; LLVM IR from sca-secure-library-sca25519/sca25519 :: STM32F407-ephemeral/crypto/numerics (sc25519)

; 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"

%union.UN_512bitValue_ = type { [8 x i64] }

; Function Attrs: nounwind uwtable
define dso_local void @sc25519_from32bytes(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %union.UN_512bitValue_, align 8
  %6 = alloca i8, align 1
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 64, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #2
  store i8 0, ptr %6, align 1, !tbaa !9
  br label %7

7:                                                ; preds = %20, %2
  %8 = load i8, ptr %6, align 1, !tbaa !9
  %9 = zext i8 %8 to i32
  %10 = icmp slt i32 %9, 32
  br i1 %10, label %11, label %23

11:                                               ; preds = %7
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i8, ptr %6, align 1, !tbaa !9
  %14 = zext i8 %13 to i64
  %15 = getelementptr inbounds i8, ptr %12, i64 %14
  %16 = load i8, ptr %15, align 1, !tbaa !9
  %17 = load i8, ptr %6, align 1, !tbaa !9
  %18 = zext i8 %17 to i64
  %19 = getelementptr inbounds [64 x i8], ptr %5, i64 0, i64 %18
  store i8 %16, ptr %19, align 1, !tbaa !9
  br label %20

20:                                               ; preds = %11
  %21 = load i8, ptr %6, align 1, !tbaa !9
  %22 = add i8 %21, 1
  store i8 %22, ptr %6, align 1, !tbaa !9
  br label %7, !llvm.loop !10

23:                                               ; preds = %7
  store i8 8, ptr %6, align 1, !tbaa !9
  br label %24

24:                                               ; preds = %32, %23
  %25 = load i8, ptr %6, align 1, !tbaa !9
  %26 = zext i8 %25 to i32
  %27 = icmp slt i32 %26, 16
  br i1 %27, label %28, label %35

28:                                               ; preds = %24
  %29 = load i8, ptr %6, align 1, !tbaa !9
  %30 = zext i8 %29 to i64
  %31 = getelementptr inbounds [16 x i32], ptr %5, i64 0, i64 %30
  store i32 0, ptr %31, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %28
  %33 = load i8, ptr %6, align 1, !tbaa !9
  %34 = add i8 %33, 1
  store i8 %34, ptr %6, align 1, !tbaa !9
  br label %24, !llvm.loop !12

35:                                               ; preds = %24
  call void @sc25519_reduce(ptr noundef %5)
  store i8 0, ptr %6, align 1, !tbaa !9
  br label %36

36:                                               ; preds = %49, %35
  %37 = load i8, ptr %6, align 1, !tbaa !9
  %38 = zext i8 %37 to i32
  %39 = icmp slt i32 %38, 8
  br i1 %39, label %40, label %52

40:                                               ; preds = %36
  %41 = load i8, ptr %6, align 1, !tbaa !9
  %42 = zext i8 %41 to i64
  %43 = getelementptr inbounds [16 x i32], ptr %5, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !9
  %45 = load ptr, ptr %3, align 8, !tbaa !5
  %46 = load i8, ptr %6, align 1, !tbaa !9
  %47 = zext i8 %46 to i64
  %48 = getelementptr inbounds [8 x i32], ptr %45, i64 0, i64 %47
  store i32 %44, ptr %48, align 4, !tbaa !9
  br label %49

49:                                               ; preds = %40
  %50 = load i8, ptr %6, align 1, !tbaa !9
  %51 = add i8 %50, 1
  store i8 %51, ptr %6, align 1, !tbaa !9
  br label %36, !llvm.loop !13

52:                                               ; preds = %36
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 64, ptr %5) #2
  ret void
}

; 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 dso_local void @sc25519_reduce(ptr 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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"llvm.loop.mustprogress"}
!12 = distinct !{!12, !11}
!13 = distinct !{!13, !11}


; 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"

%union.UN_512bitValue_ = type { [8 x i64] }

; Function Attrs: nounwind uwtable
define dso_local void @sc25519_from32bytes(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
.preheader.preheader:
  %2 = alloca %union.UN_512bitValue_, align 8
  call void @llvm.lifetime.start.p0(i64 64, ptr nonnull %2) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %2, ptr noundef nonnull align 1 dereferenceable(32) %1, i64 32, i1 false), !tbaa !5
  %scevgep = getelementptr inbounds i8, ptr %2, i64 32
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %scevgep, i8 0, i64 32, i1 false), !tbaa !5
  call void @sc25519_reduce(ptr noundef nonnull %2)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 4 dereferenceable(32) %0, ptr noundef nonnull align 8 dereferenceable(32) %2, i64 32, i1 false), !tbaa !5
  call void @llvm.lifetime.end.p0(i64 64, ptr nonnull %2) #4
  ret void
}

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

; Function Attrs: nounwind uwtable
declare dso_local void @sc25519_reduce(ptr noundef) local_unnamed_addr #0

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass