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