mirror of
git://gcc.gnu.org/git/gcc.git
synced 2025-04-04 03:40:30 +08:00
16ef3accae
PR c/772 PR c/17913 * c-tree.h (C_DECL_UNJUMPABLE_STMT_EXPR, C_DECL_UNDEFINABLE_STMT_EXPR, struct c_label_list, struct c_label_context, label_context_stack): New. * c-decl.c (define_label): Check for jumps into statement expressions. Add label to list of defined labels. (start_function): Push context on label_context_stack. (finish_function): Pop context from label_context_stack. * c-typeck.c (label_context_stack): New. (c_finish_goto_label): Check for jumps into statement expressions. Add label to list of jumped to labels. (struct c_switch): Add blocked_stmt_expr. (c_start_case): Initialize it. (do_case): Check it. (c_finish_case): Verify !blocked_stmt_expr. (c_begin_stmt_expr): Push context on label_context_stack. Increment blocked_stmt_expr. Mark labels jumped to from outside as undefinable. (c_finish_stmt_expr): December blocked_stmt_expr. Mark labels defined in the statement expression and no longer jumpable to. Mark labels jumped to from just outside the statement expression as again definable. Pop context from label_context_stack. * doc/extend.texi (Statement Exprs): Update. objc: * objc-act.c (objc_start_function): Push context on label_context_stack. testsuite: * gcc.dg/stmt-expr-label-1.c, gcc.dg/stmt-expr-label-2.c, gcc.dg/stmt-expr-label-3.c : New tests. * gcc.c-torture/execute/medce-2.c: Remove. From-SVN: r97273
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the file COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs.html for how to report bugs usefully.