; LLVM IR from jgaeddert/liquid-dsp :: src/modem/src (ampmodem)

; 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.ampmodem_s = type { float, i32, i32, i32, ptr, ptr, ptr, ptr, ptr, ptr }

; 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 @ampmodem_demodulate_block(ptr noundef %0, ptr noundef %1, i32 noundef %2, ptr noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca { float, float }, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !9
  store ptr %3, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %43, %4
  %15 = load i32, ptr %10, align 4, !tbaa !9
  %16 = load i32, ptr %8, align 4, !tbaa !9
  %17 = icmp ult i32 %15, %16
  br i1 %17, label %18, label %46

18:                                               ; preds = %14
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.ampmodem_s, ptr %19, i32 0, i32 9
  %21 = load ptr, ptr %20, align 8, !tbaa !11
  %22 = load ptr, ptr %6, align 8, !tbaa !5
  %23 = load ptr, ptr %7, align 8, !tbaa !5
  %24 = load i32, ptr %10, align 4, !tbaa !9
  %25 = zext i32 %24 to i64
  %26 = getelementptr inbounds { float, float }, ptr %23, i64 %25
  %27 = getelementptr inbounds { float, float }, ptr %26, i32 0, i32 0
  %28 = load float, ptr %27, align 4
  %29 = getelementptr inbounds { float, float }, ptr %26, i32 0, i32 1
  %30 = load float, ptr %29, align 4
  %31 = load ptr, ptr %9, align 8, !tbaa !5
  %32 = load i32, ptr %10, align 4, !tbaa !9
  %33 = zext i32 %32 to i64
  %34 = getelementptr inbounds float, ptr %31, i64 %33
  %35 = getelementptr inbounds { float, float }, ptr %12, i32 0, i32 0
  %36 = getelementptr inbounds { float, float }, ptr %12, i32 0, i32 1
  store float %28, ptr %35, align 4
  store float %30, ptr %36, align 4
  %37 = load <2 x float>, ptr %12, align 4
  %38 = call i32 %21(ptr noundef %22, <2 x float> noundef %37, ptr noundef %34)
  store i32 %38, ptr %11, align 4, !tbaa !9
  %39 = icmp ne i32 %38, 0
  br i1 %39, label %40, label %42

40:                                               ; preds = %18
  %41 = load i32, ptr %11, align 4, !tbaa !9
  store i32 %41, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %47

42:                                               ; preds = %18
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %10, align 4, !tbaa !9
  %45 = add i32 %44, 1
  store i32 %45, ptr %10, align 4, !tbaa !9
  br label %14, !llvm.loop !14

46:                                               ; preds = %14
  store i32 0, ptr %5, align 4
  store i32 1, ptr %13, align 4
  br label %47

47:                                               ; preds = %46, %40
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  %48 = load i32, ptr %5, align 4
  ret i32 %48
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="64" "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 = !{!"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, !6, i64 56}
!12 = !{!"ampmodem_s", !13, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56}
!13 = !{!"float", !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

; Function Attrs: nounwind uwtable
define dso_local i32 @ampmodem_demodulate_block(ptr noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2, ptr noundef %3) local_unnamed_addr #0 {
  %5 = getelementptr inbounds i8, ptr %0, i64 56
  %.not16 = icmp eq i32 %2, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %wide.trip.count = zext i32 %2 to i64
  br label %.lr.ph

6:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph.preheader, %6
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %6 ]
  %7 = load ptr, ptr %5, align 8, !tbaa !7
  %8 = getelementptr inbounds { float, float }, ptr %1, i64 %indvars.iv
  %9 = load <2 x float>, ptr %8, align 4
  %10 = getelementptr inbounds float, ptr %3, i64 %indvars.iv
  %11 = tail call i32 %7(ptr noundef %0, <2 x float> noundef %9, ptr noundef %10) #1
  %.not = icmp eq i32 %11, 0
  br i1 %.not, label %6, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %6, %4
  %.0 = phi i32 [ 0, %4 ], [ 0, %6 ], [ %11, %.lr.ph ]
  ret i32 %.0
}

attributes #0 = { nounwind uwtable "min-legal-vector-width"="64" "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 = { 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !13, i64 56}
!8 = !{!"ampmodem_s", !9, i64 0, !12, i64 4, !12, i64 8, !12, i64 12, !13, i64 16, !13, i64 24, !13, i64 32, !13, i64 40, !13, i64 48, !13, i64 56}
!9 = !{!"float", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C/C++ TBAA"}
!12 = !{!"int", !10, i64 0}
!13 = !{!"any pointer", !10, i64 0}


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