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/*========================== begin_copyright_notice ============================
Copyright (C) 2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
//
/// GenXTranslateSPIRVBuiltins
/// -----------
///
/// This pass translates SPIR-V builtin functions by linking with BiF module.
/// BiF module holds implementation of those builtin functions.
///
//===----------------------------------------------------------------------===//
#include "vc/GenXOpts/GenXOpts.h"
#include "vc/Support/BackendConfig.h"
#include "vc/Utils/General/BiF.h"
#include "Probe/Assertion.h"
#include <llvm/IR/Function.h>
#include <llvm/IR/Module.h>
#include <llvm/Linker/Linker.h>
#include <llvm/Pass.h>
#include <llvm/GenXIntrinsics/GenXIntrinsics.h>
using namespace llvm;
class GenXTranslateSPIRVBuiltins final : public ModulePass {
public:
static char ID;
GenXTranslateSPIRVBuiltins() : ModulePass(ID) {}
StringRef getPassName() const override {
return "GenX translate SPIR-V builtins";
}
void getAnalysisUsage(AnalysisUsage &AU) const override;
bool runOnModule(Module &M) override;
private:
std::unique_ptr<Module> getBiFModule(BiFKind Kind, LLVMContext &Ctx);
};
char GenXTranslateSPIRVBuiltins::ID = 0;
INITIALIZE_PASS_BEGIN(GenXTranslateSPIRVBuiltins, "GenXTranslateSPIRVBuiltins",
"GenXTranslateSPIRVBuiltins", false, false)
INITIALIZE_PASS_DEPENDENCY(GenXBackendConfig)
INITIALIZE_PASS_END(GenXTranslateSPIRVBuiltins, "GenXTranslateSPIRVBuiltins",
"GenXTranslateSPIRVBuiltins", false, false)
ModulePass *llvm::createGenXTranslateSPIRVBuiltinsPass() {
initializeGenXTranslateSPIRVBuiltinsPass(*PassRegistry::getPassRegistry());
return new GenXTranslateSPIRVBuiltins;
}
void GenXTranslateSPIRVBuiltins::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<GenXBackendConfig>();
}
// May have false positive, e.g. __spirv is in the middle of a function name.
// Having false positives is not that critical as they won't be linked anyway.
static bool isSPIRVBuiltinDecl(const Function &F) {
if (!F.isDeclaration())
return false;
if (F.isIntrinsic() || GenXIntrinsic::isGenXIntrinsic(&F))
return false;
return F.getName().contains("__spirv");
}
bool GenXTranslateSPIRVBuiltins::runOnModule(Module &M) {
// Collect SPIRV built-in functions to link.
auto SPIRVBuiltins = vc::collectFunctionNamesIf(
M, [](const Function &F) { return isSPIRVBuiltinDecl(F); });
// Nothing to do if there are no spirv builtins.
if (SPIRVBuiltins.empty())
return false;
std::unique_ptr<Module> SPIRVBuiltinsModule =
getBiFModule(BiFKind::VCSPIRVBuiltins, M.getContext());
SPIRVBuiltinsModule->setDataLayout(M.getDataLayout());
SPIRVBuiltinsModule->setTargetTriple(M.getTargetTriple());
if (Linker::linkModules(M, std::move(SPIRVBuiltinsModule),
Linker::Flags::LinkOnlyNeeded)) {
IGC_ASSERT_MESSAGE(0, "Error linking spirv implementation builtin module");
}
// If declaration appeared, then mark with internal linkage.
vc::internalizeImportedFunctions(M, SPIRVBuiltins,
/* SetAlwaysInline */ true);
return true;
}
std::unique_ptr<Module>
GenXTranslateSPIRVBuiltins::getBiFModule(BiFKind Kind, LLVMContext &Ctx) {
MemoryBufferRef BiFModuleBuffer =
getAnalysis<GenXBackendConfig>().getBiFModule(Kind);
return vc::getLazyBiFModuleOrReportError(BiFModuleBuffer, Ctx);
}
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