; LLVM IR from microsoft/ntttcp-for-linux :: src (util)

; 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: 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) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @escape_char_for_json(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i64, 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 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !11
  store i64 0, ptr %6, align 8, !tbaa !11
  br label %8

8:                                                ; preds = %34, %2
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !11
  %11 = getelementptr inbounds i8, ptr %9, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !13
  %13 = icmp ne i8 %12, 0
  br i1 %13, label %14, label %37

14:                                               ; preds = %8
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = add i32 %15, 1
  store i32 %16, ptr %5, align 4, !tbaa !9
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i64, ptr %6, align 8, !tbaa !11
  %19 = getelementptr inbounds i8, ptr %17, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !13
  %21 = sext i8 %20 to i32
  switch i32 %21, label %22 [
    i32 10, label %33
  ]

22:                                               ; preds = %14
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = add i32 %23, -1
  store i32 %24, ptr %5, align 4, !tbaa !9
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %7, align 8, !tbaa !11
  %27 = getelementptr inbounds i8, ptr %25, i64 %26
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = load i64, ptr %6, align 8, !tbaa !11
  %30 = getelementptr inbounds i8, ptr %28, i64 %29
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %27, ptr align 1 %30, i64 1, i1 false)
  %31 = load i64, ptr %7, align 8, !tbaa !11
  %32 = add i64 %31, 1
  store i64 %32, ptr %7, align 8, !tbaa !11
  br label %33

33:                                               ; preds = %22, %14
  br label %34

34:                                               ; preds = %33
  %35 = load i64, ptr %6, align 8, !tbaa !11
  %36 = add i64 %35, 1
  store i64 %36, ptr %6, align 8, !tbaa !11
  br label %8, !llvm.loop !14

37:                                               ; preds = %8
  %38 = load i32, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %38
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local i32 @escape_char_for_json(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = load i8, ptr %0, align 1
  %.not16 = icmp eq i8 %3, 0
  br i1 %.not16, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2, %9
  %4 = phi i8 [ %12, %9 ], [ %3, %2 ]
  %.019 = phi i64 [ %.1, %9 ], [ 0, %2 ]
  %.01218 = phi i64 [ %10, %9 ], [ 0, %2 ]
  %.01317 = phi i32 [ %.114, %9 ], [ 0, %2 ]
  %5 = add i32 %.01317, 1
  %cond = icmp eq i8 %4, 10
  br i1 %cond, label %9, label %6

6:                                                ; preds = %.lr.ph
  %7 = getelementptr inbounds i8, ptr %1, i64 %.019
  store i8 %4, ptr %7, align 1
  %8 = add i64 %.019, 1
  br label %9

9:                                                ; preds = %6, %.lr.ph
  %.114 = phi i32 [ %5, %.lr.ph ], [ %.01317, %6 ]
  %.1 = phi i64 [ %.019, %.lr.ph ], [ %8, %6 ]
  %10 = add i64 %.01218, 1
  %11 = getelementptr inbounds i8, ptr %0, i64 %10
  %12 = load i8, ptr %11, align 1
  %.not = icmp eq i8 %12, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5

._crit_edge:                                      ; preds = %9, %2
  %.013.lcssa = phi i32 [ 0, %2 ], [ %.114, %9 ]
  ret i32 %.013.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: readwrite) 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" }

!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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass