; LLVM IR from lichen-community-systems/signaletic :: hosts/daisy/vendor/libDaisy/Drivers/STM32H7xx_HAL_Driver/Src (ReadReg)

; 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.MDIOS_HandleTypeDef = type { ptr, %struct.MDIOS_InitTypeDef, i32, i32, i32 }
%struct.MDIOS_InitTypeDef = type { i32, i32 }

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

10:                                               ; preds = %3
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.MDIOS_HandleTypeDef, ptr %11, i32 0, i32 4
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp eq i32 %13, 1
  br i1 %14, label %15, label %16

15:                                               ; preds = %10
  store i32 2, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %38

16:                                               ; preds = %10
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.MDIOS_HandleTypeDef, ptr %17, i32 0, i32 4
  store i32 1, ptr %18, align 8, !tbaa !11
  br label %19

19:                                               ; preds = %16
  br label %20

20:                                               ; preds = %19
  br label %21

21:                                               ; preds = %20
  %22 = load i32, ptr %6, align 4, !tbaa !9
  %23 = mul i32 4, %22
  %24 = zext i32 %23 to i64
  %25 = add i64 1073779968, %24
  %26 = trunc i64 %25 to i32
  store i32 %26, ptr %8, align 4, !tbaa !9
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = zext i32 %27 to i64
  %29 = inttoptr i64 %28 to ptr
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = trunc i32 %30 to i16
  %32 = load ptr, ptr %7, align 8, !tbaa !5
  store i16 %31, ptr %32, align 2, !tbaa !14
  br label %33

33:                                               ; preds = %21
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.MDIOS_HandleTypeDef, ptr %34, i32 0, i32 4
  store i32 0, ptr %35, align 8, !tbaa !11
  br label %36

36:                                               ; preds = %33
  br label %37

37:                                               ; preds = %36
  store i32 0, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %38

38:                                               ; preds = %37, %15
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %39 = load i32, ptr %4, align 4
  ret i32 %39
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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, !10, i64 24}
!12 = !{!"", !6, i64 0, !13, i64 8, !10, i64 16, !10, i64 20, !10, i64 24}
!13 = !{!"", !10, i64 0, !10, i64 4}
!14 = !{!15, !15, i64 0}
!15 = !{!"short", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local range(i32 0, 3) i32 @HAL_MDIOS_ReadReg(ptr nocapture noundef %0, i32 noundef %1, ptr nocapture noundef writeonly %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 24
  %5 = load i32, ptr %4, align 8, !tbaa !5
  %6 = icmp eq i32 %5, 1
  br i1 %6, label %14, label %7

7:                                                ; preds = %3
  store i32 1, ptr %4, align 8, !tbaa !5
  %8 = shl i32 %1, 2
  %9 = add i32 %8, 1073779968
  %10 = zext i32 %9 to i64
  %11 = inttoptr i64 %10 to ptr
  %12 = load i32, ptr %11, align 4, !tbaa !12
  %13 = trunc i32 %12 to i16
  store i16 %13, ptr %2, align 2, !tbaa !13
  store i32 0, ptr %4, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %3, %7
  %.0 = phi i32 [ 0, %7 ], [ 2, %3 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: readwrite, inaccessiblemem: none) 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, !11, i64 24}
!6 = !{!"", !7, i64 0, !10, i64 8, !11, i64 16, !11, i64 20, !11, i64 24}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"", !11, i64 0, !11, i64 4}
!11 = !{!"int", !8, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"short", !8, i64 0}


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