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/*
* Copyright 2016 WebAssembly Community Group participants
*
* 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 <algorithm>
#include <iomanip>
#include <pass.h>
#include <support/colors.h>
#include <wasm.h>
#include <wasm-binary.h>
namespace wasm {
using namespace std;
// Prints metrics between optimization passes.
struct Metrics : public WalkerPass<PostWalker<Metrics, UnifiedExpressionVisitor<Metrics>>> {
bool byFunction;
Metrics(bool byFunction) : byFunction(byFunction) {}
static Metrics *lastMetricsPass;
map<const char *, int> counts;
void visitExpression(Expression* curr) {
auto name = getExpressionName(curr);
counts[name]++;
}
void doWalkModule(Module* module) {
// global things
for (auto& curr : module->functionTypes) {
visitFunctionType(curr.get());
}
for (auto& curr : module->imports) {
visitImport(curr.get());
}
for (auto& curr : module->exports) {
visitExport(curr.get());
}
for (auto& curr : module->globals) {
walkGlobal(curr.get());
}
walkTable(&module->table);
walkMemory(&module->memory);
// add functions
counts["[funcs]"] = module->functions.size();
// add memory and table
if (module->memory.exists) {
Index size = 0;
for (auto& segment: module->memory.segments) {
size += segment.data.size();
}
counts["[memory-data]"] = size;
}
if (module->table.exists) {
Index size = 0;
for (auto& segment: module->table.segments) {
size += segment.data.size();
}
counts["[table-data]"] = size;
}
if (byFunction) {
// print global
printCounts("global");
// compute binary info, so we know function sizes
BufferWithRandomAccess buffer;
WasmBinaryWriter writer(module, buffer);
writer.write();
// print for each function
for (Index i = 0; i < module->functions.size(); i++) {
auto* func = module->functions[i].get();
counts.clear();
walkFunction(func);
counts["[vars]"] = func->getNumVars();
counts["[binary-bytes]"] = writer.tableOfContents.functionBodies[i].size;
printCounts(std::string("func: ") + func->name.str);
}
// can't comapre detailed info between passes yet
lastMetricsPass = nullptr;
} else {
// add function info
size_t vars = 0;
for (auto& func : module->functions) {
walkFunction(func.get());
vars += func->getNumVars();
}
counts["[vars]"] = vars;
// print
printCounts("total");
// compare to next time
lastMetricsPass = this;
}
}
void printCounts(std::string title) {
ostream &o = cout;
vector<const char*> keys;
// add total
int total = 0;
for (auto i : counts) {
keys.push_back(i.first);
total += i.second;
}
keys.push_back("[total]");
counts["[total]"] = total;
// sort
sort(keys.begin(), keys.end(), [](const char* a, const char* b) -> bool {
return strcmp(b, a) > 0;
});
o << title << "\n";
for (auto* key : keys) {
auto value = counts[key];
o << " " << left << setw(15) << key << ": " << setw(8)
<< value;
if (lastMetricsPass) {
if (lastMetricsPass->counts.count(key)) {
int before = lastMetricsPass->counts[key];
int after = value;
if (after - before) {
if (after > before) {
Colors::red(o);
} else {
Colors::green(o);
}
o << right << setw(8);
o << showpos << after - before << noshowpos;
Colors::normal(o);
}
}
}
o << "\n";
}
}
};
Pass *createMetricsPass() {
return new Metrics(false);
}
Pass *createFunctionMetricsPass() {
return new Metrics(true);
}
Metrics *Metrics::lastMetricsPass;
} // namespace wasm
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