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/*========================== begin_copyright_notice ============================
Copyright (C) 2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "ConvertUserSemanticDecoratorOnFunctions.h"
#include "Compiler/IGCPassSupport.h"
#include "common/LLVMWarningsPush.hpp"
#include "llvmWrapper/IR/DerivedTypes.h"
#include "llvmWrapper/IR/Instructions.h"
#include <llvm/IR/Module.h>
#include <llvm/IR/Function.h>
#include <llvm/IR/Instructions.h>
#include <llvm/Demangle/Demangle.h>
#include <llvm/IR/Mangler.h>
#include "common/LLVMWarningsPop.hpp"
using namespace llvm;
using namespace IGC;
// Register pass to igc-opt
#define PASS_FLAG "igc-convert-user-semantic-decorator-on-functions"
#define PASS_DESCRIPTION "Convert user semantic decorator on functions"
#define PASS_CFG_ONLY false
#define PASS_ANALYSIS false
IGC_INITIALIZE_PASS_BEGIN(ConvertUserSemanticDecoratorOnFunctions, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY,
PASS_ANALYSIS)
IGC_INITIALIZE_PASS_END(ConvertUserSemanticDecoratorOnFunctions, PASS_FLAG, PASS_DESCRIPTION, PASS_CFG_ONLY,
PASS_ANALYSIS)
char ConvertUserSemanticDecoratorOnFunctions::ID = 0;
ConvertUserSemanticDecoratorOnFunctions::ConvertUserSemanticDecoratorOnFunctions() : ModulePass(ID) {
initializeConvertUserSemanticDecoratorOnFunctionsPass(*PassRegistry::getPassRegistry());
}
// Some of the metadata may disappear when linking LLVM modules; attributes are much more permament.
static void convertAnnotationsToAttributes(llvm::Function *function, const std::vector<std::string> &annotations) {
for (const auto &annotation : annotations) {
if (annotation == "igc-force-stackcall") {
function->addFnAttr("igc-force-stackcall");
} else if (annotation == "sycl-unmasked") {
function->addFnAttr("sycl-unmasked");
} else if (annotation.rfind("num-thread-per-eu", 0) == 0) {
std::string numThreadPerEU = annotation;
numThreadPerEU.erase(0, sizeof("num-thread-per-eu") - 1);
// Remove whitespaces - if they are present
numThreadPerEU.erase(std::remove_if(numThreadPerEU.begin(), numThreadPerEU.end(), ::isspace),
numThreadPerEU.end());
function->addFnAttr("num-thread-per-eu", numThreadPerEU == "auto" ? "0" : std::move(numThreadPerEU));
}
}
}
bool ConvertUserSemanticDecoratorOnFunctions::runOnModule(Module &M) {
auto MD = getAnalysis<MetaDataUtilsWrapper>().getModuleMetaData();
auto annotations_gv = M.getGlobalVariable("llvm.global.annotations");
if (!annotations_gv) {
return false;
}
//
// GlobalVariable("llvm.global.annotations"):
// ConstantArray:
// ConstantStruct:
// BitCastOperator:
// Function = [ANNOTATED_FUNCTION]
// GetElementPtr:
// GlobalVariable = [ANNOTATION]
// ConstantStruct:
// ...
//
auto annotations_array = cast<ConstantArray>(annotations_gv->getOperand(0));
for (const auto &op : annotations_array->operands()) {
auto annotation_struct = cast<ConstantStruct>(op.get());
auto annotated_function = cast<Function>(annotation_struct->getOperand(0)->getOperand(0));
auto annotation_gv = cast<GlobalVariable>(annotation_struct->getOperand(1)->getOperand(0));
auto annotation = cast<ConstantDataArray>(annotation_gv->getInitializer())->getAsCString();
auto &funcInfo = MD->FuncMD[annotated_function];
funcInfo.UserAnnotations.emplace_back(annotation.data());
convertAnnotationsToAttributes(annotated_function, funcInfo.UserAnnotations);
}
IGC::serialize(*MD, &M);
return true;
}
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