; LLVM IR from Stephane-D/SGDK :: sample/snd/xgm-player/src (psg_state)

; 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.PSG = type { [4 x i16], [4 x i16], i16, i16 }

; Function Attrs: nounwind uwtable
define dso_local void @PSGState_init(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i16, align 2
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 2, ptr %3) #2
  store i16 0, ptr %3, align 2, !tbaa !9
  br label %4

4:                                                ; preds = %19, %1
  %5 = load i16, ptr %3, align 2, !tbaa !9
  %6 = zext i16 %5 to i32
  %7 = icmp slt i32 %6, 4
  br i1 %7, label %8, label %22

8:                                                ; preds = %4
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.PSG, ptr %9, i32 0, i32 1
  %11 = load i16, ptr %3, align 2, !tbaa !9
  %12 = zext i16 %11 to i64
  %13 = getelementptr inbounds [4 x i16], ptr %10, i64 0, i64 %12
  store i16 15, ptr %13, align 2, !tbaa !9
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.PSG, ptr %14, i32 0, i32 0
  %16 = load i16, ptr %3, align 2, !tbaa !9
  %17 = zext i16 %16 to i64
  %18 = getelementptr inbounds [4 x i16], ptr %15, i64 0, i64 %17
  store i16 0, ptr %18, align 2, !tbaa !9
  br label %19

19:                                               ; preds = %8
  %20 = load i16, ptr %3, align 2, !tbaa !9
  %21 = add i16 %20, 1
  store i16 %21, ptr %3, align 2, !tbaa !9
  br label %4, !llvm.loop !11

22:                                               ; preds = %4
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.PSG, ptr %23, i32 0, i32 2
  store i16 0, ptr %24, align 2, !tbaa !13
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.PSG, ptr %25, i32 0, i32 3
  store i16 0, ptr %26, align 2, !tbaa !15
  call void @llvm.lifetime.end.p0(i64 2, ptr %3) #2
  ret void
}

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

; 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 = { 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 = !{!"short", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = !{!14, !10, i64 16}
!14 = !{!"", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 18}
!15 = !{!14, !10, i64 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) uwtable
define dso_local void @PSGState_init(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  store i64 0, ptr %0, align 2
  store <4 x i16> <i16 15, i16 15, i16 15, i16 15>, ptr %2, align 2, !tbaa !5
  %3 = getelementptr inbounds i8, ptr %0, i64 16
  store i16 0, ptr %3, align 2, !tbaa !9
  %4 = getelementptr inbounds i8, ptr %0, i64 18
  store i16 0, ptr %4, align 2, !tbaa !11
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: write) 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" }

!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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 16}
!10 = !{!"", !7, i64 0, !7, i64 8, !6, i64 16, !6, i64 18}
!11 = !{!10, !6, i64 18}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,PostOrderFunctionAttrsPass,SLPVectorizerPass,SROAPass,SimplifyCFGPass