; LLVM IR from guanzhi/GmSSL :: src (sm2_sign)

; 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"

%struct.SM2_SIGNATURE = type { [32 x i8], [32 x i8] }

@stderr = external global ptr, align 8
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [62 x i8], align 1
@__FUNCTION__.sm2_verify = external hidden unnamed_addr constant [11 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: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #1

; 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 @sm2_do_verify(ptr noundef, ptr noundef, ptr noundef) #2

; Function Attrs: nounwind uwtable
declare dso_local i32 @sm2_signature_from_der(ptr noundef, ptr noundef, ptr noundef) #2

declare i32 @asn1_length_is_zero(i64 noundef) #3

; Function Attrs: nounwind uwtable
define dso_local i32 @sm2_verify(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i64, align 8
  %10 = alloca %struct.SM2_SIGNATURE, align 1
  %11 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i64 %3, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 64, ptr %10) #4
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %23

14:                                               ; preds = %4
  %15 = load ptr, ptr %7, align 8, !tbaa !5
  %16 = icmp ne ptr %15, null
  br i1 %16, label %17, label %23

17:                                               ; preds = %14
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %20, label %23

20:                                               ; preds = %17
  %21 = load i64, ptr %9, align 8, !tbaa !9
  %22 = icmp ne i64 %21, 0
  br i1 %22, label %29, label %23

23:                                               ; preds = %20, %17, %14, %4
  br label %24

24:                                               ; preds = %23
  %25 = load ptr, ptr @stderr, align 8, !tbaa !5
  %26 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %25, ptr noundef @.str, ptr noundef @.str.1, i32 noundef 453, ptr noundef @__FUNCTION__.sm2_verify) #4
  br label %27

27:                                               ; preds = %24
  br label %28

28:                                               ; preds = %27
  store i32 -1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %54

29:                                               ; preds = %20
  %30 = call i32 @sm2_signature_from_der(ptr noundef %10, ptr noundef %8, ptr noundef %9)
  %31 = icmp ne i32 %30, 1
  br i1 %31, label %36, label %32

32:                                               ; preds = %29
  %33 = load i64, ptr %9, align 8, !tbaa !9
  %34 = call i32 @asn1_length_is_zero(i64 noundef %33)
  %35 = icmp ne i32 %34, 1
  br i1 %35, label %36, label %42

36:                                               ; preds = %32, %29
  br label %37

37:                                               ; preds = %36
  %38 = load ptr, ptr @stderr, align 8, !tbaa !5
  %39 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %38, ptr noundef @.str, ptr noundef @.str.1, i32 noundef 459, ptr noundef @__FUNCTION__.sm2_verify) #4
  br label %40

40:                                               ; preds = %37
  br label %41

41:                                               ; preds = %40
  store i32 -1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %54

42:                                               ; preds = %32
  %43 = load ptr, ptr %6, align 8, !tbaa !5
  %44 = load ptr, ptr %7, align 8, !tbaa !5
  %45 = call i32 @sm2_do_verify(ptr noundef %43, ptr noundef %44, ptr noundef %10)
  %46 = icmp ne i32 %45, 1
  br i1 %46, label %47, label %53

47:                                               ; preds = %42
  br label %48

48:                                               ; preds = %47
  %49 = load ptr, ptr @stderr, align 8, !tbaa !5
  %50 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %49, ptr noundef @.str, ptr noundef @.str.1, i32 noundef 463, ptr noundef @__FUNCTION__.sm2_verify) #4
  br label %51

51:                                               ; preds = %48
  br label %52

52:                                               ; preds = %51
  store i32 -1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %54

53:                                               ; preds = %42
  store i32 1, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %54

54:                                               ; preds = %53, %52, %41, %28
  call void @llvm.lifetime.end.p0(i64 64, ptr %10) #4
  %55 = load i32, ptr %5, align 4
  ret i32 %55
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 #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 = !{!"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"

%struct.SM2_SIGNATURE = type { [32 x i8], [32 x i8] }

@stderr = external local_unnamed_addr global ptr, align 8
@.str = external hidden unnamed_addr constant [13 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [62 x i8], align 1
@__FUNCTION__.sm2_verify = external hidden unnamed_addr constant [11 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; 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 @sm2_do_verify(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare dso_local i32 @sm2_signature_from_der(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #2

declare i32 @asn1_length_is_zero(i64 noundef) local_unnamed_addr #3

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 2) i32 @sm2_verify(ptr noundef %0, ptr noundef %1, ptr noundef %2, i64 noundef %3) local_unnamed_addr #2 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca %struct.SM2_SIGNATURE, align 1
  store ptr %2, ptr %5, align 8, !tbaa !5
  store i64 %3, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 64, ptr nonnull %7) #4
  %8 = icmp ne ptr %0, null
  %9 = icmp ne ptr %1, null
  %or.cond = and i1 %8, %9
  %10 = icmp ne ptr %2, null
  %or.cond3 = and i1 %or.cond, %10
  %11 = icmp ne i64 %3, 0
  %or.cond5 = and i1 %or.cond3, %11
  br i1 %or.cond5, label %15, label %12

12:                                               ; preds = %4
  %13 = load ptr, ptr @stderr, align 8, !tbaa !5
  %14 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %13, ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 453, ptr noundef nonnull @__FUNCTION__.sm2_verify) #5
  br label %28

15:                                               ; preds = %4
  %16 = call i32 @sm2_signature_from_der(ptr noundef nonnull %7, ptr noundef nonnull %5, ptr noundef nonnull %6)
  %.not = icmp eq i32 %16, 1
  br i1 %.not, label %17, label %20

17:                                               ; preds = %15
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = call i32 @asn1_length_is_zero(i64 noundef %18) #4
  %.not11 = icmp eq i32 %19, 1
  br i1 %.not11, label %23, label %20

20:                                               ; preds = %15, %17
  %21 = load ptr, ptr @stderr, align 8, !tbaa !5
  %22 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %21, ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 459, ptr noundef nonnull @__FUNCTION__.sm2_verify) #5
  br label %28

23:                                               ; preds = %17
  %24 = call i32 @sm2_do_verify(ptr noundef nonnull %0, ptr noundef nonnull %1, ptr noundef nonnull %7)
  %.not12 = icmp eq i32 %24, 1
  br i1 %.not12, label %28, label %25

25:                                               ; preds = %23
  %26 = load ptr, ptr @stderr, align 8, !tbaa !5
  %27 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %26, ptr noundef nonnull @.str, ptr noundef nonnull @.str.1, i32 noundef 463, ptr noundef nonnull @__FUNCTION__.sm2_verify) #5
  br label %28

28:                                               ; preds = %23, %25, %20, %12
  %.0 = phi i32 [ -1, %20 ], [ -1, %25 ], [ -1, %12 ], [ 1, %23 ]
  call void @llvm.lifetime.end.p0(i64 64, ptr nonnull %7) #4
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #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 }
attributes #5 = { 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}


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