afcd42028f
Both uniform and varying function pointers are supported; when a function is called through a varying function pointer, each unique function pointer value across the running program instances is called once for the set of active program instances that want to call it.
415 lines
15 KiB
C++
415 lines
15 KiB
C++
/*
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Copyright (c) 2010-2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file decl.cpp
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@brief Implementations of classes related to turning declarations into
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symbols and types.
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*/
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#include "decl.h"
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#include "util.h"
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#include "module.h"
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#include "sym.h"
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#include "type.h"
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#include "stmt.h"
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#include "expr.h"
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#include <stdio.h>
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#include <llvm/Module.h>
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///////////////////////////////////////////////////////////////////////////
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// DeclSpecs
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DeclSpecs::DeclSpecs(const Type *t, StorageClass sc, int tq) {
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baseType = t;
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storageClass = sc;
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typeQualifier = tq;
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soaWidth = 0;
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vectorSize = 0;
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}
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void
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DeclSpecs::Print() const {
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if (storageClass == SC_EXTERN) printf("extern ");
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if (storageClass == SC_EXTERN_C) printf("extern \"C\" ");
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if (storageClass == SC_EXPORT) printf("export ");
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if (storageClass == SC_STATIC) printf("static ");
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if (storageClass == SC_TYPEDEF) printf("typedef ");
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if (soaWidth > 0) printf("soa<%d> ", soaWidth);
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if (typeQualifier & TYPEQUAL_INLINE) printf("inline ");
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if (typeQualifier & TYPEQUAL_CONST) printf("const ");
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if (typeQualifier & TYPEQUAL_UNIFORM) printf("uniform ");
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if (typeQualifier & TYPEQUAL_VARYING) printf("varying ");
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if (typeQualifier & TYPEQUAL_TASK) printf("task ");
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if (typeQualifier & TYPEQUAL_REFERENCE) printf("reference ");
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if (typeQualifier & TYPEQUAL_UNSIGNED) printf("unsigned ");
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printf("%s", baseType->GetString().c_str());
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if (vectorSize > 0) printf("<%d>", vectorSize);
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}
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///////////////////////////////////////////////////////////////////////////
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// Declarator
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Declarator::Declarator(Symbol *s, SourcePos p)
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: pos(p) {
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sym = s;
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functionArgs = NULL;
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isFunction = false;
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initExpr = NULL;
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pointerCount = 0;
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}
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void
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Declarator::AddArrayDimension(int size) {
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assert(size > 0 || size == -1); // -1 -> unsized
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arraySize.push_back(size);
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}
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void
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Declarator::InitFromDeclSpecs(DeclSpecs *ds) {
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sym->type = GetType(ds);
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for (int i = 0; i < pointerCount; ++i) {
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// Only function pointers for now...
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if (dynamic_cast<const FunctionType *>(sym->type) == NULL)
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Error(pos, "Only pointers to functions are currently allowed, "
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"not pointers to \"%s\".", sym->type->GetString().c_str());
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else
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sym->type = new PointerType(sym->type, true, false);
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}
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sym->storageClass = ds->storageClass;
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}
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void
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Declarator::Print() const {
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printf("%s", sym->name.c_str());
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if (initExpr != NULL) {
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printf(" = (");
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initExpr->Print();
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printf(")");
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}
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pos.Print();
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}
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void
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Declarator::GetFunctionInfo(DeclSpecs *ds, Symbol **funSym,
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std::vector<Symbol *> *funArgs) {
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// Get the symbol for the function from the symbol table. (It should
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// already have been added to the symbol table by AddGlobal() by the
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// time we get here.)
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const FunctionType *type =
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dynamic_cast<const FunctionType *>(GetType(ds));
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assert(type != NULL);
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*funSym = m->symbolTable->LookupFunction(sym->name.c_str(), type);
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if (*funSym != NULL)
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// May be NULL due to error earlier in compilation
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(*funSym)->pos = pos;
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if (functionArgs != NULL) {
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for (unsigned int i = 0; i < functionArgs->size(); ++i) {
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Declaration *pdecl = (*functionArgs)[i];
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assert(pdecl->declarators.size() == 1);
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funArgs->push_back(pdecl->declarators[0]->sym);
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}
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}
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}
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static const Type *
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lGetType(const Declarator *decl, DeclSpecs *ds,
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std::vector<int>::const_iterator arrayIter) {
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if (arrayIter == decl->arraySize.end()) {
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// If we don't have an array (or have processed all of the array
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// dimensions in previous recursive calls), we can go ahead and
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// figure out the final non-array type we have here.
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const Type *type = ds->baseType;
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if (type == NULL) {
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Error(decl->pos, "Type not provided in variable declaration for variable \"%s\".",
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decl->sym->name.c_str());
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return NULL;
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}
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// Account for 'unsigned' and 'const' qualifiers in the type
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if ((ds->typeQualifier & TYPEQUAL_UNSIGNED) != 0) {
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const Type *unsignedType = type->GetAsUnsignedType();
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if (unsignedType != NULL)
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type = unsignedType;
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else
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Error(decl->pos, "\"unsigned\" qualifier is illegal with \"%s\" type.",
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type->GetString().c_str());
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}
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if ((ds->typeQualifier & TYPEQUAL_CONST) != 0)
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type = type->GetAsConstType();
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if (ds->vectorSize > 0) {
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const AtomicType *atomicType = dynamic_cast<const AtomicType *>(type);
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if (atomicType == NULL) {
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Error(decl->pos, "Only atomic types (int, float, ...) are legal for vector "
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"types.");
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return NULL;
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}
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type = new VectorType(atomicType, ds->vectorSize);
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}
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// if uniform/varying is specified explicitly, then go with that
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if ((ds->typeQualifier & TYPEQUAL_UNIFORM) != 0)
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return type->GetAsUniformType();
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else if ((ds->typeQualifier & TYPEQUAL_VARYING) != 0)
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return type->GetAsVaryingType();
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else {
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// otherwise, structs are uniform by default and everything
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// else is varying by default
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if (dynamic_cast<const StructType *>(type) != NULL)
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return type->GetAsUniformType();
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else
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return type->GetAsVaryingType();
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}
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}
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else {
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// Peel off one dimension of the array
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int arraySize = *arrayIter;
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++arrayIter;
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// Get the type, not including the arraySize dimension peeled off
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// above.
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const Type *childType = lGetType(decl, ds, arrayIter);
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int soaWidth = ds->soaWidth;
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if (soaWidth == 0)
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// If there's no "soa<n>" stuff going on, just return a regular
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// array with the appropriate size
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return new ArrayType(childType, arraySize == -1 ? 0 : arraySize);
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else {
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// Make sure we actually have an array of structs ..
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const StructType *childStructType =
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dynamic_cast<const StructType *>(childType);
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if (childStructType == NULL) {
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Error(decl->pos, "Illegal to provide soa<%d> qualifier with non-struct "
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"type \"%s\".", soaWidth, childType->GetString().c_str());
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return new ArrayType(childType, arraySize == -1 ? 0 : arraySize);
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}
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else if ((soaWidth & (soaWidth - 1)) != 0) {
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Error(decl->pos, "soa<%d> width illegal. Value must be power of two.",
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soaWidth);
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return NULL;
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}
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else if (arraySize != -1 && (arraySize % soaWidth) != 0) {
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Error(decl->pos, "soa<%d> width must evenly divide array size %d.",
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soaWidth, arraySize);
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return NULL;
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}
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return new SOAArrayType(childStructType, arraySize == -1 ? 0 : arraySize,
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soaWidth);
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}
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}
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}
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const Type *
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Declarator::GetType(DeclSpecs *ds) const {
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bool hasUniformQual = ((ds->typeQualifier & TYPEQUAL_UNIFORM) != 0);
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bool hasVaryingQual = ((ds->typeQualifier & TYPEQUAL_VARYING) != 0);
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bool isTask = ((ds->typeQualifier & TYPEQUAL_TASK) != 0);
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bool isReference = ((ds->typeQualifier & TYPEQUAL_REFERENCE) != 0);
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if (hasUniformQual && hasVaryingQual) {
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Error(pos, "Can't provide both \"uniform\" and \"varying\" qualifiers.");
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return NULL;
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}
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if (isFunction) {
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std::vector<const Type *> args;
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std::vector<std::string> argNames;
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if (functionArgs) {
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// Loop over the function arguments and get names and types for
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// each one in the args and argNames arrays
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for (unsigned int i = 0; i < functionArgs->size(); ++i) {
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Declaration *d = (*functionArgs)[i];
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Symbol *sym;
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if (d->declarators.size() == 0) {
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// function declaration like foo(float), w/o a name for
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// the parameter
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char buf[32];
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sprintf(buf, "__anon_parameter_%d", i);
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sym = new Symbol(buf, pos);
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Declarator *declarator = new Declarator(sym, sym->pos);
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sym->type = declarator->GetType(d->declSpecs);
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d->declarators.push_back(declarator);
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}
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else {
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assert(d->declarators.size() == 1);
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sym = d->declarators[0]->sym;
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}
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// Arrays are passed by reference, so convert array
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// parameters to be references here.
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if (dynamic_cast<const ArrayType *>(sym->type) != NULL)
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sym->type = new ReferenceType(sym->type, sym->type->IsConstType());
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args.push_back(sym->type);
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argNames.push_back(sym->name);
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}
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}
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if (ds->baseType == NULL) {
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Warning(pos, "No return type provided in declaration of function \"%s\". "
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"Treating as \"void\".", sym->name.c_str());
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ds->baseType = AtomicType::Void;
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}
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if (isReference) {
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Error(pos, "Function return types can't be reference types.");
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return NULL;
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}
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const Type *returnType = lGetType(this, ds, arraySize.begin());
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if (returnType == NULL)
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return NULL;
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bool isExported = (ds->storageClass == SC_EXPORT);
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bool isExternC = (ds->storageClass == SC_EXTERN_C);
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return new FunctionType(returnType, args, pos, &argNames, isTask,
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isExported, isExternC);
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}
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else {
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if (isTask)
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Error(pos, "\"task\" qualifier illegal in variable declaration \"%s\".",
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sym->name.c_str());
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const Type *type = lGetType(this, ds, arraySize.begin());
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if (type != NULL && isReference) {
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bool hasConstQual = ((ds->typeQualifier & TYPEQUAL_CONST) != 0);
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type = new ReferenceType(type, hasConstQual);
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}
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return type;
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}
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}
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///////////////////////////////////////////////////////////////////////////
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// Declaration
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Declaration::Declaration(DeclSpecs *ds, std::vector<Declarator *> *dlist) {
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declSpecs = ds;
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if (dlist != NULL)
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declarators = *dlist;
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for (unsigned int i = 0; i < declarators.size(); ++i)
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if (declarators[i] != NULL)
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declarators[i]->InitFromDeclSpecs(declSpecs);
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}
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Declaration::Declaration(DeclSpecs *ds, Declarator *d) {
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declSpecs = ds;
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if (d) {
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d->InitFromDeclSpecs(ds);
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declarators.push_back(d);
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}
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}
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std::vector<VariableDeclaration>
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Declaration::GetVariableDeclarations() const {
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assert(declSpecs->storageClass != SC_TYPEDEF);
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std::vector<VariableDeclaration> vars;
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for (unsigned int i = 0; i < declarators.size(); ++i) {
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if (declarators[i] == NULL)
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continue;
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Declarator *decl = declarators[i];
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if (!decl || decl->isFunction)
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continue;
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m->symbolTable->AddVariable(declarators[i]->sym);
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vars.push_back(VariableDeclaration(declarators[i]->sym,
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declarators[i]->initExpr));
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}
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return vars;
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}
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void
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Declaration::Print() const {
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printf("Declaration: specs [");
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declSpecs->Print();
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printf("], declarators [");
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for (unsigned int i = 0 ; i < declarators.size(); ++i) {
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declarators[i]->Print();
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printf("%s", (i == declarators.size() - 1) ? "]" : ", ");
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}
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}
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///////////////////////////////////////////////////////////////////////////
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void
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GetStructTypesNamesPositions(const std::vector<StructDeclaration *> &sd,
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std::vector<const Type *> *elementTypes,
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std::vector<std::string> *elementNames,
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std::vector<SourcePos> *elementPositions) {
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for (unsigned int i = 0; i < sd.size(); ++i) {
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const Type *type = sd[i]->type;
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// FIXME: making this fake little DeclSpecs here is really
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// disgusting
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DeclSpecs ds(type);
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if (type->IsUniformType())
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ds.typeQualifier |= TYPEQUAL_UNIFORM;
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else
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ds.typeQualifier |= TYPEQUAL_VARYING;
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for (unsigned int j = 0; j < sd[i]->declarators->size(); ++j) {
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Declarator *d = (*sd[i]->declarators)[j];
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d->InitFromDeclSpecs(&ds);
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// if it's an unsized array, make it a reference to an unsized
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// array, so the caller can pass a pointer...
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const ArrayType *at = dynamic_cast<const ArrayType *>(d->sym->type);
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if (at && at->GetElementCount() == 0)
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d->sym->type = new ReferenceType(d->sym->type, type->IsConstType());
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elementTypes->push_back(d->sym->type);
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elementNames->push_back(d->sym->name);
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elementPositions->push_back(d->sym->pos);
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}
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}
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}
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