mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
60 lines
2.0 KiB
C++
60 lines
2.0 KiB
C++
//===--- ConstantPropagation.cpp - Constant fold and diagnose overflows ---===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#define DEBUG_TYPE "constant-propagation"
|
|
#include "swift/Basic/Assertions.h"
|
|
#include "swift/SILOptimizer/PassManager/Transforms.h"
|
|
#include "swift/SILOptimizer/Utils/SILOptFunctionBuilder.h"
|
|
#include "swift/SILOptimizer/Utils/ConstantFolding.h"
|
|
|
|
using namespace swift;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Top Level Driver
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
namespace {
|
|
|
|
class ConstantPropagation : public SILFunctionTransform {
|
|
bool EnableDiagnostics;
|
|
|
|
public:
|
|
ConstantPropagation(bool EnableDiagnostics) :
|
|
EnableDiagnostics(EnableDiagnostics) {}
|
|
|
|
private:
|
|
/// The entry point to the transformation.
|
|
void run() override {
|
|
SILOptFunctionBuilder FuncBuilder(*this);
|
|
ConstantFolder Folder(FuncBuilder, getOptions().AssertConfig,
|
|
EnableDiagnostics);
|
|
Folder.initializeWorklist(*getFunction());
|
|
auto Invalidation = Folder.processWorkList();
|
|
|
|
if (Invalidation != SILAnalysis::InvalidationKind::Nothing) {
|
|
invalidateAnalysis(Invalidation);
|
|
}
|
|
}
|
|
};
|
|
|
|
} // end anonymous namespace
|
|
|
|
SILTransform *swift::createDiagnosticConstantPropagation() {
|
|
// Diagnostic propagation is rerun on deserialized SIL because it is sensitive
|
|
// to assert configuration.
|
|
return new ConstantPropagation(true /*enable diagnostics*/);
|
|
}
|
|
|
|
SILTransform *swift::createPerformanceConstantPropagation() {
|
|
return new ConstantPropagation(false /*disable diagnostics*/);
|
|
}
|