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#include "llvm/IR/Function.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/Pass.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Passes/PassPlugin.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/IPO/PassManagerBuilder.h"
using namespace llvm;
static cl::opt<bool> Wave("wave-goodbye", cl::init(false),
cl::desc("wave good bye"));
namespace {
bool runBye(Function &F) {
if (Wave) {
errs() << "Bye: ";
errs().write_escaped(F.getName()) << '\n';
}
return false;
}
struct LegacyBye : public FunctionPass {
static char ID;
LegacyBye() : FunctionPass(ID) {}
bool runOnFunction(Function &F) override { return runBye(F); }
};
struct Bye : PassInfoMixin<Bye> {
PreservedAnalyses run(Function &F, FunctionAnalysisManager &) {
if (!runBye(F))
return PreservedAnalyses::all();
return PreservedAnalyses::none();
}
};
} // namespace
char LegacyBye::ID = 0;
static RegisterPass<LegacyBye> X("goodbye", "Good Bye World Pass",
false /* Only looks at CFG */,
false /* Analysis Pass */);
/* Legacy PM Registration */
static llvm::RegisterStandardPasses RegisterBye(
llvm::PassManagerBuilder::EP_EarlyAsPossible,
[](const llvm::PassManagerBuilder &Builder,
llvm::legacy::PassManagerBase &PM) { PM.add(new LegacyBye()); });
/* New PM Registration */
llvm::PassPluginLibraryInfo getByePluginInfo() {
return {LLVM_PLUGIN_API_VERSION, "Bye", LLVM_VERSION_STRING,
[](PassBuilder &PB) {
PB.registerVectorizerStartEPCallback(
[](llvm::FunctionPassManager &PM,
llvm::PassBuilder::OptimizationLevel Level) {
PM.addPass(Bye());
});
}};
}
#ifndef LLVM_BYE_LINK_INTO_TOOLS
extern "C" LLVM_ATTRIBUTE_WEAK ::llvm::PassPluginLibraryInfo
llvmGetPassPluginInfo() {
return getByePluginInfo();
}
#endif
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