; LLVM IR from cryspen/libcrux :: sys/hacl/c/src (Lib_RandomBuffer_System)

; 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"

@.str = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @read_random_bytes(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %9 = call i32 (ptr, i32, ...) @open(ptr noundef @.str, i32 noundef 0)
  store i32 %9, ptr %6, align 4, !tbaa !5
  %10 = load i32, ptr %6, align 4, !tbaa !5
  %11 = icmp eq i32 %10, -1
  br i1 %11, label %12, label %13

12:                                               ; preds = %2
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %25

13:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load ptr, ptr %5, align 8, !tbaa !9
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = zext i32 %16 to i64
  %18 = call i64 @read(i32 noundef %14, ptr noundef %15, i64 noundef %17)
  store i64 %18, ptr %8, align 8, !tbaa !11
  %19 = load i32, ptr %6, align 4, !tbaa !5
  %20 = call i32 @close(i32 noundef %19)
  %21 = load i64, ptr %8, align 8, !tbaa !11
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = zext i32 %22 to i64
  %24 = icmp eq i64 %21, %23
  store i1 %24, ptr %3, align 1
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %25

25:                                               ; preds = %13, %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %26 = load i1, ptr %3, align 1
  ret i1 %26
}

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

declare i32 @open(ptr noundef, i32 noundef, ...) #2

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

declare i32 @close(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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}


; 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"

@.str = external hidden unnamed_addr constant [13 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef zeroext i1 @read_random_bytes(i32 noundef %0, ptr nocapture noundef %1) local_unnamed_addr #0 {
  %3 = tail call i32 (ptr, i32, ...) @open(ptr noundef nonnull @.str, i32 noundef 0) #3
  %4 = icmp eq i32 %3, -1
  br i1 %4, label %10, label %5

5:                                                ; preds = %2
  %6 = zext i32 %0 to i64
  %7 = tail call i64 @read(i32 noundef %3, ptr noundef %1, i64 noundef %6) #3
  %8 = tail call i32 @close(i32 noundef %3) #3
  %9 = icmp eq i64 %7, %6
  br label %10

10:                                               ; preds = %2, %5
  %.0 = phi i1 [ %9, %5 ], [ false, %2 ]
  ret i1 %.0
}

; Function Attrs: nofree
declare noundef i32 @open(ptr nocapture noundef readonly, i32 noundef, ...) local_unnamed_addr #1

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #1

declare i32 @close(i32 noundef) local_unnamed_addr #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 = { nofree "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 = { "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)"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass