; LLVM IR from cryspen/libcrux :: sys/libjade/jazz/randombytes.ll_ (jasmin_syscall_randombytes__)

; 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: nounwind uwtable
define dso_local ptr @__jasmin_syscall_randombytes__(ptr noundef %0, i64 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  store ptr %7, ptr %6, align 8, !tbaa !5
  br label %8

8:                                                ; preds = %28, %26, %2
  %9 = load i64, ptr %4, align 8, !tbaa !9
  %10 = icmp ugt i64 %9, 0
  br i1 %10, label %11, label %37

11:                                               ; preds = %8
  %12 = load i64, ptr %4, align 8, !tbaa !9
  %13 = icmp ult i64 %12, 1048576
  br i1 %13, label %14, label %17

14:                                               ; preds = %11
  %15 = load i64, ptr %4, align 8, !tbaa !9
  %16 = trunc i64 %15 to i32
  store i32 %16, ptr %5, align 4, !tbaa !11
  br label %18

17:                                               ; preds = %11
  store i32 1048576, ptr %5, align 4, !tbaa !11
  br label %18

18:                                               ; preds = %17, %14
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load i32, ptr %5, align 4, !tbaa !11
  %21 = sext i32 %20 to i64
  %22 = call i64 @getrandom(ptr noundef %19, i64 noundef %21, i32 noundef 0)
  %23 = trunc i64 %22 to i32
  store i32 %23, ptr %5, align 4, !tbaa !11
  %24 = load i32, ptr %5, align 4, !tbaa !11
  %25 = icmp slt i32 %24, 1
  br i1 %25, label %26, label %28

26:                                               ; preds = %18
  %27 = call i32 @sleep(i32 noundef 1)
  br label %8, !llvm.loop !13

28:                                               ; preds = %18
  %29 = load i32, ptr %5, align 4, !tbaa !11
  %30 = load ptr, ptr %6, align 8, !tbaa !5
  %31 = sext i32 %29 to i64
  %32 = getelementptr inbounds i8, ptr %30, i64 %31
  store ptr %32, ptr %6, align 8, !tbaa !5
  %33 = load i32, ptr %5, align 4, !tbaa !11
  %34 = sext i32 %33 to i64
  %35 = load i64, ptr %4, align 8, !tbaa !9
  %36 = sub i64 %35, %34
  store i64 %36, ptr %4, align 8, !tbaa !9
  br label %8, !llvm.loop !13

37:                                               ; preds = %8
  %38 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret ptr %38
}

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

declare i64 @getrandom(ptr noundef, i64 noundef, i32 noundef) #2

declare i32 @sleep(i32 noundef) #2

; 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 = { "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 #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 = !{!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 noundef ptr @__jasmin_syscall_randombytes__(ptr noundef returned %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not15 = icmp eq i64 %1, 0
  br i1 %.not15, label %.outer._crit_edge, label %.lr.ph.split

.lr.ph.split:                                     ; preds = %2, %.outer
  %.0.ph17 = phi ptr [ %11, %.outer ], [ %0, %2 ]
  %.012.ph16 = phi i64 [ %12, %.outer ], [ %1, %2 ]
  %.012. = tail call i64 @llvm.umin.i64(i64 %.012.ph16, i64 1048576)
  %3 = tail call i64 @getrandom(ptr noundef %.0.ph17, i64 noundef %.012., i32 noundef 0) #3
  %4 = trunc i64 %3 to i32
  %5 = icmp slt i32 %4, 1
  br i1 %5, label %.lr.ph14, label %.outer

.lr.ph14:                                         ; preds = %.lr.ph.split, %.lr.ph14
  %6 = tail call i32 @sleep(i32 noundef 1) #3
  %7 = tail call i64 @getrandom(ptr noundef %.0.ph17, i64 noundef %.012., i32 noundef 0) #3
  %8 = trunc i64 %7 to i32
  %9 = icmp slt i32 %8, 1
  br i1 %9, label %.lr.ph14, label %.outer

.outer:                                           ; preds = %.lr.ph14, %.lr.ph.split
  %.us-phi = phi i64 [ %3, %.lr.ph.split ], [ %7, %.lr.ph14 ]
  %10 = and i64 %.us-phi, 2147483647
  %11 = getelementptr inbounds i8, ptr %.0.ph17, i64 %10
  %12 = sub i64 %.012.ph16, %10
  %.not = icmp eq i64 %12, 0
  br i1 %.not, label %.outer._crit_edge, label %.lr.ph.split, !llvm.loop !5

.outer._crit_edge:                                ; preds = %.outer, %2
  ret ptr %0
}

declare i64 @getrandom(ptr noundef, i64 noundef, i32 noundef) local_unnamed_addr #1

declare i32 @sleep(i32 noundef) local_unnamed_addr #1

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #2

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 = { "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 nosync nounwind speculatable willreturn memory(none) }
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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass