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

; 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.DIGEST_TABLE = type { i32, ptr, ptr }
%struct.DIGEST = type { i32, i64, i64, i64, ptr, ptr, ptr }

@digest_table = external dso_local global [1 x %struct.DIGEST_TABLE], align 16

; Function Attrs: nounwind uwtable
define dso_local ptr @digest_name(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %27, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = sext i32 %7 to i64
  %9 = icmp ult i64 %8, 1
  br i1 %9, label %10, label %30

10:                                               ; preds = %6
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.DIGEST, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = load i32, ptr %4, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1 x %struct.DIGEST_TABLE], ptr @digest_table, i64 0, i64 %15
  %17 = getelementptr inbounds %struct.DIGEST_TABLE, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !14
  %19 = icmp eq i32 %13, %18
  br i1 %19, label %20, label %26

20:                                               ; preds = %10
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [1 x %struct.DIGEST_TABLE], ptr @digest_table, i64 0, i64 %22
  %24 = getelementptr inbounds %struct.DIGEST_TABLE, ptr %23, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !16
  store ptr %25, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

26:                                               ; preds = %10
  br label %27

27:                                               ; preds = %26
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !17

30:                                               ; preds = %6
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %31

31:                                               ; preds = %30, %20
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %32 = load ptr, ptr %2, align 8
  ret ptr %32
}

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

; 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 }

!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 = !{!12, !10, i64 0}
!12 = !{!"DIGEST", !10, i64 0, !13, i64 8, !13, i64 16, !13, i64 24, !6, i64 32, !6, i64 40, !6, i64 48}
!13 = !{!"long", !7, i64 0}
!14 = !{!15, !10, i64 0}
!15 = !{!"", !10, i64 0, !6, i64 8, !6, i64 16}
!16 = !{!15, !6, i64 8}
!17 = distinct !{!17, !18}
!18 = !{!"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"

%struct.DIGEST_TABLE = type { i32, ptr, ptr }

@digest_table = external dso_local local_unnamed_addr global [1 x %struct.DIGEST_TABLE], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local ptr @digest_name(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
.critedge:
  %1 = load i32, ptr %0, align 8, !tbaa !5
  %2 = load i32, ptr @digest_table, align 16, !tbaa !12
  %3 = icmp eq i32 %1, %2
  %4 = load ptr, ptr getelementptr inbounds (i8, ptr @digest_table, i64 8), align 8
  %.05 = select i1 %3, ptr %4, ptr null
  ret ptr %.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, !7, i64 0}
!6 = !{!"DIGEST", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 24, !11, i64 32, !11, i64 40, !11, i64 48}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!13, !7, i64 0}
!13 = !{!"", !7, i64 0, !11, i64 8, !11, i64 16}


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