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//===- PNaClABIVerifyFunctions.cpp - Verify PNaCl ABI rules --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Verify function-level PNaCl ABI requirements.
//
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/Twine.h"
#include "llvm/Function.h"
#include "llvm/Instruction.h"
#include "llvm/Pass.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Analysis/NaCl.h"
using namespace llvm;
namespace {
// Checks that examine anything in the function body should be in
// FunctionPasses to make them streaming-friendly
struct PNaClABIVerifyFunctions : public FunctionPass {
static char ID;
PNaClABIVerifyFunctions() : FunctionPass(ID) {}
bool runOnFunction(Function &F);
// For now, this print method exists to allow us to run the pass with
// opt -analyze to avoid dumping the result to stdout, to make testing
// simpler. In the future we will probably want to make it do something
// useful.
virtual void print(llvm::raw_ostream &O, const Module *M) const {};
};
} // and anonymous namespace
bool PNaClABIVerifyFunctions::runOnFunction(Function &F) {
for (Function::const_iterator FI = F.begin(), FE = F.end();
FI != FE; ++FI) {
for (BasicBlock::const_iterator BBI = FI->begin(), BBE = FI->end();
BBI != BBE; ++BBI) {
switch (BBI->getOpcode()) {
// Terminator instructions
case Instruction::Ret:
case Instruction::Br:
case Instruction::Switch:
case Instruction::Resume:
case Instruction::Unreachable:
// indirectbr is not allowed for now.
// invoke and call are handled separately.
break;
default:
errs() << Twine("Function ") + F.getName() +
" has disallowed instruction: " +
BBI->getOpcodeName() + "\n";
}
}
}
return false;
}
char PNaClABIVerifyFunctions::ID = 0;
static RegisterPass<PNaClABIVerifyFunctions> X("verify-pnaclabi-functions",
"Verify functions for PNaCl", false, false);
FunctionPass *llvm::createPNaClABIVerifyFunctionsPass() {
return new PNaClABIVerifyFunctions();
}
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