; LLVM IR from beagleboard/librobotcontrol :: examples/src (rc_test_encoders_eqep)

; 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 [43 x i8], align 1
@running = external hidden global i32, align 4
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [7 x i8], align 1
@stdout = external global ptr, align 8
@.str.8 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  %4 = call i32 @rc_encoder_eqep_init()
  %5 = icmp ne i32 %4, 0
  br i1 %5, label %6, label %9

6:                                                ; preds = %0
  %7 = load ptr, ptr @stderr, align 8, !tbaa !5
  %8 = call i32 (ptr, ptr, ...) @fprintf(ptr noundef %7, ptr noundef @.str) #4
  store i32 -1, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %37

9:                                                ; preds = %0
  %10 = call ptr @signal(i32 noundef 2, ptr noundef @__signal_handler) #4
  store i32 1, ptr @running, align 4, !tbaa !9
  %11 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  %12 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  %15 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  br label %16

16:                                               ; preds = %31, %9
  %17 = load i32, ptr @running, align 4, !tbaa !9
  %18 = icmp ne i32 %17, 0
  br i1 %18, label %19, label %34

19:                                               ; preds = %16
  %20 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  store i32 1, ptr %2, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %28, %19
  %22 = load i32, ptr %2, align 4, !tbaa !9
  %23 = icmp sle i32 %22, 3
  br i1 %23, label %24, label %31

24:                                               ; preds = %21
  %25 = load i32, ptr %2, align 4, !tbaa !9
  %26 = call i32 @rc_encoder_eqep_read(i32 noundef %25)
  %27 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, i32 noundef %26)
  br label %28

28:                                               ; preds = %24
  %29 = load i32, ptr %2, align 4, !tbaa !9
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %2, align 4, !tbaa !9
  br label %21, !llvm.loop !11

31:                                               ; preds = %21
  %32 = load ptr, ptr @stdout, align 8, !tbaa !5
  %33 = call i32 @fflush(ptr noundef %32)
  call void @rc_usleep(i32 noundef 50000)
  br label %16, !llvm.loop !13

34:                                               ; preds = %16
  %35 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  %36 = call i32 @rc_encoder_eqep_cleanup()
  store i32 0, ptr %1, align 4
  store i32 1, ptr %3, align 4
  br label %37

37:                                               ; preds = %34, %6
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %38 = load i32, ptr %1, align 4
  ret i32 %38
}

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

declare i32 @rc_encoder_eqep_init() #2

; Function Attrs: nounwind
declare i32 @fprintf(ptr noundef, ptr noundef, ...) #3

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) #3

; Function Attrs: nounwind uwtable
declare hidden void @__signal_handler(i32 noundef) #0

declare i32 @printf(ptr noundef, ...) #2

declare i32 @rc_encoder_eqep_read(i32 noundef) #2

declare i32 @fflush(ptr noundef) #2

declare void @rc_usleep(i32 noundef) #2

declare i32 @rc_encoder_eqep_cleanup() #2

; 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 = { "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 "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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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 [43 x i8], align 1
@running = external hidden local_unnamed_addr global i32, align 4
@.str.1 = external hidden unnamed_addr constant [24 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [13 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [7 x i8], align 1
@stdout = external local_unnamed_addr global ptr, align 8
@.str.8 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 -1, 1) i32 @main() local_unnamed_addr #0 {
  %1 = tail call i32 @rc_encoder_eqep_init() #4
  %.not = icmp eq i32 %1, 0
  br i1 %.not, label %5, label %2

2:                                                ; preds = %0
  %3 = load ptr, ptr @stderr, align 8, !tbaa !5
  %4 = tail call i32 (ptr, ptr, ...) @fprintf(ptr noundef %3, ptr noundef nonnull @.str) #5
  br label %25

5:                                                ; preds = %0
  %6 = tail call ptr @signal(i32 noundef 2, ptr noundef nonnull @__signal_handler) #4
  store i32 1, ptr @running, align 4, !tbaa !9
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %9 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %10 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %12 = load i32, ptr @running, align 4, !tbaa !9
  %.not57 = icmp eq i32 %12, 0
  br i1 %.not57, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5, %.lr.ph
  %13 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  %14 = tail call i32 @rc_encoder_eqep_read(i32 noundef 1) #4
  %15 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %14)
  %16 = tail call i32 @rc_encoder_eqep_read(i32 noundef 2) #4
  %17 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %16)
  %18 = tail call i32 @rc_encoder_eqep_read(i32 noundef 3) #4
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, i32 noundef %18)
  %20 = load ptr, ptr @stdout, align 8, !tbaa !5
  %21 = tail call i32 @fflush(ptr noundef %20)
  tail call void @rc_usleep(i32 noundef 50000) #4
  %22 = load i32, ptr @running, align 4, !tbaa !9
  %.not5 = icmp eq i32 %22, 0
  br i1 %.not5, label %._crit_edge, label %.lr.ph, !llvm.loop !11

._crit_edge:                                      ; preds = %.lr.ph, %5
  %23 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  %24 = tail call i32 @rc_encoder_eqep_cleanup() #4
  br label %25

25:                                               ; preds = %._crit_edge, %2
  %.04 = phi i32 [ -1, %2 ], [ 0, %._crit_edge ]
  ret i32 %.04
}

declare i32 @rc_encoder_eqep_init() local_unnamed_addr #1

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

; Function Attrs: nounwind
declare ptr @signal(i32 noundef, ptr noundef) local_unnamed_addr #3

; Function Attrs: nounwind uwtable
declare hidden void @__signal_handler(i32 noundef) #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

declare i32 @rc_encoder_eqep_read(i32 noundef) local_unnamed_addr #1

; Function Attrs: nofree nounwind
declare noundef i32 @fflush(ptr nocapture noundef) local_unnamed_addr #2

declare void @rc_usleep(i32 noundef) local_unnamed_addr #1

declare i32 @rc_encoder_eqep_cleanup() 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 = { "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 = { 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 #3 = { 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 #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 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


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