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//===- OpStats.cpp - Prints stats of operations in module -----------------===//
//
// Copyright 2019 The MLIR Authors.
//
// 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 "mlir/IR/Function.h"
#include "mlir/IR/OperationSupport.h"
#include "mlir/IR/Statements.h"
#include "mlir/IR/StmtVisitor.h"
#include "mlir/Pass.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/raw_ostream.h"
using namespace mlir;
namespace {
struct PrintOpStatsPass : public FunctionPass, StmtWalker<PrintOpStatsPass> {
explicit PrintOpStatsPass(llvm::raw_ostream &os = llvm::errs())
: FunctionPass(&PrintOpStatsPass::passID), os(os) {}
// Prints the resultant operation stats post iterating over the module.
PassResult runOnModule(Module *m) override;
// Process CFG function considering the instructions in basic blocks.
PassResult runOnCFGFunction(Function *function) override;
// Process ML functions and operation statments in ML functions.
PassResult runOnMLFunction(Function *function) override;
void visitOperationInst(OperationInst *stmt);
// Print summary of op stats.
void printSummary();
static char passID;
private:
llvm::StringMap<int64_t> opCount;
llvm::raw_ostream &os;
};
} // namespace
char PrintOpStatsPass::passID = 0;
PassResult PrintOpStatsPass::runOnModule(Module *m) {
auto result = FunctionPass::runOnModule(m);
if (!result)
printSummary();
return result;
}
PassResult PrintOpStatsPass::runOnCFGFunction(Function *function) {
for (const auto &bb : *function)
for (const auto &inst : bb)
if (auto *op = dyn_cast<OperationInst>(&inst))
++opCount[op->getName().getStringRef()];
return success();
}
void PrintOpStatsPass::visitOperationInst(OperationInst *stmt) {
++opCount[stmt->getName().getStringRef()];
}
PassResult PrintOpStatsPass::runOnMLFunction(Function *function) {
walk(function);
return success();
}
void PrintOpStatsPass::printSummary() {
os << "Operations encountered:\n";
os << "-----------------------\n";
std::vector<StringRef> sorted(opCount.keys().begin(), opCount.keys().end());
llvm::sort(sorted);
// Returns the lenght of the dialect prefix of an op.
auto dialectLen = [](StringRef opName) -> size_t {
auto dialectEnd = opName.find_last_of('.');
if (dialectEnd == StringRef::npos)
return 0;
// Count the period too.
return dialectEnd + 1;
};
// Left-align the names (aligning on the dialect) and right-align count below.
// The alignment is for readability and does not affect CSV/FileCheck parsing.
size_t maxLenName = 0;
size_t maxLenNamePrefixLen = 0;
size_t maxLenDialect = 0;
int maxLenCount = 0;
for (const auto &key : sorted) {
size_t len = key.size();
size_t prefix = dialectLen(key);
if (len > maxLenName) {
maxLenName = len;
maxLenNamePrefixLen = prefix;
}
maxLenDialect = max(maxLenDialect, prefix);
// This takes advantage of the fact that opCount[key] > 0.
maxLenCount = max(maxLenCount, (int)log10(opCount[key]) + 1);
}
// Adjust the max name length to account for the dialect.
maxLenName += (maxLenDialect - maxLenNamePrefixLen);
for (const auto &key : sorted) {
size_t prefix = maxLenDialect - dialectLen(key);
os.indent(2 + prefix) << '\'' << key << '\'';
// Add one to compensate for the period of the dialect.
os.indent(maxLenName + 1 - key.size() - prefix) << " ,";
os.indent(maxLenCount - (int)log10(opCount[key])) << opCount[key] << "\n";
}
}
static PassRegistration<PrintOpStatsPass>
pass("print-op-stats", "Print statistics of operations");
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