//
//===----------------------------------------------------------------------===//
//
-// This pass loops over all of the functions in the input module, looking for
+// This pass loops over all of the functions in the input module, looking for
// dead declarations and removes them. Dead declarations are declarations of
// functions for which no implementation is available (i.e., declarations for
// unused library functions).
//
//===----------------------------------------------------------------------===//
-#define DEBUG_TYPE "strip-dead-prototypes"
-#include "llvm/Transforms/IPO.h"
-#include "llvm/Pass.h"
-#include "llvm/Module.h"
+#include "llvm/Transforms/IPO/StripDeadPrototypes.h"
#include "llvm/ADT/Statistic.h"
-using namespace llvm;
-
-STATISTIC(NumDeadPrototypes, "Number of dead prototypes removed");
-
-namespace {
+#include "llvm/IR/Module.h"
+#include "llvm/Pass.h"
+#include "llvm/Transforms/IPO.h"
-/// @brief Pass to remove unused function declarations.
-class StripDeadPrototypesPass : public ModulePass {
-public:
- static char ID; // Pass identification, replacement for typeid
- StripDeadPrototypesPass() : ModulePass(&ID) { }
- virtual bool runOnModule(Module &M);
-};
+using namespace llvm;
-} // end anonymous namespace
+#define DEBUG_TYPE "strip-dead-prototypes"
-char StripDeadPrototypesPass::ID = 0;
-static RegisterPass<StripDeadPrototypesPass>
-X("strip-dead-prototypes", "Strip Unused Function Prototypes");
+STATISTIC(NumDeadPrototypes, "Number of dead prototypes removed");
-bool StripDeadPrototypesPass::runOnModule(Module &M) {
+static bool stripDeadPrototypes(Module &M) {
bool MadeChange = false;
-
+
// Erase dead function prototypes.
for (Module::iterator I = M.begin(), E = M.end(); I != E; ) {
- Function *F = I++;
+ Function *F = &*I++;
// Function must be a prototype and unused.
if (F->isDeclaration() && F->use_empty()) {
F->eraseFromParent();
// Erase dead global var prototypes.
for (Module::global_iterator I = M.global_begin(), E = M.global_end();
I != E; ) {
- GlobalVariable *GV = I++;
+ GlobalVariable *GV = &*I++;
// Global must be a prototype and unused.
if (GV->isDeclaration() && GV->use_empty())
GV->eraseFromParent();
}
-
+
// Return an indication of whether we changed anything or not.
return MadeChange;
}
+PreservedAnalyses StripDeadPrototypesPass::run(Module &M) {
+ if (stripDeadPrototypes(M))
+ return PreservedAnalyses::none();
+ return PreservedAnalyses::all();
+}
+
+namespace {
+
+class StripDeadPrototypesLegacyPass : public ModulePass {
+public:
+ static char ID; // Pass identification, replacement for typeid
+ StripDeadPrototypesLegacyPass() : ModulePass(ID) {
+ initializeStripDeadPrototypesLegacyPassPass(
+ *PassRegistry::getPassRegistry());
+ }
+ bool runOnModule(Module &M) override {
+ return stripDeadPrototypes(M);
+ }
+};
+
+} // end anonymous namespace
+
+char StripDeadPrototypesLegacyPass::ID = 0;
+INITIALIZE_PASS(StripDeadPrototypesLegacyPass, "strip-dead-prototypes",
+ "Strip Unused Function Prototypes", false, false)
+
ModulePass *llvm::createStripDeadPrototypesPass() {
- return new StripDeadPrototypesPass();
+ return new StripDeadPrototypesLegacyPass();
}