; LLVM IR from lichen-community-systems/signaletic :: hosts/daisy/vendor/libDaisy/Middlewares/ST/STM32_USB_Device_Library/Core/Src (SOF)

; 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._USBD_HandleTypeDef = type { i8, i32, i32, i32, i32, [15 x %struct.USBD_EndpointTypeDef], [15 x %struct.USBD_EndpointTypeDef], i32, i32, i8, i8, i8, i8, i8, i32, %struct.usb_setup_req, ptr, ptr, ptr, ptr, ptr }
%struct.USBD_EndpointTypeDef = type { i32, i32, i32, i32, i32 }
%struct.usb_setup_req = type { i8, i8, i16, i16, i16 }
%struct._Device_cb = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
define dso_local i32 @USBD_LL_SOF(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds %struct._USBD_HandleTypeDef, ptr %3, i32 0, i32 9
  %5 = load i8, ptr %4, align 4, !tbaa !9
  %6 = zext i8 %5 to i32
  %7 = icmp eq i32 %6, 3
  br i1 %7, label %8, label %24

8:                                                ; preds = %1
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct._USBD_HandleTypeDef, ptr %9, i32 0, i32 17
  %11 = load ptr, ptr %10, align 8, !tbaa !14
  %12 = getelementptr inbounds %struct._Device_cb, ptr %11, i32 0, i32 7
  %13 = load ptr, ptr %12, align 8, !tbaa !15
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %23

15:                                               ; preds = %8
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct._USBD_HandleTypeDef, ptr %16, i32 0, i32 17
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = getelementptr inbounds %struct._Device_cb, ptr %18, i32 0, i32 7
  %20 = load ptr, ptr %19, align 8, !tbaa !15
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = call zeroext i8 %20(ptr noundef %21)
  br label %23

23:                                               ; preds = %15, %8
  br label %24

24:                                               ; preds = %23, %1
  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" }

!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, !7, i64 628}
!10 = !{!"_USBD_HandleTypeDef", !7, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !7, i64 20, !7, i64 320, !11, i64 620, !11, i64 624, !7, i64 628, !7, i64 629, !7, i64 630, !7, i64 631, !7, i64 632, !11, i64 636, !12, i64 640, !6, i64 648, !6, i64 656, !6, i64 664, !6, i64 672, !6, i64 680}
!11 = !{!"int", !7, i64 0}
!12 = !{!"usb_setup_req", !7, i64 0, !7, i64 1, !13, i64 2, !13, i64 4, !13, i64 6}
!13 = !{!"short", !7, i64 0}
!14 = !{!10, !6, i64 656}
!15 = !{!16, !6, i64 56}
!16 = !{!"_Device_cb", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88, !6, i64 96, !6, i64 104, !6, i64 112}


; 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
define dso_local noundef i32 @USBD_LL_SOF(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 628
  %3 = load i8, ptr %2, align 4, !tbaa !5
  %4 = icmp eq i8 %3, 3
  br i1 %4, label %5, label %12

5:                                                ; preds = %1
  %6 = getelementptr inbounds i8, ptr %0, i64 656
  %7 = load ptr, ptr %6, align 8, !tbaa !13
  %8 = getelementptr inbounds i8, ptr %7, i64 56
  %9 = load ptr, ptr %8, align 8, !tbaa !14
  %.not = icmp eq ptr %9, null
  br i1 %.not, label %12, label %10

10:                                               ; preds = %5
  %11 = tail call zeroext i8 %9(ptr noundef nonnull %0) #1
  br label %12

12:                                               ; preds = %5, %10, %1
  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 = { 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, !7, i64 628}
!6 = !{!"_USBD_HandleTypeDef", !7, i64 0, !9, i64 4, !9, i64 8, !9, i64 12, !9, i64 16, !7, i64 20, !7, i64 320, !9, i64 620, !9, i64 624, !7, i64 628, !7, i64 629, !7, i64 630, !7, i64 631, !7, i64 632, !9, i64 636, !10, i64 640, !12, i64 648, !12, i64 656, !12, i64 664, !12, i64 672, !12, i64 680}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!"usb_setup_req", !7, i64 0, !7, i64 1, !11, i64 2, !11, i64 4, !11, i64 6}
!11 = !{!"short", !7, i64 0}
!12 = !{!"any pointer", !7, i64 0}
!13 = !{!6, !12, i64 656}
!14 = !{!15, !12, i64 56}
!15 = !{!"_Device_cb", !12, i64 0, !12, i64 8, !12, i64 16, !12, i64 24, !12, i64 32, !12, i64 40, !12, i64 48, !12, i64 56, !12, i64 64, !12, i64 72, !12, i64 80, !12, i64 88, !12, i64 96, !12, i64 104, !12, i64 112}


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