; LLVM IR from mncoppola/rpef :: utilities_src/squashfs2.1/lzma/C/Common/StringToInt.ll (Z21ConvertStringToUInt64PKwPS0_)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z21ConvertStringToUInt64PKwPS0_(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %9

9:                                                ; preds = %38, %2
  br label %10

10:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load i32, ptr %11, align 4, !tbaa !11
  store i32 %12, ptr %7, align 4, !tbaa !11
  %13 = load i32, ptr %7, align 4, !tbaa !11
  %14 = icmp slt i32 %13, 48
  br i1 %14, label %18, label %15

15:                                               ; preds = %10
  %16 = load i32, ptr %7, align 4, !tbaa !11
  %17 = icmp sgt i32 %16, 57
  br i1 %17, label %18, label %26

18:                                               ; preds = %15, %10
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = icmp ne ptr %19, null
  br i1 %20, label %21, label %24

21:                                               ; preds = %18
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %22, ptr %23, align 8, !tbaa !5
  br label %24

24:                                               ; preds = %21, %18
  %25 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %25, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %36

26:                                               ; preds = %15
  %27 = load i64, ptr %6, align 8, !tbaa !9
  %28 = mul i64 %27, 10
  store i64 %28, ptr %6, align 8, !tbaa !9
  %29 = load i32, ptr %7, align 4, !tbaa !11
  %30 = sub nsw i32 %29, 48
  %31 = sext i32 %30 to i64
  %32 = load i64, ptr %6, align 8, !tbaa !9
  %33 = add i64 %32, %31
  store i64 %33, ptr %6, align 8, !tbaa !9
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds i32, ptr %34, i32 1
  store ptr %35, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %36

36:                                               ; preds = %26, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  %37 = load i32, ptr %8, align 4
  switch i32 %37, label %39 [
    i32 0, label %38
  ]

38:                                               ; preds = %36
  br label %9, !llvm.loop !13

39:                                               ; preds = %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %40 = load i64, ptr %3, align 8
  ret i64 %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"wchar_t", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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: mustprogress nofree norecurse nosync nounwind memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z21ConvertStringToUInt64PKwPS0_(ptr noundef %0, ptr noundef writeonly %1) local_unnamed_addr #0 {
  %3 = load i32, ptr %0, align 4, !tbaa !5
  %4 = add i32 %3, -48
  %or.cond24 = icmp ult i32 %4, 10
  br i1 %or.cond24, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.016.lcssa = phi ptr [ %0, %2 ], [ %10, %.lr.ph ]
  %.014.lcssa = phi i64 [ 0, %2 ], [ %9, %.lr.ph ]
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %13, label %5

5:                                                ; preds = %._crit_edge
  store ptr %.016.lcssa, ptr %1, align 8, !tbaa !9
  br label %13

.lr.ph:                                           ; preds = %2, %.lr.ph
  %6 = phi i32 [ %12, %.lr.ph ], [ %4, %2 ]
  %.01426 = phi i64 [ %9, %.lr.ph ], [ 0, %2 ]
  %.01625 = phi ptr [ %10, %.lr.ph ], [ %0, %2 ]
  %7 = mul i64 %.01426, 10
  %8 = zext nneg i32 %6 to i64
  %9 = add i64 %7, %8
  %10 = getelementptr inbounds i8, ptr %.01625, i64 4
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = add i32 %11, -48
  %or.cond = icmp ult i32 %12, 10
  br i1 %or.cond, label %.lr.ph, label %._crit_edge, !llvm.loop !11

13:                                               ; preds = %._crit_edge, %5
  ret i64 %.014.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(read, argmem: readwrite, 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" }

!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 = !{!"wchar_t", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass