; LLVM IR from introlab/odas :: src/signal (acorr)

; 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.acorrs_obj = type { i32, i32, ptr }

@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 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 void @acorrs_printf(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %5

5:                                                ; preds = %53, %1
  %6 = load i32, ptr %3, align 4, !tbaa !9
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.acorrs_obj, ptr %7, i32 0, i32 0
  %9 = load i32, ptr %8, align 8, !tbaa !11
  %10 = icmp ult i32 %6, %9
  br i1 %10, label %11, label %56

11:                                               ; preds = %5
  %12 = load i32, ptr %3, align 4, !tbaa !9
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %12)
  store i32 0, ptr %4, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %48, %11
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.acorrs_obj, ptr %16, i32 0, i32 1
  %18 = load i32, ptr %17, align 4, !tbaa !13
  %19 = icmp ult i32 %15, %18
  br i1 %19, label %20, label %51

20:                                               ; preds = %14
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.acorrs_obj, ptr %21, i32 0, i32 2
  %23 = load ptr, ptr %22, align 8, !tbaa !14
  %24 = load i32, ptr %3, align 4, !tbaa !9
  %25 = zext i32 %24 to i64
  %26 = getelementptr inbounds ptr, ptr %23, i64 %25
  %27 = load ptr, ptr %26, align 8, !tbaa !5
  %28 = load i32, ptr %4, align 4, !tbaa !9
  %29 = zext i32 %28 to i64
  %30 = getelementptr inbounds float, ptr %27, i64 %29
  %31 = load float, ptr %30, align 4, !tbaa !15
  %32 = fpext float %31 to double
  %33 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, double noundef %32)
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = add i32 %34, 1
  %36 = urem i32 %35, 16
  %37 = icmp eq i32 %36, 0
  br i1 %37, label %38, label %47

38:                                               ; preds = %20
  %39 = load i32, ptr %4, align 4, !tbaa !9
  %40 = add i32 %39, 1
  %41 = load ptr, ptr %2, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.acorrs_obj, ptr %41, i32 0, i32 1
  %43 = load i32, ptr %42, align 4, !tbaa !13
  %44 = icmp ne i32 %40, %43
  br i1 %44, label %45, label %47

45:                                               ; preds = %38
  %46 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %47

47:                                               ; preds = %45, %38, %20
  br label %48

48:                                               ; preds = %47
  %49 = load i32, ptr %4, align 4, !tbaa !9
  %50 = add i32 %49, 1
  store i32 %50, ptr %4, align 4, !tbaa !9
  br label %14, !llvm.loop !17

51:                                               ; preds = %14
  %52 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %53

53:                                               ; preds = %51
  %54 = load i32, ptr %3, align 4, !tbaa !9
  %55 = add i32 %54, 1
  store i32 %55, ptr %3, align 4, !tbaa !9
  br label %5, !llvm.loop !19

56:                                               ; preds = %5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

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

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 = { "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 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"acorrs_obj", !10, i64 0, !10, i64 4, !6, i64 8}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !6, i64 8}
!15 = !{!16, !16, i64 0}
!16 = !{!"float", !7, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}
!19 = distinct !{!19, !18}


; 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"

@.str = external hidden unnamed_addr constant [9 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [8 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [10 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @acorrs_printf(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i32, ptr %0, align 8, !tbaa !5
  %.not18 = icmp eq i32 %2, 0
  br i1 %.not18, label %._crit_edge17, label %.lr.ph16

.lr.ph16:                                         ; preds = %1
  %3 = getelementptr inbounds i8, ptr %0, i64 4
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  br label %5

5:                                                ; preds = %.lr.ph16, %._crit_edge
  %indvars.iv21 = phi i64 [ 0, %.lr.ph16 ], [ %indvars.iv.next22, %._crit_edge ]
  %6 = trunc nuw i64 %indvars.iv21 to i32
  %7 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %6)
  %8 = load i32, ptr %3, align 4, !tbaa !11
  %.not19 = icmp eq i32 %8, 0
  br i1 %.not19, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %5, %21
  %indvars.iv = phi i64 [ %indvars.iv.next, %21 ], [ 0, %5 ]
  %9 = load ptr, ptr %4, align 8, !tbaa !12
  %10 = getelementptr inbounds ptr, ptr %9, i64 %indvars.iv21
  %11 = load ptr, ptr %10, align 8, !tbaa !13
  %12 = getelementptr inbounds float, ptr %11, i64 %indvars.iv
  %13 = load float, ptr %12, align 4, !tbaa !14
  %14 = fpext float %13 to double
  %15 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, double noundef %14)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %16 = and i64 %indvars.iv.next, 15
  %17 = icmp ne i64 %16, 0
  %.pre24 = load i32, ptr %3, align 4, !tbaa !11
  %18 = zext i32 %.pre24 to i64
  %.not = icmp eq i64 %indvars.iv.next, %18
  %or.cond = select i1 %17, i1 true, i1 %.not
  br i1 %or.cond, label %21, label %19

19:                                               ; preds = %.lr.ph
  %20 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  %.pre = load i32, ptr %3, align 4, !tbaa !11
  br label %21

21:                                               ; preds = %.lr.ph, %19
  %22 = phi i32 [ %.pre24, %.lr.ph ], [ %.pre, %19 ]
  %23 = zext i32 %22 to i64
  %24 = icmp ult i64 %indvars.iv.next, %23
  br i1 %24, label %.lr.ph, label %._crit_edge, !llvm.loop !16

._crit_edge:                                      ; preds = %21, %5
  %25 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %indvars.iv.next22 = add nuw nsw i64 %indvars.iv21, 1
  %26 = load i32, ptr %0, align 8, !tbaa !5
  %27 = zext i32 %26 to i64
  %28 = icmp ult i64 %indvars.iv.next22, %27
  br i1 %28, label %5, label %._crit_edge17, !llvm.loop !18

._crit_edge17:                                    ; preds = %._crit_edge, %1
  ret void
}

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

attributes #0 = { nofree 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 = { 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" }

!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 = !{!"acorrs_obj", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = !{!6, !10, i64 8}
!13 = !{!10, !10, i64 0}
!14 = !{!15, !15, i64 0}
!15 = !{!"float", !8, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}
!18 = distinct !{!18, !17}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass