; LLVM IR from microsoft/vOW4SIKE_on_HW :: SIKE_sw/src/sha3 (fips202)

; 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
declare hidden void @keccak_absorb(ptr noundef, i32 noundef, ptr noundef, i64 noundef, i8 noundef zeroext) #1

; Function Attrs: nounwind uwtable
declare hidden void @keccak_squeezeblocks(ptr noundef, i64 noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @shake256(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) #1 {
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca [25 x i64], align 16
  %10 = alloca [136 x i8], align 16
  %11 = alloca i64, align 8
  %12 = alloca i64, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  store ptr %2, ptr %7, align 8, !tbaa !5
  store i64 %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 200, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 136, ptr %10) #2
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #2
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = udiv i64 %13, 136
  store i64 %14, ptr %11, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %12) #2
  store i64 0, ptr %12, align 8, !tbaa !11
  br label %15

15:                                               ; preds = %21, %4
  %16 = load i64, ptr %12, align 8, !tbaa !11
  %17 = icmp ult i64 %16, 25
  br i1 %17, label %18, label %24

18:                                               ; preds = %15
  %19 = load i64, ptr %12, align 8, !tbaa !11
  %20 = getelementptr inbounds [25 x i64], ptr %9, i64 0, i64 %19
  store i64 0, ptr %20, align 8, !tbaa !11
  br label %21

21:                                               ; preds = %18
  %22 = load i64, ptr %12, align 8, !tbaa !11
  %23 = add i64 %22, 1
  store i64 %23, ptr %12, align 8, !tbaa !11
  br label %15, !llvm.loop !13

24:                                               ; preds = %15
  %25 = getelementptr inbounds [25 x i64], ptr %9, i64 0, i64 0
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = load i64, ptr %8, align 8, !tbaa !9
  call void @keccak_absorb(ptr noundef %25, i32 noundef 136, ptr noundef %26, i64 noundef %27, i8 noundef zeroext 31)
  %28 = load ptr, ptr %5, align 8, !tbaa !5
  %29 = load i64, ptr %11, align 8, !tbaa !9
  %30 = getelementptr inbounds [25 x i64], ptr %9, i64 0, i64 0
  call void @keccak_squeezeblocks(ptr noundef %28, i64 noundef %29, ptr noundef %30, i32 noundef 136)
  %31 = load i64, ptr %11, align 8, !tbaa !9
  %32 = mul i64 %31, 136
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = getelementptr inbounds i8, ptr %33, i64 %32
  store ptr %34, ptr %5, align 8, !tbaa !5
  %35 = load i64, ptr %11, align 8, !tbaa !9
  %36 = mul i64 %35, 136
  %37 = load i64, ptr %6, align 8, !tbaa !9
  %38 = sub i64 %37, %36
  store i64 %38, ptr %6, align 8, !tbaa !9
  %39 = load i64, ptr %6, align 8, !tbaa !9
  %40 = icmp ne i64 %39, 0
  br i1 %40, label %41, label %59

41:                                               ; preds = %24
  %42 = getelementptr inbounds [136 x i8], ptr %10, i64 0, i64 0
  %43 = getelementptr inbounds [25 x i64], ptr %9, i64 0, i64 0
  call void @keccak_squeezeblocks(ptr noundef %42, i64 noundef 1, ptr noundef %43, i32 noundef 136)
  store i64 0, ptr %12, align 8, !tbaa !11
  br label %44

44:                                               ; preds = %55, %41
  %45 = load i64, ptr %12, align 8, !tbaa !11
  %46 = load i64, ptr %6, align 8, !tbaa !9
  %47 = icmp ult i64 %45, %46
  br i1 %47, label %48, label %58

48:                                               ; preds = %44
  %49 = load i64, ptr %12, align 8, !tbaa !11
  %50 = getelementptr inbounds [136 x i8], ptr %10, i64 0, i64 %49
  %51 = load i8, ptr %50, align 1, !tbaa !15
  %52 = load ptr, ptr %5, align 8, !tbaa !5
  %53 = load i64, ptr %12, align 8, !tbaa !11
  %54 = getelementptr inbounds i8, ptr %52, i64 %53
  store i8 %51, ptr %54, align 1, !tbaa !15
  br label %55

55:                                               ; preds = %48
  %56 = load i64, ptr %12, align 8, !tbaa !11
  %57 = add i64 %56, 1
  store i64 %57, ptr %12, align 8, !tbaa !11
  br label %44, !llvm.loop !16

58:                                               ; preds = %44
  br label %59

59:                                               ; preds = %58, %24
  call void @llvm.lifetime.end.p0(i64 8, ptr %12) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #2
  call void @llvm.lifetime.end.p0(i64 136, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 200, ptr %9) #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 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = !{!7, !7, i64 0}
!16 = distinct !{!16, !14}


; 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: 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 void @keccak_absorb(ptr noundef, i32 noundef, ptr noundef, i64 noundef, i8 noundef zeroext) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare hidden void @keccak_squeezeblocks(ptr noundef, i64 noundef, ptr noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local void @shake256(ptr noundef %0, i64 noundef %1, ptr noundef %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = alloca [25 x i64], align 16
  %6 = alloca [136 x i8], align 16
  call void @llvm.lifetime.start.p0(i64 200, ptr nonnull %5) #5
  call void @llvm.lifetime.start.p0(i64 136, ptr nonnull %6) #5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(200) %5, i8 0, i64 200, i1 false), !tbaa !5
  %7 = udiv i64 %1, 136
  %.recomposed = urem i64 %1, 136
  call void @keccak_absorb(ptr noundef nonnull %5, i32 noundef 136, ptr noundef %2, i64 noundef %3, i8 noundef zeroext 31)
  call void @keccak_squeezeblocks(ptr noundef %0, i64 noundef %7, ptr noundef nonnull %5, i32 noundef 136)
  %8 = mul nuw i64 %7, 136
  %.not = icmp eq i64 %8, %1
  br i1 %.not, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %4
  %9 = getelementptr i8, ptr %0, i64 %8
  call void @keccak_squeezeblocks(ptr noundef nonnull %6, i64 noundef 1, ptr noundef nonnull %5, i32 noundef 136)
  %umax = call i64 @llvm.umax.i64(i64 %.recomposed, i64 1)
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 1 dereferenceable(1) %9, ptr noundef nonnull align 16 dereferenceable(1) %6, i64 %umax, i1 false), !tbaa !9
  br label %.loopexit

.loopexit:                                        ; preds = %.lr.ph.preheader, %4
  call void @llvm.lifetime.end.p0(i64 136, ptr nonnull %6) #5
  call void @llvm.lifetime.end.p0(i64 200, ptr nonnull %5) #5
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umax.i64(i64, i64) #3

; 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) #4

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}


; Effective O3 passes: DivRemPairsPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,SCCPPass,SROAPass,SimplifyCFGPass