TestPrintDefUse.cpp
2.7 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
//===- TestPrintDefUse.cpp - Passes to illustrate the IR def-use chains ---===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/StandardOps/IR/Ops.h"
#include "mlir/IR/Function.h"
#include "mlir/Pass/Pass.h"
using namespace mlir;
namespace {
/// This pass illustrates the IR def-use chains through printing.
struct TestPrintDefUsePass
: public PassWrapper<TestPrintDefUsePass, OperationPass<>> {
void runOnOperation() override {
// Recursively traverse the IR nested under the current operation and print
// every single operation and their operands and users.
getOperation()->walk([](Operation *op) {
llvm::outs() << "Visiting op '" << op->getName() << "' with "
<< op->getNumOperands() << " operands:\n";
// Print information about the producer of each of the operands.
for (Value operand : op->getOperands()) {
if (Operation *producer = operand.getDefiningOp()) {
llvm::outs() << " - Operand produced by operation '"
<< producer->getName() << "'\n";
} else {
// If there is no defining op, the Value is necessarily a Block
// argument.
auto blockArg = operand.cast<BlockArgument>();
llvm::outs() << " - Operand produced by Block argument, number "
<< blockArg.getArgNumber() << "\n";
}
}
// Print information about the user of each of the result.
llvm::outs() << "Has " << op->getNumResults() << " results:\n";
for (auto indexedResult : llvm::enumerate(op->getResults())) {
Value result = indexedResult.value();
llvm::outs() << " - Result " << indexedResult.index();
if (result.use_empty()) {
llvm::outs() << " has no uses\n";
continue;
}
if (result.hasOneUse()) {
llvm::outs() << " has a single use: ";
} else {
llvm::outs() << " has "
<< std::distance(result.getUses().begin(),
result.getUses().end())
<< " uses:\n";
}
for (Operation *userOp : result.getUsers()) {
llvm::outs() << " - " << userOp->getName() << "\n";
}
}
});
}
};
} // end anonymous namespace
namespace mlir {
void registerTestPrintDefUsePass() {
PassRegistration<TestPrintDefUsePass>("test-print-defuse",
"Test various printing.");
}
} // namespace mlir