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Remove redundant copying of std::vectors

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Usage of initializer list in for loop to iterate over heavy types
has bad consequences. std::initialize_list is only a view and its
data is silently created as T[N]. Therefore, if someone uses
std::vector with it, it will cause deep-copying of the elements.

This change introduces usage of pointers on std::initializer_list
to perform a shallow-copy of an addresses. Furthermore, it adds
const references in few places, where copy is not needed.

Signed-off-by: Patryk Wrobel <patryk.wrobel@intel.com>
This commit is contained in:
Patryk Wrobel
2022-08-12 16:57:46 +00:00
committed by Compute-Runtime-Automation
parent 3778a371fd
commit 44e1f1ba4b
6 changed files with 23 additions and 22 deletions
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2
shared/offline_compiler/source/ocloc_arg_helper.cpp
View File

@@ -161,7 +161,7 @@ bool OclocArgHelper::getHwInfoForProductConfig(uint32_t productConfig, NEO::Hard
return retVal;
}
auto deviceAotMap = productConfigHelper->getDeviceAotInfo();
const auto &deviceAotMap = productConfigHelper->getDeviceAotInfo();
for (auto &deviceConfig : deviceAotMap) {
if (deviceConfig.aotConfig.ProductConfig == productConfig) {
hwInfo = *deviceConfig.hwInfo;

12
shared/offline_compiler/source/ocloc_arg_helper.h
View File

@@ -110,10 +110,10 @@ class OclocArgHelper {
}
template <typename... Args>
static auto getArgsWithoutDuplicate(Args... args) {
static auto getArgsWithoutDuplicate(const Args &...args) {
std::vector<NEO::ConstStringRef> out{};
for (const auto &acronyms : {args...}) {
for (const auto &acronym : acronyms) {
for (const auto *acronyms : {std::addressof(args)...}) {
for (const auto &acronym : *acronyms) {
if (!std::any_of(out.begin(), out.end(), findDuplicate(acronym))) {
out.push_back(acronym);
}
@@ -123,10 +123,10 @@ class OclocArgHelper {
}
template <typename... Args>
static auto createStringForArgs(Args... args) {
static auto createStringForArgs(const Args &...args) {
std::ostringstream os;
for (const auto &acronyms : {args...}) {
for (const auto &acronym : acronyms) {
for (const auto *acronyms : {std::addressof(args)...}) {
for (const auto &acronym : *acronyms) {
if (os.tellp())
os << ", ";
os << acronym.str();