; LLVM IR from CROSS-signature/CROSS-implementation :: Reference_Implementation/lib (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"

%struct.shake128ctx = type { [25 x i64] }

; Function Attrs: nounwind uwtable
define dso_local void @shake128_absorb(ptr noundef %0, ptr noundef %1, i64 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i64 %2, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !11
  br label %8

8:                                                ; preds = %17, %3
  %9 = load i32, ptr %7, align 4, !tbaa !11
  %10 = icmp slt i32 %9, 25
  br i1 %10, label %11, label %20

11:                                               ; preds = %8
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.shake128ctx, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %7, align 4, !tbaa !11
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [25 x i64], ptr %13, i64 0, i64 %15
  store i64 0, ptr %16, align 8, !tbaa !9
  br label %17

17:                                               ; preds = %11
  %18 = load i32, ptr %7, align 4, !tbaa !11
  %19 = add nsw i32 %18, 1
  store i32 %19, ptr %7, align 4, !tbaa !11
  br label %8, !llvm.loop !13

20:                                               ; preds = %8
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.shake128ctx, ptr %21, i32 0, i32 0
  %23 = getelementptr inbounds [25 x i64], ptr %22, i64 0, i64 0
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load i64, ptr %6, align 8, !tbaa !9
  call void @keccak_absorb(ptr noundef %23, i32 noundef 168, ptr noundef %24, i64 noundef %25, i8 noundef zeroext 31)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #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 hidden void @keccak_absorb(ptr noundef, i32 noundef, ptr noundef, i64 noundef, i8 noundef zeroext) #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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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 void @shake128_absorb(ptr noundef %0, ptr noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(200) %0, i8 0, i64 200, i1 false), !tbaa !5
  tail call void @keccak_absorb(ptr noundef %0, i32 noundef 168, ptr noundef %1, i64 noundef %2, i8 noundef zeroext 31)
  ret void
}

; Function Attrs: nounwind uwtable
declare hidden void @keccak_absorb(ptr noundef, i32 noundef, ptr noundef, i64 noundef, i8 noundef zeroext) local_unnamed_addr #0

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

!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"}


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