; LLVM IR from jgaeddert/liquid-dsp :: src/fec/src (crc)

; 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"

@crc_scheme_str = external dso_local global [7 x [2 x ptr]], align 16
@.str.17 = external hidden unnamed_addr constant [72 x i8], align 1
@.str.18 = external hidden unnamed_addr constant [60 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 @liquid_getopt_str2crc(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %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) #4
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %6

6:                                                ; preds = %21, %1
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = icmp ult i32 %7, 7
  br i1 %8, label %9, label %24

9:                                                ; preds = %6
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = zext i32 %11 to i64
  %13 = getelementptr inbounds [7 x [2 x ptr]], ptr @crc_scheme_str, i64 0, i64 %12
  %14 = getelementptr inbounds [2 x ptr], ptr %13, i64 0, i64 0
  %15 = load ptr, ptr %14, align 16, !tbaa !5
  %16 = call i32 @strcmp(ptr noundef %10, ptr noundef %15) #5
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %20

18:                                               ; preds = %9
  %19 = load i32, ptr %4, align 4, !tbaa !9
  store i32 %19, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %27

20:                                               ; preds = %9
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = add i32 %22, 1
  store i32 %23, ptr %4, align 4, !tbaa !9
  br label %6, !llvm.loop !11

24:                                               ; preds = %6
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = call i32 (i32, ptr, i32, ptr, ...) @liquid_error_fl(i32 noundef 3, ptr noundef @.str.17, i32 noundef 92, ptr noundef @.str.18, ptr noundef %25)
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %27

27:                                               ; preds = %24, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  %28 = load i32, ptr %2, align 4
  ret i32 %28
}

; Function Attrs: nounwind willreturn memory(read)
declare i32 @strcmp(ptr noundef, ptr noundef) #2

declare i32 @liquid_error_fl(i32 noundef, ptr noundef, i32 noundef, ptr 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 = { 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 #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 = { 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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@crc_scheme_str = external dso_local local_unnamed_addr global [7 x [2 x ptr]], align 16
@.str.17 = external hidden unnamed_addr constant [72 x i8], align 1
@.str.18 = external hidden unnamed_addr constant [60 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @liquid_getopt_str2crc(ptr noundef %0) local_unnamed_addr #0 {
  %2 = load ptr, ptr @crc_scheme_str, align 16, !tbaa !5
  %3 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %2) #3
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %.loopexit, label %5

5:                                                ; preds = %1
  %6 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 16), align 16, !tbaa !5
  %7 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %6) #3
  %8 = icmp eq i32 %7, 0
  br i1 %8, label %.loopexit, label %9

9:                                                ; preds = %5
  %10 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 32), align 16, !tbaa !5
  %11 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %10) #3
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %.loopexit, label %13

13:                                               ; preds = %9
  %14 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 48), align 16, !tbaa !5
  %15 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %14) #3
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %.loopexit, label %17

17:                                               ; preds = %13
  %18 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 64), align 16, !tbaa !5
  %19 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %18) #3
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %.loopexit, label %21

21:                                               ; preds = %17
  %22 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 80), align 16, !tbaa !5
  %23 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %22) #3
  %24 = icmp eq i32 %23, 0
  br i1 %24, label %.loopexit, label %25

25:                                               ; preds = %21
  %26 = load ptr, ptr getelementptr inbounds (i8, ptr @crc_scheme_str, i64 96), align 16, !tbaa !5
  %27 = tail call i32 @strcmp(ptr noundef nonnull dereferenceable(1) %0, ptr noundef nonnull dereferenceable(1) %26) #3
  %28 = icmp eq i32 %27, 0
  br i1 %28, label %.loopexit, label %29

29:                                               ; preds = %25
  %30 = tail call i32 (i32, ptr, i32, ptr, ...) @liquid_error_fl(i32 noundef 3, ptr noundef nonnull @.str.17, i32 noundef 92, ptr noundef nonnull @.str.18, ptr noundef %0) #4
  br label %.loopexit

.loopexit:                                        ; preds = %1, %5, %9, %13, %17, %21, %25, %29
  %.06 = phi i32 [ 0, %29 ], [ 0, %1 ], [ 1, %5 ], [ 2, %9 ], [ 3, %13 ], [ 4, %17 ], [ 5, %21 ], [ 6, %25 ]
  ret i32 %.06
}

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

declare i32 @liquid_error_fl(i32 noundef, ptr noundef, i32 noundef, ptr noundef, ...) local_unnamed_addr #2

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 = { 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 = { "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 = { nounwind willreturn memory(read) }
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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass