; LLVM IR from Try/Tempest :: Engine/thirdparty/libpng (png)

; 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"

@__const.png_sig_cmp.png_signature = external hidden unnamed_addr constant [8 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 @png_sig_cmp(ptr noundef %0, i64 noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca [8 x i8], align 1
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %8, ptr align 1 @__const.png_sig_cmp.png_signature, i64 8, i1 false)
  %10 = load i64, ptr %7, align 8, !tbaa !9
  %11 = icmp ugt i64 %10, 8
  br i1 %11, label %12, label %13

12:                                               ; preds = %3
  store i64 8, ptr %7, align 8, !tbaa !9
  br label %18

13:                                               ; preds = %3
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = icmp ult i64 %14, 1
  br i1 %15, label %16, label %17

16:                                               ; preds = %13
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %38

17:                                               ; preds = %13
  br label %18

18:                                               ; preds = %17, %12
  %19 = load i64, ptr %6, align 8, !tbaa !9
  %20 = icmp ugt i64 %19, 7
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %38

22:                                               ; preds = %18
  %23 = load i64, ptr %6, align 8, !tbaa !9
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = add i64 %23, %24
  %26 = icmp ugt i64 %25, 8
  br i1 %26, label %27, label %30

27:                                               ; preds = %22
  %28 = load i64, ptr %6, align 8, !tbaa !9
  %29 = sub i64 8, %28
  store i64 %29, ptr %7, align 8, !tbaa !9
  br label %30

30:                                               ; preds = %27, %22
  %31 = load ptr, ptr %5, align 8, !tbaa !5
  %32 = load i64, ptr %6, align 8, !tbaa !9
  %33 = getelementptr inbounds i8, ptr %31, i64 %32
  %34 = load i64, ptr %6, align 8, !tbaa !9
  %35 = getelementptr inbounds [8 x i8], ptr %8, i64 0, i64 %34
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = call i32 @memcmp(ptr noundef %33, ptr noundef %35, i64 noundef %36) #5
  store i32 %37, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %38

38:                                               ; preds = %30, %21, %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  %39 = load i32, ptr %4, align 4
  ret i32 %39
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nounwind willreturn memory(read)
declare i32 @memcmp(ptr noundef, ptr noundef, i64 noundef) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind willreturn memory(read) "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 #4 = { nounwind }
attributes #5 = { nounwind willreturn memory(read) }

!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}


; 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"

@__const.png_sig_cmp.png_signature = external hidden unnamed_addr constant [8 x i8], align 1

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read) uwtable
define dso_local i32 @png_sig_cmp(ptr nocapture noundef readonly %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp ugt i64 %2, 8
  br i1 %4, label %7, label %5

5:                                                ; preds = %3
  %6 = icmp eq i64 %2, 0
  br i1 %6, label %16, label %7

7:                                                ; preds = %3, %5
  %.0 = phi i64 [ %2, %5 ], [ 8, %3 ]
  %8 = icmp ugt i64 %1, 7
  br i1 %8, label %16, label %9

9:                                                ; preds = %7
  %10 = add nuw nsw i64 %.0, %1
  %11 = icmp ugt i64 %10, 8
  %12 = sub nuw nsw i64 8, %1
  %spec.select = select i1 %11, i64 %12, i64 %.0
  %13 = getelementptr inbounds i8, ptr %0, i64 %1
  %14 = getelementptr inbounds [8 x i8], ptr @__const.png_sig_cmp.png_signature, i64 0, i64 %1
  %15 = tail call i32 @memcmp(ptr noundef %13, ptr noundef nonnull %14, i64 noundef %spec.select) #2
  br label %16

16:                                               ; preds = %7, %5, %9
  %.010 = phi i32 [ %15, %9 ], [ -1, %5 ], [ -1, %7 ]
  ret i32 %.010
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @memcmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) 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 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 willreturn memory(read) }

!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)"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass