mirror of
https://github.com/c64scene-ar/llvm-6502.git
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into their new header subdirectory: include/llvm/IR. This matches the directory structure of lib, and begins to correct a long standing point of file layout clutter in LLVM. There are still more header files to move here, but I wanted to handle them in separate commits to make tracking what files make sense at each layer easier. The only really questionable files here are the target intrinsic tablegen files. But that's a battle I'd rather not fight today. I've updated both CMake and Makefile build systems (I think, and my tests think, but I may have missed something). I've also re-sorted the includes throughout the project. I'll be committing updates to Clang, DragonEgg, and Polly momentarily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171366 91177308-0d34-0410-b5e6-96231b3b80d8
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
//===-- StripDeadPrototypes.cpp - Remove unused function declarations ----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass loops over all of the functions in the input module, looking for
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// dead declarations and removes them. Dead declarations are declarations of
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// functions for which no implementation is available (i.e., declarations for
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// unused library functions).
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "strip-dead-prototypes"
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#include "llvm/Transforms/IPO.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Pass.h"
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using namespace llvm;
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STATISTIC(NumDeadPrototypes, "Number of dead prototypes removed");
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namespace {
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/// @brief Pass to remove unused function declarations.
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class StripDeadPrototypesPass : public ModulePass {
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public:
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static char ID; // Pass identification, replacement for typeid
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StripDeadPrototypesPass() : ModulePass(ID) {
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initializeStripDeadPrototypesPassPass(*PassRegistry::getPassRegistry());
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}
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virtual bool runOnModule(Module &M);
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};
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} // end anonymous namespace
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char StripDeadPrototypesPass::ID = 0;
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INITIALIZE_PASS(StripDeadPrototypesPass, "strip-dead-prototypes",
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"Strip Unused Function Prototypes", false, false)
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bool StripDeadPrototypesPass::runOnModule(Module &M) {
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bool MadeChange = false;
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// Erase dead function prototypes.
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ) {
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Function *F = I++;
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// Function must be a prototype and unused.
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if (F->isDeclaration() && F->use_empty()) {
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F->eraseFromParent();
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++NumDeadPrototypes;
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MadeChange = true;
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}
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}
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// Erase dead global var prototypes.
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for (Module::global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ) {
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GlobalVariable *GV = I++;
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// Global must be a prototype and unused.
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if (GV->isDeclaration() && GV->use_empty())
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GV->eraseFromParent();
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}
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// Return an indication of whether we changed anything or not.
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return MadeChange;
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}
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ModulePass *llvm::createStripDeadPrototypesPass() {
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return new StripDeadPrototypesPass();
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}
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