; LLVM IR from machinefi/psa-crypto-esp32 :: crypto (ecc)

; 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"

; 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 void @uECC_vli_nativeToBytes(ptr noundef %0, i32 noundef %1, ptr noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i8, align 1
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store ptr %2, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #2
  store i8 0, ptr %7, align 1, !tbaa !11
  br label %9

9:                                                ; preds = %35, %3
  %10 = load i8, ptr %7, align 1, !tbaa !11
  %11 = sext i8 %10 to i32
  %12 = load i32, ptr %5, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %14, label %38

14:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = sub nsw i32 %15, 1
  %17 = load i8, ptr %7, align 1, !tbaa !11
  %18 = sext i8 %17 to i32
  %19 = sub nsw i32 %16, %18
  store i32 %19, ptr %8, align 4, !tbaa !9
  %20 = load ptr, ptr %6, align 8, !tbaa !5
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = udiv i32 %21, 4
  %23 = zext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %20, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = load i32, ptr %8, align 4, !tbaa !9
  %27 = urem i32 %26, 4
  %28 = mul i32 8, %27
  %29 = lshr i32 %25, %28
  %30 = trunc i32 %29 to i8
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load i8, ptr %7, align 1, !tbaa !11
  %33 = sext i8 %32 to i64
  %34 = getelementptr inbounds i8, ptr %31, i64 %33
  store i8 %30, ptr %34, align 1, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %35

35:                                               ; preds = %14
  %36 = load i8, ptr %7, align 1, !tbaa !11
  %37 = add i8 %36, 1
  store i8 %37, ptr %7, align 1, !tbaa !11
  br label %9, !llvm.loop !12

38:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #2
  ret void
}

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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @uECC_vli_nativeToBytes(ptr nocapture noundef writeonly %0, i32 noundef %1, ptr nocapture noundef readonly %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %5 = phi i32 [ %19, %.lr.ph ], [ 0, %3 ]
  %.011 = phi i8 [ %18, %.lr.ph ], [ 0, %3 ]
  %6 = xor i32 %5, -1
  %7 = add i32 %6, %1
  %8 = lshr i32 %7, 2
  %9 = zext nneg i32 %8 to i64
  %10 = getelementptr inbounds i32, ptr %2, i64 %9
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = shl i32 %7, 3
  %13 = and i32 %12, 24
  %14 = lshr i32 %11, %13
  %15 = trunc i32 %14 to i8
  %16 = sext i8 %.011 to i64
  %17 = getelementptr inbounds i8, ptr %0, i64 %16
  store i8 %15, ptr %17, align 1, !tbaa !9
  %18 = add i8 %.011, 1
  %19 = sext i8 %18 to i32
  %20 = icmp slt i32 %19, %1
  br i1 %20, label %.lr.ph, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass