[BuildLibCalls] EmitStrNLen() is dead code. Garbage collect.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@253514 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Transforms/Utils/BuildLibCalls.cpp b/lib/Transforms/Utils/BuildLibCalls.cpp
index 8aa7b2a65ba9c0e80772e77ad39d186031aa3237..f5c992c805e1c280dbe0938ed2c8e936d4435ea2 100644 (file)
--- a/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -55,32 +55,6 @@ Value *llvm::EmitStrLen(Value *Ptr, IRBuilder<> &B, const DataLayout &DL,
   return CI;
 }
 
-/// EmitStrNLen - Emit a call to the strnlen function to the builder, for the
-/// specified pointer.  Ptr is required to be some pointer type, MaxLen must
-/// be of size_t type, and the return value has 'intptr_t' type.
-Value *llvm::EmitStrNLen(Value *Ptr, Value *MaxLen, IRBuilder<> &B,
-                         const DataLayout &DL, const TargetLibraryInfo *TLI) {
-  if (!TLI->has(LibFunc::strnlen))
-    return nullptr;
-
-  Module *M = B.GetInsertBlock()->getParent()->getParent();
-  AttributeSet AS[2];
-  AS[0] = AttributeSet::get(M->getContext(), 1, Attribute::NoCapture);
-  Attribute::AttrKind AVs[2] = { Attribute::ReadOnly, Attribute::NoUnwind };
-  AS[1] = AttributeSet::get(M->getContext(), AttributeSet::FunctionIndex, AVs);
-
-  LLVMContext &Context = B.GetInsertBlock()->getContext();
-  Constant *StrNLen =
-      M->getOrInsertFunction("strnlen", AttributeSet::get(M->getContext(), AS),
-                             DL.getIntPtrType(Context), B.getInt8PtrTy(),
-                             DL.getIntPtrType(Context), nullptr);
-  CallInst *CI = B.CreateCall(StrNLen, {CastToCStr(Ptr, B), MaxLen}, "strnlen");
-  if (const Function *F = dyn_cast<Function>(StrNLen->stripPointerCasts()))
-    CI->setCallingConv(F->getCallingConv());
-
-  return CI;
-}
-
 /// EmitStrChr - Emit a call to the strchr function to the builder, for the
 /// specified pointer and character.  Ptr is required to be some pointer type,
 /// and the return value has 'i8*' type.