| /* |
| * Copyright 2010-2012, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "bcc/Script.h" |
| |
| #include "Assert.h" |
| #include "Log.h" |
| |
| #include "bcc/CompilerConfig.h" |
| #include "bcc/Source.h" |
| |
| #include "bcinfo/MetadataExtractor.h" |
| |
| #include <llvm/IR/Module.h> |
| |
| using namespace bcc; |
| |
| Script::Script(Source *pSource) |
| : mSource(pSource), |
| mOptimizationLevel(llvm::CodeGenOpt::Aggressive), |
| mLinkRuntimeCallback(nullptr), mEmbedInfo(false), mEmbedGlobalInfo(false), |
| mEmbedGlobalInfoSkipConstant(false) {} |
| |
| bool Script::LinkRuntime(const char *core_lib) { |
| bccAssert(core_lib != nullptr); |
| |
| // Using the same context with the source. |
| BCCContext &context = mSource->getContext(); |
| |
| Source *libclcore_source = Source::CreateFromFile(context, core_lib); |
| if (libclcore_source == nullptr) { |
| ALOGE("Failed to load Renderscript library '%s' to link!", core_lib); |
| return false; |
| } |
| |
| if (mLinkRuntimeCallback != nullptr) { |
| mLinkRuntimeCallback(this, &mSource->getModule(), |
| &libclcore_source->getModule()); |
| } |
| |
| // For every named metadata node in the source (libclcore_source), |
| // the merge process ensures there is a same-named metadata node in |
| // the destination (mSource) (creating it if necessary) and appends |
| // all of the source node's operands to the end of the destination |
| // node's operands. In the case of the wrapper metadata |
| // |
| // kWrapperMetadataName -> (compilerVersion, optimizationLevel) |
| // |
| // this is not the behavior we want. Instead, we want to retain the |
| // source wrapper metadata: |
| // - compiler version in libclcore_source is 0, a nonsensical value. |
| // As documented in slang_version.h, libclcore_source must not |
| // violate any compiler version guarantees, so the right thing to |
| // do is retain the compiler version from source, which specifies |
| // which guarantees source (and hence the merged code) satisfies. |
| // See frameworks/rs/driver/README.txt regarding libclcore_source |
| // obeying compiler version guarantees. |
| // - optimization level in source and libclcore_source is meaningful. |
| // We simply define the optimization level in the linked code to |
| // be the optimization level of source. |
| // The easiest way to retain the source wrapper metadata is to delete |
| // the libclcore_source wrapper metadata. |
| llvm::Module &libclcore_module = libclcore_source->getModule(); |
| llvm::NamedMDNode *const wrapperMDNode = |
| libclcore_module.getNamedMetadata(bcinfo::MetadataExtractor::kWrapperMetadataName); |
| bccAssert(wrapperMDNode != nullptr); |
| libclcore_module.eraseNamedMetadata(wrapperMDNode); |
| if (!mSource->merge(*libclcore_source)) { |
| ALOGE("Failed to link Renderscript library '%s'!", core_lib); |
| delete libclcore_source; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool Script::mergeSource(Source &pSource) { return mSource->merge(pSource); } |