9
  %37 = load ptr, ptr %2, align 8
  ret ptr %37
}

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 }

!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, !11, i64 0}
!10 = !{!"iwrp", !11, i64 0, !11, i64 8, !11, i64 16, !6, i64 24}
!11 = !{!"long", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !6, i64 24}
!14 = !{!10, !11, i64 16}


; 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: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local ptr @iwrb_peek(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i64, ptr %0, align 8, !tbaa !5
  %3 = icmp eq i64 %2, 0
  br i1 %3, label %13, label %4

4:                                                ; preds = %1
  %5 = tail call i64 @llvm.abs.i64(i64 %2, i1 true)
  %6 = getelementptr inbounds i8, ptr %0, i64 24
  %7 = load ptr, ptr %6, align 8, !tbaa !11
  %8 = add nsw i64 %5, -1
  %9 = getelementptr inbounds i8, ptr %0, i64 16
  %10 = load i64, ptr %9, align 8, !tbaa !12
  %11 = mul i64 %10, %8
  %12 = getelementptr inbounds i8, ptr %7, i64 %11
  br label %13

13:                                               ; preds = %1, %4
  %.0 = phi ptr [ %12, %4 ], [ null, %1 ]
  ret ptr %.0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.abs.i64(i64, i1 immarg) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = { nocallback nofree nosync nounwind speculatable 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, !7, i64 0}
!6 = !{!"iwrp", !7, i64 0, !7, i64 8, !7, i64 16, !10, i64 24}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 24}
!12 = !{!6, !7, i64 16}


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