; 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_256bitValue_ = type { [4 x %union.UN_64bitValue_] }
%union.UN_64bitValue_ = type { [1 x i64] }

@__const.sc25519_inverse.order = external hidden unnamed_addr constant { [32 x i8] }, align 8

; 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
declare hidden i32 @bigint_add(ptr noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local void @sc25519_binary_extended_gcd(ptr noundef, ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @sc25519_inverse(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca %union.UN_256bitValue_, align 8
  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 32, ptr %5) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %5, ptr align 8 @__const.sc25519_inverse.order, i64 32, i1 false)
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  call void @sc25519_binary_extended_gcd(ptr noundef %6, ptr noundef %5, ptr noundef %7)
  br label %8

8:                                                ; preds = %14, %2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds [8 x i32], ptr %9, i64 0, i64 7
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = and i32 %11, -2147483648
  %13 = icmp ne i32 %12, 0
  br i1 %13, label %14, label %19

14:                                               ; preds = %8
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = getelementptr inbounds [8 x i32], ptr %15, i64 0, i64 0
  %17 = getelementptr inbounds [8 x i32], ptr %5, i64 0, i64 0
  %18 = call i32 @bigint_add(ptr noundef %16, ptr noundef %17, i32 noundef 8)
  br label %8, !llvm.loop !10

19:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 32, ptr %5) #3
  ret void
}

; 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

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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"}


; 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_256bitValue_ = type { [4 x %union.UN_64bitValue_] }
%union.UN_64bitValue_ = type { [1 x i64] }

@__const.sc25519_inverse.order = external hidden unnamed_addr constant { [32 x i8] }, align 8

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
declare hidden i32 @bigint_add(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @sc25519_binary_extended_gcd(ptr noundef, ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @sc25519_inverse(ptr noundef %0, ptr noundef %1) local_unnamed_addr #1 {
  %3 = alloca %union.UN_256bitValue_, align 8
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #3
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 8 dereferenceable(32) %3, ptr noundef nonnull align 8 dereferenceable(32) @__const.sc25519_inverse.order, i64 32, i1 false)
  call void @sc25519_binary_extended_gcd(ptr noundef %0, ptr noundef nonnull %3, ptr noundef %1)
  %4 = getelementptr inbounds i8, ptr %0, i64 28
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %.not4 = icmp sgt i32 %5, -1
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %.lr.ph
  %6 = call i32 @bigint_add(ptr noundef nonnull %0, ptr noundef nonnull %3, i32 noundef 8)
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %.not = icmp sgt i32 %7, -1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !8

._crit_edge:                                      ; preds = %.lr.ph, %2
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #3
  ret void
}

; Function Attrs: mustprogress 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

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { 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"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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