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//===--- CompilationGraph.cpp - The LLVM Compiler Driver --------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open
// Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Compilation graph - implementation.
//
//===----------------------------------------------------------------------===//
#include "CompilationGraph.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/ADT/STLExtras.h"
#include <stdexcept>
using namespace llvm;
extern cl::list<std::string> InputFilenames;
extern cl::opt<std::string> OutputFilename;
int llvmcc::CompilationGraph::Build (const sys::Path& tempDir) const {
sys::Path In(InputFilenames.at(0)), Out;
// Find out which language corresponds to the suffix of the first input file
LanguageMap::const_iterator Lang = ExtsToLangs.find(In.getSuffix());
if (Lang == ExtsToLangs.end())
throw std::runtime_error("Unknown suffix!");
// Find the toolchain corresponding to this language
ToolChainMap::const_iterator ToolsIt = ToolChains.find(Lang->second);
if (ToolsIt == ToolChains.end())
throw std::runtime_error("Unknown language!");
ToolChain Tools = ToolsIt->second;
PathVector JoinList;
for (cl::list<std::string>::const_iterator B = InputFilenames.begin(),
E = InputFilenames.end(); B != E; ++B) {
In = sys::Path(*B);
// Pass input file through the toolchain
for (ToolChain::const_iterator B = Tools.begin(), E = Tools.end();
B != E; ++B) {
const Tool* CurTool = B->getPtr();
// Is this the last step in the chain?
if (llvm::next(B) == E || CurTool->IsLast()) {
JoinList.push_back(In);
break;
}
else {
Out = tempDir;
Out.appendComponent(In.getBasename());
Out.appendSuffix(CurTool->OutputSuffix());
Out.makeUnique(true, NULL);
Out.eraseFromDisk();
}
if (CurTool->GenerateAction(In, Out).Execute() != 0)
throw std::runtime_error("Tool returned error code!");
In = Out; Out.clear();
}
}
// Pass .o files to linker
const Tool* JoinNode = (--Tools.end())->getPtr();
// If the final output name is empty, set it to "a.out"
if (!OutputFilename.empty()) {
Out = sys::Path(OutputFilename);
}
else {
Out = sys::Path("a");
Out.appendSuffix(JoinNode->OutputSuffix());
}
if (JoinNode->GenerateAction(JoinList, Out).Execute() != 0)
throw std::runtime_error("Tool returned error code!");
return 0;
}
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