; LLVM IR from IOsonata/IOsonata :: ARM/Nordic/nRF52/nRF52840/exemples/BoschAppBoard/src (bmi3)

; 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"

; 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 nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
declare dso_local signext i8 @bmi3_get_regs(i8 noundef zeroext, ptr noundef, i16 noundef zeroext, ptr noundef) #2

; 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 signext i8 @bmi3_get_fifo_length(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i8, align 1
  %6 = alloca i16, align 2
  %7 = alloca [2 x i8], align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 2, ptr %7) #3
  call void @llvm.memset.p0.i64(ptr align 1 %7, i8 0, i64 2, i1 false)
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = icmp ne ptr %8, null
  br i1 %9, label %10, label %49

10:                                               ; preds = %2
  %11 = getelementptr inbounds [2 x i8], ptr %7, i64 0, i64 0
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = call signext i8 @bmi3_get_regs(i8 noundef zeroext 21, ptr noundef %11, i16 noundef zeroext 2, ptr noundef %12)
  store i8 %13, ptr %5, align 1, !tbaa !9
  %14 = load i8, ptr %5, align 1, !tbaa !9
  %15 = sext i8 %14 to i32
  %16 = icmp eq i32 %15, 0
  br i1 %16, label %17, label %48

17:                                               ; preds = %10
  %18 = getelementptr inbounds [2 x i8], ptr %7, i64 0, i64 0
  %19 = load i8, ptr %18, align 1, !tbaa !9
  %20 = zext i8 %19 to i32
  %21 = and i32 %20, 2047
  %22 = trunc i32 %21 to i8
  %23 = getelementptr inbounds [2 x i8], ptr %7, i64 0, i64 0
  store i8 %22, ptr %23, align 1, !tbaa !9
  %24 = getelementptr inbounds [2 x i8], ptr %7, i64 0, i64 1
  %25 = load i8, ptr %24, align 1, !tbaa !9
  %26 = zext i8 %25 to i16
  %27 = zext i16 %26 to i32
  %28 = shl i32 %27, 8
  %29 = trunc i32 %28 to i16
  store i16 %29, ptr %6, align 2, !tbaa !10
  %30 = load i16, ptr %6, align 2, !tbaa !10
  %31 = zext i16 %30 to i32
  %32 = and i32 %31, 2047
  %33 = trunc i32 %32 to i16
  store i16 %33, ptr %6, align 2, !tbaa !10
  %34 = load i16, ptr %6, align 2, !tbaa !10
  %35 = zext i16 %34 to i32
  %36 = getelementptr inbounds [2 x i8], ptr %7, i64 0, i64 0
  %37 = load i8, ptr %36, align 1, !tbaa !9
  %38 = zext i8 %37 to i32
  %39 = or i32 %35, %38
  %40 = trunc i32 %39 to i16
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  store i16 %40, ptr %41, align 2, !tbaa !10
  %42 = load ptr, ptr %3, align 8, !tbaa !5
  %43 = load i16, ptr %42, align 2, !tbaa !10
  %44 = zext i16 %43 to i32
  %45 = icmp eq i32 %44, 0
  br i1 %45, label %46, label %47

46:                                               ; preds = %17
  store i8 1, ptr %5, align 1, !tbaa !9
  br label %47

47:                                               ; preds = %46, %17
  br label %48

48:                                               ; preds = %47, %10
  br label %50

49:                                               ; preds = %2
  store i8 -1, ptr %5, align 1, !tbaa !9
  br label %50

50:                                               ; preds = %49, %48
  %51 = load i8, ptr %5, align 1, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 2, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 2, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #3
  ret i8 %51
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: write) }
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 = { 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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !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"

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

; Function Attrs: nounwind uwtable
declare dso_local signext i8 @bmi3_get_regs(i8 noundef zeroext, ptr noundef, i16 noundef zeroext, ptr noundef) 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
define dso_local signext i8 @bmi3_get_fifo_length(ptr noundef writeonly %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = alloca [2 x i8], align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %3) #2
  store i16 0, ptr %3, align 2
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %17, label %4

4:                                                ; preds = %2
  %5 = call signext i8 @bmi3_get_regs(i8 noundef zeroext 21, ptr noundef nonnull %3, i16 noundef zeroext 2, ptr noundef %1)
  %6 = icmp eq i8 %5, 0
  br i1 %6, label %7, label %17

7:                                                ; preds = %4
  %8 = load i8, ptr %3, align 2, !tbaa !5
  %9 = getelementptr inbounds i8, ptr %3, i64 1
  %10 = load i8, ptr %9, align 1, !tbaa !5
  %11 = zext i8 %10 to i16
  %12 = shl nuw i16 %11, 8
  %13 = and i16 %12, 1792
  %14 = zext i8 %8 to i16
  %15 = or disjoint i16 %13, %14
  store i16 %15, ptr %0, align 2, !tbaa !8
  %16 = icmp eq i16 %15, 0
  %spec.select = zext i1 %16 to i8
  br label %17

17:                                               ; preds = %7, %2, %4
  %.0 = phi i8 [ %5, %4 ], [ %spec.select, %7 ], [ -1, %2 ]
  call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %3) #2
  ret i8 %.0
}

attributes #0 = { mustprogress 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 }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"short", !6, i64 0}


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