; 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 @SafeReadDirectByte(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @SafeReadDirectUInt32(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  %8 = alloca i32, align 4
  %9 = 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 4, ptr %6) #2
  %10 = load ptr, ptr %5, align 8, !tbaa !5
  store i32 0, ptr %10, align 4, !tbaa !9
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %36, %2
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = icmp slt i32 %12, 4
  br i1 %13, label %14, label %39

14:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = call i32 @SafeReadDirectByte(ptr noundef %15, ptr noundef %7)
  store i32 %16, ptr %8, align 4, !tbaa !9
  %17 = load i32, ptr %8, align 4, !tbaa !9
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %21

19:                                               ; preds = %14
  %20 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %20, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %22

21:                                               ; preds = %14
  store i32 0, ptr %9, align 4
  br label %22

22:                                               ; preds = %21, %19
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %23 = load i32, ptr %9, align 4
  switch i32 %23, label %33 [
    i32 0, label %24
  ]

24:                                               ; preds = %22
  %25 = load i8, ptr %7, align 1, !tbaa !11
  %26 = zext i8 %25 to i32
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = mul nsw i32 8, %27
  %29 = shl i32 %26, %28
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i32, ptr %30, align 4, !tbaa !9
  %32 = or i32 %31, %29
  store i32 %32, ptr %30, align 4, !tbaa !9
  store i32 0, ptr %9, align 4
  br label %33

33:                                               ; preds = %24, %22
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  %34 = load i32, ptr %9, align 4
  switch i32 %34, label %40 [
    i32 0, label %35
  ]

35:                                               ; preds = %33
  br label %36

36:                                               ; preds = %35
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = add nsw i32 %37, 1
  store i32 %38, ptr %6, align 4, !tbaa !9
  br label %11, !llvm.loop !12

39:                                               ; preds = %11
  store i32 0, ptr %3, align 4
  store i32 1, ptr %9, align 4
  br label %40

40:                                               ; preds = %39, %33
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  %41 = load i32, ptr %3, align 4
  ret i32 %41
}

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 = !{!"int", !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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress 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 @SafeReadDirectByte(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @SafeReadDirectUInt32(ptr noundef %0, ptr nocapture noundef %1) local_unnamed_addr #1 {
  %3 = alloca i8, align 1
  store i32 0, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  %4 = call i32 @SafeReadDirectByte(ptr noundef %0, ptr noundef nonnull %3)
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %5, label %.critedge

5:                                                ; preds = %2
  %6 = load i8, ptr %3, align 1, !tbaa !9
  %7 = zext i8 %6 to i32
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = or i32 %8, %7
  store i32 %9, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  %10 = call i32 @SafeReadDirectByte(ptr noundef %0, ptr noundef nonnull %3)
  %.not.1 = icmp eq i32 %10, 0
  br i1 %.not.1, label %11, label %.critedge

11:                                               ; preds = %5
  %12 = load i8, ptr %3, align 1, !tbaa !9
  %13 = zext i8 %12 to i32
  %14 = shl nuw nsw i32 %13, 8
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = or i32 %14, %15
  store i32 %16, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  %17 = call i32 @SafeReadDirectByte(ptr noundef %0, ptr noundef nonnull %3)
  %.not.2 = icmp eq i32 %17, 0
  br i1 %.not.2, label %18, label %.critedge

18:                                               ; preds = %11
  %19 = load i8, ptr %3, align 1, !tbaa !9
  %20 = zext i8 %19 to i32
  %21 = shl nuw nsw i32 %20, 16
  %22 = load i32, ptr %1, align 4, !tbaa !5
  %23 = or i32 %21, %22
  store i32 %23, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  %24 = call i32 @SafeReadDirectByte(ptr noundef %0, ptr noundef nonnull %3)
  %.not.3 = icmp eq i32 %24, 0
  br i1 %.not.3, label %.loopexit.loopexit, label %.critedge

.loopexit.loopexit:                               ; preds = %18
  %25 = load i8, ptr %3, align 1, !tbaa !9
  %26 = zext i8 %25 to i32
  %27 = shl nuw i32 %26, 24
  %28 = load i32, ptr %1, align 4, !tbaa !5
  %29 = or i32 %27, %28
  store i32 %29, ptr %1, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  br label %.loopexit

.critedge:                                        ; preds = %18, %11, %5, %2
  %.lcssa = phi i32 [ %4, %2 ], [ %10, %5 ], [ %17, %11 ], [ %24, %18 ]
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  br label %.loopexit

.loopexit:                                        ; preds = %.loopexit.loopexit, %.critedge
  %.2 = phi i32 [ %.lcssa, %.critedge ], [ 0, %.loopexit.loopexit ]
  ret i32 %.2
}

attributes #0 = { mustprogress 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass