mirror of
https://github.com/c64scene-ar/llvm-6502.git
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d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 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/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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