; LLVM IR from golioth/golioth-firmware-sdk :: src (ringbuf)

; 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.ringbuf_t = type { i32, i32, ptr, i64, i64 }

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @ringbuf_is_full(ptr noundef) #0

; 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

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @ringbuf_put(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %7 = load ptr, ptr %5, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %10, label %9

9:                                                ; preds = %2
  store i1 false, ptr %3, align 1
  br label %36

10:                                               ; preds = %2
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = call zeroext i1 @ringbuf_is_full(ptr noundef %11)
  br i1 %12, label %13, label %14

13:                                               ; preds = %10
  store i1 false, ptr %3, align 1
  br label %36

14:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = getelementptr inbounds %struct.ringbuf_t, ptr %15, i32 0, i32 2
  %17 = load ptr, ptr %16, align 8, !tbaa !9
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.ringbuf_t, ptr %18, i32 0, i32 0
  %20 = load volatile i32, ptr %19, align 8, !tbaa !13
  %21 = zext i32 %20 to i64
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.ringbuf_t, ptr %22, i32 0, i32 4
  %24 = load i64, ptr %23, align 8, !tbaa !14
  %25 = mul i64 %21, %24
  %26 = getelementptr inbounds i8, ptr %17, i64 %25
  store ptr %26, ptr %6, align 8, !tbaa !5
  %27 = load ptr, ptr %6, align 8, !tbaa !5
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.ringbuf_t, ptr %29, i32 0, i32 4
  %31 = load i64, ptr %30, align 8, !tbaa !14
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %27, ptr align 1 %28, i64 %31, i1 false)
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  %33 = call i32 @next_write_index(ptr noundef %32)
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.ringbuf_t, ptr %34, i32 0, i32 0
  store volatile i32 %33, ptr %35, align 8, !tbaa !13
  store i1 true, ptr %3, align 1
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %36

36:                                               ; preds = %14, %13, %9
  %37 = load i1, ptr %3, align 1
  ret i1 %37
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nounwind uwtable
declare hidden i32 @next_write_index(ptr noundef) #0

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 8}
!10 = !{!"", !11, i64 0, !11, i64 4, !6, i64 8, !12, i64 16, !12, i64 24}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!10, !11, i64 0}
!14 = !{!10, !12, i64 24}


; 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
declare dso_local zeroext i1 @ringbuf_is_full(ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @ringbuf_put(ptr noundef %0, ptr noundef readonly %1) local_unnamed_addr #0 {
  %.not = icmp eq ptr %1, null
  br i1 %.not, label %15, label %3

3:                                                ; preds = %2
  %4 = tail call zeroext i1 @ringbuf_is_full(ptr noundef %0)
  br i1 %4, label %15, label %5

5:                                                ; preds = %3
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = load volatile i32, ptr %0, align 8, !tbaa !12
  %9 = zext i32 %8 to i64
  %10 = getelementptr inbounds i8, ptr %0, i64 24
  %11 = load i64, ptr %10, align 8, !tbaa !13
  %12 = mul i64 %11, %9
  %13 = getelementptr inbounds i8, ptr %7, i64 %12
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %13, ptr nonnull align 1 %1, i64 %11, i1 false)
  %14 = tail call i32 @next_write_index(ptr noundef nonnull %0)
  store volatile i32 %14, ptr %0, align 8, !tbaa !12
  br label %15

15:                                               ; preds = %3, %2, %5
  %.0 = phi i1 [ true, %5 ], [ false, %2 ], [ false, %3 ]
  ret i1 %.0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #1

; Function Attrs: nounwind uwtable
declare hidden i32 @next_write_index(ptr noundef) local_unnamed_addr #0

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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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, !10, i64 8}
!6 = !{!"", !7, i64 0, !7, i64 4, !10, i64 8, !11, i64 16, !11, i64 24}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!6, !7, i64 0}
!13 = !{!6, !11, i64 24}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass