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Virtualize swift compiler outputs (#63206)

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Using a virutal output backend to capture all the outputs from
swift-frontend invocation. This allows redirecting and/or mirroring
compiler outputs to multiple location using different OutputBackend.

As an example usage for the virtual outputs, teach swift compiler to
check its output determinism by running the compiler invocation
twice and compare the hash of all its outputs.

Virtual output will be used to enable caching in the future.
This commit is contained in:
Steven Wu
2023-04-05 23:34:37 +08:00
committed by GitHub
parent 829491b230
commit 09b8af86fb
52 changed files with 690 additions and 327 deletions
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26
lib/AST/FrontendSourceFileDepGraphFactory.cpp
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@@ -43,6 +43,7 @@
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/VirtualOutputBackend.h"
#include "llvm/Support/YAMLParser.h"
using namespace swift;
@@ -232,18 +233,19 @@ StringRef DependencyKey::Builder::getTopLevelName(const Decl *decl) {
bool fine_grained_dependencies::withReferenceDependencies(
llvm::PointerUnion<const ModuleDecl *, const SourceFile *> MSF,
const DependencyTracker &depTracker, StringRef outputPath,
bool alsoEmitDotFile,
const DependencyTracker &depTracker, llvm::vfs::OutputBackend &backend,
StringRef outputPath, bool alsoEmitDotFile,
llvm::function_ref<bool(SourceFileDepGraph &&)> cont) {
if (auto *MD = MSF.dyn_cast<const ModuleDecl *>()) {
SourceFileDepGraph g =
ModuleDepGraphFactory(MD, alsoEmitDotFile).construct();
ModuleDepGraphFactory(backend, MD, alsoEmitDotFile).construct();
return cont(std::move(g));
} else {
auto *SF = MSF.get<const SourceFile *>();
SourceFileDepGraph g = FrontendSourceFileDepGraphFactory(
SF, outputPath, depTracker, alsoEmitDotFile)
.construct();
SourceFileDepGraph g =
FrontendSourceFileDepGraphFactory(SF, backend, outputPath, depTracker,
alsoEmitDotFile)
.construct();
return cont(std::move(g));
}
}
@@ -253,11 +255,12 @@ bool fine_grained_dependencies::withReferenceDependencies(
//==============================================================================
FrontendSourceFileDepGraphFactory::FrontendSourceFileDepGraphFactory(
const SourceFile *SF, StringRef outputPath,
const DependencyTracker &depTracker, const bool alsoEmitDotFile)
const SourceFile *SF, llvm::vfs::OutputBackend &backend,
StringRef outputPath, const DependencyTracker &depTracker,
const bool alsoEmitDotFile)
: AbstractSourceFileDepGraphFactory(
SF->getASTContext().hadError(), outputPath, SF->getInterfaceHash(),
alsoEmitDotFile, SF->getASTContext().Diags),
alsoEmitDotFile, SF->getASTContext().Diags, backend),
SF(SF), depTracker(depTracker) {}
//==============================================================================
@@ -577,11 +580,12 @@ void FrontendSourceFileDepGraphFactory::addAllUsedDecls() {
// MARK: ModuleDepGraphFactory
//==============================================================================
ModuleDepGraphFactory::ModuleDepGraphFactory(const ModuleDecl *Mod,
ModuleDepGraphFactory::ModuleDepGraphFactory(llvm::vfs::OutputBackend &backend,
const ModuleDecl *Mod,
bool emitDot)
: AbstractSourceFileDepGraphFactory(
Mod->getASTContext().hadError(), Mod->getNameStr(),
Mod->getFingerprint(), emitDot, Mod->getASTContext().Diags),
Mod->getFingerprint(), emitDot, Mod->getASTContext().Diags, backend),
Mod(Mod) {}
void ModuleDepGraphFactory::addAllDefinedDecls() {