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// Implementation of LLVMUtils, useful common LLVM-related functionality.
//
// Copyright (c) 2013 Pekka Jääskeläinen / TUT
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#include "LLVMUtils.h"
#include "config.h"
#ifdef LLVM_3_2
#include <llvm/Module.h>
#include <llvm/Metadata.h>
#else
#include <llvm/IR/Module.h>
#include <llvm/IR/Metadata.h>
#endif
using namespace llvm;
/**
* Regenerates the metadata that points to the original kernel
* (of which finger print was modified) to point to the new
* kernel.
*
* Only checks if the first operand of the metadata is the kernel
* function.
*/
void
regenerate_kernel_metadata(llvm::Module &M, FunctionMapping &kernels)
{
// reproduce the opencl.kernel_wg_size_info metadata
NamedMDNode *wg_sizes = M.getNamedMetadata("opencl.kernel_wg_size_info");
if (wg_sizes != NULL && wg_sizes->getNumOperands() > 0)
{
for (std::size_t mni = 0; mni < wg_sizes->getNumOperands(); ++mni)
{
MDNode *wgsizeMD = dyn_cast<MDNode>(wg_sizes->getOperand(mni));
for (FunctionMapping::const_iterator i = kernels.begin(),
e = kernels.end(); i != e; ++i)
{
Function *old_kernel = (*i).first;
Function *new_kernel = (*i).second;
if (old_kernel == new_kernel || wgsizeMD->getNumOperands() == 0 ||
dyn_cast<Function>(wgsizeMD->getOperand(0)) != old_kernel)
continue;
// found a wg size metadata that points to the old kernel, copy its
// operands except the first one to a new MDNode
SmallVector<Value*, 8> operands;
operands.push_back(new_kernel);
for (unsigned opr = 1; opr < wgsizeMD->getNumOperands(); ++opr)
{
operands.push_back(wgsizeMD->getOperand(opr));
}
MDNode *new_wg_md = MDNode::get(M.getContext(), operands);
wg_sizes->addOperand(new_wg_md);
}
}
}
// reproduce the opencl.kernels metadata
NamedMDNode *nmd = M.getNamedMetadata("opencl.kernels");
if (nmd)
M.eraseNamedMetadata(nmd);
nmd = M.getOrInsertNamedMetadata("opencl.kernels");
for (FunctionMapping::const_iterator i = kernels.begin(),
e = kernels.end();
i != e; ++i) {
MDNode *md = MDNode::get(M.getContext(), ArrayRef<Value *>((*i).second));
nmd->addOperand(md);
}
}
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