2001-06-06 20:29:01 +00:00
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//===-- Verifier.cpp - Implement the Module Verifier -------------*- C++ -*-==//
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2003-10-20 19:43:21 +00:00
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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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2001-06-06 20:29:01 +00:00
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//
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2002-03-29 19:06:18 +00:00
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// This file defines the function verifier interface, that can be used for some
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2001-06-06 20:29:01 +00:00
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// sanity checking of input to the system.
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//
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// Note that this does not provide full 'java style' security and verifications,
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// instead it just tries to ensure that code is well formed.
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//
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2002-04-18 20:37:37 +00:00
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// * Both of a binary operator's parameters are the same type
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2002-04-24 19:12:21 +00:00
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// * Verify that the indices of mem access instructions match other operands
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2002-09-09 20:26:04 +00:00
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// * Verify that arithmetic and other things are only performed on first class
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2002-08-02 17:37:08 +00:00
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// types. Verify that shifts & logicals only happen on integrals f.e.
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2001-06-06 20:29:01 +00:00
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// . All of the constants in a switch statement are of the correct type
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2002-08-02 17:37:08 +00:00
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// * The code is in valid SSA form
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2001-06-06 20:29:01 +00:00
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// . It should be illegal to put a label into any other type (like a structure)
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// or to return one. [except constant arrays!]
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2002-03-14 16:53:48 +00:00
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// * Only phi nodes can be self referential: 'add int %0, %0 ; <int>:0' is bad
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2002-02-20 17:55:43 +00:00
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// * PHI nodes must have an entry for each predecessor, with no extras.
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2002-06-25 15:56:27 +00:00
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// * PHI nodes must be the first thing in a basic block, all grouped together
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2002-10-06 21:00:31 +00:00
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// * PHI nodes must have at least one entry
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2002-06-25 15:56:27 +00:00
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// * All basic blocks should only end with terminator insts, not contain them
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2002-03-29 19:06:18 +00:00
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// * The entry node to a function must not have predecessors
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2003-10-10 17:54:14 +00:00
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// * All Instructions must be embedded into a basic block
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2002-03-29 19:06:18 +00:00
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// . Function's cannot take a void typed parameter
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2002-04-13 22:48:46 +00:00
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// * Verify that a function's argument list agrees with it's declared type.
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2002-03-15 20:25:09 +00:00
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// * It is illegal to specify a name for a void value.
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2003-10-10 17:54:14 +00:00
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// * It is illegal to have a internal global value with no initializer
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2002-04-12 18:20:49 +00:00
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// * It is illegal to have a ret instruction that returns a value that does not
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// agree with the function return value type.
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2002-05-08 19:49:50 +00:00
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// * Function call argument types match the function prototype
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2002-04-24 19:12:21 +00:00
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// * All other things that are tested by asserts spread about the code...
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2001-06-06 20:29:01 +00:00
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Analysis/Verifier.h"
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2003-11-16 23:07:42 +00:00
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#include "llvm/Assembly/Writer.h"
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2004-02-14 02:47:17 +00:00
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#include "llvm/Constants.h"
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2002-02-20 17:55:43 +00:00
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#include "llvm/Pass.h"
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2001-06-06 20:29:01 +00:00
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#include "llvm/Module.h"
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2004-03-14 03:16:15 +00:00
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#include "llvm/ModuleProvider.h"
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2002-04-13 22:48:46 +00:00
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#include "llvm/DerivedTypes.h"
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2004-02-14 02:47:17 +00:00
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#include "llvm/Instructions.h"
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2003-05-08 03:47:33 +00:00
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#include "llvm/Intrinsics.h"
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2004-02-14 02:47:17 +00:00
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#include "llvm/PassManager.h"
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#include "llvm/SymbolTable.h"
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2002-08-02 17:37:08 +00:00
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#include "llvm/Analysis/Dominators.h"
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2002-02-20 17:55:43 +00:00
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#include "llvm/Support/CFG.h"
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2002-04-18 20:37:37 +00:00
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#include "llvm/Support/InstVisitor.h"
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2002-02-20 17:55:43 +00:00
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#include "Support/STLExtras.h"
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#include <algorithm>
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2004-04-02 15:45:08 +00:00
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#include <sstream>
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2003-11-21 20:23:48 +00:00
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using namespace llvm;
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2003-11-11 22:41:34 +00:00
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2002-04-18 20:37:37 +00:00
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namespace { // Anonymous namespace for class
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2001-06-06 20:29:01 +00:00
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2002-04-27 06:56:12 +00:00
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struct Verifier : public FunctionPass, InstVisitor<Verifier> {
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2002-08-02 17:37:08 +00:00
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bool Broken; // Is this module found to be broken?
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bool RealPass; // Are we not being run by a PassManager?
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2004-04-02 15:45:08 +00:00
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VerifierFailureAction action;
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// What to do if verification fails.
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2004-03-02 00:22:19 +00:00
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Module *Mod; // Module we are verifying right now
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DominatorSet *DS; // Dominator set, caution can be null!
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2004-04-02 15:45:08 +00:00
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std::stringstream msgs; // A stringstream to collect messages
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Verifier()
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: Broken(false), RealPass(true), action(AbortProcessAction),
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DS(0), msgs( std::ios_base::app | std::ios_base::out ) {}
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Verifier( VerifierFailureAction ctn )
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: Broken(false), RealPass(true), action(ctn), DS(0),
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msgs( std::ios_base::app | std::ios_base::out ) {}
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Verifier(bool AB )
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: Broken(false), RealPass(true),
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action( AB ? AbortProcessAction : PrintMessageAction), DS(0),
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msgs( std::ios_base::app | std::ios_base::out ) {}
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2002-08-02 17:37:08 +00:00
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Verifier(DominatorSet &ds)
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2004-04-02 15:45:08 +00:00
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: Broken(false), RealPass(false), action(PrintMessageAction),
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DS(&ds), msgs( std::ios_base::app | std::ios_base::out ) {}
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2002-02-20 17:55:43 +00:00
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2002-06-25 15:56:27 +00:00
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bool doInitialization(Module &M) {
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2003-11-16 23:07:42 +00:00
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Mod = &M;
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2002-06-25 15:56:27 +00:00
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verifySymbolTable(M.getSymbolTable());
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2002-09-19 16:12:19 +00:00
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// If this is a real pass, in a pass manager, we must abort before
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// returning back to the pass manager, or else the pass manager may try to
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// run other passes on the broken module.
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if (RealPass)
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abortIfBroken();
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2002-04-18 20:37:37 +00:00
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return false;
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}
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2001-06-06 20:29:01 +00:00
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2002-06-25 15:56:27 +00:00
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bool runOnFunction(Function &F) {
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2002-08-02 17:37:08 +00:00
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// Get dominator information if we are being run by PassManager
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if (RealPass) DS = &getAnalysis<DominatorSet>();
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2002-04-18 20:37:37 +00:00
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visit(F);
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2002-09-19 16:12:19 +00:00
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// If this is a real pass, in a pass manager, we must abort before
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// returning back to the pass manager, or else the pass manager may try to
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// run other passes on the broken module.
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if (RealPass)
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abortIfBroken();
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2002-04-18 20:37:37 +00:00
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return false;
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}
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2002-02-20 17:55:43 +00:00
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2002-06-25 15:56:27 +00:00
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bool doFinalization(Module &M) {
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2002-04-28 16:04:26 +00:00
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// Scan through, checking all of the external function's linkage now...
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2002-06-25 15:56:27 +00:00
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for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
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2003-04-16 20:42:40 +00:00
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visitGlobalValue(*I);
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2002-04-28 16:04:26 +00:00
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2002-10-06 22:47:32 +00:00
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for (Module::giterator I = M.gbegin(), E = M.gend(); I != E; ++I)
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2003-11-21 20:33:27 +00:00
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visitGlobalValue(*I);
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2002-10-06 22:47:32 +00:00
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2002-09-19 16:12:19 +00:00
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// If the module is broken, abort at this time.
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abortIfBroken();
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2002-04-24 19:12:21 +00:00
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return false;
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}
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2002-04-28 21:27:06 +00:00
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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2002-08-02 17:37:08 +00:00
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if (RealPass)
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2002-08-08 19:01:28 +00:00
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AU.addRequired<DominatorSet>();
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2002-04-28 21:27:06 +00:00
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}
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2004-03-02 00:22:19 +00:00
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/// abortIfBroken - If the module is broken and we are supposed to abort on
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/// this condition, do so.
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///
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2004-04-02 15:45:08 +00:00
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void abortIfBroken() {
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if (Broken)
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{
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msgs << "Broken module found, ";
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switch (action)
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{
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case AbortProcessAction:
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msgs << "compilation aborted!\n";
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std::cerr << msgs.str();
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abort();
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case ThrowExceptionAction:
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msgs << "verification terminated.\n";
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throw msgs.str();
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case PrintMessageAction:
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msgs << "verification continues.\n";
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std::cerr << msgs.str();
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break;
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case ReturnStatusAction:
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break;
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}
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2002-09-19 16:12:19 +00:00
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}
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}
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2003-04-16 20:42:40 +00:00
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2002-04-18 20:37:37 +00:00
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// Verification methods...
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2002-11-20 18:36:02 +00:00
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void verifySymbolTable(SymbolTable &ST);
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2003-04-16 20:42:40 +00:00
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void visitGlobalValue(GlobalValue &GV);
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2002-06-25 15:56:27 +00:00
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void visitFunction(Function &F);
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void visitBasicBlock(BasicBlock &BB);
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void visitPHINode(PHINode &PN);
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void visitBinaryOperator(BinaryOperator &B);
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2002-09-09 20:26:04 +00:00
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void visitShiftInst(ShiftInst &SI);
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2003-10-18 05:57:43 +00:00
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void visitVANextInst(VANextInst &VAN) { visitInstruction(VAN); }
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void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
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2002-06-25 15:56:27 +00:00
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void visitCallInst(CallInst &CI);
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void visitGetElementPtrInst(GetElementPtrInst &GEP);
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void visitLoadInst(LoadInst &LI);
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void visitStoreInst(StoreInst &SI);
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void visitInstruction(Instruction &I);
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void visitTerminatorInst(TerminatorInst &I);
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void visitReturnInst(ReturnInst &RI);
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2004-03-12 05:54:31 +00:00
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void visitSelectInst(SelectInst &SI);
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2002-11-21 16:54:22 +00:00
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void visitUserOp1(Instruction &I);
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void visitUserOp2(Instruction &I) { visitUserOp1(I); }
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2003-11-11 22:41:34 +00:00
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void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
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2002-04-18 20:37:37 +00:00
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2003-11-21 17:35:51 +00:00
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void WriteValue(const Value *V) {
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if (!V) return;
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2003-11-21 20:23:48 +00:00
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if (isa<Instruction>(V)) {
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2004-04-02 15:45:08 +00:00
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msgs << *V;
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2003-11-21 20:23:48 +00:00
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} else if (const Type *Ty = dyn_cast<Type>(V)) {
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2004-04-02 15:45:08 +00:00
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WriteTypeSymbolic(msgs, Ty, Mod);
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2003-11-21 20:23:48 +00:00
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} else {
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2004-04-02 15:45:08 +00:00
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WriteAsOperand (msgs, V, true, true, Mod);
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msgs << "\n";
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2003-11-21 17:35:51 +00:00
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}
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}
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2002-04-18 20:37:37 +00:00
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// CheckFailed - A check failed, so print out the condition and the message
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// that failed. This provides a nice place to put a breakpoint if you want
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// to see why something is not correct.
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2003-11-21 17:35:51 +00:00
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void CheckFailed(const std::string &Message,
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const Value *V1 = 0, const Value *V2 = 0,
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const Value *V3 = 0, const Value *V4 = 0) {
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2004-04-02 15:45:08 +00:00
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msgs << Message << "\n";
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2003-11-21 17:35:51 +00:00
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WriteValue(V1);
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WriteValue(V2);
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WriteValue(V3);
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WriteValue(V4);
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2002-04-18 20:37:37 +00:00
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Broken = true;
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2002-02-20 17:55:43 +00:00
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}
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2002-04-18 20:37:37 +00:00
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};
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2002-07-23 18:08:17 +00:00
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2003-11-13 19:47:29 +00:00
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RegisterOpt<Verifier> X("verify", "Module Verifier");
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2003-11-21 20:23:48 +00:00
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} // End anonymous namespace
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2002-02-20 17:55:43 +00:00
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2002-04-18 20:37:37 +00:00
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// Assert - We know that cond should be true, if not print an error message.
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#define Assert(C, M) \
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2002-04-28 16:06:24 +00:00
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do { if (!(C)) { CheckFailed(M); return; } } while (0)
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2002-04-18 20:37:37 +00:00
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#define Assert1(C, M, V1) \
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2002-04-28 16:06:24 +00:00
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do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
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2002-04-18 20:37:37 +00:00
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#define Assert2(C, M, V1, V2) \
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2002-04-28 16:06:24 +00:00
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do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
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2002-06-25 15:56:27 +00:00
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#define Assert3(C, M, V1, V2, V3) \
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do { if (!(C)) { CheckFailed(M, V1, V2, V3); return; } } while (0)
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#define Assert4(C, M, V1, V2, V3, V4) \
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do { if (!(C)) { CheckFailed(M, V1, V2, V3, V4); return; } } while (0)
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2002-02-20 17:55:43 +00:00
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2001-06-06 20:29:01 +00:00
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2003-04-16 20:42:40 +00:00
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void Verifier::visitGlobalValue(GlobalValue &GV) {
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Assert1(!GV.isExternal() || GV.hasExternalLinkage(),
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2003-11-21 20:33:27 +00:00
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"Global is external, but doesn't have external linkage!", &GV);
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2003-04-16 20:42:40 +00:00
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Assert1(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
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"Only global variables can have appending linkage!", &GV);
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if (GV.hasAppendingLinkage()) {
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GlobalVariable &GVar = cast<GlobalVariable>(GV);
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Assert1(isa<ArrayType>(GVar.getType()->getElementType()),
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"Only global arrays can have appending linkage!", &GV);
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}
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}
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2002-04-13 22:48:46 +00:00
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// verifySymbolTable - Verify that a function or module symbol table is ok
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2002-03-15 20:25:09 +00:00
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//
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2002-11-20 18:36:02 +00:00
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void Verifier::verifySymbolTable(SymbolTable &ST) {
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2002-03-15 20:25:09 +00:00
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// Loop over all of the types in the symbol table...
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2002-11-20 18:36:02 +00:00
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for (SymbolTable::iterator TI = ST.begin(), TE = ST.end(); TI != TE; ++TI)
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2002-04-18 20:37:37 +00:00
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for (SymbolTable::type_iterator I = TI->second.begin(),
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2002-03-15 20:25:09 +00:00
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E = TI->second.end(); I != E; ++I) {
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Value *V = I->second;
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// Check that there are no void typed values in the symbol table. Values
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// with a void type cannot be put into symbol tables because they cannot
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// have names!
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Assert1(V->getType() != Type::VoidTy,
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2002-04-28 16:06:24 +00:00
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"Values with void type are not allowed to have names!", V);
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2002-03-15 20:25:09 +00:00
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}
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}
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2001-06-06 20:29:01 +00:00
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2002-04-18 20:37:37 +00:00
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// visitFunction - Verify that a function is ok.
|
2002-02-20 17:55:43 +00:00
|
|
|
//
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitFunction(Function &F) {
|
2002-04-13 22:48:46 +00:00
|
|
|
// Check function arguments...
|
2002-06-25 15:56:27 +00:00
|
|
|
const FunctionType *FT = F.getFunctionType();
|
|
|
|
unsigned NumArgs = F.getArgumentList().size();
|
2002-04-13 22:48:46 +00:00
|
|
|
|
2002-10-13 20:57:00 +00:00
|
|
|
Assert2(FT->getNumParams() == NumArgs,
|
2002-04-13 22:48:46 +00:00
|
|
|
"# formal arguments must match # of arguments for function type!",
|
2002-06-25 15:56:27 +00:00
|
|
|
&F, FT);
|
2003-11-21 22:32:23 +00:00
|
|
|
Assert1(F.getReturnType()->isFirstClassType() ||
|
|
|
|
F.getReturnType() == Type::VoidTy,
|
|
|
|
"Functions cannot return aggregate values!", &F);
|
2002-04-13 22:48:46 +00:00
|
|
|
|
|
|
|
// Check that the argument values match the function type for this function...
|
2002-10-13 20:57:00 +00:00
|
|
|
unsigned i = 0;
|
|
|
|
for (Function::aiterator I = F.abegin(), E = F.aend(); I != E; ++I, ++i)
|
|
|
|
Assert2(I->getType() == FT->getParamType(i),
|
|
|
|
"Argument value does not match function argument type!",
|
|
|
|
I, FT->getParamType(i));
|
|
|
|
|
|
|
|
if (!F.isExternal()) {
|
|
|
|
verifySymbolTable(F.getSymbolTable());
|
|
|
|
|
|
|
|
// Check the entry node
|
2003-09-20 14:39:18 +00:00
|
|
|
BasicBlock *Entry = &F.getEntryBlock();
|
2002-10-13 20:57:00 +00:00
|
|
|
Assert1(pred_begin(Entry) == pred_end(Entry),
|
|
|
|
"Entry block to function must not have predecessors!", Entry);
|
2002-04-13 22:48:46 +00:00
|
|
|
}
|
2002-04-18 20:37:37 +00:00
|
|
|
}
|
|
|
|
|
2001-06-06 20:29:01 +00:00
|
|
|
|
2002-04-18 20:37:37 +00:00
|
|
|
// verifyBasicBlock - Verify that a basic block is well formed...
|
|
|
|
//
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitBasicBlock(BasicBlock &BB) {
|
2003-10-05 17:44:18 +00:00
|
|
|
// Check constraints that this basic block imposes on all of the PHI nodes in
|
|
|
|
// it.
|
|
|
|
if (isa<PHINode>(BB.front())) {
|
|
|
|
std::vector<BasicBlock*> Preds(pred_begin(&BB), pred_end(&BB));
|
|
|
|
std::sort(Preds.begin(), Preds.end());
|
|
|
|
|
|
|
|
for (BasicBlock::iterator I = BB.begin();
|
|
|
|
PHINode *PN = dyn_cast<PHINode>(I); ++I) {
|
|
|
|
|
|
|
|
// Ensure that PHI nodes have at least one entry!
|
|
|
|
Assert1(PN->getNumIncomingValues() != 0,
|
|
|
|
"PHI nodes must have at least one entry. If the block is dead, "
|
|
|
|
"the PHI should be removed!", PN);
|
|
|
|
Assert1(PN->getNumIncomingValues() >= Preds.size(),
|
|
|
|
"PHINode has more entries than the basic block has predecessors!",
|
|
|
|
PN);
|
|
|
|
Assert1(PN->getNumIncomingValues() <= Preds.size(),
|
|
|
|
"PHINode has less entries than the basic block has predecessors!",
|
|
|
|
PN);
|
|
|
|
|
|
|
|
// Get and sort all incoming values in the PHI node...
|
|
|
|
std::vector<std::pair<BasicBlock*, Value*> > Values;
|
|
|
|
Values.reserve(PN->getNumIncomingValues());
|
|
|
|
for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i)
|
|
|
|
Values.push_back(std::make_pair(PN->getIncomingBlock(i),
|
|
|
|
PN->getIncomingValue(i)));
|
|
|
|
std::sort(Values.begin(), Values.end());
|
|
|
|
|
|
|
|
for (unsigned i = 0, e = Values.size(); i != e; ++i) {
|
|
|
|
// Check to make sure that if there is more than one entry for a
|
|
|
|
// particular basic block in this PHI node, that the incoming values are
|
|
|
|
// all identical.
|
|
|
|
//
|
|
|
|
Assert4(i == 0 || Values[i].first != Values[i-1].first ||
|
|
|
|
Values[i].second == Values[i-1].second,
|
|
|
|
"PHI node has multiple entries for the same basic block with "
|
|
|
|
"different incoming values!", PN, Values[i].first,
|
|
|
|
Values[i].second, Values[i-1].second);
|
|
|
|
|
|
|
|
// Check to make sure that the predecessors and PHI node entries are
|
|
|
|
// matched up.
|
|
|
|
Assert3(Values[i].first == Preds[i],
|
|
|
|
"PHI node entries do not match predecessors!", PN,
|
|
|
|
Values[i].first, Preds[i]);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
// Ensure that basic blocks have terminators!
|
|
|
|
Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
|
|
|
|
}
|
|
|
|
|
|
|
|
void Verifier::visitTerminatorInst(TerminatorInst &I) {
|
|
|
|
// Ensure that terminators only exist at the end of the basic block.
|
|
|
|
Assert1(&I == I.getParent()->getTerminator(),
|
|
|
|
"Terminator found in the middle of a basic block!", I.getParent());
|
2002-07-18 00:13:42 +00:00
|
|
|
visitInstruction(I);
|
2002-06-25 15:56:27 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
void Verifier::visitReturnInst(ReturnInst &RI) {
|
|
|
|
Function *F = RI.getParent()->getParent();
|
|
|
|
if (RI.getNumOperands() == 0)
|
|
|
|
Assert1(F->getReturnType() == Type::VoidTy,
|
|
|
|
"Function returns no value, but ret instruction found that does!",
|
|
|
|
&RI);
|
|
|
|
else
|
|
|
|
Assert2(F->getReturnType() == RI.getOperand(0)->getType(),
|
|
|
|
"Function return type does not match operand "
|
|
|
|
"type of return inst!", &RI, F->getReturnType());
|
|
|
|
|
2003-08-18 14:43:39 +00:00
|
|
|
// Check to make sure that the return value has necessary properties for
|
2002-06-25 15:56:27 +00:00
|
|
|
// terminators...
|
|
|
|
visitTerminatorInst(RI);
|
2001-06-06 20:29:01 +00:00
|
|
|
}
|
|
|
|
|
2004-03-12 05:54:31 +00:00
|
|
|
void Verifier::visitSelectInst(SelectInst &SI) {
|
|
|
|
Assert1(SI.getCondition()->getType() == Type::BoolTy,
|
|
|
|
"Select condition type must be bool!", &SI);
|
|
|
|
Assert1(SI.getTrueValue()->getType() == SI.getFalseValue()->getType(),
|
|
|
|
"Select values must have identical types!", &SI);
|
|
|
|
Assert1(SI.getTrueValue()->getType() == SI.getType(),
|
|
|
|
"Select values must have same type as select instruction!", &SI);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-03-02 00:22:19 +00:00
|
|
|
/// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
|
|
|
|
/// a pass, if any exist, it's an error.
|
|
|
|
///
|
2002-11-21 16:54:22 +00:00
|
|
|
void Verifier::visitUserOp1(Instruction &I) {
|
|
|
|
Assert1(0, "User-defined operators should not live outside of a pass!",
|
|
|
|
&I);
|
|
|
|
}
|
2001-06-06 20:29:01 +00:00
|
|
|
|
2004-03-02 00:22:19 +00:00
|
|
|
/// visitPHINode - Ensure that a PHI node is well formed.
|
|
|
|
///
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitPHINode(PHINode &PN) {
|
|
|
|
// Ensure that the PHI nodes are all grouped together at the top of the block.
|
|
|
|
// This can be tested by checking whether the instruction before this is
|
2003-10-10 17:54:14 +00:00
|
|
|
// either nonexistent (because this is begin()) or is a PHI node. If not,
|
2002-06-25 15:56:27 +00:00
|
|
|
// then there is some other instruction before a PHI.
|
2003-10-05 17:44:18 +00:00
|
|
|
Assert2(&PN.getParent()->front() == &PN || isa<PHINode>(PN.getPrev()),
|
2002-06-25 15:56:27 +00:00
|
|
|
"PHI nodes not grouped at top of basic block!",
|
|
|
|
&PN, PN.getParent());
|
|
|
|
|
2003-11-12 07:13:37 +00:00
|
|
|
// Check that all of the operands of the PHI node have the same type as the
|
|
|
|
// result.
|
|
|
|
for (unsigned i = 0, e = PN.getNumIncomingValues(); i != e; ++i)
|
|
|
|
Assert1(PN.getType() == PN.getIncomingValue(i)->getType(),
|
|
|
|
"PHI node operands are not the same type as the result!", &PN);
|
|
|
|
|
2003-10-05 17:44:18 +00:00
|
|
|
// All other PHI node constraints are checked in the visitBasicBlock method.
|
2002-04-18 20:37:37 +00:00
|
|
|
|
|
|
|
visitInstruction(PN);
|
|
|
|
}
|
2002-03-15 20:25:09 +00:00
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitCallInst(CallInst &CI) {
|
|
|
|
Assert1(isa<PointerType>(CI.getOperand(0)->getType()),
|
|
|
|
"Called function must be a pointer!", &CI);
|
|
|
|
const PointerType *FPTy = cast<PointerType>(CI.getOperand(0)->getType());
|
2002-04-18 22:11:52 +00:00
|
|
|
Assert1(isa<FunctionType>(FPTy->getElementType()),
|
2002-06-25 15:56:27 +00:00
|
|
|
"Called function is not pointer to function type!", &CI);
|
2002-05-08 19:49:50 +00:00
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
const FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
|
2002-05-08 19:49:50 +00:00
|
|
|
|
|
|
|
// Verify that the correct number of arguments are being passed
|
|
|
|
if (FTy->isVarArg())
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert1(CI.getNumOperands()-1 >= FTy->getNumParams(),
|
|
|
|
"Called function requires more parameters than were provided!",&CI);
|
2002-05-08 19:49:50 +00:00
|
|
|
else
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert1(CI.getNumOperands()-1 == FTy->getNumParams(),
|
|
|
|
"Incorrect number of arguments passed to called function!", &CI);
|
2002-05-08 19:49:50 +00:00
|
|
|
|
|
|
|
// Verify that all arguments to the call match the function type...
|
|
|
|
for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
|
2004-02-24 22:06:07 +00:00
|
|
|
Assert3(CI.getOperand(i+1)->getType() == FTy->getParamType(i),
|
2002-05-08 19:49:50 +00:00
|
|
|
"Call parameter type does not match function signature!",
|
2004-02-24 22:06:07 +00:00
|
|
|
CI.getOperand(i+1), FTy->getParamType(i), &CI);
|
2002-07-18 00:13:42 +00:00
|
|
|
|
2003-05-08 03:47:33 +00:00
|
|
|
if (Function *F = CI.getCalledFunction())
|
2003-11-11 22:41:34 +00:00
|
|
|
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
|
2003-05-08 03:47:33 +00:00
|
|
|
visitIntrinsicFunctionCall(ID, CI);
|
|
|
|
|
2002-07-18 00:13:42 +00:00
|
|
|
visitInstruction(CI);
|
2002-04-18 22:11:52 +00:00
|
|
|
}
|
2002-04-18 20:37:37 +00:00
|
|
|
|
2004-03-02 00:22:19 +00:00
|
|
|
/// visitBinaryOperator - Check that both arguments to the binary operator are
|
|
|
|
/// of the same type!
|
|
|
|
///
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitBinaryOperator(BinaryOperator &B) {
|
2002-09-09 20:26:04 +00:00
|
|
|
Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
|
|
|
|
"Both operands to a binary operator are not of the same type!", &B);
|
|
|
|
|
|
|
|
// Check that logical operators are only used with integral operands.
|
|
|
|
if (B.getOpcode() == Instruction::And || B.getOpcode() == Instruction::Or ||
|
|
|
|
B.getOpcode() == Instruction::Xor) {
|
|
|
|
Assert1(B.getType()->isIntegral(),
|
|
|
|
"Logical operators only work with integral types!", &B);
|
|
|
|
Assert1(B.getType() == B.getOperand(0)->getType(),
|
|
|
|
"Logical operators must have same type for operands and result!",
|
|
|
|
&B);
|
|
|
|
} else if (isa<SetCondInst>(B)) {
|
|
|
|
// Check that setcc instructions return bool
|
|
|
|
Assert1(B.getType() == Type::BoolTy,
|
|
|
|
"setcc instructions must return boolean values!", &B);
|
|
|
|
} else {
|
|
|
|
// Arithmetic operators only work on integer or fp values
|
|
|
|
Assert1(B.getType() == B.getOperand(0)->getType(),
|
|
|
|
"Arithmetic operators must have same type for operands and result!",
|
|
|
|
&B);
|
|
|
|
Assert1(B.getType()->isInteger() || B.getType()->isFloatingPoint(),
|
2002-09-10 04:52:59 +00:00
|
|
|
"Arithmetic operators must have integer or fp type!", &B);
|
2002-09-09 20:26:04 +00:00
|
|
|
}
|
|
|
|
|
2002-04-18 20:37:37 +00:00
|
|
|
visitInstruction(B);
|
2002-02-20 17:55:43 +00:00
|
|
|
}
|
|
|
|
|
2002-09-09 20:26:04 +00:00
|
|
|
void Verifier::visitShiftInst(ShiftInst &SI) {
|
|
|
|
Assert1(SI.getType()->isInteger(),
|
|
|
|
"Shift must return an integer result!", &SI);
|
|
|
|
Assert1(SI.getType() == SI.getOperand(0)->getType(),
|
|
|
|
"Shift return type must be same as first operand!", &SI);
|
|
|
|
Assert1(SI.getOperand(1)->getType() == Type::UByteTy,
|
|
|
|
"Second operand to shift must be ubyte type!", &SI);
|
|
|
|
visitInstruction(SI);
|
|
|
|
}
|
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
|
2002-08-22 23:37:20 +00:00
|
|
|
const Type *ElTy =
|
|
|
|
GetElementPtrInst::getIndexedType(GEP.getOperand(0)->getType(),
|
|
|
|
std::vector<Value*>(GEP.idx_begin(), GEP.idx_end()), true);
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
|
|
|
|
Assert2(PointerType::get(ElTy) == GEP.getType(),
|
|
|
|
"GEP is not of right type for indices!", &GEP, ElTy);
|
2002-04-24 19:12:21 +00:00
|
|
|
visitInstruction(GEP);
|
|
|
|
}
|
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitLoadInst(LoadInst &LI) {
|
2002-08-22 22:49:05 +00:00
|
|
|
const Type *ElTy =
|
|
|
|
cast<PointerType>(LI.getOperand(0)->getType())->getElementType();
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert2(ElTy == LI.getType(),
|
2003-11-21 17:06:29 +00:00
|
|
|
"Load result type does not match pointer operand type!", &LI, ElTy);
|
2002-04-24 19:12:21 +00:00
|
|
|
visitInstruction(LI);
|
|
|
|
}
|
|
|
|
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitStoreInst(StoreInst &SI) {
|
2002-08-22 22:49:05 +00:00
|
|
|
const Type *ElTy =
|
|
|
|
cast<PointerType>(SI.getOperand(1)->getType())->getElementType();
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert2(ElTy == SI.getOperand(0)->getType(),
|
2003-11-21 17:06:29 +00:00
|
|
|
"Stored value type does not match pointer operand type!", &SI, ElTy);
|
2002-04-24 19:12:21 +00:00
|
|
|
visitInstruction(SI);
|
|
|
|
}
|
|
|
|
|
2002-04-18 20:37:37 +00:00
|
|
|
|
2004-03-02 00:22:19 +00:00
|
|
|
/// verifyInstruction - Verify that an instruction is well formed.
|
|
|
|
///
|
2002-06-25 15:56:27 +00:00
|
|
|
void Verifier::visitInstruction(Instruction &I) {
|
2002-09-09 20:26:04 +00:00
|
|
|
BasicBlock *BB = I.getParent();
|
|
|
|
Assert1(BB, "Instruction not embedded in basic block!", &I);
|
2002-04-18 20:37:37 +00:00
|
|
|
|
|
|
|
if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
|
2002-06-25 15:56:27 +00:00
|
|
|
for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
|
2002-04-18 20:37:37 +00:00
|
|
|
UI != UE; ++UI)
|
2004-02-27 17:28:25 +00:00
|
|
|
Assert1(*UI != (User*)&I ||
|
|
|
|
!DS->dominates(&BB->getParent()->getEntryBlock(), BB),
|
2002-06-25 15:56:27 +00:00
|
|
|
"Only PHI nodes may reference their own value!", &I);
|
2002-04-18 20:37:37 +00:00
|
|
|
}
|
|
|
|
|
2002-07-18 00:13:42 +00:00
|
|
|
// Check that void typed values don't have names
|
2002-06-25 15:56:27 +00:00
|
|
|
Assert1(I.getType() != Type::VoidTy || !I.hasName(),
|
|
|
|
"Instruction has a name, but provides a void value!", &I);
|
2002-07-18 00:13:42 +00:00
|
|
|
|
2004-03-29 00:29:36 +00:00
|
|
|
// Check that the return value of the instruction is either void or a legal
|
|
|
|
// value type.
|
|
|
|
Assert1(I.getType() == Type::VoidTy || I.getType()->isFirstClassType(),
|
|
|
|
"Instruction returns a non-scalar type!", &I);
|
|
|
|
|
2003-10-05 17:44:18 +00:00
|
|
|
// Check that all uses of the instruction, if they are instructions
|
|
|
|
// themselves, actually have parent basic blocks. If the use is not an
|
|
|
|
// instruction, it is an error!
|
2002-07-18 00:13:42 +00:00
|
|
|
for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
|
|
|
|
UI != UE; ++UI) {
|
2003-10-05 17:44:18 +00:00
|
|
|
Assert1(isa<Instruction>(*UI), "Use of instruction is not an instruction!",
|
|
|
|
*UI);
|
|
|
|
Instruction *Used = cast<Instruction>(*UI);
|
|
|
|
Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
|
|
|
|
" embeded in a basic block!", &I, Used);
|
2002-07-18 00:13:42 +00:00
|
|
|
}
|
2003-05-08 03:47:33 +00:00
|
|
|
|
2003-10-05 17:44:18 +00:00
|
|
|
for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
|
|
|
|
// Check to make sure that the "address of" an intrinsic function is never
|
|
|
|
// taken.
|
2004-03-14 03:23:54 +00:00
|
|
|
if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
|
2003-05-08 03:47:33 +00:00
|
|
|
Assert1(!F->isIntrinsic() || (i == 0 && isa<CallInst>(I)),
|
|
|
|
"Cannot take the address of an intrinsic!", &I);
|
2004-03-14 03:23:54 +00:00
|
|
|
} else if (BasicBlock *OpBB = dyn_cast<BasicBlock>(I.getOperand(i))) {
|
|
|
|
Assert1(OpBB->getParent() == BB->getParent(),
|
|
|
|
"Referring to a basic block in another function!", &I);
|
|
|
|
} else if (Argument *OpArg = dyn_cast<Argument>(I.getOperand(i))) {
|
|
|
|
Assert1(OpArg->getParent() == BB->getParent(),
|
|
|
|
"Referring to an argument in another function!", &I);
|
|
|
|
} else if (Instruction *Op = dyn_cast<Instruction>(I.getOperand(i))) {
|
2004-01-14 04:25:59 +00:00
|
|
|
BasicBlock *OpBlock = Op->getParent();
|
|
|
|
|
2003-10-05 17:44:18 +00:00
|
|
|
// Check that a definition dominates all of its uses.
|
|
|
|
if (!isa<PHINode>(I)) {
|
2004-01-14 05:42:52 +00:00
|
|
|
// Invoke results are only usable in the normal destination, not in the
|
|
|
|
// exceptional destination.
|
|
|
|
if (InvokeInst *II = dyn_cast<InvokeInst>(Op))
|
|
|
|
OpBlock = II->getNormalDest();
|
|
|
|
|
2003-10-05 17:44:18 +00:00
|
|
|
// Definition must dominate use unless use is unreachable!
|
2004-01-14 04:25:59 +00:00
|
|
|
Assert2(DS->dominates(OpBlock, BB) ||
|
2003-10-05 17:44:18 +00:00
|
|
|
!DS->dominates(&BB->getParent()->getEntryBlock(), BB),
|
|
|
|
"Instruction does not dominate all uses!", Op, &I);
|
|
|
|
} else {
|
|
|
|
// PHI nodes are more difficult than other nodes because they actually
|
|
|
|
// "use" the value in the predecessor basic blocks they correspond to.
|
|
|
|
BasicBlock *PredBB = cast<BasicBlock>(I.getOperand(i+1));
|
2004-01-14 04:25:59 +00:00
|
|
|
Assert2(DS->dominates(OpBlock, PredBB) ||
|
2003-10-05 17:44:18 +00:00
|
|
|
!DS->dominates(&BB->getParent()->getEntryBlock(), PredBB),
|
|
|
|
"Instruction does not dominate all uses!", Op, &I);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2003-05-08 03:47:33 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
|
2004-03-02 00:22:19 +00:00
|
|
|
///
|
2003-11-11 22:41:34 +00:00
|
|
|
void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
|
2003-05-08 03:47:33 +00:00
|
|
|
Function *IF = CI.getCalledFunction();
|
|
|
|
const FunctionType *FT = IF->getFunctionType();
|
|
|
|
Assert1(IF->isExternal(), "Intrinsic functions should never be defined!", IF);
|
2003-06-05 21:01:26 +00:00
|
|
|
unsigned NumArgs = 0;
|
2003-05-08 03:47:33 +00:00
|
|
|
|
2003-08-24 05:30:29 +00:00
|
|
|
// FIXME: this should check the return type of each intrinsic as well, also
|
|
|
|
// arguments!
|
2003-05-08 03:47:33 +00:00
|
|
|
switch (ID) {
|
2004-03-13 00:24:00 +00:00
|
|
|
case Intrinsic::vastart:
|
2003-05-08 15:55:31 +00:00
|
|
|
Assert1(CI.getParent()->getParent()->getFunctionType()->isVarArg(),
|
|
|
|
"llvm.va_start intrinsic may only occur in function with variable"
|
|
|
|
" args!", &CI);
|
2003-10-18 05:57:43 +00:00
|
|
|
NumArgs = 0;
|
2003-05-08 03:47:33 +00:00
|
|
|
break;
|
2004-03-13 00:24:00 +00:00
|
|
|
case Intrinsic::vaend: NumArgs = 1; break;
|
|
|
|
case Intrinsic::vacopy: NumArgs = 1; break;
|
2003-08-24 05:30:29 +00:00
|
|
|
|
2004-02-14 02:47:17 +00:00
|
|
|
case Intrinsic::returnaddress:
|
|
|
|
case Intrinsic::frameaddress:
|
|
|
|
Assert1(isa<PointerType>(FT->getReturnType()),
|
|
|
|
"llvm.(frame|return)address must return pointers", IF);
|
|
|
|
Assert1(FT->getNumParams() == 1 && isa<ConstantInt>(CI.getOperand(1)),
|
|
|
|
"llvm.(frame|return)address require a single constant integer argument",
|
|
|
|
&CI);
|
|
|
|
NumArgs = 1;
|
|
|
|
break;
|
|
|
|
|
2003-11-11 22:41:34 +00:00
|
|
|
case Intrinsic::setjmp: NumArgs = 1; break;
|
|
|
|
case Intrinsic::longjmp: NumArgs = 2; break;
|
|
|
|
case Intrinsic::sigsetjmp: NumArgs = 2; break;
|
|
|
|
case Intrinsic::siglongjmp: NumArgs = 2; break;
|
2004-01-05 05:36:30 +00:00
|
|
|
|
|
|
|
case Intrinsic::dbg_stoppoint: NumArgs = 4; break;
|
|
|
|
case Intrinsic::dbg_region_start:NumArgs = 1; break;
|
|
|
|
case Intrinsic::dbg_region_end: NumArgs = 1; break;
|
|
|
|
case Intrinsic::dbg_func_start: NumArgs = 1; break;
|
2004-01-06 05:33:02 +00:00
|
|
|
case Intrinsic::dbg_declare: NumArgs = 1; break;
|
2004-02-12 17:01:09 +00:00
|
|
|
|
|
|
|
case Intrinsic::memcpy: NumArgs = 4; break;
|
2004-02-12 18:11:20 +00:00
|
|
|
case Intrinsic::memmove: NumArgs = 4; break;
|
2004-02-14 02:47:17 +00:00
|
|
|
case Intrinsic::memset: NumArgs = 4; break;
|
2003-07-28 21:20:57 +00:00
|
|
|
|
2003-11-11 22:41:34 +00:00
|
|
|
case Intrinsic::alpha_ctlz: NumArgs = 1; break;
|
|
|
|
case Intrinsic::alpha_cttz: NumArgs = 1; break;
|
|
|
|
case Intrinsic::alpha_ctpop: NumArgs = 1; break;
|
|
|
|
case Intrinsic::alpha_umulh: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_vecop: NumArgs = 4; break;
|
|
|
|
case Intrinsic::alpha_pup: NumArgs = 3; break;
|
|
|
|
case Intrinsic::alpha_bytezap: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_bytemanip: NumArgs = 3; break;
|
|
|
|
case Intrinsic::alpha_dfpbop: NumArgs = 3; break;
|
|
|
|
case Intrinsic::alpha_dfpuop: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_unordered: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_uqtodfp: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_uqtosfp: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_dfptosq: NumArgs = 2; break;
|
|
|
|
case Intrinsic::alpha_sfptosq: NumArgs = 2; break;
|
|
|
|
|
|
|
|
case Intrinsic::not_intrinsic:
|
2003-05-08 03:47:33 +00:00
|
|
|
assert(0 && "Invalid intrinsic!"); NumArgs = 0; break;
|
|
|
|
}
|
|
|
|
|
|
|
|
Assert1(FT->getNumParams() == NumArgs || (FT->getNumParams() < NumArgs &&
|
|
|
|
FT->isVarArg()),
|
|
|
|
"Illegal # arguments for intrinsic function!", IF);
|
2002-04-18 20:37:37 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Implement the public interfaces to this file...
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
|
2004-04-02 15:45:08 +00:00
|
|
|
FunctionPass *llvm::createVerifierPass(VerifierFailureAction action) {
|
|
|
|
return new Verifier(action);
|
2002-04-18 20:37:37 +00:00
|
|
|
}
|
|
|
|
|
2002-08-02 17:37:08 +00:00
|
|
|
|
|
|
|
// verifyFunction - Create
|
2004-04-02 15:45:08 +00:00
|
|
|
bool llvm::verifyFunction(const Function &f, VerifierFailureAction action) {
|
2004-03-14 03:16:15 +00:00
|
|
|
Function &F = const_cast<Function&>(f);
|
2002-08-02 17:37:08 +00:00
|
|
|
assert(!F.isExternal() && "Cannot verify external functions");
|
2004-03-14 03:16:15 +00:00
|
|
|
|
|
|
|
FunctionPassManager FPM(new ExistingModuleProvider(F.getParent()));
|
2004-04-02 15:45:08 +00:00
|
|
|
Verifier *V = new Verifier(action);
|
2004-03-14 03:16:15 +00:00
|
|
|
FPM.add(V);
|
|
|
|
FPM.run(F);
|
|
|
|
return V->Broken;
|
2002-02-20 17:55:43 +00:00
|
|
|
}
|
|
|
|
|
2004-03-02 00:22:19 +00:00
|
|
|
/// verifyModule - Check a module for errors, printing messages on stderr.
|
|
|
|
/// Return true if the module is corrupt.
|
|
|
|
///
|
2004-04-02 15:45:08 +00:00
|
|
|
bool llvm::verifyModule(const Module &M, VerifierFailureAction action) {
|
2002-08-02 17:37:08 +00:00
|
|
|
PassManager PM;
|
2004-04-02 15:45:08 +00:00
|
|
|
Verifier *V = new Verifier(action);
|
2002-08-02 17:37:08 +00:00
|
|
|
PM.add(V);
|
|
|
|
PM.run((Module&)M);
|
|
|
|
return V->Broken;
|
2001-06-06 20:29:01 +00:00
|
|
|
}
|