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

; 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.CRC_HandleTypeDef = type { ptr, %struct.CRC_InitTypeDef, i32, i32, i32 }
%struct.CRC_InitTypeDef = type { i8, i8, i32, i32, i32, i32, i32 }
%struct.CRC_TypeDef = type { i32, i32, i32, i32, i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @HAL_CRC_Accumulate(ptr noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.CRC_HandleTypeDef, ptr %9, i32 0, i32 3
  store volatile i32 2, ptr %10, align 4, !tbaa !11
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.CRC_HandleTypeDef, ptr %11, i32 0, i32 4
  %13 = load i32, ptr %12, align 8, !tbaa !14
  switch i32 %13, label %48 [
    i32 3, label %14
    i32 1, label %38
    i32 2, label %43
  ]

14:                                               ; preds = %3
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %29, %14
  %16 = load i32, ptr %7, align 4, !tbaa !9
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = icmp ult i32 %16, %17
  br i1 %18, label %19, label %32

19:                                               ; preds = %15
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = load i32, ptr %7, align 4, !tbaa !9
  %22 = zext i32 %21 to i64
  %23 = getelementptr inbounds i32, ptr %20, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.CRC_HandleTypeDef, ptr %25, i32 0, i32 0
  %27 = load ptr, ptr %26, align 8, !tbaa !15
  %28 = getelementptr inbounds %struct.CRC_TypeDef, ptr %27, i32 0, i32 0
  store volatile i32 %24, ptr %28, align 4, !tbaa !16
  br label %29

29:                                               ; preds = %19
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = add i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !9
  br label %15, !llvm.loop !18

32:                                               ; preds = %15
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds %struct.CRC_HandleTypeDef, ptr %33, i32 0, i32 0
  %35 = load ptr, ptr %34, align 8, !tbaa !15
  %36 = getelementptr inbounds %struct.CRC_TypeDef, ptr %35, i32 0, i32 0
  %37 = load volatile i32, ptr %36, align 4, !tbaa !16
  store i32 %37, ptr %8, align 4, !tbaa !9
  br label %49

38:                                               ; preds = %3
  %39 = load ptr, ptr %4, align 8, !tbaa !5
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = call i32 @CRC_Handle_8(ptr noundef %39, ptr noundef %40, i32 noundef %41)
  store i32 %42, ptr %8, align 4, !tbaa !9
  br label %49

43:                                               ; preds = %3
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = call i32 @CRC_Handle_16(ptr noundef %44, ptr noundef %45, i32 noundef %46)
  store i32 %47, ptr %8, align 4, !tbaa !9
  br label %49

48:                                               ; preds = %3
  br label %49

49:                                               ; preds = %48, %43, %38, %32
  %50 = load ptr, ptr %4, align 8, !tbaa !5
  %51 = getelementptr inbounds %struct.CRC_HandleTypeDef, ptr %50, i32 0, i32 3
  store volatile i32 1, ptr %51, align 4, !tbaa !11
  %52 = load i32, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %52
}

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

; Function Attrs: nounwind uwtable
declare hidden i32 @CRC_Handle_8(ptr noundef, ptr noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
declare hidden i32 @CRC_Handle_16(ptr noundef, ptr noundef, i32 noundef) #0

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

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}
!11 = !{!12, !10, i64 36}
!12 = !{!"", !6, i64 0, !13, i64 8, !10, i64 32, !10, i64 36, !10, i64 40}
!13 = !{!"", !7, i64 0, !7, i64 1, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!14 = !{!12, !10, i64 40}
!15 = !{!12, !6, i64 0}
!16 = !{!17, !10, i64 0}
!17 = !{!"", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !10, i64 16, !10, i64 20}
!18 = distinct !{!18, !19}
!19 = !{!"llvm.loop.mustprogress"}


; 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 i32 @HAL_CRC_Accumulate(ptr noundef %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = getelementptr inbounds i8, ptr %0, i64 36
  store volatile i32 2, ptr %4, align 4, !tbaa !5
  %5 = getelementptr inbounds i8, ptr %0, i64 40
  %6 = load i32, ptr %5, align 8, !tbaa !12
  switch i32 %6, label %32 [
    i32 3, label %.preheader
    i32 1, label %28
    i32 2, label %30
  ]

.preheader:                                       ; preds = %3
  %.not = icmp eq i32 %2, 0
  %.pre = load ptr, ptr %0, align 8, !tbaa !13
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %.preheader
  %wide.trip.count = zext i32 %2 to i64
  %xtraiter = and i64 %wide.trip.count, 7
  %7 = icmp ult i32 %2, 8
  br i1 %7, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.new

.lr.ph.new:                                       ; preds = %.lr.ph
  %unroll_iter = and i64 %wide.trip.count, 4294967288
  br label %8

8:                                                ; preds = %8, %.lr.ph.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.new ], [ %indvars.iv.next.7, %8 ]
  %niter = phi i64 [ 0, %.lr.ph.new ], [ %niter.next.7, %8 ]
  %9 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %10 = load i32, ptr %9, align 4, !tbaa !14
  store volatile i32 %10, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %11 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next
  %12 = load i32, ptr %11, align 4, !tbaa !14
  store volatile i32 %12, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.1 = or disjoint i64 %indvars.iv, 2
  %13 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.1
  %14 = load i32, ptr %13, align 4, !tbaa !14
  store volatile i32 %14, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.2 = or disjoint i64 %indvars.iv, 3
  %15 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.2
  %16 = load i32, ptr %15, align 4, !tbaa !14
  store volatile i32 %16, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.3 = or disjoint i64 %indvars.iv, 4
  %17 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.3
  %18 = load i32, ptr %17, align 4, !tbaa !14
  store volatile i32 %18, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.4 = or disjoint i64 %indvars.iv, 5
  %19 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.4
  %20 = load i32, ptr %19, align 4, !tbaa !14
  store volatile i32 %20, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.5 = or disjoint i64 %indvars.iv, 6
  %21 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.5
  %22 = load i32, ptr %21, align 4, !tbaa !14
  store volatile i32 %22, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.6 = or disjoint i64 %indvars.iv, 7
  %23 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.6
  %24 = load i32, ptr %23, align 4, !tbaa !14
  store volatile i32 %24, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.7 = add nuw nsw i64 %indvars.iv, 8
  %niter.next.7 = add i64 %niter, 8
  %niter.ncmp.7 = icmp eq i64 %niter.next.7, %unroll_iter
  br i1 %niter.ncmp.7, label %._crit_edge.loopexit.unr-lcssa, label %8, !llvm.loop !17

._crit_edge.loopexit.unr-lcssa:                   ; preds = %8, %.lr.ph
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next.7, %8 ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.epil.preheader

.epil.preheader:                                  ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader
  %indvars.iv.epil = phi i64 [ %indvars.iv.next.epil, %.epil.preheader ], [ %indvars.iv.unr, %._crit_edge.loopexit.unr-lcssa ]
  %epil.iter = phi i64 [ %epil.iter.next, %.epil.preheader ], [ 0, %._crit_edge.loopexit.unr-lcssa ]
  %25 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.epil
  %26 = load i32, ptr %25, align 4, !tbaa !14
  store volatile i32 %26, ptr %.pre, align 4, !tbaa !15
  %indvars.iv.next.epil = add nuw nsw i64 %indvars.iv.epil, 1
  %epil.iter.next = add i64 %epil.iter, 1
  %epil.iter.cmp.not = icmp eq i64 %epil.iter.next, %xtraiter
  br i1 %epil.iter.cmp.not, label %._crit_edge, label %.epil.preheader, !llvm.loop !19

._crit_edge:                                      ; preds = %._crit_edge.loopexit.unr-lcssa, %.epil.preheader, %.preheader
  %27 = load volatile i32, ptr %.pre, align 4, !tbaa !15
  br label %32

28:                                               ; preds = %3
  %29 = tail call i32 @CRC_Handle_8(ptr noundef nonnull %0, ptr noundef %1, i32 noundef %2)
  br label %32

30:                                               ; preds = %3
  %31 = tail call i32 @CRC_Handle_16(ptr noundef nonnull %0, ptr noundef %1, i32 noundef %2)
  br label %32

32:                                               ; preds = %3, %30, %28, %._crit_edge
  %.0 = phi i32 [ 0, %3 ], [ %31, %30 ], [ %29, %28 ], [ %27, %._crit_edge ]
  store volatile i32 1, ptr %4, align 4, !tbaa !5
  ret i32 %.0
}

; Function Attrs: nounwind uwtable
declare hidden i32 @CRC_Handle_8(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare hidden i32 @CRC_Handle_16(ptr noundef, ptr noundef, i32 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" }

!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 36}
!6 = !{!"", !7, i64 0, !10, i64 8, !11, i64 32, !11, i64 36, !11, i64 40}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"", !8, i64 0, !8, i64 1, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20}
!11 = !{!"int", !8, i64 0}
!12 = !{!6, !11, i64 40}
!13 = !{!6, !7, i64 0}
!14 = !{!11, !11, i64 0}
!15 = !{!16, !11, i64 0}
!16 = !{!"", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !11, i64 20}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.unroll.disable"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass