; 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"

@k7zSignature = external global [6 x i8], align 1

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

6:                                                ; preds = %22, %1
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = icmp ult i64 %7, 6
  br i1 %8, label %9, label %25

9:                                                ; preds = %6
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = load i64, ptr %4, align 8, !tbaa !9
  %12 = getelementptr inbounds i8, ptr %10, i64 %11
  %13 = load i8, ptr %12, align 1, !tbaa !11
  %14 = zext i8 %13 to i32
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = getelementptr inbounds [6 x i8], ptr @k7zSignature, i64 0, i64 %15
  %17 = load i8, ptr %16, align 1, !tbaa !11
  %18 = zext i8 %17 to i32
  %19 = icmp ne i32 %14, %18
  br i1 %19, label %20, label %21

20:                                               ; preds = %9
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %26

21:                                               ; preds = %9
  br label %22

22:                                               ; preds = %21
  %23 = load i64, ptr %4, align 8, !tbaa !9
  %24 = add i64 %23, 1
  store i64 %24, ptr %4, align 8, !tbaa !9
  br label %6, !llvm.loop !12

25:                                               ; preds = %6
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %26

26:                                               ; preds = %25, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %27 = load i32, ptr %2, align 4
  ret i32 %27
}

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 = !{!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"

@k7zSignature = external local_unnamed_addr global [6 x i8], align 1

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 2) i32 @TestSignatureCandidate(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i8, ptr %0, align 1, !tbaa !5
  %3 = load i8, ptr @k7zSignature, align 1, !tbaa !5
  %.not = icmp eq i8 %2, %3
  br i1 %.not, label %4, label %24

4:                                                ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 1
  %6 = load i8, ptr %5, align 1, !tbaa !5
  %7 = load i8, ptr getelementptr inbounds (i8, ptr @k7zSignature, i64 1), align 1, !tbaa !5
  %.not.1 = icmp eq i8 %6, %7
  br i1 %.not.1, label %8, label %24

8:                                                ; preds = %4
  %9 = getelementptr inbounds i8, ptr %0, i64 2
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = load i8, ptr getelementptr inbounds (i8, ptr @k7zSignature, i64 2), align 1, !tbaa !5
  %.not.2 = icmp eq i8 %10, %11
  br i1 %.not.2, label %12, label %24

12:                                               ; preds = %8
  %13 = getelementptr inbounds i8, ptr %0, i64 3
  %14 = load i8, ptr %13, align 1, !tbaa !5
  %15 = load i8, ptr getelementptr inbounds (i8, ptr @k7zSignature, i64 3), align 1, !tbaa !5
  %.not.3 = icmp eq i8 %14, %15
  br i1 %.not.3, label %16, label %24

16:                                               ; preds = %12
  %17 = getelementptr inbounds i8, ptr %0, i64 4
  %18 = load i8, ptr %17, align 1, !tbaa !5
  %19 = load i8, ptr getelementptr inbounds (i8, ptr @k7zSignature, i64 4), align 1, !tbaa !5
  %.not.4 = icmp eq i8 %18, %19
  br i1 %.not.4, label %20, label %24

20:                                               ; preds = %16
  %21 = getelementptr inbounds i8, ptr %0, i64 5
  %22 = load i8, ptr %21, align 1, !tbaa !5
  %23 = load i8, ptr getelementptr inbounds (i8, ptr @k7zSignature, i64 5), align 1, !tbaa !5
  %.not.5 = icmp eq i8 %22, %23
  %spec.select = zext i1 %.not.5 to i32
  br label %24

24:                                               ; preds = %20, %16, %12, %8, %4, %1
  %.05 = phi i32 [ 0, %1 ], [ 0, %4 ], [ 0, %8 ], [ 0, %12 ], [ 0, %16 ], [ %spec.select, %20 ]
  ret i32 %.05
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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/C++ TBAA"}


; Effective O3 passes: GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass