1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184
|
//===-- gen_gccbuiltins.cpp - GCC builtin module generator ----------------===//
//
// LDC – the LLVM D compiler
//
// This file is distributed under the BSD-style LDC license. See the LICENSE
// file for details.
//
//===----------------------------------------------------------------------===//
//
// This tool reads the GCC builtin definitions from LLVM's Intrinsics.td for
// a given architecture and accordingly generates a ldc.gccbuiltins_<arch>
// module for using them from D code.
//
//===----------------------------------------------------------------------===//
#include "llvm/TableGen/Main.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Path.h"
#include "llvm/TableGen/Record.h"
#include <algorithm>
#include <assert.h>
#include <map>
#include <stdio.h>
#include <string.h>
#include <string>
using namespace std;
using namespace llvm;
string dtype(Record* rec, bool readOnlyMem)
{
Init* typeInit = rec->getValueInit("VT");
if(!typeInit)
return "";
string type = typeInit->getAsString();
if(type == "iPTR")
return readOnlyMem ? "const void*" : "void*";
string vec = "";
if(type[0] == 'v')
{
size_t i = 1;
while(i != type.size() && type[i] <= '9' && type[i] >= '0')
i++;
vec = type.substr(1, i - 1);
type = type.substr(i);
}
if(type == "i1" && vec.empty())
return "bool";
else if(type == "i8")
return "byte" + vec;
else if(type == "i16")
return "short" + vec;
else if(type == "i32")
return "int" + vec;
else if(type == "i64")
return "long" + vec;
else if(type == "f32")
return "float" + vec;
else if(type == "f64")
return "double" + vec;
else
return "";
}
StringRef attributes(ListInit* propertyList)
{
const auto prop = propertyList->size()
? propertyList->getElementAsRecord(0)->getName()
: "";
if (prop == "IntrNoMem")
return " pure @safe";
if (prop == "IntrReadArgMem" || prop == "IntrReadWriteArgMem")
return " pure";
return "";
}
void processRecord(raw_ostream& os, Record& rec, string arch)
{
if(!rec.getValue("GCCBuiltinName"))
return;
const StringRef builtinName = rec.getValueAsString("GCCBuiltinName");
string name = rec.getName().str();
if(name.substr(0, 4) != "int_" || name.find(arch) == string::npos)
return;
name = name.substr(4);
replace(name.begin(), name.end(), '_', '.');
name = string("llvm.") + name;
ListInit* propsList = rec.getValueAsListInit("IntrProperties");
const StringRef prop =
propsList->size() ? propsList->getElementAsRecord(0)->getName() : "";
bool readOnlyMem = prop == "IntrReadArgMem" || prop == "IntrReadMem";
ListInit* paramsList = rec.getValueAsListInit("ParamTypes");
vector<string> params;
for(unsigned int i = 0; i < paramsList->size(); i++)
{
string t = dtype(paramsList->getElementAsRecord(i), readOnlyMem);
if(t == "")
return;
params.push_back(t);
}
ListInit* retList = rec.getValueAsListInit("RetTypes");
string ret;
size_t sz = retList->size();
if(sz == 0)
ret = "void";
else if(sz == 1)
{
ret = dtype(retList->getElementAsRecord(0), false);
if(ret == "")
return;
}
else
return;
os << "pragma(LDC_intrinsic, \"" << name << "\")\n ";
os << ret << " " << builtinName << "(";
if(params.size())
os << params[0];
for(size_t i = 1; i < params.size(); i++)
os << ", " << params[i];
os << ")" << attributes(propsList) << ";\n\n";
}
std::string arch;
bool emit(raw_ostream& os, RecordKeeper& records)
{
os << "module ldc.gccbuiltins_";
os << arch;
os << "; \n\nimport core.simd;\n\nnothrow @nogc:\n\n";
const auto &defs = records.getDefs();
for (const auto& d : defs)
processRecord(os, *d.second, arch);
return false;
}
int main(int argc, char** argv)
{
if(argc != 3)
{
fprintf(stderr, "There must be exactly two command line arguments\n");
return 1;
}
llvm::SmallString<128> file(LLVM_INTRINSIC_TD_PATH);
sys::path::append(file, "llvm");
sys::path::append(file, "IR");
sys::path::append(file, "Intrinsics.td");
string iStr = string("-I=") + LLVM_INTRINSIC_TD_PATH;
string oStr = string("-o=") + argv[1];
vector<char*> args2(argv, argv + 1);
args2.push_back(const_cast<char*>(file.c_str()));
args2.push_back(const_cast<char*>(iStr.c_str()));
args2.push_back(const_cast<char*>(oStr.c_str()));
cl::ParseCommandLineOptions(args2.size(), &args2[0]);
arch = argv[2];
return TableGenMain(argv[0], emit);
}
|