; LLVM IR from mncoppola/rpef :: utilities_src/squashfs2.1/lzma/C/7zip/Archive/7z_C (7zIn)

; 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: nounwind uwtable
declare dso_local i32 @SzReadByte(ptr noundef, ptr noundef) #1

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

11:                                               ; preds = %29, %3
  %12 = load i64, ptr %8, align 8, !tbaa !9
  %13 = load i64, ptr %7, align 8, !tbaa !9
  %14 = icmp ult i64 %12, %13
  br i1 %14, label %15, label %32

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %6, align 8, !tbaa !5
  %18 = load i64, ptr %8, align 8, !tbaa !9
  %19 = getelementptr inbounds i8, ptr %17, i64 %18
  %20 = call i32 @SzReadByte(ptr noundef %16, ptr noundef %19)
  store i32 %20, ptr %9, align 4, !tbaa !11
  %21 = load i32, ptr %9, align 4, !tbaa !11
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %25

23:                                               ; preds = %15
  %24 = load i32, ptr %9, align 4, !tbaa !11
  store i32 %24, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %26

25:                                               ; preds = %15
  store i32 0, ptr %10, align 4
  br label %26

26:                                               ; preds = %25, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  %27 = load i32, ptr %10, align 4
  switch i32 %27, label %33 [
    i32 0, label %28
  ]

28:                                               ; preds = %26
  br label %29

29:                                               ; preds = %28
  %30 = load i64, ptr %8, align 8, !tbaa !9
  %31 = add i64 %30, 1
  store i64 %31, ptr %8, align 8, !tbaa !9
  br label %11, !llvm.loop !13

32:                                               ; preds = %11
  store i32 0, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %33

33:                                               ; preds = %32, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  %34 = load i32, ptr %4, align 4
  ret i32 %34
}

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, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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: nounwind uwtable
declare dso_local i32 @SzReadByte(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @SzReadBytes(ptr noundef %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not15 = icmp eq i64 %2, 0
  br i1 %.not15, label %._crit_edge, label %.lr.ph

4:                                                ; preds = %.lr.ph
  %5 = add nuw i64 %.01012, 1
  %exitcond.not = icmp eq i64 %5, %2
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %3, %4
  %.01012 = phi i64 [ %5, %4 ], [ 0, %3 ]
  %6 = getelementptr inbounds i8, ptr %1, i64 %.01012
  %7 = tail call i32 @SzReadByte(ptr noundef %0, ptr noundef %6)
  %.not = icmp eq i32 %7, 0
  br i1 %.not, label %4, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %4, %3
  %.2 = phi i32 [ 0, %3 ], [ 0, %4 ], [ %7, %.lr.ph ]
  ret i32 %.2
}

attributes #0 = { 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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