f54df0d09e
This avoid pulling in the entire Passes library with all passes as dependencies when just referring to PassPlugin, which is in fact independent of the Passes themselves. Pull Request: https://github.com/llvm/llvm-project/pull/173279
92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
#include "llvm/IR/Function.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/Pass.h"
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#include "llvm/Passes/PassBuilder.h"
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#include "llvm/Plugins/PassPlugin.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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static cl::opt<bool> Wave("wave-goodbye", cl::init(false),
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cl::desc("wave good bye"));
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static cl::opt<bool> LastWords("last-words", cl::init(false),
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cl::desc("say last words (suppress codegen)"));
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namespace {
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bool runBye(Function &F) {
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if (Wave) {
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errs() << "Bye: ";
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errs().write_escaped(F.getName()) << '\n';
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}
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return false;
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}
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struct LegacyBye : public FunctionPass {
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static char ID;
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LegacyBye() : FunctionPass(ID) {}
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bool runOnFunction(Function &F) override { return runBye(F); }
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};
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struct Bye : PassInfoMixin<Bye> {
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PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
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if (!runBye(F))
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return PreservedAnalyses::all();
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return PreservedAnalyses::none();
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}
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};
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void registerPassBuilderCallbacks(PassBuilder &PB) {
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PB.registerVectorizerStartEPCallback(
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[](llvm::FunctionPassManager &PM, OptimizationLevel Level) {
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PM.addPass(Bye());
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});
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PB.registerPipelineParsingCallback(
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[](StringRef Name, llvm::FunctionPassManager &PM,
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ArrayRef<llvm::PassBuilder::PipelineElement>) {
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if (Name == "goodbye") {
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PM.addPass(Bye());
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return true;
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}
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return false;
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});
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}
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bool preCodeGenCallback(Module &M, TargetMachine &, CodeGenFileType CGFT,
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raw_pwrite_stream &OS) {
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if (LastWords) {
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if (CGFT != CodeGenFileType::AssemblyFile) {
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// Test error emission.
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M.getContext().emitError("last words unsupported for binary output");
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return false;
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}
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OS << "CodeGen Bye\n";
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return true; // Suppress remaining compilation pipeline.
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}
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// Do nothing.
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return false;
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}
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} // namespace
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char LegacyBye::ID = 0;
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static RegisterPass<LegacyBye> X("goodbye", "Good Bye World Pass",
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false /* Only looks at CFG */,
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false /* Analysis Pass */);
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/* New PM Registration */
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llvm::PassPluginLibraryInfo getByePluginInfo() {
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return {LLVM_PLUGIN_API_VERSION, "Bye", LLVM_VERSION_STRING,
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registerPassBuilderCallbacks, preCodeGenCallback};
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}
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#ifndef LLVM_BYE_LINK_INTO_TOOLS
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extern "C" LLVM_ATTRIBUTE_WEAK ::llvm::PassPluginLibraryInfo
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llvmGetPassPluginInfo() {
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return getByePluginInfo();
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}
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#endif
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