Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with
or
.
Download ZIP
Branch: master
Fetching contributors…

Cannot retrieve contributors at this time

351 lines (294 sloc) 12.775 kB
/*
Copyright (c) 2010-2011, Intel Corporation
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
* Neither the name of Intel Corporation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/** @file decl.cpp
@brief Implementations of classes related to turning declarations into
symbols and types.
*/
#include "decl.h"
#include "util.h"
#include "sym.h"
#include "type.h"
#include "expr.h"
#include <stdio.h>
///////////////////////////////////////////////////////////////////////////
// DeclSpecs
DeclSpecs::DeclSpecs(const Type *t, StorageClass sc, int tq) {
baseType = t;
storageClass = sc;
typeQualifier = tq;
soaWidth = 0;
vectorSize = 0;
}
void
DeclSpecs::Print() const {
if (storageClass == SC_EXTERN) printf("extern ");
if (storageClass == SC_EXTERN_C) printf("extern \"C\" ");
if (storageClass == SC_EXPORT) printf("export ");
if (storageClass == SC_STATIC) printf("static ");
if (storageClass == SC_TYPEDEF) printf("typedef ");
if (soaWidth > 0) printf("soa<%d> ", soaWidth);
if (typeQualifier & TYPEQUAL_INLINE) printf("inline ");
if (typeQualifier & TYPEQUAL_CONST) printf("const ");
if (typeQualifier & TYPEQUAL_UNIFORM) printf("uniform ");
if (typeQualifier & TYPEQUAL_VARYING) printf("varying ");
if (typeQualifier & TYPEQUAL_TASK) printf("task ");
if (typeQualifier & TYPEQUAL_REFERENCE) printf("reference ");
if (typeQualifier & TYPEQUAL_UNSIGNED) printf("unsigned ");
printf("%s", baseType->GetString().c_str());
if (vectorSize > 0) printf("<%d>", vectorSize);
}
///////////////////////////////////////////////////////////////////////////
// Declarator
Declarator::Declarator(Symbol *s, SourcePos p)
: pos(p) {
sym = s;
functionArgs = NULL;
isFunction = false;
initExpr = NULL;
}
void
Declarator::AddArrayDimension(int size) {
assert(size > 0 || size == -1); // -1 -> unsized
arraySize.push_back(size);
}
void
Declarator::InitFromDeclSpecs(DeclSpecs *ds) {
sym->type = GetType(ds);
if (ds->storageClass == SC_STATIC)
sym->isStatic = true;
}
void
Declarator::Print() const {
printf("%s", sym->name.c_str());
if (initExpr != NULL) {
printf(" = (");
initExpr->Print();
printf(")");
}
pos.Print();
}
static const Type *
lGetType(const Declarator *decl, DeclSpecs *ds,
std::vector<int>::const_iterator arrayIter) {
if (arrayIter == decl->arraySize.end()) {
// If we don't have an array (or have processed all of the array
// dimensions in previous recursive calls), we can go ahead and
// figure out the final non-array type we have here.
const Type *type = ds->baseType;
if (type == NULL) {
Error(decl->pos, "Type not provided in variable declaration for variable \"%s\".",
decl->sym->name.c_str());
return NULL;
}
// Account for 'unsigned' and 'const' qualifiers in the type
if ((ds->typeQualifier & TYPEQUAL_UNSIGNED) != 0) {
const Type *unsignedType = type->GetAsUnsignedType();
if (unsignedType != NULL)
type = unsignedType;
else
Error(decl->pos, "\"unsigned\" qualifier is illegal with \"%s\" type.",
type->GetString().c_str());
}
if ((ds->typeQualifier & TYPEQUAL_CONST) != 0)
type = type->GetAsConstType();
if (ds->vectorSize > 0) {
const AtomicType *atomicType = dynamic_cast<const AtomicType *>(type);
if (atomicType == NULL) {
Error(decl->pos, "Only atomic types (int, float, ...) are legal for vector "
"types.");
return NULL;
}
type = new VectorType(atomicType, ds->vectorSize);
}
// if uniform/varying is specified explicitly, then go with that
if ((ds->typeQualifier & TYPEQUAL_UNIFORM) != 0)
return type->GetAsUniformType();
else if ((ds->typeQualifier & TYPEQUAL_VARYING) != 0)
return type->GetAsVaryingType();
else {
// otherwise, structs are uniform by default and everything
// else is varying by default
if (dynamic_cast<const StructType *>(type) != NULL)
return type->GetAsUniformType();
else
return type->GetAsVaryingType();
}
}
else {
// Peel off one dimension of the array
int arraySize = *arrayIter;
++arrayIter;
// Get the type, not including the arraySize dimension peeled off
// above.
const Type *childType = lGetType(decl, ds, arrayIter);
int soaWidth = ds->soaWidth;
if (soaWidth == 0)
// If there's no "soa<n>" stuff going on, just return a regular
// array with the appropriate size
return new ArrayType(childType, arraySize == -1 ? 0 : arraySize);
else {
// Make sure we actually have an array of structs ..
const StructType *childStructType =
dynamic_cast<const StructType *>(childType);
if (childStructType == NULL) {
Error(decl->pos, "Illegal to provide soa<%d> qualifier with non-struct "
"type \"%s\".", soaWidth, childType->GetString().c_str());
return new ArrayType(childType, arraySize == -1 ? 0 : arraySize);
}
else if ((soaWidth & (soaWidth - 1)) != 0) {
Error(decl->pos, "soa<%d> width illegal. Value must be power of two.",
soaWidth);
return NULL;
}
else if (arraySize != -1 && (arraySize % soaWidth) != 0) {
Error(decl->pos, "soa<%d> width must evenly divide array size %d.",
soaWidth, arraySize);
return NULL;
}
return new SOAArrayType(childStructType, arraySize == -1 ? 0 : arraySize,
soaWidth);
}
}
}
const Type *
Declarator::GetType(DeclSpecs *ds) const {
bool hasUniformQual = ((ds->typeQualifier & TYPEQUAL_UNIFORM) != 0);
bool hasVaryingQual = ((ds->typeQualifier & TYPEQUAL_VARYING) != 0);
bool isTask = ((ds->typeQualifier & TYPEQUAL_TASK) != 0);
bool isReference = ((ds->typeQualifier & TYPEQUAL_REFERENCE) != 0);
if (hasUniformQual && hasVaryingQual) {
Error(pos, "Can't provide both \"uniform\" and \"varying\" qualifiers.");
return NULL;
}
if (isFunction) {
std::vector<const Type *> args;
std::vector<std::string> argNames;
if (functionArgs) {
// Loop over the function arguments and get names and types for
// each one in the args and argNames arrays
for (unsigned int i = 0; i < functionArgs->size(); ++i) {
Declaration *d = (*functionArgs)[i];
Symbol *sym;
if (d->declarators.size() == 0) {
// function declaration like foo(float), w/o a name for
// the parameter
char buf[32];
sprintf(buf, "__anon_parameter_%d", i);
sym = new Symbol(buf, pos);
Declarator *declarator = new Declarator(sym, sym->pos);
sym->type = declarator->GetType(ds);
d->declarators.push_back(declarator);
}
else {
assert(d->declarators.size() == 1);
sym = d->declarators[0]->sym;
}
// Arrays are passed by reference, so convert array
// parameters to be references here.
if (dynamic_cast<const ArrayType *>(sym->type) != NULL)
sym->type = new ReferenceType(sym->type, sym->type->IsConstType());
args.push_back(sym->type);
argNames.push_back(sym->name);
}
}
if (ds->baseType == NULL) {
Warning(pos, "No return type provided in declaration of function \"%s\". "
"Treating as \"void\".", sym->name.c_str());
ds->baseType = AtomicType::Void;
}
if (isReference) {
Error(pos, "Function return types can't be reference types.");
return NULL;
}
const Type *returnType = lGetType(this, ds, arraySize.begin());
if (returnType == NULL)
return NULL;
bool isExported = (ds->storageClass == SC_EXPORT);
bool isExternC = (ds->storageClass == SC_EXTERN_C);
return new FunctionType(returnType, args, pos, &argNames, isTask,
isExported, isExternC);
}
else {
if (isTask)
Error(pos, "\"task\" qualifier illegal in variable declaration \"%s\".",
sym->name.c_str());
const Type *type = lGetType(this, ds, arraySize.begin());
if (type != NULL && isReference) {
bool hasConstQual = ((ds->typeQualifier & TYPEQUAL_CONST) != 0);
type = new ReferenceType(type, hasConstQual);
}
return type;
}
}
///////////////////////////////////////////////////////////////////////////
// Declaration
void
Declaration::AddSymbols(SymbolTable *st) const {
assert(declSpecs->storageClass != SC_TYPEDEF);
for (unsigned int i = 0; i < declarators.size(); ++i)
if (declarators[i])
st->AddVariable(declarators[i]->sym);
}
void
Declaration::Print() const {
printf("Declaration: specs [");
declSpecs->Print();
printf("], declarators [");
for (unsigned int i = 0 ; i < declarators.size(); ++i) {
declarators[i]->Print();
printf("%s", (i == declarators.size() - 1) ? "]" : ", ");
}
}
///////////////////////////////////////////////////////////////////////////
void
GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
std::vector<const Type *> *elementTypes,
std::vector<std::string> *elementNames,
std::vector<SourcePos> *elementPositions) {
for (unsigned int i = 0; i < sd.size(); ++i) {
const Type *type = sd[i]->type;
// FIXME: making this fake little DeclSpecs here is really
// disgusting
DeclSpecs ds(type);
if (type->IsUniformType())
ds.typeQualifier |= TYPEQUAL_UNIFORM;
else
ds.typeQualifier |= TYPEQUAL_VARYING;
for (unsigned int j = 0; j < sd[i]->declarators->size(); ++j) {
Declarator *d = (*sd[i]->declarators)[j];
d->InitFromDeclSpecs(&ds);
// if it's an unsized array, make it a reference to an unsized
// array, so the caller can pass a pointer...
const ArrayType *at = dynamic_cast<const ArrayType *>(d->sym->type);
if (at && at->GetElementCount() == 0)
d->sym->type = new ReferenceType(d->sym->type, type->IsConstType());
elementTypes->push_back(d->sym->type);
elementNames->push_back(d->sym->name);
elementPositions->push_back(d->sym->pos);
}
}
}
Jump to Line
Something went wrong with that request. Please try again.