; LLVM IR from mncoppola/rpef :: utilities_src/squashfs2.1/lzma/C/Common/StringToInt.ll (Z21ConvertStringToUInt64PKcPS0_)

; 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: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z21ConvertStringToUInt64PKcPS0_(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i8, align 1
  %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 = %41, %2
  br label %10

10:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !11
  store i8 %12, ptr %7, align 1, !tbaa !11
  %13 = load i8, ptr %7, align 1, !tbaa !11
  %14 = sext i8 %13 to i32
  %15 = icmp slt i32 %14, 48
  br i1 %15, label %20, label %16

16:                                               ; preds = %10
  %17 = load i8, ptr %7, align 1, !tbaa !11
  %18 = sext i8 %17 to i32
  %19 = icmp sgt i32 %18, 57
  br i1 %19, label %20, label %28

20:                                               ; preds = %16, %10
  %21 = load ptr, ptr %5, align 8, !tbaa !5
  %22 = icmp ne ptr %21, null
  br i1 %22, label %23, label %26

23:                                               ; preds = %20
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %24, ptr %25, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %23, %20
  %27 = load i64, ptr %6, align 8, !tbaa !9
  store i64 %27, ptr %3, align 8
  store i32 1, ptr %8, align 4
  br label %39

28:                                               ; preds = %16
  %29 = load i64, ptr %6, align 8, !tbaa !9
  %30 = mul i64 %29, 10
  store i64 %30, ptr %6, align 8, !tbaa !9
  %31 = load i8, ptr %7, align 1, !tbaa !11
  %32 = sext i8 %31 to i32
  %33 = sub nsw i32 %32, 48
  %34 = sext i32 %33 to i64
  %35 = load i64, ptr %6, align 8, !tbaa !9
  %36 = add i64 %35, %34
  store i64 %36, ptr %6, align 8, !tbaa !9
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds i8, ptr %37, i32 1
  store ptr %38, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %8, align 4
  br label %39

39:                                               ; preds = %28, %26
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  %40 = load i32, ptr %8, align 4
  switch i32 %40, label %42 [
    i32 0, label %41
  ]

41:                                               ; preds = %39
  br label %9, !llvm.loop !12

42:                                               ; preds = %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %43 = load i64, ptr %3, align 8
  ret i64 %43
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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 @_Z21ConvertStringToUInt64PKcPS0_(ptr noundef %0, ptr noundef writeonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1, !tbaa !5
  %4 = add i8 %3, -48
  %or.cond25 = icmp ult i8 %4, 10
  br i1 %or.cond25, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.017.lcssa = phi ptr [ %0, %2 ], [ %11, %.lr.ph ]
  %.015.lcssa = phi i64 [ 0, %2 ], [ %10, %.lr.ph ]
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %14, label %5

5:                                                ; preds = %._crit_edge
  store ptr %.017.lcssa, ptr %1, align 8, !tbaa !8
  br label %14

.lr.ph:                                           ; preds = %2, %.lr.ph
  %6 = phi i8 [ %12, %.lr.ph ], [ %3, %2 ]
  %.01527 = phi i64 [ %10, %.lr.ph ], [ 0, %2 ]
  %.01726 = phi ptr [ %11, %.lr.ph ], [ %0, %2 ]
  %7 = mul i64 %.01527, 10
  %8 = and i8 %6, 15
  %9 = zext nneg i8 %8 to i64
  %10 = add i64 %7, %9
  %11 = getelementptr inbounds i8, ptr %.01726, i64 1
  %12 = load i8, ptr %11, align 1, !tbaa !5
  %13 = add i8 %12, -48
  %or.cond = icmp ult i8 %13, 10
  br i1 %or.cond, label %.lr.ph, label %._crit_edge, !llvm.loop !10

14:                                               ; preds = %._crit_edge, %5
  ret i64 %.015.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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


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