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https://github.com/c64scene-ar/llvm-6502.git
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3ed469ccd7
Turn on -Wunused and -Wno-unused-parameter. Clean up most of the resulting fall out by removing unused variables. Remaining warnings have to do with unused functions (I didn't want to delete code without review) and unused variables in generated code. Maintainers should clean up the remaining issues when they see them. All changes pass DejaGnu tests and Olden. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@31380 91177308-0d34-0410-b5e6-96231b3b80d8
82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
//===- TraceBasicBlocks.cpp - Insert basic-block trace instrumentation ----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This pass instruments the specified program with calls into a runtime
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// library that cause it to output a trace of basic blocks as a side effect
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// of normal execution.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Constants.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Module.h"
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#include "llvm/Pass.h"
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#include "llvm/Transforms/Utils/BasicBlockUtils.h"
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#include "llvm/Transforms/Instrumentation.h"
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#include "llvm/Instructions.h"
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#include "ProfilingUtils.h"
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#include "llvm/Support/Debug.h"
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#include <set>
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#include <iostream>
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using namespace llvm;
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namespace {
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class TraceBasicBlocks : public ModulePass {
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bool runOnModule(Module &M);
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};
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RegisterPass<TraceBasicBlocks> X("trace-basic-blocks",
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"Insert instrumentation for basic block tracing");
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}
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ModulePass *llvm::createTraceBasicBlockPass()
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{
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return new TraceBasicBlocks();
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}
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static void InsertInstrumentationCall (BasicBlock *BB,
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const std::string FnName,
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unsigned BBNumber) {
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DEBUG (std::cerr << "InsertInstrumentationCall (\"" << BB->getName ()
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<< "\", \"" << FnName << "\", " << BBNumber << ")\n");
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Module &M = *BB->getParent ()->getParent ();
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Function *InstrFn = M.getOrInsertFunction (FnName, Type::VoidTy,
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Type::UIntTy, (Type *)0);
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std::vector<Value*> Args (1);
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Args[0] = ConstantInt::get (Type::UIntTy, BBNumber);
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// Insert the call after any alloca or PHI instructions...
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BasicBlock::iterator InsertPos = BB->begin();
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while (isa<AllocaInst>(InsertPos) || isa<PHINode>(InsertPos))
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++InsertPos;
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new CallInst (InstrFn, Args, "", InsertPos);
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}
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bool TraceBasicBlocks::runOnModule(Module &M) {
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Function *Main = M.getMainFunction();
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if (Main == 0) {
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std::cerr << "WARNING: cannot insert basic-block trace instrumentation"
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<< " into a module with no main function!\n";
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return false; // No main, no instrumentation!
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}
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unsigned BBNumber = 0;
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for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F)
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for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
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InsertInstrumentationCall (BB, "llvm_trace_basic_block", BBNumber);
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++BBNumber;
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}
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// Add the initialization call to main.
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InsertProfilingInitCall(Main, "llvm_start_basic_block_tracing");
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return true;
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}
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