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-rw-r--r--lib/Analysis/Lint.cpp87
1 files changed, 41 insertions, 46 deletions
diff --git a/lib/Analysis/Lint.cpp b/lib/Analysis/Lint.cpp
index a9d9724..4318a30 100644
--- a/lib/Analysis/Lint.cpp
+++ b/lib/Analysis/Lint.cpp
@@ -70,7 +70,7 @@ namespace {
void visitCallSite(CallSite CS);
void visitMemoryReference(Instruction &I, Value *Ptr,
- unsigned Size, unsigned Align,
+ uint64_t Size, unsigned Align,
const Type *Ty, unsigned Flags);
void visitCallInst(CallInst &I);
@@ -108,7 +108,9 @@ namespace {
raw_string_ostream MessagesStr;
static char ID; // Pass identification, replacement for typeid
- Lint() : FunctionPass(ID), MessagesStr(Messages) {}
+ Lint() : FunctionPass(ID), MessagesStr(Messages) {
+ initializeLintPass(*PassRegistry::getPassRegistry());
+ }
virtual bool runOnFunction(Function &F);
@@ -129,12 +131,6 @@ namespace {
}
}
- void WriteType(const Type *T) {
- if (!T) return;
- MessagesStr << ' ';
- WriteTypeSymbolic(MessagesStr, T, Mod);
- }
-
// CheckFailed - A check failed, so print out the condition and the message
// that failed. This provides a nice place to put a breakpoint if you want
// to see why something is not correct.
@@ -147,27 +143,16 @@ namespace {
WriteValue(V3);
WriteValue(V4);
}
-
- void CheckFailed(const Twine &Message, const Value *V1,
- const Type *T2, const Value *V3 = 0) {
- MessagesStr << Message.str() << "\n";
- WriteValue(V1);
- WriteType(T2);
- WriteValue(V3);
- }
-
- void CheckFailed(const Twine &Message, const Type *T1,
- const Type *T2 = 0, const Type *T3 = 0) {
- MessagesStr << Message.str() << "\n";
- WriteType(T1);
- WriteType(T2);
- WriteType(T3);
- }
};
}
char Lint::ID = 0;
-INITIALIZE_PASS(Lint, "lint", "Statically lint-checks LLVM IR", false, true);
+INITIALIZE_PASS_BEGIN(Lint, "lint", "Statically lint-checks LLVM IR",
+ false, true)
+INITIALIZE_PASS_DEPENDENCY(DominatorTree)
+INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
+INITIALIZE_PASS_END(Lint, "lint", "Statically lint-checks LLVM IR",
+ false, true)
// Assert - We know that cond should be true, if not print an error message.
#define Assert(C, M) \
@@ -208,7 +193,8 @@ void Lint::visitCallSite(CallSite CS) {
Instruction &I = *CS.getInstruction();
Value *Callee = CS.getCalledValue();
- visitMemoryReference(I, Callee, ~0u, 0, 0, MemRef::Callee);
+ visitMemoryReference(I, Callee, AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Callee);
if (Function *F = dyn_cast<Function>(findValue(Callee, /*OffsetOk=*/false))) {
Assert1(CS.getCallingConv() == F->getCallingConv(),
@@ -245,10 +231,11 @@ void Lint::visitCallSite(CallSite CS) {
// to do. Known partial overlap is not distinguished from the case
// where nothing is known.
if (Formal->hasNoAliasAttr() && Actual->getType()->isPointerTy())
- for (CallSite::arg_iterator BI = CS.arg_begin(); BI != AE; ++BI) {
- Assert1(AI == BI || AA->alias(*AI, *BI) != AliasAnalysis::MustAlias,
+ for (CallSite::arg_iterator BI = CS.arg_begin(); BI != AE; ++BI)
+ Assert1(AI == BI ||
+ !(*BI)->getType()->isPointerTy() ||
+ AA->alias(*AI, *BI) != AliasAnalysis::MustAlias,
"Unusual: noalias argument aliases another argument", &I);
- }
// Check that an sret argument points to valid memory.
if (Formal->hasStructRetAttr() && Actual->getType()->isPointerTy()) {
@@ -281,15 +268,17 @@ void Lint::visitCallSite(CallSite CS) {
case Intrinsic::memcpy: {
MemCpyInst *MCI = cast<MemCpyInst>(&I);
// TODO: If the size is known, use it.
- visitMemoryReference(I, MCI->getDest(), ~0u, MCI->getAlignment(), 0,
+ visitMemoryReference(I, MCI->getDest(), AliasAnalysis::UnknownSize,
+ MCI->getAlignment(), 0,
MemRef::Write);
- visitMemoryReference(I, MCI->getSource(), ~0u, MCI->getAlignment(), 0,
+ visitMemoryReference(I, MCI->getSource(), AliasAnalysis::UnknownSize,
+ MCI->getAlignment(), 0,
MemRef::Read);
// Check that the memcpy arguments don't overlap. The AliasAnalysis API
// isn't expressive enough for what we really want to do. Known partial
// overlap is not distinguished from the case where nothing is known.
- unsigned Size = 0;
+ uint64_t Size = 0;
if (const ConstantInt *Len =
dyn_cast<ConstantInt>(findValue(MCI->getLength(),
/*OffsetOk=*/false)))
@@ -303,16 +292,19 @@ void Lint::visitCallSite(CallSite CS) {
case Intrinsic::memmove: {
MemMoveInst *MMI = cast<MemMoveInst>(&I);
// TODO: If the size is known, use it.
- visitMemoryReference(I, MMI->getDest(), ~0u, MMI->getAlignment(), 0,
+ visitMemoryReference(I, MMI->getDest(), AliasAnalysis::UnknownSize,
+ MMI->getAlignment(), 0,
MemRef::Write);
- visitMemoryReference(I, MMI->getSource(), ~0u, MMI->getAlignment(), 0,
+ visitMemoryReference(I, MMI->getSource(), AliasAnalysis::UnknownSize,
+ MMI->getAlignment(), 0,
MemRef::Read);
break;
}
case Intrinsic::memset: {
MemSetInst *MSI = cast<MemSetInst>(&I);
// TODO: If the size is known, use it.
- visitMemoryReference(I, MSI->getDest(), ~0u, MSI->getAlignment(), 0,
+ visitMemoryReference(I, MSI->getDest(), AliasAnalysis::UnknownSize,
+ MSI->getAlignment(), 0,
MemRef::Write);
break;
}
@@ -322,24 +314,26 @@ void Lint::visitCallSite(CallSite CS) {
"Undefined behavior: va_start called in a non-varargs function",
&I);
- visitMemoryReference(I, CS.getArgument(0), ~0u, 0, 0,
- MemRef::Read | MemRef::Write);
+ visitMemoryReference(I, CS.getArgument(0), AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Read | MemRef::Write);
break;
case Intrinsic::vacopy:
- visitMemoryReference(I, CS.getArgument(0), ~0u, 0, 0, MemRef::Write);
- visitMemoryReference(I, CS.getArgument(1), ~0u, 0, 0, MemRef::Read);
+ visitMemoryReference(I, CS.getArgument(0), AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Write);
+ visitMemoryReference(I, CS.getArgument(1), AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Read);
break;
case Intrinsic::vaend:
- visitMemoryReference(I, CS.getArgument(0), ~0u, 0, 0,
- MemRef::Read | MemRef::Write);
+ visitMemoryReference(I, CS.getArgument(0), AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Read | MemRef::Write);
break;
case Intrinsic::stackrestore:
// Stackrestore doesn't read or write memory, but it sets the
// stack pointer, which the compiler may read from or write to
// at any time, so check it for both readability and writeability.
- visitMemoryReference(I, CS.getArgument(0), ~0u, 0, 0,
- MemRef::Read | MemRef::Write);
+ visitMemoryReference(I, CS.getArgument(0), AliasAnalysis::UnknownSize,
+ 0, 0, MemRef::Read | MemRef::Write);
break;
}
}
@@ -368,7 +362,7 @@ void Lint::visitReturnInst(ReturnInst &I) {
// TODO: Check that the reference is in bounds.
// TODO: Check readnone/readonly function attributes.
void Lint::visitMemoryReference(Instruction &I,
- Value *Ptr, unsigned Size, unsigned Align,
+ Value *Ptr, uint64_t Size, unsigned Align,
const Type *Ty, unsigned Flags) {
// If no memory is being referenced, it doesn't matter if the pointer
// is valid.
@@ -512,12 +506,13 @@ void Lint::visitAllocaInst(AllocaInst &I) {
}
void Lint::visitVAArgInst(VAArgInst &I) {
- visitMemoryReference(I, I.getOperand(0), ~0u, 0, 0,
+ visitMemoryReference(I, I.getOperand(0), AliasAnalysis::UnknownSize, 0, 0,
MemRef::Read | MemRef::Write);
}
void Lint::visitIndirectBrInst(IndirectBrInst &I) {
- visitMemoryReference(I, I.getAddress(), ~0u, 0, 0, MemRef::Branchee);
+ visitMemoryReference(I, I.getAddress(), AliasAnalysis::UnknownSize, 0, 0,
+ MemRef::Branchee);
Assert1(I.getNumDestinations() != 0,
"Undefined behavior: indirectbr with no destinations", &I);
generated by cgit v1.1 at 2025-08-25 08:17:05 +0000