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Be more liberal in what parameter attributes are

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allowed on the vararg arguments of a call.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45909 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2008-01-12 16:42:01 +00:00
parent 120d053e3b
commit cfad1b4f78
3 changed files with 49 additions and 35 deletions
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4
include/llvm/ParameterAttributes.h
View File

@ -52,8 +52,8 @@ const uint16_t ParameterOnly = ByVal | InReg | Nest | StructRet;
/// @brief Attributes that only apply to function return values.
const uint16_t ReturnOnly = NoReturn | NoUnwind | ReadNone | ReadOnly;
/// @brief Attributes that can apply to vararg call arguments.
const uint16_t VarArgsCompatible = ByVal;
/// @brief Parameter attributes that do not apply to vararg call arguments.
const uint16_t VarArgsIncompatible = Nest | StructRet;
/// @brief Attributes that are mutually incompatible.
const uint16_t MutuallyIncompatible[3] = {

76
lib/VMCore/Verifier.cpp
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@ -261,8 +261,10 @@ namespace { // Anonymous namespace for class
void VerifyCallSite(CallSite CS);
void VerifyIntrinsicPrototype(Intrinsic::ID ID, Function *F,
unsigned Count, ...);
void VerifyParamAttrs(const FunctionType *FT, const ParamAttrsList *Attrs,
const Value *V);
void VerifyAttrs(uint16_t Attrs, const Type *Ty, bool isReturnValue,
const Value *V);
void VerifyFunctionAttrs(const FunctionType *FT, const ParamAttrsList *Attrs,
const Value *V);
void WriteValue(const Value *V) {
if (!V) return;
@ -382,11 +384,40 @@ void Verifier::visitGlobalAlias(GlobalAlias &GA) {
void Verifier::verifyTypeSymbolTable(TypeSymbolTable &ST) {
}
// VerifyParamAttrs - Check parameter attributes against a function type.
// VerifyAttrs - Check the given parameter attributes for an argument or return
// value of the specified type. The value V is printed in error messages.
void Verifier::VerifyAttrs(uint16_t Attrs, const Type *Ty, bool isReturnValue,
const Value *V) {
if (Attrs == ParamAttr::None)
return;
if (isReturnValue) {
uint16_t RetI = Attrs & ParamAttr::ParameterOnly;
Assert1(!RetI, "Attribute " + ParamAttrsList::getParamAttrsText(RetI) +
"does not apply to return values!", V);
} else {
uint16_t ParmI = Attrs & ParamAttr::ReturnOnly;
Assert1(!ParmI, "Attribute " + ParamAttrsList::getParamAttrsText(ParmI) +
"only applies to return values!", V);
}
for (unsigned i = 0;
i < array_lengthof(ParamAttr::MutuallyIncompatible); ++i) {
uint16_t MutI = Attrs & ParamAttr::MutuallyIncompatible[i];
Assert1(!(MutI & (MutI - 1)), "Attributes " +
ParamAttrsList::getParamAttrsText(MutI) + "are incompatible!", V);
}
uint16_t TypeI = Attrs & ParamAttr::typeIncompatible(Ty);
Assert1(!TypeI, "Wrong type for attribute " +
ParamAttrsList::getParamAttrsText(TypeI), V);
}
// VerifyFunctionAttrs - Check parameter attributes against a function type.
// The value V is printed in error messages.
void Verifier::VerifyParamAttrs(const FunctionType *FT,
const ParamAttrsList *Attrs,
const Value *V) {
void Verifier::VerifyFunctionAttrs(const FunctionType *FT,
const ParamAttrsList *Attrs,
const Value *V) {
if (!Attrs)
return;
@ -395,27 +426,7 @@ void Verifier::VerifyParamAttrs(const FunctionType *FT,
for (unsigned Idx = 0; Idx <= FT->getNumParams(); ++Idx) {
uint16_t Attr = Attrs->getParamAttrs(Idx);
if (!Idx) {
uint16_t RetI = Attr & ParamAttr::ParameterOnly;
Assert1(!RetI, "Attribute " + Attrs->getParamAttrsText(RetI) +
"does not apply to return values!", V);
} else {
uint16_t ParmI = Attr & ParamAttr::ReturnOnly;
Assert1(!ParmI, "Attribute " + Attrs->getParamAttrsText(ParmI) +
"only applies to return values!", V);
}
for (unsigned i = 0;
i < array_lengthof(ParamAttr::MutuallyIncompatible); ++i) {
uint16_t MutI = Attr & ParamAttr::MutuallyIncompatible[i];
Assert1(!(MutI & (MutI - 1)), "Attributes " +
Attrs->getParamAttrsText(MutI) + "are incompatible!", V);
}
uint16_t TypeI =
Attr & ParamAttr::typeIncompatible(FT->getParamType(Idx-1));
Assert1(!TypeI, "Wrong type for attribute " +
Attrs->getParamAttrsText(TypeI), V);
VerifyAttrs(Attr, FT->getParamType(Idx-1), !Idx, V);
if (Attr & ParamAttr::Nest) {
Assert1(!SawNest, "More than one parameter has attribute nest!", V);
@ -453,7 +464,7 @@ void Verifier::visitFunction(Function &F) {
"Attributes after last parameter!", &F);
// Check function attributes.
VerifyParamAttrs(FT, Attrs, &F);
VerifyFunctionAttrs(FT, Attrs, &F);
// Check that this function meets the restrictions on this calling convention.
switch (F.getCallingConv()) {
@ -857,14 +868,17 @@ void Verifier::VerifyCallSite(CallSite CS) {
"Attributes after last argument!", I);
// Verify call attributes.
VerifyParamAttrs(FTy, Attrs, I);
VerifyFunctionAttrs(FTy, Attrs, I);
if (Attrs && FTy->isVarArg())
// Check attributes on the varargs part.
for (unsigned Idx = 1 + FTy->getNumParams(); Idx <= CS.arg_size(); ++Idx) {
uint16_t Attr = Attrs->getParamAttrs(Idx);
uint16_t VArgI = Attr & ~ParamAttr::VarArgsCompatible;
Assert1(!VArgI, "Attribute " + Attrs->getParamAttrsText(VArgI) +
VerifyAttrs(Attr, CS.getArgument(Idx-1)->getType(), false, I);
uint16_t VArgI = Attr & ParamAttr::VarArgsIncompatible;
Assert1(!VArgI, "Attribute " + ParamAttrsList::getParamAttrsText(VArgI) +
"cannot be used for vararg call arguments!", I);
}

4
test/Verifier/2008-01-11-VarargAttrs.ll
View File

@ -1,10 +1,10 @@
; RUN: not llvm-as < %s
; RUN: not llvm-as < %s -o /dev/null
%struct = type { }
declare void @foo(...)
define void @bar() {
call void (...)* @foo(%struct* inreg null )
call void (...)* @foo(%struct* sret null )
ret void
}