; 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_ctrl10_c_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
declare dso_local i32 @lsm6dsl_write_reg(ptr noundef, i8 noundef zeroext, ptr noundef, i16 noundef zeroext) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @lsm6dsl_pedo_sens_set(ptr noundef %0, i8 noundef zeroext %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i8, align 1
  %5 = alloca %struct.lsm6dsl_ctrl10_c_t, align 1
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i8 %1, ptr %4, align 1, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call i32 @lsm6dsl_read_reg(ptr noundef %7, i8 noundef zeroext 25, ptr noundef %5, i16 noundef zeroext 1)
  store i32 %8, ptr %6, align 4, !tbaa !10
  %9 = load i32, ptr %6, align 4, !tbaa !10
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %31

11:                                               ; preds = %2
  %12 = load i8, ptr %4, align 1, !tbaa !9
  %13 = load i8, ptr %5, align 1
  %14 = and i8 %12, 1
  %15 = shl i8 %14, 4
  %16 = and i8 %13, -17
  %17 = or i8 %16, %15
  store i8 %17, ptr %5, align 1
  %18 = load i8, ptr %4, align 1, !tbaa !9
  %19 = zext i8 %18 to i32
  %20 = icmp ne i32 %19, 0
  br i1 %20, label %21, label %28

21:                                               ; preds = %11
  %22 = load i8, ptr %4, align 1, !tbaa !9
  %23 = load i8, ptr %5, align 1
  %24 = and i8 %22, 1
  %25 = shl i8 %24, 2
  %26 = and i8 %23, -5
  %27 = or i8 %26, %25
  store i8 %27, ptr %5, align 1
  br label %28

28:                                               ; preds = %21, %11
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = call i32 @lsm6dsl_write_reg(ptr noundef %29, i8 noundef zeroext 25, ptr noundef %5, i16 noundef zeroext 1)
  store i32 %30, ptr %6, align 4, !tbaa !10
  br label %31

31:                                               ; preds = %28, %2
  %32 = load i32, ptr %6, align 4, !tbaa !10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 1, ptr %5) #2
  ret i32 %32
}

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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"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_ctrl10_c_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
declare dso_local i32 @lsm6dsl_write_reg(ptr noundef, i8 noundef zeroext, ptr noundef, i16 noundef zeroext) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @lsm6dsl_pedo_sens_set(ptr noundef %0, i8 noundef zeroext %1) local_unnamed_addr #0 {
  %3 = alloca %struct.lsm6dsl_ctrl10_c_t, align 1
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %3) #2
  %4 = call i32 @lsm6dsl_read_reg(ptr noundef %0, i8 noundef zeroext 25, ptr noundef nonnull %3, i16 noundef zeroext 1)
  %5 = icmp eq i32 %4, 0
  br i1 %5, label %6, label %15

6:                                                ; preds = %2
  %7 = load i8, ptr %3, align 1
  %8 = and i8 %1, 1
  %9 = shl nuw nsw i8 %8, 4
  %10 = and i8 %7, -17
  %.not = icmp eq i8 %1, 0
  %11 = shl nuw nsw i8 %8, 2
  %.masked = and i8 %7, -21
  %12 = or disjoint i8 %.masked, %9
  %13 = or disjoint i8 %12, %11
  %storemerge = select i1 %.not, i8 %10, i8 %13
  store i8 %storemerge, ptr %3, align 1
  %14 = call i32 @lsm6dsl_write_reg(ptr noundef %0, i8 noundef zeroext 25, ptr noundef nonnull %3, i16 noundef zeroext 1)
  br label %15

15:                                               ; preds = %6, %2
  %.0 = phi i32 [ %14, %6 ], [ %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)"}


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