[ce36b55] | 1 | //
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2018 University of Waterloo
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| 3 | //
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| 4 | // The contents of this file are covered under the licence agreement in the
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| 5 | // file "LICENCE" distributed with Cforall.
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| 6 | //
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| 7 | // InitializerLength.cpp -- Calculate the length of arrays from initializers.
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| 8 | //
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| 9 | // Author : Andrew Beach
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| 10 | // Created On : Fri Nov 12 11:46:00 2021
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| 11 | // Last Modified By : Andrew Beach
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| 12 | // Last Modified On : Fri Nov 12 13:35:00 2021
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| 13 | // Update Count : 0
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| 14 | //
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| 15 |
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[91a72ef] | 16 | #include "InitializerLength.hpp"
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[ce36b55] | 17 |
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| 18 | #include "AST/Expr.hpp"
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| 19 | #include "AST/Decl.hpp"
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| 20 | #include "AST/Pass.hpp"
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| 21 | #include "AST/TranslationUnit.hpp"
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| 22 |
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| 23 | namespace Validate {
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| 24 |
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| 25 | namespace {
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| 26 |
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| 27 | /// for array types without an explicit length, compute the length and store it so that it
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| 28 | /// is known to the rest of the phases. For example,
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| 29 | /// int x[] = { 1, 2, 3 };
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| 30 | /// int y[][2] = { { 1, 2, 3 }, { 1, 2, 3 } };
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| 31 | /// here x and y are known at compile-time to have length 3, so change this into
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| 32 | /// int x[3] = { 1, 2, 3 };
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| 33 | /// int y[3][2] = { { 1, 2, 3 }, { 1, 2, 3 } };
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| 34 | struct InitializerLength {
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| 35 | const ast::ObjectDecl * previsit( const ast::ObjectDecl * decl );
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| 36 | };
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| 37 |
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| 38 | const ast::ObjectDecl * InitializerLength::previsit( const ast::ObjectDecl * decl ) {
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| 39 | if ( auto type = decl->type.as<ast::ArrayType>() ) {
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| 40 | if ( type->dimension ) return decl;
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| 41 | if ( auto init = decl->init.as<ast::ListInit>() ) {
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| 42 | ast::ObjectDecl * mutDecl = ast::mutate( decl );
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| 43 | ast::ArrayType * mutType = ast::mutate( type );
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| 44 | mutType->dimension = ast::ConstantExpr::from_ulong(
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| 45 | mutDecl->location, init->size() );
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| 46 | mutDecl->type = mutType;
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| 47 | return mutDecl;
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| 48 | }
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| 49 | }
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| 50 | return decl;
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| 51 | }
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| 52 |
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| 53 | } // namespace
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| 54 |
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| 55 | void setLengthFromInitializer( ast::TranslationUnit & translationUnit ) {
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| 56 | ast::Pass<InitializerLength>::run( translationUnit );
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| 57 | }
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| 58 |
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| 59 | } // namespace Validate
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| 60 |
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| 61 | // Local Variables: //
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| 62 | // tab-width: 4 //
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| 63 | // mode: c++ //
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| 64 | // compile-command: "make install" //
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| 65 | // End: //
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