llvm-6502/lib/Target/Blackfin/BlackfinIntrinsicInfo.cpp
Bob Wilson 35ee7d6e04 Check if function names start with "llvm." before trying to lookup them up as
intrinsics.  The intrinsic lookup code assumes that this check has been done
and assumes the names are at least 6 characters long.  Valgrind complained
about this.  pr6638.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98831 91177308-0d34-0410-b5e6-96231b3b80d8
2010-03-18 16:52:15 +00:00

105 lines
3.2 KiB
C++

//===- BlackfinIntrinsicInfo.cpp - Intrinsic Information --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the Blackfin implementation of TargetIntrinsicInfo.
//
//===----------------------------------------------------------------------===//
#include "BlackfinIntrinsicInfo.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Function.h"
#include "llvm/Intrinsics.h"
#include "llvm/Module.h"
#include "llvm/Type.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
using namespace llvm;
namespace bfinIntrinsic {
enum ID {
last_non_bfin_intrinsic = Intrinsic::num_intrinsics-1,
#define GET_INTRINSIC_ENUM_VALUES
#include "BlackfinGenIntrinsics.inc"
#undef GET_INTRINSIC_ENUM_VALUES
, num_bfin_intrinsics
};
}
std::string BlackfinIntrinsicInfo::getName(unsigned IntrID, const Type **Tys,
unsigned numTys) const {
static const char *const names[] = {
#define GET_INTRINSIC_NAME_TABLE
#include "BlackfinGenIntrinsics.inc"
#undef GET_INTRINSIC_NAME_TABLE
};
assert(!isOverloaded(IntrID) && "Blackfin intrinsics are not overloaded");
if (IntrID < Intrinsic::num_intrinsics)
return 0;
assert(IntrID < bfinIntrinsic::num_bfin_intrinsics && "Invalid intrinsic ID");
std::string Result(names[IntrID - Intrinsic::num_intrinsics]);
return Result;
}
unsigned
BlackfinIntrinsicInfo::lookupName(const char *Name, unsigned Len) const {
if (Len < 5 || Name[4] != '.' || Name[0] != 'l' || Name[1] != 'l'
|| Name[2] != 'v' || Name[3] != 'm')
return 0; // All intrinsics start with 'llvm.'
#define GET_FUNCTION_RECOGNIZER
#include "BlackfinGenIntrinsics.inc"
#undef GET_FUNCTION_RECOGNIZER
return 0;
}
bool BlackfinIntrinsicInfo::isOverloaded(unsigned IntrID) const {
// Overload Table
const bool OTable[] = {
#define GET_INTRINSIC_OVERLOAD_TABLE
#include "BlackfinGenIntrinsics.inc"
#undef GET_INTRINSIC_OVERLOAD_TABLE
};
if (IntrID == 0)
return false;
else
return OTable[IntrID - Intrinsic::num_intrinsics];
}
/// This defines the "getAttributes(ID id)" method.
#define GET_INTRINSIC_ATTRIBUTES
#include "BlackfinGenIntrinsics.inc"
#undef GET_INTRINSIC_ATTRIBUTES
static const FunctionType *getType(LLVMContext &Context, unsigned id) {
const Type *ResultTy = NULL;
std::vector<const Type*> ArgTys;
bool IsVarArg = false;
#define GET_INTRINSIC_GENERATOR
#include "BlackfinGenIntrinsics.inc"
#undef GET_INTRINSIC_GENERATOR
return FunctionType::get(ResultTy, ArgTys, IsVarArg);
}
Function *BlackfinIntrinsicInfo::getDeclaration(Module *M, unsigned IntrID,
const Type **Tys,
unsigned numTy) const {
assert(!isOverloaded(IntrID) && "Blackfin intrinsics are not overloaded");
AttrListPtr AList = getAttributes((bfinIntrinsic::ID) IntrID);
return cast<Function>(M->getOrInsertFunction(getName(IntrID),
getType(M->getContext(), IntrID),
AList));
}