; LLVM IR from Eclipse-SDV-Hackathon-Chapter-Two/challenge-threadx-and-beyond :: MXChip/AZ3166/lib/mxchip_bsp/stm_sensor/Src (lsm6dsl_reg)

; 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.lsm6dsl_fifo_ctrl2_t = type { i8 }
%struct.lsm6dsl_master_config_t = type { i8 }

; Function Attrs: nounwind uwtable
declare dso_local i32 @lsm6dsl_read_reg(ptr noundef, i8 noundef zeroext, ptr noundef, i16 noundef zeroext) #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 i32 @lsm6dsl_fifo_write_trigger_get(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %struct.lsm6dsl_fifo_ctrl2_t, align 1
  %6 = alloca %struct.lsm6dsl_master_config_t, align 1
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = call i32 @lsm6dsl_read_reg(ptr noundef %8, i8 noundef zeroext 7, ptr noundef %5, i16 noundef zeroext 1)
  store i32 %9, ptr %7, align 4, !tbaa !9
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %34

12:                                               ; preds = %2
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = call i32 @lsm6dsl_read_reg(ptr noundef %13, i8 noundef zeroext 26, ptr noundef %6, i16 noundef zeroext 1)
  store i32 %14, ptr %7, align 4, !tbaa !9
  %15 = load i8, ptr %5, align 1
  %16 = lshr i8 %15, 6
  %17 = and i8 %16, 1
  %18 = zext i8 %17 to i32
  %19 = shl i32 %18, 1
  %20 = load i8, ptr %5, align 1
  %21 = lshr i8 %20, 6
  %22 = and i8 %21, 1
  %23 = zext i8 %22 to i32
  %24 = add nsw i32 %19, %23
  switch i32 %24, label %31 [
    i32 0, label %25
    i32 1, label %27
    i32 2, label %29
  ]

25:                                               ; preds = %12
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 0, ptr %26, align 4, !tbaa !9
  br label %33

27:                                               ; preds = %12
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 1, ptr %28, align 4, !tbaa !9
  br label %33

29:                                               ; preds = %12
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 2, ptr %30, align 4, !tbaa !9
  br label %33

31:                                               ; preds = %12
  %32 = load ptr, ptr %4, align 8, !tbaa !5
  store i32 3, ptr %32, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %31, %29, %27, %25
  br label %34

34:                                               ; preds = %33, %2
  %35 = load i32, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  ret i32 %35
}

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 = !{!"int", !7, i64 0}


; 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"

%struct.lsm6dsl_fifo_ctrl2_t = type { i8 }
%struct.lsm6dsl_master_config_t = type { i8 }

; Function Attrs: nounwind uwtable
declare dso_local i32 @lsm6dsl_read_reg(ptr noundef, i8 noundef zeroext, ptr noundef, i16 noundef zeroext) local_unnamed_addr #0

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

; Function Attrs: mustprogress 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 i32 @lsm6dsl_fifo_write_trigger_get(ptr noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = alloca %struct.lsm6dsl_fifo_ctrl2_t, align 1
  %4 = alloca %struct.lsm6dsl_master_config_t, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %4) #2
  %5 = call i32 @lsm6dsl_read_reg(ptr noundef %0, i8 noundef zeroext 7, ptr noundef nonnull %3, i16 noundef zeroext 1)
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %.sink.split, label %10

.sink.split:                                      ; preds = %2
  %7 = call i32 @lsm6dsl_read_reg(ptr noundef %0, i8 noundef zeroext 26, ptr noundef nonnull %4, i16 noundef zeroext 1)
  %8 = load i8, ptr %3, align 1
  %9 = and i8 %8, 64
  %.not = icmp eq i8 %9, 0
  %. = select i1 %.not, i32 0, i32 3
  store i32 %., ptr %1, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %.sink.split, %2
  %.0 = phi i32 [ %5, %2 ], [ %7, %.sink.split ]
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %4) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %3) #2
  ret i32 %.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 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


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