From b02d9c2634de0898b2c483c438ba56540e0f3f69 Mon Sep 17 00:00:00 2001 From: Clifford Wolf Date: Sun, 10 Mar 2019 16:27:18 -0700 Subject: [PATCH] Fix handling of cases that look like sva labels, fixes #862 Signed-off-by: Clifford Wolf --- frontends/verilog/verilog_lexer.l | 59 +++--------------- frontends/verilog/verilog_parser.y | 99 +++++++++++++++++------------- 2 files changed, 66 insertions(+), 92 deletions(-) diff --git a/frontends/verilog/verilog_lexer.l b/frontends/verilog/verilog_lexer.l index e51a12f76..6ef38252a 100644 --- a/frontends/verilog/verilog_lexer.l +++ b/frontends/verilog/verilog_lexer.l @@ -189,57 +189,18 @@ YOSYS_NAMESPACE_END "always_ff" { SV_KEYWORD(TOK_ALWAYS); } "always_latch" { SV_KEYWORD(TOK_ALWAYS); } - /* parse labels on assert, assume, cover, and restrict right here because it's insanley complex - to do it in the parser (because we force the parser too early to reduce when parsing cells..) */ -([a-zA-Z_$][a-zA-Z0-9_$]*[ \t\r\n]*:[ \t\r\n]*)?(assert|assume|cover|restrict)/[^a-zA-Z0-9_$\.] { - frontend_verilog_yylval.string = new std::string(yytext); - auto &str = *frontend_verilog_yylval.string; - std::string keyword; - int cursor = 0; - - while (1) { - if (cursor == GetSize(str)) { - keyword = str; - delete frontend_verilog_yylval.string; - frontend_verilog_yylval.string = nullptr; - goto sva_without_label; - } - char c = str[cursor]; - if (c != ' ' && c != '\t' && c != '\r' && c != '\n' && c != ':') { - cursor++; - continue; - } - - keyword = str.substr(cursor); - str = "\\" + str.substr(0, cursor); - break; - } - - cursor = 0; - while (1) { - log_assert(cursor < GetSize(keyword)); - char c = keyword[cursor]; - if (c != ' ' && c != '\t' && c != '\r' && c != '\n' && c != ':') { - keyword = keyword.substr(cursor); - break; - } - cursor++; - } - - if (keyword == "assert") { return TOK_ASSERT; } - else if (keyword == "assume") { return TOK_ASSUME; } - else if (keyword == "cover") { return TOK_COVER; } - else if (keyword == "restrict") { return TOK_RESTRICT; } - else log_abort(); - -sva_without_label: - if (keyword == "assert") { if (formal_mode) return TOK_ASSERT; SV_KEYWORD(TOK_ASSERT); } - else if (keyword == "assume") { if (formal_mode) return TOK_ASSUME; SV_KEYWORD(TOK_ASSUME); } - else if (keyword == "cover") { if (formal_mode) return TOK_COVER; SV_KEYWORD(TOK_COVER); } - else if (keyword == "restrict") { if (formal_mode) return TOK_RESTRICT; SV_KEYWORD(TOK_RESTRICT); } - else log_abort(); + /* use special token for labels on assert, assume, cover, and restrict because it's insanley complex + to fix parsing of cells otherwise. (the current cell parser forces a reduce very early to update some + global state.. its a mess) */ +[a-zA-Z_$][a-zA-Z0-9_$]*/[ \t\r\n]*:[ \t\r\n]*(assert|assume|cover|restrict)[^a-zA-Z0-9_$\.] { + frontend_verilog_yylval.string = new std::string(std::string("\\") + yytext); + return TOK_SVA_LABEL; } +"assert" { if (formal_mode) return TOK_ASSERT; SV_KEYWORD(TOK_ASSERT); } +"assume" { if (formal_mode) return TOK_ASSUME; SV_KEYWORD(TOK_ASSUME); } +"cover" { if (formal_mode) return TOK_COVER; SV_KEYWORD(TOK_COVER); } +"restrict" { if (formal_mode) return TOK_RESTRICT; SV_KEYWORD(TOK_RESTRICT); } "property" { if (formal_mode) return TOK_PROPERTY; SV_KEYWORD(TOK_PROPERTY); } "rand" { if (formal_mode) return TOK_RAND; SV_KEYWORD(TOK_RAND); } "const" { if (formal_mode) return TOK_CONST; SV_KEYWORD(TOK_CONST); } diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y index 649dd384f..52685f637 100644 --- a/frontends/verilog/verilog_parser.y +++ b/frontends/verilog/verilog_parser.y @@ -105,8 +105,8 @@ static void free_attr(std::map *al) bool boolean; } -%token TOK_STRING TOK_ID TOK_CONSTVAL TOK_REALVAL TOK_PRIMITIVE -%token TOK_ASSERT TOK_ASSUME TOK_RESTRICT TOK_COVER +%token TOK_STRING TOK_ID TOK_CONSTVAL TOK_REALVAL TOK_PRIMITIVE TOK_SVA_LABEL +%token TOK_ASSERT TOK_ASSUME TOK_RESTRICT TOK_COVER %token ATTR_BEGIN ATTR_END DEFATTR_BEGIN DEFATTR_END %token TOK_MODULE TOK_ENDMODULE TOK_PARAMETER TOK_LOCALPARAM TOK_DEFPARAM %token TOK_PACKAGE TOK_ENDPACKAGE TOK_PACKAGESEP @@ -126,7 +126,7 @@ static void free_attr(std::map *al) %type range range_or_multirange non_opt_range non_opt_multirange range_or_signed_int %type wire_type expr basic_expr concat_list rvalue lvalue lvalue_concat_list -%type opt_label tok_prim_wrapper hierarchical_id +%type opt_label opt_sva_label tok_prim_wrapper hierarchical_id %type opt_signed opt_property unique_case_attr %type attr case_attr @@ -1329,6 +1329,14 @@ opt_label: $$ = NULL; }; +opt_sva_label: + TOK_SVA_LABEL ':' { + $$ = $1; + } | + /* empty */ { + $$ = NULL; + }; + opt_property: TOK_PROPERTY { $$ = true; @@ -1373,11 +1381,11 @@ modport_type_token: TOK_INPUT {current_modport_input = 1; current_modport_output = 0;} | TOK_OUTPUT {current_modport_input = 0; current_modport_output = 1;} assert: - TOK_ASSERT opt_property '(' expr ')' ';' { + opt_sva_label TOK_ASSERT opt_property '(' expr ')' ';' { if (noassert_mode) { - delete $4; + delete $5; } else { - AstNode *node = new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $4); + AstNode *node = new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); @@ -1385,11 +1393,11 @@ assert: if ($1 != nullptr) delete $1; } | - TOK_ASSUME opt_property '(' expr ')' ';' { + opt_sva_label TOK_ASSUME opt_property '(' expr ')' ';' { if (noassume_mode) { - delete $4; + delete $5; } else { - AstNode *node = new AstNode(assert_assumes_mode ? AST_ASSERT : AST_ASSUME, $4); + AstNode *node = new AstNode(assert_assumes_mode ? AST_ASSERT : AST_ASSUME, $5); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); @@ -1397,11 +1405,11 @@ assert: if ($1 != nullptr) delete $1; } | - TOK_ASSERT opt_property '(' TOK_EVENTUALLY expr ')' ';' { + opt_sva_label TOK_ASSERT opt_property '(' TOK_EVENTUALLY expr ')' ';' { if (noassert_mode) { - delete $5; + delete $6; } else { - AstNode *node = new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $5); + AstNode *node = new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); @@ -1409,11 +1417,11 @@ assert: if ($1 != nullptr) delete $1; } | - TOK_ASSUME opt_property '(' TOK_EVENTUALLY expr ')' ';' { + opt_sva_label TOK_ASSUME opt_property '(' TOK_EVENTUALLY expr ')' ';' { if (noassume_mode) { - delete $5; + delete $6; } else { - AstNode *node = new AstNode(assert_assumes_mode ? AST_LIVE : AST_FAIR, $5); + AstNode *node = new AstNode(assert_assumes_mode ? AST_LIVE : AST_FAIR, $6); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); @@ -1421,15 +1429,15 @@ assert: if ($1 != nullptr) delete $1; } | - TOK_COVER opt_property '(' expr ')' ';' { - AstNode *node = new AstNode(AST_COVER, $4); + opt_sva_label TOK_COVER opt_property '(' expr ')' ';' { + AstNode *node = new AstNode(AST_COVER, $5); if ($1 != nullptr) { node->str = *$1; delete $1; } ast_stack.back()->children.push_back(node); } | - TOK_COVER opt_property '(' ')' ';' { + opt_sva_label TOK_COVER opt_property '(' ')' ';' { AstNode *node = new AstNode(AST_COVER, AstNode::mkconst_int(1, false)); if ($1 != nullptr) { node->str = *$1; @@ -1437,7 +1445,7 @@ assert: } ast_stack.back()->children.push_back(node); } | - TOK_COVER ';' { + opt_sva_label TOK_COVER ';' { AstNode *node = new AstNode(AST_COVER, AstNode::mkconst_int(1, false)); if ($1 != nullptr) { node->str = *$1; @@ -1445,87 +1453,87 @@ assert: } ast_stack.back()->children.push_back(node); } | - TOK_RESTRICT opt_property '(' expr ')' ';' { + opt_sva_label TOK_RESTRICT opt_property '(' expr ')' ';' { if (norestrict_mode) { - delete $4; + delete $5; } else { - AstNode *node = new AstNode(AST_ASSUME, $4); + AstNode *node = new AstNode(AST_ASSUME, $5); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); } - if (!$2) + if (!$3) log_file_warning(current_filename, get_line_num(), "SystemVerilog does not allow \"restrict\" without \"property\".\n"); if ($1 != nullptr) delete $1; } | - TOK_RESTRICT opt_property '(' TOK_EVENTUALLY expr ')' ';' { + opt_sva_label TOK_RESTRICT opt_property '(' TOK_EVENTUALLY expr ')' ';' { if (norestrict_mode) { - delete $5; + delete $6; } else { - AstNode *node = new AstNode(AST_FAIR, $5); + AstNode *node = new AstNode(AST_FAIR, $6); if ($1 != nullptr) node->str = *$1; ast_stack.back()->children.push_back(node); } - if (!$2) + if (!$3) log_file_warning(current_filename, get_line_num(), "SystemVerilog does not allow \"restrict\" without \"property\".\n"); if ($1 != nullptr) delete $1; }; assert_property: - TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' { - ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $4)); + opt_sva_label TOK_ASSERT TOK_PROPERTY '(' expr ')' ';' { + ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_ASSUME : AST_ASSERT, $5)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } | - TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' { - ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4)); + opt_sva_label TOK_ASSUME TOK_PROPERTY '(' expr ')' ';' { + ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } | - TOK_ASSERT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { - ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $5)); + opt_sva_label TOK_ASSERT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { + ast_stack.back()->children.push_back(new AstNode(assume_asserts_mode ? AST_FAIR : AST_LIVE, $6)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } | - TOK_ASSUME TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { - ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5)); + opt_sva_label TOK_ASSUME TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { + ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } | - TOK_COVER TOK_PROPERTY '(' expr ')' ';' { - ast_stack.back()->children.push_back(new AstNode(AST_COVER, $4)); + opt_sva_label TOK_COVER TOK_PROPERTY '(' expr ')' ';' { + ast_stack.back()->children.push_back(new AstNode(AST_COVER, $5)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } | - TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' { + opt_sva_label TOK_RESTRICT TOK_PROPERTY '(' expr ')' ';' { if (norestrict_mode) { - delete $4; + delete $5; } else { - ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $4)); + ast_stack.back()->children.push_back(new AstNode(AST_ASSUME, $5)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; } } } | - TOK_RESTRICT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { + opt_sva_label TOK_RESTRICT TOK_PROPERTY '(' TOK_EVENTUALLY expr ')' ';' { if (norestrict_mode) { - delete $5; + delete $6; } else { - ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $5)); + ast_stack.back()->children.push_back(new AstNode(AST_FAIR, $6)); if ($1 != nullptr) { ast_stack.back()->children.back()->str = *$1; delete $1; @@ -1748,6 +1756,11 @@ case_expr_list: TOK_DEFAULT { ast_stack.back()->children.push_back(new AstNode(AST_DEFAULT)); } | + TOK_SVA_LABEL { + ast_stack.back()->children.push_back(new AstNode(AST_IDENTIFIER)); + ast_stack.back()->children.back()->str = *$1; + delete $1; + } | expr { ast_stack.back()->children.push_back($1); } | -- 2.30.2