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An alias is always in the section of its aliasee and has the same alignment (since it has the same address). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@201354 91177308-0d34-0410-b5e6-96231b3b80d8
2446 lines
93 KiB
C++
2446 lines
93 KiB
C++
//===-- Verifier.cpp - Implement the Module Verifier -----------------------==//
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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 file defines the function verifier interface, that can be used for some
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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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// * Both of a binary operator's parameters are of the same type
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// * Verify that the indices of mem access instructions match other operands
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// * Verify that arithmetic and other things are only performed on first-class
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// types. Verify that shifts & logicals only happen on integrals f.e.
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// * All of the constants in a switch statement are of the correct type
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// * The code is in valid SSA form
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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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// * Only phi nodes can be self referential: 'add i32 %0, %0 ; <int>:0' is bad
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// * PHI nodes must have an entry for each predecessor, with no extras.
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// * PHI nodes must be the first thing in a basic block, all grouped together
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// * PHI nodes must have at least one entry
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// * All basic blocks should only end with terminator insts, not contain them
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// * The entry node to a function must not have predecessors
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// * All Instructions must be embedded into a basic block
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// * Functions cannot take a void-typed parameter
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// * Verify that a function's argument list agrees with it's declared type.
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// * It is illegal to specify a name for a void value.
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// * It is illegal to have a internal global value with no initializer
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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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// * Function call argument types match the function prototype
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// * A landing pad is defined by a landingpad instruction, and can be jumped to
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// only by the unwind edge of an invoke instruction.
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// * A landingpad instruction must be the first non-PHI instruction in the
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// block.
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// * All landingpad instructions must use the same personality function with
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// the same function.
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// * All other things that are tested by asserts spread about the code...
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/Verifier.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/SetVector.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/DebugInfo.h"
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#include "llvm/IR/CallingConv.h"
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#include "llvm/IR/Constants.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DerivedTypes.h"
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#include "llvm/IR/Dominators.h"
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#include "llvm/IR/InlineAsm.h"
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#include "llvm/IR/IntrinsicInst.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/PassManager.h"
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#include "llvm/InstVisitor.h"
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#include "llvm/Pass.h"
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#include "llvm/Support/CFG.h"
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#include "llvm/Support/CallSite.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/ConstantRange.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cstdarg>
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using namespace llvm;
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static cl::opt<bool> DisableDebugInfoVerifier("disable-debug-info-verifier",
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cl::init(true));
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namespace {
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class Verifier : public InstVisitor<Verifier> {
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friend class InstVisitor<Verifier>;
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raw_ostream &OS;
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const Module *M;
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LLVMContext *Context;
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const DataLayout *DL;
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DominatorTree DT;
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/// \brief When verifying a basic block, keep track of all of the
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/// instructions we have seen so far.
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///
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/// This allows us to do efficient dominance checks for the case when an
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/// instruction has an operand that is an instruction in the same block.
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SmallPtrSet<Instruction *, 16> InstsInThisBlock;
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/// \brief Keep track of the metadata nodes that have been checked already.
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SmallPtrSet<MDNode *, 32> MDNodes;
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/// \brief The personality function referenced by the LandingPadInsts.
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/// All LandingPadInsts within the same function must use the same
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/// personality function.
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const Value *PersonalityFn;
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/// \brief Finder keeps track of all debug info MDNodes in a Module.
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DebugInfoFinder Finder;
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/// \brief Track the brokenness of the module while recursively visiting.
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bool Broken;
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public:
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explicit Verifier(raw_ostream &OS = dbgs())
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: OS(OS), M(0), Context(0), DL(0), PersonalityFn(0), Broken(false) {}
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bool verify(const Function &F) {
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M = F.getParent();
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Context = &M->getContext();
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// First ensure the function is well-enough formed to compute dominance
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// information.
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if (F.empty()) {
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OS << "Function '" << F.getName()
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<< "' does not contain an entry block!\n";
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return false;
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}
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for (Function::const_iterator I = F.begin(), E = F.end(); I != E; ++I) {
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if (I->empty() || !I->back().isTerminator()) {
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OS << "Basic Block in function '" << F.getName()
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<< "' does not have terminator!\n";
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I->printAsOperand(OS, true);
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OS << "\n";
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return false;
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}
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}
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// Now directly compute a dominance tree. We don't rely on the pass
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// manager to provide this as it isolates us from a potentially
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// out-of-date dominator tree and makes it significantly more complex to
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// run this code outside of a pass manager.
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// FIXME: It's really gross that we have to cast away constness here.
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DT.recalculate(const_cast<Function &>(F));
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Finder.reset();
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Broken = false;
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// FIXME: We strip const here because the inst visitor strips const.
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visit(const_cast<Function &>(F));
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InstsInThisBlock.clear();
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PersonalityFn = 0;
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if (!DisableDebugInfoVerifier)
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// Verify Debug Info.
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verifyDebugInfo();
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return !Broken;
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}
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bool verify(const Module &M) {
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this->M = &M;
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Context = &M.getContext();
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Finder.reset();
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Broken = false;
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// Scan through, checking all of the external function's linkage now...
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for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
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visitGlobalValue(*I);
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// Check to make sure function prototypes are okay.
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if (I->isDeclaration())
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visitFunction(*I);
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}
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for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
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I != E; ++I)
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visitGlobalVariable(*I);
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for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
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I != E; ++I)
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visitGlobalAlias(*I);
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for (Module::const_named_metadata_iterator I = M.named_metadata_begin(),
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E = M.named_metadata_end();
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I != E; ++I)
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visitNamedMDNode(*I);
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visitModuleFlags(M);
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visitModuleIdents(M);
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if (!DisableDebugInfoVerifier) {
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Finder.reset();
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Finder.processModule(M);
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// Verify Debug Info.
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verifyDebugInfo();
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}
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return !Broken;
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}
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private:
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// Verification methods...
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void visitGlobalValue(const GlobalValue &GV);
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void visitGlobalVariable(const GlobalVariable &GV);
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void visitGlobalAlias(const GlobalAlias &GA);
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void visitNamedMDNode(const NamedMDNode &NMD);
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void visitMDNode(MDNode &MD, Function *F);
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void visitModuleIdents(const Module &M);
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void visitModuleFlags(const Module &M);
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void visitModuleFlag(const MDNode *Op,
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DenseMap<const MDString *, const MDNode *> &SeenIDs,
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SmallVectorImpl<const MDNode *> &Requirements);
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void visitFunction(const Function &F);
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void visitBasicBlock(BasicBlock &BB);
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// InstVisitor overrides...
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using InstVisitor<Verifier>::visit;
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void visit(Instruction &I);
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void visitTruncInst(TruncInst &I);
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void visitZExtInst(ZExtInst &I);
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void visitSExtInst(SExtInst &I);
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void visitFPTruncInst(FPTruncInst &I);
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void visitFPExtInst(FPExtInst &I);
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void visitFPToUIInst(FPToUIInst &I);
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void visitFPToSIInst(FPToSIInst &I);
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void visitUIToFPInst(UIToFPInst &I);
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void visitSIToFPInst(SIToFPInst &I);
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void visitIntToPtrInst(IntToPtrInst &I);
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void visitPtrToIntInst(PtrToIntInst &I);
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void visitBitCastInst(BitCastInst &I);
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void visitAddrSpaceCastInst(AddrSpaceCastInst &I);
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void visitPHINode(PHINode &PN);
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void visitBinaryOperator(BinaryOperator &B);
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void visitICmpInst(ICmpInst &IC);
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void visitFCmpInst(FCmpInst &FC);
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void visitExtractElementInst(ExtractElementInst &EI);
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void visitInsertElementInst(InsertElementInst &EI);
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void visitShuffleVectorInst(ShuffleVectorInst &EI);
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void visitVAArgInst(VAArgInst &VAA) { visitInstruction(VAA); }
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void visitCallInst(CallInst &CI);
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void visitInvokeInst(InvokeInst &II);
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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 verifyDominatesUse(Instruction &I, unsigned i);
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void visitInstruction(Instruction &I);
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void visitTerminatorInst(TerminatorInst &I);
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void visitBranchInst(BranchInst &BI);
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void visitReturnInst(ReturnInst &RI);
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void visitSwitchInst(SwitchInst &SI);
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void visitIndirectBrInst(IndirectBrInst &BI);
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void visitSelectInst(SelectInst &SI);
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void visitUserOp1(Instruction &I);
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void visitUserOp2(Instruction &I) { visitUserOp1(I); }
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void visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI);
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void visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI);
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void visitAtomicRMWInst(AtomicRMWInst &RMWI);
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void visitFenceInst(FenceInst &FI);
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void visitAllocaInst(AllocaInst &AI);
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void visitExtractValueInst(ExtractValueInst &EVI);
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void visitInsertValueInst(InsertValueInst &IVI);
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void visitLandingPadInst(LandingPadInst &LPI);
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void VerifyCallSite(CallSite CS);
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bool PerformTypeCheck(Intrinsic::ID ID, Function *F, Type *Ty, int VT,
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unsigned ArgNo, std::string &Suffix);
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bool VerifyIntrinsicType(Type *Ty, ArrayRef<Intrinsic::IITDescriptor> &Infos,
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SmallVectorImpl<Type *> &ArgTys);
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bool VerifyIntrinsicIsVarArg(bool isVarArg,
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ArrayRef<Intrinsic::IITDescriptor> &Infos);
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bool VerifyAttributeCount(AttributeSet Attrs, unsigned Params);
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void VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx, bool isFunction,
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const Value *V);
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void VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
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bool isReturnValue, const Value *V);
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void VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
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const Value *V);
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void VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy);
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void VerifyConstantExprBitcastType(const ConstantExpr *CE);
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void verifyDebugInfo();
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void WriteValue(const Value *V) {
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if (!V)
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return;
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if (isa<Instruction>(V)) {
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OS << *V << '\n';
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} else {
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V->printAsOperand(OS, true, M);
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OS << '\n';
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}
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}
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void WriteType(Type *T) {
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if (!T)
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return;
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OS << ' ' << *T;
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}
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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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void CheckFailed(const Twine &Message, const Value *V1 = 0,
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const Value *V2 = 0, const Value *V3 = 0,
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const Value *V4 = 0) {
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OS << Message.str() << "\n";
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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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Broken = true;
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}
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void CheckFailed(const Twine &Message, const Value *V1, Type *T2,
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const Value *V3 = 0) {
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OS << Message.str() << "\n";
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WriteValue(V1);
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WriteType(T2);
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WriteValue(V3);
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Broken = true;
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}
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void CheckFailed(const Twine &Message, Type *T1, Type *T2 = 0, Type *T3 = 0) {
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OS << Message.str() << "\n";
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WriteType(T1);
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WriteType(T2);
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WriteType(T3);
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Broken = true;
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}
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};
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} // End anonymous namespace
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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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do { if (!(C)) { CheckFailed(M); return; } } while (0)
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#define Assert1(C, M, V1) \
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do { if (!(C)) { CheckFailed(M, V1); return; } } while (0)
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#define Assert2(C, M, V1, V2) \
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do { if (!(C)) { CheckFailed(M, V1, V2); return; } } while (0)
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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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void Verifier::visit(Instruction &I) {
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for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i)
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Assert1(I.getOperand(i) != 0, "Operand is null", &I);
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InstVisitor<Verifier>::visit(I);
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}
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void Verifier::visitGlobalValue(const GlobalValue &GV) {
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Assert1(!GV.isDeclaration() ||
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GV.isMaterializable() ||
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GV.hasExternalLinkage() ||
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GV.hasExternalWeakLinkage() ||
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(isa<GlobalAlias>(GV) &&
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(GV.hasLocalLinkage() || GV.hasWeakLinkage())),
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"Global is external, but doesn't have external or weak linkage!",
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&GV);
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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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const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
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Assert1(GVar && GVar->getType()->getElementType()->isArrayTy(),
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"Only global arrays can have appending linkage!", GVar);
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}
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}
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void Verifier::visitGlobalVariable(const GlobalVariable &GV) {
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if (GV.hasInitializer()) {
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Assert1(GV.getInitializer()->getType() == GV.getType()->getElementType(),
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"Global variable initializer type does not match global "
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"variable type!", &GV);
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// If the global has common linkage, it must have a zero initializer and
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// cannot be constant.
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if (GV.hasCommonLinkage()) {
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Assert1(GV.getInitializer()->isNullValue(),
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"'common' global must have a zero initializer!", &GV);
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Assert1(!GV.isConstant(), "'common' global may not be marked constant!",
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&GV);
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}
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} else {
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Assert1(GV.hasExternalLinkage() || GV.hasExternalWeakLinkage(),
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"invalid linkage type for global declaration", &GV);
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}
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if (GV.hasName() && (GV.getName() == "llvm.global_ctors" ||
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GV.getName() == "llvm.global_dtors")) {
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Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
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"invalid linkage for intrinsic global variable", &GV);
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// Don't worry about emitting an error for it not being an array,
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// visitGlobalValue will complain on appending non-array.
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if (ArrayType *ATy = dyn_cast<ArrayType>(GV.getType())) {
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StructType *STy = dyn_cast<StructType>(ATy->getElementType());
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PointerType *FuncPtrTy =
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FunctionType::get(Type::getVoidTy(*Context), false)->getPointerTo();
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Assert1(STy && STy->getNumElements() == 2 &&
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STy->getTypeAtIndex(0u)->isIntegerTy(32) &&
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STy->getTypeAtIndex(1) == FuncPtrTy,
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"wrong type for intrinsic global variable", &GV);
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}
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}
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if (GV.hasName() && (GV.getName() == "llvm.used" ||
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GV.getName() == "llvm.compiler.used")) {
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Assert1(!GV.hasInitializer() || GV.hasAppendingLinkage(),
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"invalid linkage for intrinsic global variable", &GV);
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Type *GVType = GV.getType()->getElementType();
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if (ArrayType *ATy = dyn_cast<ArrayType>(GVType)) {
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PointerType *PTy = dyn_cast<PointerType>(ATy->getElementType());
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Assert1(PTy, "wrong type for intrinsic global variable", &GV);
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if (GV.hasInitializer()) {
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const Constant *Init = GV.getInitializer();
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const ConstantArray *InitArray = dyn_cast<ConstantArray>(Init);
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Assert1(InitArray, "wrong initalizer for intrinsic global variable",
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Init);
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for (unsigned i = 0, e = InitArray->getNumOperands(); i != e; ++i) {
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Value *V = Init->getOperand(i)->stripPointerCastsNoFollowAliases();
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Assert1(
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isa<GlobalVariable>(V) || isa<Function>(V) || isa<GlobalAlias>(V),
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"invalid llvm.used member", V);
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Assert1(V->hasName(), "members of llvm.used must be named", V);
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}
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}
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}
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}
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Assert1(!GV.hasDLLImportStorageClass() ||
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(GV.isDeclaration() && GV.hasExternalLinkage()) ||
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GV.hasAvailableExternallyLinkage(),
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"Global is marked as dllimport, but not external", &GV);
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if (!GV.hasInitializer()) {
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visitGlobalValue(GV);
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return;
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}
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// Walk any aggregate initializers looking for bitcasts between address spaces
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SmallPtrSet<const Value *, 4> Visited;
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SmallVector<const Value *, 4> WorkStack;
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WorkStack.push_back(cast<Value>(GV.getInitializer()));
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while (!WorkStack.empty()) {
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const Value *V = WorkStack.pop_back_val();
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if (!Visited.insert(V))
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continue;
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if (const User *U = dyn_cast<User>(V)) {
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|
for (unsigned I = 0, N = U->getNumOperands(); I != N; ++I)
|
|
WorkStack.push_back(U->getOperand(I));
|
|
}
|
|
|
|
if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
|
|
VerifyConstantExprBitcastType(CE);
|
|
if (Broken)
|
|
return;
|
|
}
|
|
}
|
|
|
|
visitGlobalValue(GV);
|
|
}
|
|
|
|
void Verifier::visitGlobalAlias(const GlobalAlias &GA) {
|
|
Assert1(!GA.getName().empty(),
|
|
"Alias name cannot be empty!", &GA);
|
|
Assert1(GlobalAlias::isValidLinkage(GA.getLinkage()),
|
|
"Alias should have external or external weak linkage!", &GA);
|
|
Assert1(GA.getAliasee(),
|
|
"Aliasee cannot be NULL!", &GA);
|
|
Assert1(GA.getType() == GA.getAliasee()->getType(),
|
|
"Alias and aliasee types should match!", &GA);
|
|
Assert1(!GA.hasUnnamedAddr(), "Alias cannot have unnamed_addr!", &GA);
|
|
Assert1(!GA.hasSection(), "Alias cannot have a section!", &GA);
|
|
Assert1(!GA.getAlignment(), "Alias connot have an alignment", &GA);
|
|
|
|
const Constant *Aliasee = GA.getAliasee();
|
|
|
|
if (!isa<GlobalValue>(Aliasee)) {
|
|
const ConstantExpr *CE = dyn_cast<ConstantExpr>(Aliasee);
|
|
Assert1(CE &&
|
|
(CE->getOpcode() == Instruction::BitCast ||
|
|
CE->getOpcode() == Instruction::AddrSpaceCast ||
|
|
CE->getOpcode() == Instruction::GetElementPtr) &&
|
|
isa<GlobalValue>(CE->getOperand(0)),
|
|
"Aliasee should be either GlobalValue, bitcast or "
|
|
"addrspacecast of GlobalValue",
|
|
&GA);
|
|
|
|
if (CE->getOpcode() == Instruction::BitCast) {
|
|
unsigned SrcAS = CE->getOperand(0)->getType()->getPointerAddressSpace();
|
|
unsigned DstAS = CE->getType()->getPointerAddressSpace();
|
|
|
|
Assert1(SrcAS == DstAS,
|
|
"Alias bitcasts cannot be between different address spaces",
|
|
&GA);
|
|
}
|
|
}
|
|
|
|
const GlobalValue* Resolved = GA.resolveAliasedGlobal(/*stopOnWeak*/ false);
|
|
Assert1(Resolved,
|
|
"Aliasing chain should end with function or global variable", &GA);
|
|
|
|
visitGlobalValue(GA);
|
|
}
|
|
|
|
void Verifier::visitNamedMDNode(const NamedMDNode &NMD) {
|
|
for (unsigned i = 0, e = NMD.getNumOperands(); i != e; ++i) {
|
|
MDNode *MD = NMD.getOperand(i);
|
|
if (!MD)
|
|
continue;
|
|
|
|
Assert1(!MD->isFunctionLocal(),
|
|
"Named metadata operand cannot be function local!", MD);
|
|
visitMDNode(*MD, 0);
|
|
}
|
|
}
|
|
|
|
void Verifier::visitMDNode(MDNode &MD, Function *F) {
|
|
// Only visit each node once. Metadata can be mutually recursive, so this
|
|
// avoids infinite recursion here, as well as being an optimization.
|
|
if (!MDNodes.insert(&MD))
|
|
return;
|
|
|
|
for (unsigned i = 0, e = MD.getNumOperands(); i != e; ++i) {
|
|
Value *Op = MD.getOperand(i);
|
|
if (!Op)
|
|
continue;
|
|
if (isa<Constant>(Op) || isa<MDString>(Op))
|
|
continue;
|
|
if (MDNode *N = dyn_cast<MDNode>(Op)) {
|
|
Assert2(MD.isFunctionLocal() || !N->isFunctionLocal(),
|
|
"Global metadata operand cannot be function local!", &MD, N);
|
|
visitMDNode(*N, F);
|
|
continue;
|
|
}
|
|
Assert2(MD.isFunctionLocal(), "Invalid operand for global metadata!", &MD, Op);
|
|
|
|
// If this was an instruction, bb, or argument, verify that it is in the
|
|
// function that we expect.
|
|
Function *ActualF = 0;
|
|
if (Instruction *I = dyn_cast<Instruction>(Op))
|
|
ActualF = I->getParent()->getParent();
|
|
else if (BasicBlock *BB = dyn_cast<BasicBlock>(Op))
|
|
ActualF = BB->getParent();
|
|
else if (Argument *A = dyn_cast<Argument>(Op))
|
|
ActualF = A->getParent();
|
|
assert(ActualF && "Unimplemented function local metadata case!");
|
|
|
|
Assert2(ActualF == F, "function-local metadata used in wrong function",
|
|
&MD, Op);
|
|
}
|
|
}
|
|
|
|
void Verifier::visitModuleIdents(const Module &M) {
|
|
const NamedMDNode *Idents = M.getNamedMetadata("llvm.ident");
|
|
if (!Idents)
|
|
return;
|
|
|
|
// llvm.ident takes a list of metadata entry. Each entry has only one string.
|
|
// Scan each llvm.ident entry and make sure that this requirement is met.
|
|
for (unsigned i = 0, e = Idents->getNumOperands(); i != e; ++i) {
|
|
const MDNode *N = Idents->getOperand(i);
|
|
Assert1(N->getNumOperands() == 1,
|
|
"incorrect number of operands in llvm.ident metadata", N);
|
|
Assert1(isa<MDString>(N->getOperand(0)),
|
|
("invalid value for llvm.ident metadata entry operand"
|
|
"(the operand should be a string)"),
|
|
N->getOperand(0));
|
|
}
|
|
}
|
|
|
|
void Verifier::visitModuleFlags(const Module &M) {
|
|
const NamedMDNode *Flags = M.getModuleFlagsMetadata();
|
|
if (!Flags) return;
|
|
|
|
// Scan each flag, and track the flags and requirements.
|
|
DenseMap<const MDString*, const MDNode*> SeenIDs;
|
|
SmallVector<const MDNode*, 16> Requirements;
|
|
for (unsigned I = 0, E = Flags->getNumOperands(); I != E; ++I) {
|
|
visitModuleFlag(Flags->getOperand(I), SeenIDs, Requirements);
|
|
}
|
|
|
|
// Validate that the requirements in the module are valid.
|
|
for (unsigned I = 0, E = Requirements.size(); I != E; ++I) {
|
|
const MDNode *Requirement = Requirements[I];
|
|
const MDString *Flag = cast<MDString>(Requirement->getOperand(0));
|
|
const Value *ReqValue = Requirement->getOperand(1);
|
|
|
|
const MDNode *Op = SeenIDs.lookup(Flag);
|
|
if (!Op) {
|
|
CheckFailed("invalid requirement on flag, flag is not present in module",
|
|
Flag);
|
|
continue;
|
|
}
|
|
|
|
if (Op->getOperand(2) != ReqValue) {
|
|
CheckFailed(("invalid requirement on flag, "
|
|
"flag does not have the required value"),
|
|
Flag);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
Verifier::visitModuleFlag(const MDNode *Op,
|
|
DenseMap<const MDString *, const MDNode *> &SeenIDs,
|
|
SmallVectorImpl<const MDNode *> &Requirements) {
|
|
// Each module flag should have three arguments, the merge behavior (a
|
|
// constant int), the flag ID (an MDString), and the value.
|
|
Assert1(Op->getNumOperands() == 3,
|
|
"incorrect number of operands in module flag", Op);
|
|
ConstantInt *Behavior = dyn_cast<ConstantInt>(Op->getOperand(0));
|
|
MDString *ID = dyn_cast<MDString>(Op->getOperand(1));
|
|
Assert1(Behavior,
|
|
"invalid behavior operand in module flag (expected constant integer)",
|
|
Op->getOperand(0));
|
|
unsigned BehaviorValue = Behavior->getZExtValue();
|
|
Assert1(ID,
|
|
"invalid ID operand in module flag (expected metadata string)",
|
|
Op->getOperand(1));
|
|
|
|
// Sanity check the values for behaviors with additional requirements.
|
|
switch (BehaviorValue) {
|
|
default:
|
|
Assert1(false,
|
|
"invalid behavior operand in module flag (unexpected constant)",
|
|
Op->getOperand(0));
|
|
break;
|
|
|
|
case Module::Error:
|
|
case Module::Warning:
|
|
case Module::Override:
|
|
// These behavior types accept any value.
|
|
break;
|
|
|
|
case Module::Require: {
|
|
// The value should itself be an MDNode with two operands, a flag ID (an
|
|
// MDString), and a value.
|
|
MDNode *Value = dyn_cast<MDNode>(Op->getOperand(2));
|
|
Assert1(Value && Value->getNumOperands() == 2,
|
|
"invalid value for 'require' module flag (expected metadata pair)",
|
|
Op->getOperand(2));
|
|
Assert1(isa<MDString>(Value->getOperand(0)),
|
|
("invalid value for 'require' module flag "
|
|
"(first value operand should be a string)"),
|
|
Value->getOperand(0));
|
|
|
|
// Append it to the list of requirements, to check once all module flags are
|
|
// scanned.
|
|
Requirements.push_back(Value);
|
|
break;
|
|
}
|
|
|
|
case Module::Append:
|
|
case Module::AppendUnique: {
|
|
// These behavior types require the operand be an MDNode.
|
|
Assert1(isa<MDNode>(Op->getOperand(2)),
|
|
"invalid value for 'append'-type module flag "
|
|
"(expected a metadata node)", Op->getOperand(2));
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Unless this is a "requires" flag, check the ID is unique.
|
|
if (BehaviorValue != Module::Require) {
|
|
bool Inserted = SeenIDs.insert(std::make_pair(ID, Op)).second;
|
|
Assert1(Inserted,
|
|
"module flag identifiers must be unique (or of 'require' type)",
|
|
ID);
|
|
}
|
|
}
|
|
|
|
void Verifier::VerifyAttributeTypes(AttributeSet Attrs, unsigned Idx,
|
|
bool isFunction, const Value *V) {
|
|
unsigned Slot = ~0U;
|
|
for (unsigned I = 0, E = Attrs.getNumSlots(); I != E; ++I)
|
|
if (Attrs.getSlotIndex(I) == Idx) {
|
|
Slot = I;
|
|
break;
|
|
}
|
|
|
|
assert(Slot != ~0U && "Attribute set inconsistency!");
|
|
|
|
for (AttributeSet::iterator I = Attrs.begin(Slot), E = Attrs.end(Slot);
|
|
I != E; ++I) {
|
|
if (I->isStringAttribute())
|
|
continue;
|
|
|
|
if (I->getKindAsEnum() == Attribute::NoReturn ||
|
|
I->getKindAsEnum() == Attribute::NoUnwind ||
|
|
I->getKindAsEnum() == Attribute::NoInline ||
|
|
I->getKindAsEnum() == Attribute::AlwaysInline ||
|
|
I->getKindAsEnum() == Attribute::OptimizeForSize ||
|
|
I->getKindAsEnum() == Attribute::StackProtect ||
|
|
I->getKindAsEnum() == Attribute::StackProtectReq ||
|
|
I->getKindAsEnum() == Attribute::StackProtectStrong ||
|
|
I->getKindAsEnum() == Attribute::NoRedZone ||
|
|
I->getKindAsEnum() == Attribute::NoImplicitFloat ||
|
|
I->getKindAsEnum() == Attribute::Naked ||
|
|
I->getKindAsEnum() == Attribute::InlineHint ||
|
|
I->getKindAsEnum() == Attribute::StackAlignment ||
|
|
I->getKindAsEnum() == Attribute::UWTable ||
|
|
I->getKindAsEnum() == Attribute::NonLazyBind ||
|
|
I->getKindAsEnum() == Attribute::ReturnsTwice ||
|
|
I->getKindAsEnum() == Attribute::SanitizeAddress ||
|
|
I->getKindAsEnum() == Attribute::SanitizeThread ||
|
|
I->getKindAsEnum() == Attribute::SanitizeMemory ||
|
|
I->getKindAsEnum() == Attribute::MinSize ||
|
|
I->getKindAsEnum() == Attribute::NoDuplicate ||
|
|
I->getKindAsEnum() == Attribute::Builtin ||
|
|
I->getKindAsEnum() == Attribute::NoBuiltin ||
|
|
I->getKindAsEnum() == Attribute::Cold ||
|
|
I->getKindAsEnum() == Attribute::OptimizeNone) {
|
|
if (!isFunction) {
|
|
CheckFailed("Attribute '" + I->getAsString() +
|
|
"' only applies to functions!", V);
|
|
return;
|
|
}
|
|
} else if (I->getKindAsEnum() == Attribute::ReadOnly ||
|
|
I->getKindAsEnum() == Attribute::ReadNone) {
|
|
if (Idx == 0) {
|
|
CheckFailed("Attribute '" + I->getAsString() +
|
|
"' does not apply to function returns");
|
|
return;
|
|
}
|
|
} else if (isFunction) {
|
|
CheckFailed("Attribute '" + I->getAsString() +
|
|
"' does not apply to functions!", V);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
// VerifyParameterAttrs - Check the given attributes for an argument or return
|
|
// value of the specified type. The value V is printed in error messages.
|
|
void Verifier::VerifyParameterAttrs(AttributeSet Attrs, unsigned Idx, Type *Ty,
|
|
bool isReturnValue, const Value *V) {
|
|
if (!Attrs.hasAttributes(Idx))
|
|
return;
|
|
|
|
VerifyAttributeTypes(Attrs, Idx, false, V);
|
|
|
|
if (isReturnValue)
|
|
Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::Nest) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::StructRet) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::NoCapture) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::Returned) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::InAlloca),
|
|
"Attributes 'byval', 'inalloca', 'nest', 'sret', 'nocapture', and "
|
|
"'returned' do not apply to return values!", V);
|
|
|
|
// Check for mutually incompatible attributes. Only inreg is compatible with
|
|
// sret.
|
|
unsigned AttrCount = 0;
|
|
AttrCount += Attrs.hasAttribute(Idx, Attribute::ByVal);
|
|
AttrCount += Attrs.hasAttribute(Idx, Attribute::InAlloca);
|
|
AttrCount += Attrs.hasAttribute(Idx, Attribute::StructRet) ||
|
|
Attrs.hasAttribute(Idx, Attribute::InReg);
|
|
AttrCount += Attrs.hasAttribute(Idx, Attribute::Nest);
|
|
Assert1(AttrCount <= 1, "Attributes 'byval', 'inalloca', 'inreg', 'nest', "
|
|
"and 'sret' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(Idx, Attribute::InAlloca) &&
|
|
Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
|
|
"'inalloca and readonly' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(Idx, Attribute::StructRet) &&
|
|
Attrs.hasAttribute(Idx, Attribute::Returned)), "Attributes "
|
|
"'sret and returned' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(Idx, Attribute::ZExt) &&
|
|
Attrs.hasAttribute(Idx, Attribute::SExt)), "Attributes "
|
|
"'zeroext and signext' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(Idx, Attribute::ReadNone) &&
|
|
Attrs.hasAttribute(Idx, Attribute::ReadOnly)), "Attributes "
|
|
"'readnone and readonly' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(Idx, Attribute::NoInline) &&
|
|
Attrs.hasAttribute(Idx, Attribute::AlwaysInline)), "Attributes "
|
|
"'noinline and alwaysinline' are incompatible!", V);
|
|
|
|
Assert1(!AttrBuilder(Attrs, Idx).
|
|
hasAttributes(AttributeFuncs::typeIncompatible(Ty, Idx), Idx),
|
|
"Wrong types for attribute: " +
|
|
AttributeFuncs::typeIncompatible(Ty, Idx).getAsString(Idx), V);
|
|
|
|
if (PointerType *PTy = dyn_cast<PointerType>(Ty)) {
|
|
if (!PTy->getElementType()->isSized()) {
|
|
Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal) &&
|
|
!Attrs.hasAttribute(Idx, Attribute::InAlloca),
|
|
"Attributes 'byval' and 'inalloca' do not support unsized types!",
|
|
V);
|
|
}
|
|
} else {
|
|
Assert1(!Attrs.hasAttribute(Idx, Attribute::ByVal),
|
|
"Attribute 'byval' only applies to parameters with pointer type!",
|
|
V);
|
|
}
|
|
}
|
|
|
|
// VerifyFunctionAttrs - Check parameter attributes against a function type.
|
|
// The value V is printed in error messages.
|
|
void Verifier::VerifyFunctionAttrs(FunctionType *FT, AttributeSet Attrs,
|
|
const Value *V) {
|
|
if (Attrs.isEmpty())
|
|
return;
|
|
|
|
bool SawNest = false;
|
|
bool SawReturned = false;
|
|
|
|
for (unsigned i = 0, e = Attrs.getNumSlots(); i != e; ++i) {
|
|
unsigned Idx = Attrs.getSlotIndex(i);
|
|
|
|
Type *Ty;
|
|
if (Idx == 0)
|
|
Ty = FT->getReturnType();
|
|
else if (Idx-1 < FT->getNumParams())
|
|
Ty = FT->getParamType(Idx-1);
|
|
else
|
|
break; // VarArgs attributes, verified elsewhere.
|
|
|
|
VerifyParameterAttrs(Attrs, Idx, Ty, Idx == 0, V);
|
|
|
|
if (Idx == 0)
|
|
continue;
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
|
|
Assert1(!SawNest, "More than one parameter has attribute nest!", V);
|
|
SawNest = true;
|
|
}
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
|
|
Assert1(!SawReturned, "More than one parameter has attribute returned!",
|
|
V);
|
|
Assert1(Ty->canLosslesslyBitCastTo(FT->getReturnType()), "Incompatible "
|
|
"argument and return types for 'returned' attribute", V);
|
|
SawReturned = true;
|
|
}
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::StructRet))
|
|
Assert1(Idx == 1, "Attribute sret is not on first parameter!", V);
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::InAlloca)) {
|
|
Assert1(Idx == FT->getNumParams(),
|
|
"inalloca isn't on the last parameter!", V);
|
|
}
|
|
}
|
|
|
|
if (!Attrs.hasAttributes(AttributeSet::FunctionIndex))
|
|
return;
|
|
|
|
VerifyAttributeTypes(Attrs, AttributeSet::FunctionIndex, true, V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::ReadNone) &&
|
|
Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::ReadOnly)),
|
|
"Attributes 'readnone and readonly' are incompatible!", V);
|
|
|
|
Assert1(!(Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::NoInline) &&
|
|
Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::AlwaysInline)),
|
|
"Attributes 'noinline and alwaysinline' are incompatible!", V);
|
|
|
|
if (Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::OptimizeNone)) {
|
|
Assert1(Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::NoInline),
|
|
"Attribute 'optnone' requires 'noinline'!", V);
|
|
|
|
Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::OptimizeForSize),
|
|
"Attributes 'optsize and optnone' are incompatible!", V);
|
|
|
|
Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::MinSize),
|
|
"Attributes 'minsize and optnone' are incompatible!", V);
|
|
}
|
|
}
|
|
|
|
void Verifier::VerifyBitcastType(const Value *V, Type *DestTy, Type *SrcTy) {
|
|
// Get the size of the types in bits, we'll need this later
|
|
unsigned SrcBitSize = SrcTy->getPrimitiveSizeInBits();
|
|
unsigned DestBitSize = DestTy->getPrimitiveSizeInBits();
|
|
|
|
// BitCast implies a no-op cast of type only. No bits change.
|
|
// However, you can't cast pointers to anything but pointers.
|
|
Assert1(SrcTy->isPointerTy() == DestTy->isPointerTy(),
|
|
"Bitcast requires both operands to be pointer or neither", V);
|
|
Assert1(SrcBitSize == DestBitSize,
|
|
"Bitcast requires types of same width", V);
|
|
|
|
// Disallow aggregates.
|
|
Assert1(!SrcTy->isAggregateType(),
|
|
"Bitcast operand must not be aggregate", V);
|
|
Assert1(!DestTy->isAggregateType(),
|
|
"Bitcast type must not be aggregate", V);
|
|
|
|
// Without datalayout, assume all address spaces are the same size.
|
|
// Don't check if both types are not pointers.
|
|
// Skip casts between scalars and vectors.
|
|
if (!DL ||
|
|
!SrcTy->isPtrOrPtrVectorTy() ||
|
|
!DestTy->isPtrOrPtrVectorTy() ||
|
|
SrcTy->isVectorTy() != DestTy->isVectorTy()) {
|
|
return;
|
|
}
|
|
|
|
unsigned SrcAS = SrcTy->getPointerAddressSpace();
|
|
unsigned DstAS = DestTy->getPointerAddressSpace();
|
|
|
|
Assert1(SrcAS == DstAS,
|
|
"Bitcasts between pointers of different address spaces is not legal."
|
|
"Use AddrSpaceCast instead.", V);
|
|
}
|
|
|
|
void Verifier::VerifyConstantExprBitcastType(const ConstantExpr *CE) {
|
|
if (CE->getOpcode() == Instruction::BitCast) {
|
|
Type *SrcTy = CE->getOperand(0)->getType();
|
|
Type *DstTy = CE->getType();
|
|
VerifyBitcastType(CE, DstTy, SrcTy);
|
|
}
|
|
}
|
|
|
|
bool Verifier::VerifyAttributeCount(AttributeSet Attrs, unsigned Params) {
|
|
if (Attrs.getNumSlots() == 0)
|
|
return true;
|
|
|
|
unsigned LastSlot = Attrs.getNumSlots() - 1;
|
|
unsigned LastIndex = Attrs.getSlotIndex(LastSlot);
|
|
if (LastIndex <= Params
|
|
|| (LastIndex == AttributeSet::FunctionIndex
|
|
&& (LastSlot == 0 || Attrs.getSlotIndex(LastSlot - 1) <= Params)))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// visitFunction - Verify that a function is ok.
|
|
//
|
|
void Verifier::visitFunction(const Function &F) {
|
|
// Check function arguments.
|
|
FunctionType *FT = F.getFunctionType();
|
|
unsigned NumArgs = F.arg_size();
|
|
|
|
Assert1(Context == &F.getContext(),
|
|
"Function context does not match Module context!", &F);
|
|
|
|
Assert1(!F.hasCommonLinkage(), "Functions may not have common linkage", &F);
|
|
Assert2(FT->getNumParams() == NumArgs,
|
|
"# formal arguments must match # of arguments for function type!",
|
|
&F, FT);
|
|
Assert1(F.getReturnType()->isFirstClassType() ||
|
|
F.getReturnType()->isVoidTy() ||
|
|
F.getReturnType()->isStructTy(),
|
|
"Functions cannot return aggregate values!", &F);
|
|
|
|
Assert1(!F.hasStructRetAttr() || F.getReturnType()->isVoidTy(),
|
|
"Invalid struct return type!", &F);
|
|
|
|
AttributeSet Attrs = F.getAttributes();
|
|
|
|
Assert1(VerifyAttributeCount(Attrs, FT->getNumParams()),
|
|
"Attribute after last parameter!", &F);
|
|
|
|
// Check function attributes.
|
|
VerifyFunctionAttrs(FT, Attrs, &F);
|
|
|
|
// On function declarations/definitions, we do not support the builtin
|
|
// attribute. We do not check this in VerifyFunctionAttrs since that is
|
|
// checking for Attributes that can/can not ever be on functions.
|
|
Assert1(!Attrs.hasAttribute(AttributeSet::FunctionIndex,
|
|
Attribute::Builtin),
|
|
"Attribute 'builtin' can only be applied to a callsite.", &F);
|
|
|
|
// Check that this function meets the restrictions on this calling convention.
|
|
switch (F.getCallingConv()) {
|
|
default:
|
|
break;
|
|
case CallingConv::C:
|
|
break;
|
|
case CallingConv::Fast:
|
|
case CallingConv::Cold:
|
|
case CallingConv::X86_FastCall:
|
|
case CallingConv::X86_ThisCall:
|
|
case CallingConv::Intel_OCL_BI:
|
|
case CallingConv::PTX_Kernel:
|
|
case CallingConv::PTX_Device:
|
|
Assert1(!F.isVarArg(),
|
|
"Varargs functions must have C calling conventions!", &F);
|
|
break;
|
|
}
|
|
|
|
bool isLLVMdotName = F.getName().size() >= 5 &&
|
|
F.getName().substr(0, 5) == "llvm.";
|
|
|
|
// Check that the argument values match the function type for this function...
|
|
unsigned i = 0;
|
|
for (Function::const_arg_iterator I = F.arg_begin(), E = F.arg_end(); I != E;
|
|
++I, ++i) {
|
|
Assert2(I->getType() == FT->getParamType(i),
|
|
"Argument value does not match function argument type!",
|
|
I, FT->getParamType(i));
|
|
Assert1(I->getType()->isFirstClassType(),
|
|
"Function arguments must have first-class types!", I);
|
|
if (!isLLVMdotName)
|
|
Assert2(!I->getType()->isMetadataTy(),
|
|
"Function takes metadata but isn't an intrinsic", I, &F);
|
|
}
|
|
|
|
if (F.isMaterializable()) {
|
|
// Function has a body somewhere we can't see.
|
|
} else if (F.isDeclaration()) {
|
|
Assert1(F.hasExternalLinkage() || F.hasExternalWeakLinkage(),
|
|
"invalid linkage type for function declaration", &F);
|
|
} else {
|
|
// Verify that this function (which has a body) is not named "llvm.*". It
|
|
// is not legal to define intrinsics.
|
|
Assert1(!isLLVMdotName, "llvm intrinsics cannot be defined!", &F);
|
|
|
|
// Check the entry node
|
|
const BasicBlock *Entry = &F.getEntryBlock();
|
|
Assert1(pred_begin(Entry) == pred_end(Entry),
|
|
"Entry block to function must not have predecessors!", Entry);
|
|
|
|
// The address of the entry block cannot be taken, unless it is dead.
|
|
if (Entry->hasAddressTaken()) {
|
|
Assert1(!BlockAddress::lookup(Entry)->isConstantUsed(),
|
|
"blockaddress may not be used with the entry block!", Entry);
|
|
}
|
|
}
|
|
|
|
// If this function is actually an intrinsic, verify that it is only used in
|
|
// direct call/invokes, never having its "address taken".
|
|
if (F.getIntrinsicID()) {
|
|
const User *U;
|
|
if (F.hasAddressTaken(&U))
|
|
Assert1(0, "Invalid user of intrinsic instruction!", U);
|
|
}
|
|
|
|
Assert1(!F.hasDLLImportStorageClass() ||
|
|
(F.isDeclaration() && F.hasExternalLinkage()) ||
|
|
F.hasAvailableExternallyLinkage(),
|
|
"Function is marked as dllimport, but not external.", &F);
|
|
}
|
|
|
|
// verifyBasicBlock - Verify that a basic block is well formed...
|
|
//
|
|
void Verifier::visitBasicBlock(BasicBlock &BB) {
|
|
InstsInThisBlock.clear();
|
|
|
|
// Ensure that basic blocks have terminators!
|
|
Assert1(BB.getTerminator(), "Basic Block does not have terminator!", &BB);
|
|
|
|
// Check constraints that this basic block imposes on all of the PHI nodes in
|
|
// it.
|
|
if (isa<PHINode>(BB.front())) {
|
|
SmallVector<BasicBlock*, 8> Preds(pred_begin(&BB), pred_end(&BB));
|
|
SmallVector<std::pair<BasicBlock*, Value*>, 8> Values;
|
|
std::sort(Preds.begin(), Preds.end());
|
|
PHINode *PN;
|
|
for (BasicBlock::iterator I = BB.begin(); (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 should have one entry for each predecessor of its "
|
|
"parent basic block!", PN);
|
|
|
|
// Get and sort all incoming values in the PHI node...
|
|
Values.clear();
|
|
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]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
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());
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitBranchInst(BranchInst &BI) {
|
|
if (BI.isConditional()) {
|
|
Assert2(BI.getCondition()->getType()->isIntegerTy(1),
|
|
"Branch condition is not 'i1' type!", &BI, BI.getCondition());
|
|
}
|
|
visitTerminatorInst(BI);
|
|
}
|
|
|
|
void Verifier::visitReturnInst(ReturnInst &RI) {
|
|
Function *F = RI.getParent()->getParent();
|
|
unsigned N = RI.getNumOperands();
|
|
if (F->getReturnType()->isVoidTy())
|
|
Assert2(N == 0,
|
|
"Found return instr that returns non-void in Function of void "
|
|
"return type!", &RI, F->getReturnType());
|
|
else
|
|
Assert2(N == 1 && F->getReturnType() == RI.getOperand(0)->getType(),
|
|
"Function return type does not match operand "
|
|
"type of return inst!", &RI, F->getReturnType());
|
|
|
|
// Check to make sure that the return value has necessary properties for
|
|
// terminators...
|
|
visitTerminatorInst(RI);
|
|
}
|
|
|
|
void Verifier::visitSwitchInst(SwitchInst &SI) {
|
|
// Check to make sure that all of the constants in the switch instruction
|
|
// have the same type as the switched-on value.
|
|
Type *SwitchTy = SI.getCondition()->getType();
|
|
SmallPtrSet<ConstantInt*, 32> Constants;
|
|
for (SwitchInst::CaseIt i = SI.case_begin(), e = SI.case_end(); i != e; ++i) {
|
|
Assert1(i.getCaseValue()->getType() == SwitchTy,
|
|
"Switch constants must all be same type as switch value!", &SI);
|
|
Assert2(Constants.insert(i.getCaseValue()),
|
|
"Duplicate integer as switch case", &SI, i.getCaseValue());
|
|
}
|
|
|
|
visitTerminatorInst(SI);
|
|
}
|
|
|
|
void Verifier::visitIndirectBrInst(IndirectBrInst &BI) {
|
|
Assert1(BI.getAddress()->getType()->isPointerTy(),
|
|
"Indirectbr operand must have pointer type!", &BI);
|
|
for (unsigned i = 0, e = BI.getNumDestinations(); i != e; ++i)
|
|
Assert1(BI.getDestination(i)->getType()->isLabelTy(),
|
|
"Indirectbr destinations must all have pointer type!", &BI);
|
|
|
|
visitTerminatorInst(BI);
|
|
}
|
|
|
|
void Verifier::visitSelectInst(SelectInst &SI) {
|
|
Assert1(!SelectInst::areInvalidOperands(SI.getOperand(0), SI.getOperand(1),
|
|
SI.getOperand(2)),
|
|
"Invalid operands for select instruction!", &SI);
|
|
|
|
Assert1(SI.getTrueValue()->getType() == SI.getType(),
|
|
"Select values must have same type as select instruction!", &SI);
|
|
visitInstruction(SI);
|
|
}
|
|
|
|
/// visitUserOp1 - User defined operators shouldn't live beyond the lifetime of
|
|
/// a pass, if any exist, it's an error.
|
|
///
|
|
void Verifier::visitUserOp1(Instruction &I) {
|
|
Assert1(0, "User-defined operators should not live outside of a pass!", &I);
|
|
}
|
|
|
|
void Verifier::visitTruncInst(TruncInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
// Get the size of the types in bits, we'll need this later
|
|
unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
|
|
unsigned DestBitSize = DestTy->getScalarSizeInBits();
|
|
|
|
Assert1(SrcTy->isIntOrIntVectorTy(), "Trunc only operates on integer", &I);
|
|
Assert1(DestTy->isIntOrIntVectorTy(), "Trunc only produces integer", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"trunc source and destination must both be a vector or neither", &I);
|
|
Assert1(SrcBitSize > DestBitSize,"DestTy too big for Trunc", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitZExtInst(ZExtInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
// Get the size of the types in bits, we'll need this later
|
|
Assert1(SrcTy->isIntOrIntVectorTy(), "ZExt only operates on integer", &I);
|
|
Assert1(DestTy->isIntOrIntVectorTy(), "ZExt only produces an integer", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"zext source and destination must both be a vector or neither", &I);
|
|
unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
|
|
unsigned DestBitSize = DestTy->getScalarSizeInBits();
|
|
|
|
Assert1(SrcBitSize < DestBitSize,"Type too small for ZExt", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitSExtInst(SExtInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
// Get the size of the types in bits, we'll need this later
|
|
unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
|
|
unsigned DestBitSize = DestTy->getScalarSizeInBits();
|
|
|
|
Assert1(SrcTy->isIntOrIntVectorTy(), "SExt only operates on integer", &I);
|
|
Assert1(DestTy->isIntOrIntVectorTy(), "SExt only produces an integer", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"sext source and destination must both be a vector or neither", &I);
|
|
Assert1(SrcBitSize < DestBitSize,"Type too small for SExt", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitFPTruncInst(FPTruncInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
// Get the size of the types in bits, we'll need this later
|
|
unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
|
|
unsigned DestBitSize = DestTy->getScalarSizeInBits();
|
|
|
|
Assert1(SrcTy->isFPOrFPVectorTy(),"FPTrunc only operates on FP", &I);
|
|
Assert1(DestTy->isFPOrFPVectorTy(),"FPTrunc only produces an FP", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"fptrunc source and destination must both be a vector or neither",&I);
|
|
Assert1(SrcBitSize > DestBitSize,"DestTy too big for FPTrunc", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitFPExtInst(FPExtInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
// Get the size of the types in bits, we'll need this later
|
|
unsigned SrcBitSize = SrcTy->getScalarSizeInBits();
|
|
unsigned DestBitSize = DestTy->getScalarSizeInBits();
|
|
|
|
Assert1(SrcTy->isFPOrFPVectorTy(),"FPExt only operates on FP", &I);
|
|
Assert1(DestTy->isFPOrFPVectorTy(),"FPExt only produces an FP", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"fpext source and destination must both be a vector or neither", &I);
|
|
Assert1(SrcBitSize < DestBitSize,"DestTy too small for FPExt", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitUIToFPInst(UIToFPInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
bool SrcVec = SrcTy->isVectorTy();
|
|
bool DstVec = DestTy->isVectorTy();
|
|
|
|
Assert1(SrcVec == DstVec,
|
|
"UIToFP source and dest must both be vector or scalar", &I);
|
|
Assert1(SrcTy->isIntOrIntVectorTy(),
|
|
"UIToFP source must be integer or integer vector", &I);
|
|
Assert1(DestTy->isFPOrFPVectorTy(),
|
|
"UIToFP result must be FP or FP vector", &I);
|
|
|
|
if (SrcVec && DstVec)
|
|
Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
|
|
cast<VectorType>(DestTy)->getNumElements(),
|
|
"UIToFP source and dest vector length mismatch", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitSIToFPInst(SIToFPInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
bool SrcVec = SrcTy->isVectorTy();
|
|
bool DstVec = DestTy->isVectorTy();
|
|
|
|
Assert1(SrcVec == DstVec,
|
|
"SIToFP source and dest must both be vector or scalar", &I);
|
|
Assert1(SrcTy->isIntOrIntVectorTy(),
|
|
"SIToFP source must be integer or integer vector", &I);
|
|
Assert1(DestTy->isFPOrFPVectorTy(),
|
|
"SIToFP result must be FP or FP vector", &I);
|
|
|
|
if (SrcVec && DstVec)
|
|
Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
|
|
cast<VectorType>(DestTy)->getNumElements(),
|
|
"SIToFP source and dest vector length mismatch", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitFPToUIInst(FPToUIInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
bool SrcVec = SrcTy->isVectorTy();
|
|
bool DstVec = DestTy->isVectorTy();
|
|
|
|
Assert1(SrcVec == DstVec,
|
|
"FPToUI source and dest must both be vector or scalar", &I);
|
|
Assert1(SrcTy->isFPOrFPVectorTy(), "FPToUI source must be FP or FP vector",
|
|
&I);
|
|
Assert1(DestTy->isIntOrIntVectorTy(),
|
|
"FPToUI result must be integer or integer vector", &I);
|
|
|
|
if (SrcVec && DstVec)
|
|
Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
|
|
cast<VectorType>(DestTy)->getNumElements(),
|
|
"FPToUI source and dest vector length mismatch", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitFPToSIInst(FPToSIInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
bool SrcVec = SrcTy->isVectorTy();
|
|
bool DstVec = DestTy->isVectorTy();
|
|
|
|
Assert1(SrcVec == DstVec,
|
|
"FPToSI source and dest must both be vector or scalar", &I);
|
|
Assert1(SrcTy->isFPOrFPVectorTy(),
|
|
"FPToSI source must be FP or FP vector", &I);
|
|
Assert1(DestTy->isIntOrIntVectorTy(),
|
|
"FPToSI result must be integer or integer vector", &I);
|
|
|
|
if (SrcVec && DstVec)
|
|
Assert1(cast<VectorType>(SrcTy)->getNumElements() ==
|
|
cast<VectorType>(DestTy)->getNumElements(),
|
|
"FPToSI source and dest vector length mismatch", &I);
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitPtrToIntInst(PtrToIntInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
Assert1(SrcTy->getScalarType()->isPointerTy(),
|
|
"PtrToInt source must be pointer", &I);
|
|
Assert1(DestTy->getScalarType()->isIntegerTy(),
|
|
"PtrToInt result must be integral", &I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"PtrToInt type mismatch", &I);
|
|
|
|
if (SrcTy->isVectorTy()) {
|
|
VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
|
|
VectorType *VDest = dyn_cast<VectorType>(DestTy);
|
|
Assert1(VSrc->getNumElements() == VDest->getNumElements(),
|
|
"PtrToInt Vector width mismatch", &I);
|
|
}
|
|
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitIntToPtrInst(IntToPtrInst &I) {
|
|
// Get the source and destination types
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
Assert1(SrcTy->getScalarType()->isIntegerTy(),
|
|
"IntToPtr source must be an integral", &I);
|
|
Assert1(DestTy->getScalarType()->isPointerTy(),
|
|
"IntToPtr result must be a pointer",&I);
|
|
Assert1(SrcTy->isVectorTy() == DestTy->isVectorTy(),
|
|
"IntToPtr type mismatch", &I);
|
|
if (SrcTy->isVectorTy()) {
|
|
VectorType *VSrc = dyn_cast<VectorType>(SrcTy);
|
|
VectorType *VDest = dyn_cast<VectorType>(DestTy);
|
|
Assert1(VSrc->getNumElements() == VDest->getNumElements(),
|
|
"IntToPtr Vector width mismatch", &I);
|
|
}
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitBitCastInst(BitCastInst &I) {
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
VerifyBitcastType(&I, DestTy, SrcTy);
|
|
visitInstruction(I);
|
|
}
|
|
|
|
void Verifier::visitAddrSpaceCastInst(AddrSpaceCastInst &I) {
|
|
Type *SrcTy = I.getOperand(0)->getType();
|
|
Type *DestTy = I.getType();
|
|
|
|
Assert1(SrcTy->isPtrOrPtrVectorTy(),
|
|
"AddrSpaceCast source must be a pointer", &I);
|
|
Assert1(DestTy->isPtrOrPtrVectorTy(),
|
|
"AddrSpaceCast result must be a pointer", &I);
|
|
Assert1(SrcTy->getPointerAddressSpace() != DestTy->getPointerAddressSpace(),
|
|
"AddrSpaceCast must be between different address spaces", &I);
|
|
if (SrcTy->isVectorTy())
|
|
Assert1(SrcTy->getVectorNumElements() == DestTy->getVectorNumElements(),
|
|
"AddrSpaceCast vector pointer number of elements mismatch", &I);
|
|
visitInstruction(I);
|
|
}
|
|
|
|
/// visitPHINode - Ensure that a PHI node is well formed.
|
|
///
|
|
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
|
|
// either nonexistent (because this is begin()) or is a PHI node. If not,
|
|
// then there is some other instruction before a PHI.
|
|
Assert2(&PN == &PN.getParent()->front() ||
|
|
isa<PHINode>(--BasicBlock::iterator(&PN)),
|
|
"PHI nodes not grouped at top of basic block!",
|
|
&PN, PN.getParent());
|
|
|
|
// Check that all of the values of the PHI node have the same type as the
|
|
// result, and that the incoming blocks are really basic blocks.
|
|
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);
|
|
}
|
|
|
|
// All other PHI node constraints are checked in the visitBasicBlock method.
|
|
|
|
visitInstruction(PN);
|
|
}
|
|
|
|
void Verifier::VerifyCallSite(CallSite CS) {
|
|
Instruction *I = CS.getInstruction();
|
|
|
|
Assert1(CS.getCalledValue()->getType()->isPointerTy(),
|
|
"Called function must be a pointer!", I);
|
|
PointerType *FPTy = cast<PointerType>(CS.getCalledValue()->getType());
|
|
|
|
Assert1(FPTy->getElementType()->isFunctionTy(),
|
|
"Called function is not pointer to function type!", I);
|
|
FunctionType *FTy = cast<FunctionType>(FPTy->getElementType());
|
|
|
|
// Verify that the correct number of arguments are being passed
|
|
if (FTy->isVarArg())
|
|
Assert1(CS.arg_size() >= FTy->getNumParams(),
|
|
"Called function requires more parameters than were provided!",I);
|
|
else
|
|
Assert1(CS.arg_size() == FTy->getNumParams(),
|
|
"Incorrect number of arguments passed to called function!", I);
|
|
|
|
// Verify that all arguments to the call match the function type.
|
|
for (unsigned i = 0, e = FTy->getNumParams(); i != e; ++i)
|
|
Assert3(CS.getArgument(i)->getType() == FTy->getParamType(i),
|
|
"Call parameter type does not match function signature!",
|
|
CS.getArgument(i), FTy->getParamType(i), I);
|
|
|
|
AttributeSet Attrs = CS.getAttributes();
|
|
|
|
Assert1(VerifyAttributeCount(Attrs, CS.arg_size()),
|
|
"Attribute after last parameter!", I);
|
|
|
|
// Verify call attributes.
|
|
VerifyFunctionAttrs(FTy, Attrs, I);
|
|
|
|
if (FTy->isVarArg()) {
|
|
// FIXME? is 'nest' even legal here?
|
|
bool SawNest = false;
|
|
bool SawReturned = false;
|
|
|
|
for (unsigned Idx = 1; Idx < 1 + FTy->getNumParams(); ++Idx) {
|
|
if (Attrs.hasAttribute(Idx, Attribute::Nest))
|
|
SawNest = true;
|
|
if (Attrs.hasAttribute(Idx, Attribute::Returned))
|
|
SawReturned = true;
|
|
}
|
|
|
|
// Check attributes on the varargs part.
|
|
for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
|
|
Type *Ty = CS.getArgument(Idx-1)->getType();
|
|
VerifyParameterAttrs(Attrs, Idx, Ty, false, I);
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::Nest)) {
|
|
Assert1(!SawNest, "More than one parameter has attribute nest!", I);
|
|
SawNest = true;
|
|
}
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::Returned)) {
|
|
Assert1(!SawReturned, "More than one parameter has attribute returned!",
|
|
I);
|
|
Assert1(Ty->canLosslesslyBitCastTo(FTy->getReturnType()),
|
|
"Incompatible argument and return types for 'returned' "
|
|
"attribute", I);
|
|
SawReturned = true;
|
|
}
|
|
|
|
Assert1(!Attrs.hasAttribute(Idx, Attribute::StructRet),
|
|
"Attribute 'sret' cannot be used for vararg call arguments!", I);
|
|
|
|
if (Attrs.hasAttribute(Idx, Attribute::InAlloca))
|
|
Assert1(Idx == CS.arg_size(), "inalloca isn't on the last argument!",
|
|
I);
|
|
}
|
|
}
|
|
|
|
// Verify that there's no metadata unless it's a direct call to an intrinsic.
|
|
if (CS.getCalledFunction() == 0 ||
|
|
!CS.getCalledFunction()->getName().startswith("llvm.")) {
|
|
for (FunctionType::param_iterator PI = FTy->param_begin(),
|
|
PE = FTy->param_end(); PI != PE; ++PI)
|
|
Assert1(!(*PI)->isMetadataTy(),
|
|
"Function has metadata parameter but isn't an intrinsic", I);
|
|
}
|
|
|
|
visitInstruction(*I);
|
|
}
|
|
|
|
void Verifier::visitCallInst(CallInst &CI) {
|
|
VerifyCallSite(&CI);
|
|
|
|
if (Function *F = CI.getCalledFunction())
|
|
if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
|
|
visitIntrinsicFunctionCall(ID, CI);
|
|
}
|
|
|
|
void Verifier::visitInvokeInst(InvokeInst &II) {
|
|
VerifyCallSite(&II);
|
|
|
|
// Verify that there is a landingpad instruction as the first non-PHI
|
|
// instruction of the 'unwind' destination.
|
|
Assert1(II.getUnwindDest()->isLandingPad(),
|
|
"The unwind destination does not have a landingpad instruction!",&II);
|
|
|
|
visitTerminatorInst(II);
|
|
}
|
|
|
|
/// visitBinaryOperator - Check that both arguments to the binary operator are
|
|
/// of the same type!
|
|
///
|
|
void Verifier::visitBinaryOperator(BinaryOperator &B) {
|
|
Assert1(B.getOperand(0)->getType() == B.getOperand(1)->getType(),
|
|
"Both operands to a binary operator are not of the same type!", &B);
|
|
|
|
switch (B.getOpcode()) {
|
|
// Check that integer arithmetic operators are only used with
|
|
// integral operands.
|
|
case Instruction::Add:
|
|
case Instruction::Sub:
|
|
case Instruction::Mul:
|
|
case Instruction::SDiv:
|
|
case Instruction::UDiv:
|
|
case Instruction::SRem:
|
|
case Instruction::URem:
|
|
Assert1(B.getType()->isIntOrIntVectorTy(),
|
|
"Integer arithmetic operators only work with integral types!", &B);
|
|
Assert1(B.getType() == B.getOperand(0)->getType(),
|
|
"Integer arithmetic operators must have same type "
|
|
"for operands and result!", &B);
|
|
break;
|
|
// Check that floating-point arithmetic operators are only used with
|
|
// floating-point operands.
|
|
case Instruction::FAdd:
|
|
case Instruction::FSub:
|
|
case Instruction::FMul:
|
|
case Instruction::FDiv:
|
|
case Instruction::FRem:
|
|
Assert1(B.getType()->isFPOrFPVectorTy(),
|
|
"Floating-point arithmetic operators only work with "
|
|
"floating-point types!", &B);
|
|
Assert1(B.getType() == B.getOperand(0)->getType(),
|
|
"Floating-point arithmetic operators must have same type "
|
|
"for operands and result!", &B);
|
|
break;
|
|
// Check that logical operators are only used with integral operands.
|
|
case Instruction::And:
|
|
case Instruction::Or:
|
|
case Instruction::Xor:
|
|
Assert1(B.getType()->isIntOrIntVectorTy(),
|
|
"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);
|
|
break;
|
|
case Instruction::Shl:
|
|
case Instruction::LShr:
|
|
case Instruction::AShr:
|
|
Assert1(B.getType()->isIntOrIntVectorTy(),
|
|
"Shifts only work with integral types!", &B);
|
|
Assert1(B.getType() == B.getOperand(0)->getType(),
|
|
"Shift return type must be same as operands!", &B);
|
|
break;
|
|
default:
|
|
llvm_unreachable("Unknown BinaryOperator opcode!");
|
|
}
|
|
|
|
visitInstruction(B);
|
|
}
|
|
|
|
void Verifier::visitICmpInst(ICmpInst &IC) {
|
|
// Check that the operands are the same type
|
|
Type *Op0Ty = IC.getOperand(0)->getType();
|
|
Type *Op1Ty = IC.getOperand(1)->getType();
|
|
Assert1(Op0Ty == Op1Ty,
|
|
"Both operands to ICmp instruction are not of the same type!", &IC);
|
|
// Check that the operands are the right type
|
|
Assert1(Op0Ty->isIntOrIntVectorTy() || Op0Ty->getScalarType()->isPointerTy(),
|
|
"Invalid operand types for ICmp instruction", &IC);
|
|
// Check that the predicate is valid.
|
|
Assert1(IC.getPredicate() >= CmpInst::FIRST_ICMP_PREDICATE &&
|
|
IC.getPredicate() <= CmpInst::LAST_ICMP_PREDICATE,
|
|
"Invalid predicate in ICmp instruction!", &IC);
|
|
|
|
visitInstruction(IC);
|
|
}
|
|
|
|
void Verifier::visitFCmpInst(FCmpInst &FC) {
|
|
// Check that the operands are the same type
|
|
Type *Op0Ty = FC.getOperand(0)->getType();
|
|
Type *Op1Ty = FC.getOperand(1)->getType();
|
|
Assert1(Op0Ty == Op1Ty,
|
|
"Both operands to FCmp instruction are not of the same type!", &FC);
|
|
// Check that the operands are the right type
|
|
Assert1(Op0Ty->isFPOrFPVectorTy(),
|
|
"Invalid operand types for FCmp instruction", &FC);
|
|
// Check that the predicate is valid.
|
|
Assert1(FC.getPredicate() >= CmpInst::FIRST_FCMP_PREDICATE &&
|
|
FC.getPredicate() <= CmpInst::LAST_FCMP_PREDICATE,
|
|
"Invalid predicate in FCmp instruction!", &FC);
|
|
|
|
visitInstruction(FC);
|
|
}
|
|
|
|
void Verifier::visitExtractElementInst(ExtractElementInst &EI) {
|
|
Assert1(ExtractElementInst::isValidOperands(EI.getOperand(0),
|
|
EI.getOperand(1)),
|
|
"Invalid extractelement operands!", &EI);
|
|
visitInstruction(EI);
|
|
}
|
|
|
|
void Verifier::visitInsertElementInst(InsertElementInst &IE) {
|
|
Assert1(InsertElementInst::isValidOperands(IE.getOperand(0),
|
|
IE.getOperand(1),
|
|
IE.getOperand(2)),
|
|
"Invalid insertelement operands!", &IE);
|
|
visitInstruction(IE);
|
|
}
|
|
|
|
void Verifier::visitShuffleVectorInst(ShuffleVectorInst &SV) {
|
|
Assert1(ShuffleVectorInst::isValidOperands(SV.getOperand(0), SV.getOperand(1),
|
|
SV.getOperand(2)),
|
|
"Invalid shufflevector operands!", &SV);
|
|
visitInstruction(SV);
|
|
}
|
|
|
|
void Verifier::visitGetElementPtrInst(GetElementPtrInst &GEP) {
|
|
Type *TargetTy = GEP.getPointerOperandType()->getScalarType();
|
|
|
|
Assert1(isa<PointerType>(TargetTy),
|
|
"GEP base pointer is not a vector or a vector of pointers", &GEP);
|
|
Assert1(cast<PointerType>(TargetTy)->getElementType()->isSized(),
|
|
"GEP into unsized type!", &GEP);
|
|
Assert1(GEP.getPointerOperandType()->isVectorTy() ==
|
|
GEP.getType()->isVectorTy(), "Vector GEP must return a vector value",
|
|
&GEP);
|
|
|
|
SmallVector<Value*, 16> Idxs(GEP.idx_begin(), GEP.idx_end());
|
|
Type *ElTy =
|
|
GetElementPtrInst::getIndexedType(GEP.getPointerOperandType(), Idxs);
|
|
Assert1(ElTy, "Invalid indices for GEP pointer type!", &GEP);
|
|
|
|
Assert2(GEP.getType()->getScalarType()->isPointerTy() &&
|
|
cast<PointerType>(GEP.getType()->getScalarType())->getElementType()
|
|
== ElTy, "GEP is not of right type for indices!", &GEP, ElTy);
|
|
|
|
if (GEP.getPointerOperandType()->isVectorTy()) {
|
|
// Additional checks for vector GEPs.
|
|
unsigned GepWidth = GEP.getPointerOperandType()->getVectorNumElements();
|
|
Assert1(GepWidth == GEP.getType()->getVectorNumElements(),
|
|
"Vector GEP result width doesn't match operand's", &GEP);
|
|
for (unsigned i = 0, e = Idxs.size(); i != e; ++i) {
|
|
Type *IndexTy = Idxs[i]->getType();
|
|
Assert1(IndexTy->isVectorTy(),
|
|
"Vector GEP must have vector indices!", &GEP);
|
|
unsigned IndexWidth = IndexTy->getVectorNumElements();
|
|
Assert1(IndexWidth == GepWidth, "Invalid GEP index vector width", &GEP);
|
|
}
|
|
}
|
|
visitInstruction(GEP);
|
|
}
|
|
|
|
static bool isContiguous(const ConstantRange &A, const ConstantRange &B) {
|
|
return A.getUpper() == B.getLower() || A.getLower() == B.getUpper();
|
|
}
|
|
|
|
void Verifier::visitLoadInst(LoadInst &LI) {
|
|
PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
|
|
Assert1(PTy, "Load operand must be a pointer.", &LI);
|
|
Type *ElTy = PTy->getElementType();
|
|
Assert2(ElTy == LI.getType(),
|
|
"Load result type does not match pointer operand type!", &LI, ElTy);
|
|
if (LI.isAtomic()) {
|
|
Assert1(LI.getOrdering() != Release && LI.getOrdering() != AcquireRelease,
|
|
"Load cannot have Release ordering", &LI);
|
|
Assert1(LI.getAlignment() != 0,
|
|
"Atomic load must specify explicit alignment", &LI);
|
|
if (!ElTy->isPointerTy()) {
|
|
Assert2(ElTy->isIntegerTy(),
|
|
"atomic store operand must have integer type!",
|
|
&LI, ElTy);
|
|
unsigned Size = ElTy->getPrimitiveSizeInBits();
|
|
Assert2(Size >= 8 && !(Size & (Size - 1)),
|
|
"atomic store operand must be power-of-two byte-sized integer",
|
|
&LI, ElTy);
|
|
}
|
|
} else {
|
|
Assert1(LI.getSynchScope() == CrossThread,
|
|
"Non-atomic load cannot have SynchronizationScope specified", &LI);
|
|
}
|
|
|
|
if (MDNode *Range = LI.getMetadata(LLVMContext::MD_range)) {
|
|
unsigned NumOperands = Range->getNumOperands();
|
|
Assert1(NumOperands % 2 == 0, "Unfinished range!", Range);
|
|
unsigned NumRanges = NumOperands / 2;
|
|
Assert1(NumRanges >= 1, "It should have at least one range!", Range);
|
|
|
|
ConstantRange LastRange(1); // Dummy initial value
|
|
for (unsigned i = 0; i < NumRanges; ++i) {
|
|
ConstantInt *Low = dyn_cast<ConstantInt>(Range->getOperand(2*i));
|
|
Assert1(Low, "The lower limit must be an integer!", Low);
|
|
ConstantInt *High = dyn_cast<ConstantInt>(Range->getOperand(2*i + 1));
|
|
Assert1(High, "The upper limit must be an integer!", High);
|
|
Assert1(High->getType() == Low->getType() &&
|
|
High->getType() == ElTy, "Range types must match load type!",
|
|
&LI);
|
|
|
|
APInt HighV = High->getValue();
|
|
APInt LowV = Low->getValue();
|
|
ConstantRange CurRange(LowV, HighV);
|
|
Assert1(!CurRange.isEmptySet() && !CurRange.isFullSet(),
|
|
"Range must not be empty!", Range);
|
|
if (i != 0) {
|
|
Assert1(CurRange.intersectWith(LastRange).isEmptySet(),
|
|
"Intervals are overlapping", Range);
|
|
Assert1(LowV.sgt(LastRange.getLower()), "Intervals are not in order",
|
|
Range);
|
|
Assert1(!isContiguous(CurRange, LastRange), "Intervals are contiguous",
|
|
Range);
|
|
}
|
|
LastRange = ConstantRange(LowV, HighV);
|
|
}
|
|
if (NumRanges > 2) {
|
|
APInt FirstLow =
|
|
dyn_cast<ConstantInt>(Range->getOperand(0))->getValue();
|
|
APInt FirstHigh =
|
|
dyn_cast<ConstantInt>(Range->getOperand(1))->getValue();
|
|
ConstantRange FirstRange(FirstLow, FirstHigh);
|
|
Assert1(FirstRange.intersectWith(LastRange).isEmptySet(),
|
|
"Intervals are overlapping", Range);
|
|
Assert1(!isContiguous(FirstRange, LastRange), "Intervals are contiguous",
|
|
Range);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
visitInstruction(LI);
|
|
}
|
|
|
|
void Verifier::visitStoreInst(StoreInst &SI) {
|
|
PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
|
|
Assert1(PTy, "Store operand must be a pointer.", &SI);
|
|
Type *ElTy = PTy->getElementType();
|
|
Assert2(ElTy == SI.getOperand(0)->getType(),
|
|
"Stored value type does not match pointer operand type!",
|
|
&SI, ElTy);
|
|
if (SI.isAtomic()) {
|
|
Assert1(SI.getOrdering() != Acquire && SI.getOrdering() != AcquireRelease,
|
|
"Store cannot have Acquire ordering", &SI);
|
|
Assert1(SI.getAlignment() != 0,
|
|
"Atomic store must specify explicit alignment", &SI);
|
|
if (!ElTy->isPointerTy()) {
|
|
Assert2(ElTy->isIntegerTy(),
|
|
"atomic store operand must have integer type!",
|
|
&SI, ElTy);
|
|
unsigned Size = ElTy->getPrimitiveSizeInBits();
|
|
Assert2(Size >= 8 && !(Size & (Size - 1)),
|
|
"atomic store operand must be power-of-two byte-sized integer",
|
|
&SI, ElTy);
|
|
}
|
|
} else {
|
|
Assert1(SI.getSynchScope() == CrossThread,
|
|
"Non-atomic store cannot have SynchronizationScope specified", &SI);
|
|
}
|
|
visitInstruction(SI);
|
|
}
|
|
|
|
void Verifier::visitAllocaInst(AllocaInst &AI) {
|
|
SmallPtrSet<const Type*, 4> Visited;
|
|
PointerType *PTy = AI.getType();
|
|
Assert1(PTy->getAddressSpace() == 0,
|
|
"Allocation instruction pointer not in the generic address space!",
|
|
&AI);
|
|
Assert1(PTy->getElementType()->isSized(&Visited), "Cannot allocate unsized type",
|
|
&AI);
|
|
Assert1(AI.getArraySize()->getType()->isIntegerTy(),
|
|
"Alloca array size must have integer type", &AI);
|
|
|
|
visitInstruction(AI);
|
|
}
|
|
|
|
void Verifier::visitAtomicCmpXchgInst(AtomicCmpXchgInst &CXI) {
|
|
Assert1(CXI.getOrdering() != NotAtomic,
|
|
"cmpxchg instructions must be atomic.", &CXI);
|
|
Assert1(CXI.getOrdering() != Unordered,
|
|
"cmpxchg instructions cannot be unordered.", &CXI);
|
|
PointerType *PTy = dyn_cast<PointerType>(CXI.getOperand(0)->getType());
|
|
Assert1(PTy, "First cmpxchg operand must be a pointer.", &CXI);
|
|
Type *ElTy = PTy->getElementType();
|
|
Assert2(ElTy->isIntegerTy(),
|
|
"cmpxchg operand must have integer type!",
|
|
&CXI, ElTy);
|
|
unsigned Size = ElTy->getPrimitiveSizeInBits();
|
|
Assert2(Size >= 8 && !(Size & (Size - 1)),
|
|
"cmpxchg operand must be power-of-two byte-sized integer",
|
|
&CXI, ElTy);
|
|
Assert2(ElTy == CXI.getOperand(1)->getType(),
|
|
"Expected value type does not match pointer operand type!",
|
|
&CXI, ElTy);
|
|
Assert2(ElTy == CXI.getOperand(2)->getType(),
|
|
"Stored value type does not match pointer operand type!",
|
|
&CXI, ElTy);
|
|
visitInstruction(CXI);
|
|
}
|
|
|
|
void Verifier::visitAtomicRMWInst(AtomicRMWInst &RMWI) {
|
|
Assert1(RMWI.getOrdering() != NotAtomic,
|
|
"atomicrmw instructions must be atomic.", &RMWI);
|
|
Assert1(RMWI.getOrdering() != Unordered,
|
|
"atomicrmw instructions cannot be unordered.", &RMWI);
|
|
PointerType *PTy = dyn_cast<PointerType>(RMWI.getOperand(0)->getType());
|
|
Assert1(PTy, "First atomicrmw operand must be a pointer.", &RMWI);
|
|
Type *ElTy = PTy->getElementType();
|
|
Assert2(ElTy->isIntegerTy(),
|
|
"atomicrmw operand must have integer type!",
|
|
&RMWI, ElTy);
|
|
unsigned Size = ElTy->getPrimitiveSizeInBits();
|
|
Assert2(Size >= 8 && !(Size & (Size - 1)),
|
|
"atomicrmw operand must be power-of-two byte-sized integer",
|
|
&RMWI, ElTy);
|
|
Assert2(ElTy == RMWI.getOperand(1)->getType(),
|
|
"Argument value type does not match pointer operand type!",
|
|
&RMWI, ElTy);
|
|
Assert1(AtomicRMWInst::FIRST_BINOP <= RMWI.getOperation() &&
|
|
RMWI.getOperation() <= AtomicRMWInst::LAST_BINOP,
|
|
"Invalid binary operation!", &RMWI);
|
|
visitInstruction(RMWI);
|
|
}
|
|
|
|
void Verifier::visitFenceInst(FenceInst &FI) {
|
|
const AtomicOrdering Ordering = FI.getOrdering();
|
|
Assert1(Ordering == Acquire || Ordering == Release ||
|
|
Ordering == AcquireRelease || Ordering == SequentiallyConsistent,
|
|
"fence instructions may only have "
|
|
"acquire, release, acq_rel, or seq_cst ordering.", &FI);
|
|
visitInstruction(FI);
|
|
}
|
|
|
|
void Verifier::visitExtractValueInst(ExtractValueInst &EVI) {
|
|
Assert1(ExtractValueInst::getIndexedType(EVI.getAggregateOperand()->getType(),
|
|
EVI.getIndices()) ==
|
|
EVI.getType(),
|
|
"Invalid ExtractValueInst operands!", &EVI);
|
|
|
|
visitInstruction(EVI);
|
|
}
|
|
|
|
void Verifier::visitInsertValueInst(InsertValueInst &IVI) {
|
|
Assert1(ExtractValueInst::getIndexedType(IVI.getAggregateOperand()->getType(),
|
|
IVI.getIndices()) ==
|
|
IVI.getOperand(1)->getType(),
|
|
"Invalid InsertValueInst operands!", &IVI);
|
|
|
|
visitInstruction(IVI);
|
|
}
|
|
|
|
void Verifier::visitLandingPadInst(LandingPadInst &LPI) {
|
|
BasicBlock *BB = LPI.getParent();
|
|
|
|
// The landingpad instruction is ill-formed if it doesn't have any clauses and
|
|
// isn't a cleanup.
|
|
Assert1(LPI.getNumClauses() > 0 || LPI.isCleanup(),
|
|
"LandingPadInst needs at least one clause or to be a cleanup.", &LPI);
|
|
|
|
// The landingpad instruction defines its parent as a landing pad block. The
|
|
// landing pad block may be branched to only by the unwind edge of an invoke.
|
|
for (pred_iterator I = pred_begin(BB), E = pred_end(BB); I != E; ++I) {
|
|
const InvokeInst *II = dyn_cast<InvokeInst>((*I)->getTerminator());
|
|
Assert1(II && II->getUnwindDest() == BB && II->getNormalDest() != BB,
|
|
"Block containing LandingPadInst must be jumped to "
|
|
"only by the unwind edge of an invoke.", &LPI);
|
|
}
|
|
|
|
// The landingpad instruction must be the first non-PHI instruction in the
|
|
// block.
|
|
Assert1(LPI.getParent()->getLandingPadInst() == &LPI,
|
|
"LandingPadInst not the first non-PHI instruction in the block.",
|
|
&LPI);
|
|
|
|
// The personality functions for all landingpad instructions within the same
|
|
// function should match.
|
|
if (PersonalityFn)
|
|
Assert1(LPI.getPersonalityFn() == PersonalityFn,
|
|
"Personality function doesn't match others in function", &LPI);
|
|
PersonalityFn = LPI.getPersonalityFn();
|
|
|
|
// All operands must be constants.
|
|
Assert1(isa<Constant>(PersonalityFn), "Personality function is not constant!",
|
|
&LPI);
|
|
for (unsigned i = 0, e = LPI.getNumClauses(); i < e; ++i) {
|
|
Value *Clause = LPI.getClause(i);
|
|
Assert1(isa<Constant>(Clause), "Clause is not constant!", &LPI);
|
|
if (LPI.isCatch(i)) {
|
|
Assert1(isa<PointerType>(Clause->getType()),
|
|
"Catch operand does not have pointer type!", &LPI);
|
|
} else {
|
|
Assert1(LPI.isFilter(i), "Clause is neither catch nor filter!", &LPI);
|
|
Assert1(isa<ConstantArray>(Clause) || isa<ConstantAggregateZero>(Clause),
|
|
"Filter operand is not an array of constants!", &LPI);
|
|
}
|
|
}
|
|
|
|
visitInstruction(LPI);
|
|
}
|
|
|
|
void Verifier::verifyDominatesUse(Instruction &I, unsigned i) {
|
|
Instruction *Op = cast<Instruction>(I.getOperand(i));
|
|
// If the we have an invalid invoke, don't try to compute the dominance.
|
|
// We already reject it in the invoke specific checks and the dominance
|
|
// computation doesn't handle multiple edges.
|
|
if (InvokeInst *II = dyn_cast<InvokeInst>(Op)) {
|
|
if (II->getNormalDest() == II->getUnwindDest())
|
|
return;
|
|
}
|
|
|
|
const Use &U = I.getOperandUse(i);
|
|
Assert2(InstsInThisBlock.count(Op) || DT.dominates(Op, U),
|
|
"Instruction does not dominate all uses!", Op, &I);
|
|
}
|
|
|
|
/// verifyInstruction - Verify that an instruction is well formed.
|
|
///
|
|
void Verifier::visitInstruction(Instruction &I) {
|
|
BasicBlock *BB = I.getParent();
|
|
Assert1(BB, "Instruction not embedded in basic block!", &I);
|
|
|
|
if (!isa<PHINode>(I)) { // Check that non-phi nodes are not self referential
|
|
for (Value::use_iterator UI = I.use_begin(), UE = I.use_end();
|
|
UI != UE; ++UI)
|
|
Assert1(*UI != (User*)&I || !DT.isReachableFromEntry(BB),
|
|
"Only PHI nodes may reference their own value!", &I);
|
|
}
|
|
|
|
// Check that void typed values don't have names
|
|
Assert1(!I.getType()->isVoidTy() || !I.hasName(),
|
|
"Instruction has a name, but provides a void value!", &I);
|
|
|
|
// Check that the return value of the instruction is either void or a legal
|
|
// value type.
|
|
Assert1(I.getType()->isVoidTy() ||
|
|
I.getType()->isFirstClassType(),
|
|
"Instruction returns a non-scalar type!", &I);
|
|
|
|
// Check that the instruction doesn't produce metadata. Calls are already
|
|
// checked against the callee type.
|
|
Assert1(!I.getType()->isMetadataTy() ||
|
|
isa<CallInst>(I) || isa<InvokeInst>(I),
|
|
"Invalid use of metadata!", &I);
|
|
|
|
// 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!
|
|
for (User::use_iterator UI = I.use_begin(), UE = I.use_end();
|
|
UI != UE; ++UI) {
|
|
if (Instruction *Used = dyn_cast<Instruction>(*UI))
|
|
Assert2(Used->getParent() != 0, "Instruction referencing instruction not"
|
|
" embedded in a basic block!", &I, Used);
|
|
else {
|
|
CheckFailed("Use of instruction is not an instruction!", *UI);
|
|
return;
|
|
}
|
|
}
|
|
|
|
for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
|
|
Assert1(I.getOperand(i) != 0, "Instruction has null operand!", &I);
|
|
|
|
// Check to make sure that only first-class-values are operands to
|
|
// instructions.
|
|
if (!I.getOperand(i)->getType()->isFirstClassType()) {
|
|
Assert1(0, "Instruction operands must be first-class values!", &I);
|
|
}
|
|
|
|
if (Function *F = dyn_cast<Function>(I.getOperand(i))) {
|
|
// Check to make sure that the "address of" an intrinsic function is never
|
|
// taken.
|
|
Assert1(!F->isIntrinsic() || i == (isa<CallInst>(I) ? e-1 : 0),
|
|
"Cannot take the address of an intrinsic!", &I);
|
|
Assert1(!F->isIntrinsic() || isa<CallInst>(I) ||
|
|
F->getIntrinsicID() == Intrinsic::donothing,
|
|
"Cannot invoke an intrinsinc other than donothing", &I);
|
|
Assert1(F->getParent() == M, "Referencing function in another module!",
|
|
&I);
|
|
} 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 (GlobalValue *GV = dyn_cast<GlobalValue>(I.getOperand(i))) {
|
|
Assert1(GV->getParent() == M, "Referencing global in another module!",
|
|
&I);
|
|
} else if (isa<Instruction>(I.getOperand(i))) {
|
|
verifyDominatesUse(I, i);
|
|
} else if (isa<InlineAsm>(I.getOperand(i))) {
|
|
Assert1((i + 1 == e && isa<CallInst>(I)) ||
|
|
(i + 3 == e && isa<InvokeInst>(I)),
|
|
"Cannot take the address of an inline asm!", &I);
|
|
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(I.getOperand(i))) {
|
|
if (CE->getType()->isPtrOrPtrVectorTy()) {
|
|
// If we have a ConstantExpr pointer, we need to see if it came from an
|
|
// illegal bitcast (inttoptr <constant int> )
|
|
SmallVector<const ConstantExpr *, 4> Stack;
|
|
SmallPtrSet<const ConstantExpr *, 4> Visited;
|
|
Stack.push_back(CE);
|
|
|
|
while (!Stack.empty()) {
|
|
const ConstantExpr *V = Stack.pop_back_val();
|
|
if (!Visited.insert(V))
|
|
continue;
|
|
|
|
VerifyConstantExprBitcastType(V);
|
|
|
|
for (unsigned I = 0, N = V->getNumOperands(); I != N; ++I) {
|
|
if (ConstantExpr *Op = dyn_cast<ConstantExpr>(V->getOperand(I)))
|
|
Stack.push_back(Op);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (MDNode *MD = I.getMetadata(LLVMContext::MD_fpmath)) {
|
|
Assert1(I.getType()->isFPOrFPVectorTy(),
|
|
"fpmath requires a floating point result!", &I);
|
|
Assert1(MD->getNumOperands() == 1, "fpmath takes one operand!", &I);
|
|
Value *Op0 = MD->getOperand(0);
|
|
if (ConstantFP *CFP0 = dyn_cast_or_null<ConstantFP>(Op0)) {
|
|
APFloat Accuracy = CFP0->getValueAPF();
|
|
Assert1(Accuracy.isFiniteNonZero() && !Accuracy.isNegative(),
|
|
"fpmath accuracy not a positive number!", &I);
|
|
} else {
|
|
Assert1(false, "invalid fpmath accuracy!", &I);
|
|
}
|
|
}
|
|
|
|
MDNode *MD = I.getMetadata(LLVMContext::MD_range);
|
|
Assert1(!MD || isa<LoadInst>(I), "Ranges are only for loads!", &I);
|
|
|
|
if (!DisableDebugInfoVerifier) {
|
|
MD = I.getMetadata(LLVMContext::MD_dbg);
|
|
Finder.processLocation(*M, DILocation(MD));
|
|
}
|
|
|
|
InstsInThisBlock.insert(&I);
|
|
}
|
|
|
|
/// VerifyIntrinsicType - Verify that the specified type (which comes from an
|
|
/// intrinsic argument or return value) matches the type constraints specified
|
|
/// by the .td file (e.g. an "any integer" argument really is an integer).
|
|
///
|
|
/// This return true on error but does not print a message.
|
|
bool Verifier::VerifyIntrinsicType(Type *Ty,
|
|
ArrayRef<Intrinsic::IITDescriptor> &Infos,
|
|
SmallVectorImpl<Type*> &ArgTys) {
|
|
using namespace Intrinsic;
|
|
|
|
// If we ran out of descriptors, there are too many arguments.
|
|
if (Infos.empty()) return true;
|
|
IITDescriptor D = Infos.front();
|
|
Infos = Infos.slice(1);
|
|
|
|
switch (D.Kind) {
|
|
case IITDescriptor::Void: return !Ty->isVoidTy();
|
|
case IITDescriptor::VarArg: return true;
|
|
case IITDescriptor::MMX: return !Ty->isX86_MMXTy();
|
|
case IITDescriptor::Metadata: return !Ty->isMetadataTy();
|
|
case IITDescriptor::Half: return !Ty->isHalfTy();
|
|
case IITDescriptor::Float: return !Ty->isFloatTy();
|
|
case IITDescriptor::Double: return !Ty->isDoubleTy();
|
|
case IITDescriptor::Integer: return !Ty->isIntegerTy(D.Integer_Width);
|
|
case IITDescriptor::Vector: {
|
|
VectorType *VT = dyn_cast<VectorType>(Ty);
|
|
return VT == 0 || VT->getNumElements() != D.Vector_Width ||
|
|
VerifyIntrinsicType(VT->getElementType(), Infos, ArgTys);
|
|
}
|
|
case IITDescriptor::Pointer: {
|
|
PointerType *PT = dyn_cast<PointerType>(Ty);
|
|
return PT == 0 || PT->getAddressSpace() != D.Pointer_AddressSpace ||
|
|
VerifyIntrinsicType(PT->getElementType(), Infos, ArgTys);
|
|
}
|
|
|
|
case IITDescriptor::Struct: {
|
|
StructType *ST = dyn_cast<StructType>(Ty);
|
|
if (ST == 0 || ST->getNumElements() != D.Struct_NumElements)
|
|
return true;
|
|
|
|
for (unsigned i = 0, e = D.Struct_NumElements; i != e; ++i)
|
|
if (VerifyIntrinsicType(ST->getElementType(i), Infos, ArgTys))
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
case IITDescriptor::Argument:
|
|
// Two cases here - If this is the second occurrence of an argument, verify
|
|
// that the later instance matches the previous instance.
|
|
if (D.getArgumentNumber() < ArgTys.size())
|
|
return Ty != ArgTys[D.getArgumentNumber()];
|
|
|
|
// Otherwise, if this is the first instance of an argument, record it and
|
|
// verify the "Any" kind.
|
|
assert(D.getArgumentNumber() == ArgTys.size() && "Table consistency error");
|
|
ArgTys.push_back(Ty);
|
|
|
|
switch (D.getArgumentKind()) {
|
|
case IITDescriptor::AK_AnyInteger: return !Ty->isIntOrIntVectorTy();
|
|
case IITDescriptor::AK_AnyFloat: return !Ty->isFPOrFPVectorTy();
|
|
case IITDescriptor::AK_AnyVector: return !isa<VectorType>(Ty);
|
|
case IITDescriptor::AK_AnyPointer: return !isa<PointerType>(Ty);
|
|
}
|
|
llvm_unreachable("all argument kinds not covered");
|
|
|
|
case IITDescriptor::ExtendVecArgument:
|
|
// This may only be used when referring to a previous vector argument.
|
|
return D.getArgumentNumber() >= ArgTys.size() ||
|
|
!isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
|
|
VectorType::getExtendedElementVectorType(
|
|
cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
|
|
|
|
case IITDescriptor::TruncVecArgument:
|
|
// This may only be used when referring to a previous vector argument.
|
|
return D.getArgumentNumber() >= ArgTys.size() ||
|
|
!isa<VectorType>(ArgTys[D.getArgumentNumber()]) ||
|
|
VectorType::getTruncatedElementVectorType(
|
|
cast<VectorType>(ArgTys[D.getArgumentNumber()])) != Ty;
|
|
}
|
|
llvm_unreachable("unhandled");
|
|
}
|
|
|
|
/// \brief Verify if the intrinsic has variable arguments.
|
|
/// This method is intended to be called after all the fixed arguments have been
|
|
/// verified first.
|
|
///
|
|
/// This method returns true on error and does not print an error message.
|
|
bool
|
|
Verifier::VerifyIntrinsicIsVarArg(bool isVarArg,
|
|
ArrayRef<Intrinsic::IITDescriptor> &Infos) {
|
|
using namespace Intrinsic;
|
|
|
|
// If there are no descriptors left, then it can't be a vararg.
|
|
if (Infos.empty())
|
|
return isVarArg ? true : false;
|
|
|
|
// There should be only one descriptor remaining at this point.
|
|
if (Infos.size() != 1)
|
|
return true;
|
|
|
|
// Check and verify the descriptor.
|
|
IITDescriptor D = Infos.front();
|
|
Infos = Infos.slice(1);
|
|
if (D.Kind == IITDescriptor::VarArg)
|
|
return isVarArg ? false : true;
|
|
|
|
return true;
|
|
}
|
|
|
|
/// visitIntrinsicFunction - Allow intrinsics to be verified in different ways.
|
|
///
|
|
void Verifier::visitIntrinsicFunctionCall(Intrinsic::ID ID, CallInst &CI) {
|
|
Function *IF = CI.getCalledFunction();
|
|
Assert1(IF->isDeclaration(), "Intrinsic functions should never be defined!",
|
|
IF);
|
|
|
|
// Verify that the intrinsic prototype lines up with what the .td files
|
|
// describe.
|
|
FunctionType *IFTy = IF->getFunctionType();
|
|
bool IsVarArg = IFTy->isVarArg();
|
|
|
|
SmallVector<Intrinsic::IITDescriptor, 8> Table;
|
|
getIntrinsicInfoTableEntries(ID, Table);
|
|
ArrayRef<Intrinsic::IITDescriptor> TableRef = Table;
|
|
|
|
SmallVector<Type *, 4> ArgTys;
|
|
Assert1(!VerifyIntrinsicType(IFTy->getReturnType(), TableRef, ArgTys),
|
|
"Intrinsic has incorrect return type!", IF);
|
|
for (unsigned i = 0, e = IFTy->getNumParams(); i != e; ++i)
|
|
Assert1(!VerifyIntrinsicType(IFTy->getParamType(i), TableRef, ArgTys),
|
|
"Intrinsic has incorrect argument type!", IF);
|
|
|
|
// Verify if the intrinsic call matches the vararg property.
|
|
if (IsVarArg)
|
|
Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
|
|
"Intrinsic was not defined with variable arguments!", IF);
|
|
else
|
|
Assert1(!VerifyIntrinsicIsVarArg(IsVarArg, TableRef),
|
|
"Callsite was not defined with variable arguments!", IF);
|
|
|
|
// All descriptors should be absorbed by now.
|
|
Assert1(TableRef.empty(), "Intrinsic has too few arguments!", IF);
|
|
|
|
// Now that we have the intrinsic ID and the actual argument types (and we
|
|
// know they are legal for the intrinsic!) get the intrinsic name through the
|
|
// usual means. This allows us to verify the mangling of argument types into
|
|
// the name.
|
|
Assert1(Intrinsic::getName(ID, ArgTys) == IF->getName(),
|
|
"Intrinsic name not mangled correctly for type arguments!", IF);
|
|
|
|
// If the intrinsic takes MDNode arguments, verify that they are either global
|
|
// or are local to *this* function.
|
|
for (unsigned i = 0, e = CI.getNumArgOperands(); i != e; ++i)
|
|
if (MDNode *MD = dyn_cast<MDNode>(CI.getArgOperand(i)))
|
|
visitMDNode(*MD, CI.getParent()->getParent());
|
|
|
|
switch (ID) {
|
|
default:
|
|
break;
|
|
case Intrinsic::ctlz: // llvm.ctlz
|
|
case Intrinsic::cttz: // llvm.cttz
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
|
|
"is_zero_undef argument of bit counting intrinsics must be a "
|
|
"constant int", &CI);
|
|
break;
|
|
case Intrinsic::dbg_declare: { // llvm.dbg.declare
|
|
Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
|
|
"invalid llvm.dbg.declare intrinsic call 1", &CI);
|
|
MDNode *MD = cast<MDNode>(CI.getArgOperand(0));
|
|
Assert1(MD->getNumOperands() == 1,
|
|
"invalid llvm.dbg.declare intrinsic call 2", &CI);
|
|
if (!DisableDebugInfoVerifier)
|
|
Finder.processDeclare(*M, cast<DbgDeclareInst>(&CI));
|
|
} break;
|
|
case Intrinsic::dbg_value: { //llvm.dbg.value
|
|
if (!DisableDebugInfoVerifier) {
|
|
Assert1(CI.getArgOperand(0) && isa<MDNode>(CI.getArgOperand(0)),
|
|
"invalid llvm.dbg.value intrinsic call 1", &CI);
|
|
Finder.processValue(*M, cast<DbgValueInst>(&CI));
|
|
}
|
|
break;
|
|
}
|
|
case Intrinsic::memcpy:
|
|
case Intrinsic::memmove:
|
|
case Intrinsic::memset:
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(3)),
|
|
"alignment argument of memory intrinsics must be a constant int",
|
|
&CI);
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(4)),
|
|
"isvolatile argument of memory intrinsics must be a constant int",
|
|
&CI);
|
|
break;
|
|
case Intrinsic::gcroot:
|
|
case Intrinsic::gcwrite:
|
|
case Intrinsic::gcread:
|
|
if (ID == Intrinsic::gcroot) {
|
|
AllocaInst *AI =
|
|
dyn_cast<AllocaInst>(CI.getArgOperand(0)->stripPointerCasts());
|
|
Assert1(AI, "llvm.gcroot parameter #1 must be an alloca.", &CI);
|
|
Assert1(isa<Constant>(CI.getArgOperand(1)),
|
|
"llvm.gcroot parameter #2 must be a constant.", &CI);
|
|
if (!AI->getType()->getElementType()->isPointerTy()) {
|
|
Assert1(!isa<ConstantPointerNull>(CI.getArgOperand(1)),
|
|
"llvm.gcroot parameter #1 must either be a pointer alloca, "
|
|
"or argument #2 must be a non-null constant.", &CI);
|
|
}
|
|
}
|
|
|
|
Assert1(CI.getParent()->getParent()->hasGC(),
|
|
"Enclosing function does not use GC.", &CI);
|
|
break;
|
|
case Intrinsic::init_trampoline:
|
|
Assert1(isa<Function>(CI.getArgOperand(1)->stripPointerCasts()),
|
|
"llvm.init_trampoline parameter #2 must resolve to a function.",
|
|
&CI);
|
|
break;
|
|
case Intrinsic::prefetch:
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(1)) &&
|
|
isa<ConstantInt>(CI.getArgOperand(2)) &&
|
|
cast<ConstantInt>(CI.getArgOperand(1))->getZExtValue() < 2 &&
|
|
cast<ConstantInt>(CI.getArgOperand(2))->getZExtValue() < 4,
|
|
"invalid arguments to llvm.prefetch",
|
|
&CI);
|
|
break;
|
|
case Intrinsic::stackprotector:
|
|
Assert1(isa<AllocaInst>(CI.getArgOperand(1)->stripPointerCasts()),
|
|
"llvm.stackprotector parameter #2 must resolve to an alloca.",
|
|
&CI);
|
|
break;
|
|
case Intrinsic::lifetime_start:
|
|
case Intrinsic::lifetime_end:
|
|
case Intrinsic::invariant_start:
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(0)),
|
|
"size argument of memory use markers must be a constant integer",
|
|
&CI);
|
|
break;
|
|
case Intrinsic::invariant_end:
|
|
Assert1(isa<ConstantInt>(CI.getArgOperand(1)),
|
|
"llvm.invariant.end parameter #2 must be a constant integer", &CI);
|
|
break;
|
|
}
|
|
}
|
|
|
|
void Verifier::verifyDebugInfo() {
|
|
// Verify Debug Info.
|
|
if (!DisableDebugInfoVerifier) {
|
|
for (DebugInfoFinder::iterator I = Finder.compile_unit_begin(),
|
|
E = Finder.compile_unit_end(); I != E; ++I)
|
|
Assert1(DICompileUnit(*I).Verify(), "DICompileUnit does not Verify!", *I);
|
|
for (DebugInfoFinder::iterator I = Finder.subprogram_begin(),
|
|
E = Finder.subprogram_end(); I != E; ++I)
|
|
Assert1(DISubprogram(*I).Verify(), "DISubprogram does not Verify!", *I);
|
|
for (DebugInfoFinder::iterator I = Finder.global_variable_begin(),
|
|
E = Finder.global_variable_end(); I != E; ++I)
|
|
Assert1(DIGlobalVariable(*I).Verify(),
|
|
"DIGlobalVariable does not Verify!", *I);
|
|
for (DebugInfoFinder::iterator I = Finder.type_begin(),
|
|
E = Finder.type_end(); I != E; ++I)
|
|
Assert1(DIType(*I).Verify(), "DIType does not Verify!", *I);
|
|
for (DebugInfoFinder::iterator I = Finder.scope_begin(),
|
|
E = Finder.scope_end(); I != E; ++I)
|
|
Assert1(DIScope(*I).Verify(), "DIScope does not Verify!", *I);
|
|
}
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Implement the public interfaces to this file...
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
bool llvm::verifyFunction(const Function &f, raw_ostream *OS) {
|
|
Function &F = const_cast<Function &>(f);
|
|
assert(!F.isDeclaration() && "Cannot verify external functions");
|
|
|
|
raw_null_ostream NullStr;
|
|
Verifier V(OS ? *OS : NullStr);
|
|
|
|
// Note that this function's return value is inverted from what you would
|
|
// expect of a function called "verify".
|
|
return !V.verify(F);
|
|
}
|
|
|
|
bool llvm::verifyModule(const Module &M, raw_ostream *OS) {
|
|
raw_null_ostream NullStr;
|
|
Verifier V(OS ? *OS : NullStr);
|
|
|
|
bool Broken = false;
|
|
for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I)
|
|
if (!I->isDeclaration())
|
|
Broken |= !V.verify(*I);
|
|
|
|
// Note that this function's return value is inverted from what you would
|
|
// expect of a function called "verify".
|
|
return !V.verify(M) || Broken;
|
|
}
|
|
|
|
namespace {
|
|
struct VerifierLegacyPass : public FunctionPass {
|
|
static char ID;
|
|
|
|
Verifier V;
|
|
bool FatalErrors;
|
|
|
|
VerifierLegacyPass() : FunctionPass(ID), FatalErrors(true) {
|
|
initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
explicit VerifierLegacyPass(bool FatalErrors)
|
|
: FunctionPass(ID), V(dbgs()), FatalErrors(FatalErrors) {
|
|
initializeVerifierLegacyPassPass(*PassRegistry::getPassRegistry());
|
|
}
|
|
|
|
bool runOnFunction(Function &F) {
|
|
if (!V.verify(F) && FatalErrors)
|
|
report_fatal_error("Broken function found, compilation aborted!");
|
|
|
|
return false;
|
|
}
|
|
|
|
bool doFinalization(Module &M) {
|
|
if (!V.verify(M) && FatalErrors)
|
|
report_fatal_error("Broken module found, compilation aborted!");
|
|
|
|
return false;
|
|
}
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
|
|
AU.setPreservesAll();
|
|
}
|
|
};
|
|
}
|
|
|
|
char VerifierLegacyPass::ID = 0;
|
|
INITIALIZE_PASS(VerifierLegacyPass, "verify", "Module Verifier", false, false)
|
|
|
|
FunctionPass *llvm::createVerifierPass(bool FatalErrors) {
|
|
return new VerifierLegacyPass(FatalErrors);
|
|
}
|
|
|
|
PreservedAnalyses VerifierPass::run(Module *M) {
|
|
if (verifyModule(*M, &dbgs()) && FatalErrors)
|
|
report_fatal_error("Broken module found, compilation aborted!");
|
|
|
|
return PreservedAnalyses::all();
|
|
}
|
|
|
|
PreservedAnalyses VerifierPass::run(Function *F) {
|
|
if (verifyFunction(*F, &dbgs()) && FatalErrors)
|
|
report_fatal_error("Broken function found, compilation aborted!");
|
|
|
|
return PreservedAnalyses::all();
|
|
}
|