; LLVM IR from PacktPublishing/Demystifying-Cryptography-with-OpenSSL-3 :: Chapter08 (x509-verify)

; 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"

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [66 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [48 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [45 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca ptr, align 8
  %12 = alloca i32, align 4
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store ptr null, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #4
  store ptr null, ptr %8, align 8, !tbaa !9
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp ne i32 %13, 4
  br i1 %14, label %15, label %21

15:                                               ; preds = %2
  %16 = load ptr, ptr @stderr, align 8, !tbaa !9
  %17 = load ptr, ptr %5, align 8, !tbaa !9
  %18 = getelementptr inbounds ptr, ptr %17, i64 0
  %19 = load ptr, ptr %18, align 8, !tbaa !9
  %20 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef @.str, ptr noundef %19) #4
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %63

21:                                               ; preds = %2
  %22 = load ptr, ptr %5, align 8, !tbaa !9
  %23 = getelementptr inbounds ptr, ptr %22, i64 1
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  store ptr %24, ptr %9, align 8, !tbaa !9
  %25 = load ptr, ptr %5, align 8, !tbaa !9
  %26 = getelementptr inbounds ptr, ptr %25, i64 2
  %27 = load ptr, ptr %26, align 8, !tbaa !9
  store ptr %27, ptr %10, align 8, !tbaa !9
  %28 = load ptr, ptr %5, align 8, !tbaa !9
  %29 = getelementptr inbounds ptr, ptr %28, i64 3
  %30 = load ptr, ptr %29, align 8, !tbaa !9
  store ptr %30, ptr %11, align 8, !tbaa !9
  %31 = load ptr, ptr %10, align 8, !tbaa !9
  %32 = call noalias ptr @fopen(ptr noundef %31, ptr noundef @.str.1)
  store ptr %32, ptr %7, align 8, !tbaa !9
  %33 = load ptr, ptr %7, align 8, !tbaa !9
  %34 = icmp ne ptr %33, null
  br i1 %34, label %39, label %35

35:                                               ; preds = %21
  %36 = load ptr, ptr @stderr, align 8, !tbaa !9
  %37 = load ptr, ptr %10, align 8, !tbaa !9
  %38 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %36, ptr noundef @.str.2, ptr noundef %37) #4
  br label %62

39:                                               ; preds = %21
  %40 = load ptr, ptr %11, align 8, !tbaa !9
  %41 = call noalias ptr @fopen(ptr noundef %40, ptr noundef @.str.1)
  store ptr %41, ptr %8, align 8, !tbaa !9
  %42 = load ptr, ptr %8, align 8, !tbaa !9
  %43 = icmp ne ptr %42, null
  br i1 %43, label %48, label %44

44:                                               ; preds = %39
  %45 = load ptr, ptr @stderr, align 8, !tbaa !9
  %46 = load ptr, ptr %11, align 8, !tbaa !9
  %47 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %45, ptr noundef @.str.3, ptr noundef %46) #4
  br label %62

48:                                               ; preds = %39
  %49 = load ptr, ptr %9, align 8, !tbaa !9
  %50 = load ptr, ptr %7, align 8, !tbaa !9
  %51 = load ptr, ptr %8, align 8, !tbaa !9
  %52 = load ptr, ptr @stderr, align 8, !tbaa !9
  %53 = call i32 @verify(ptr noundef %49, ptr noundef %50, ptr noundef %51, ptr noundef %52)
  store i32 %53, ptr %12, align 4, !tbaa !5
  %54 = load i32, ptr %12, align 4, !tbaa !5
  %55 = icmp ne i32 %54, 0
  br i1 %55, label %56, label %59

56:                                               ; preds = %48
  %57 = load ptr, ptr @stderr, align 8, !tbaa !9
  %58 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %57, ptr noundef @.str.4) #4
  br label %62

59:                                               ; preds = %48
  %60 = load ptr, ptr @stderr, align 8, !tbaa !9
  %61 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %60, ptr noundef @.str.5) #4
  br label %63

62:                                               ; preds = %56, %44, %35
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %63

63:                                               ; preds = %62, %59, %15
  %64 = load ptr, ptr %8, align 8, !tbaa !9
  %65 = icmp ne ptr %64, null
  br i1 %65, label %66, label %69

66:                                               ; preds = %63
  %67 = load ptr, ptr %8, align 8, !tbaa !9
  %68 = call i32 @fclose(ptr noundef %67)
  br label %69

69:                                               ; preds = %66, %63
  %70 = load ptr, ptr %7, align 8, !tbaa !9
  %71 = icmp ne ptr %70, null
  br i1 %71, label %72, label %75

72:                                               ; preds = %69
  %73 = load ptr, ptr %7, align 8, !tbaa !9
  %74 = call i32 @fclose(ptr noundef %73)
  br label %75

75:                                               ; preds = %72, %69
  %76 = load i32, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  ret i32 %76
}

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

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #2

declare noalias ptr @fopen(ptr noundef, ptr noundef) #3

; Function Attrs: nounwind uwtable
declare dso_local i32 @verify(ptr noundef, ptr noundef, ptr noundef, ptr noundef) #0

declare i32 @fclose(ptr noundef) #3

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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nounwind "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 #3 = { "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 }

!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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !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"

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [66 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [48 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [45 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [21 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [24 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 4
  br i1 %.not, label %7, label %3

3:                                                ; preds = %2
  %4 = load ptr, ptr @stderr, align 8, !tbaa !5
  %5 = load ptr, ptr %1, align 8, !tbaa !5
  %6 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %4, ptr noundef nonnull @.str, ptr noundef %5) #2
  br label %.thread43

7:                                                ; preds = %2
  %8 = getelementptr inbounds i8, ptr %1, i64 8
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  %10 = getelementptr inbounds i8, ptr %1, i64 16
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  %12 = getelementptr inbounds i8, ptr %1, i64 24
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  %14 = tail call noalias ptr @fopen(ptr noundef %11, ptr noundef nonnull @.str.1)
  %.not24 = icmp eq ptr %14, null
  br i1 %.not24, label %15, label %18

15:                                               ; preds = %7
  %16 = load ptr, ptr @stderr, align 8, !tbaa !5
  %17 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %16, ptr noundef nonnull @.str.2, ptr noundef %11) #2
  br label %.thread43

18:                                               ; preds = %7
  %19 = tail call noalias ptr @fopen(ptr noundef %13, ptr noundef nonnull @.str.1)
  %.not25 = icmp eq ptr %19, null
  %20 = load ptr, ptr @stderr, align 8, !tbaa !5
  br i1 %.not25, label %25, label %.thread35

.thread35:                                        ; preds = %18
  %21 = tail call i32 @verify(ptr noundef %9, ptr noundef nonnull %14, ptr noundef nonnull %19, ptr noundef %20)
  %.not26 = icmp ne i32 %21, 0
  %22 = load ptr, ptr @stderr, align 8, !tbaa !5
  %.str.5..str.4 = select i1 %.not26, ptr @.str.4, ptr @.str.5
  %. = zext i1 %.not26 to i32
  %23 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %22, ptr noundef nonnull %.str.5..str.4) #2
  %24 = tail call i32 @fclose(ptr noundef nonnull %19)
  br label %27

25:                                               ; preds = %18
  %26 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %20, ptr noundef nonnull @.str.3, ptr noundef %13) #2
  br label %27

27:                                               ; preds = %25, %.thread35
  %.03439 = phi i32 [ %., %.thread35 ], [ 1, %25 ]
  %28 = tail call i32 @fclose(ptr noundef nonnull %14)
  br label %.thread43

.thread43:                                        ; preds = %3, %15, %27
  %.03440 = phi i32 [ %.03439, %27 ], [ 1, %15 ], [ 1, %3 ]
  ret i32 %.03440
}

; Function Attrs: nofree nounwind
declare noundef i32 @fprintf(ptr nocapture noundef, ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @verify(ptr noundef, ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @fclose(ptr nocapture noundef) local_unnamed_addr #1

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" }
attributes #1 = { nofree nounwind "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 = { cold 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"}


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