This hack, has described in more details in the email labeled "Line 0 Hack??",
was now causing problem when serializing the line_table in pph.
According to the revision history: this was introduced by steven in 2005:
commit ba821eb102fc1a654c0542fcba73898340a9a02d
Author: steven <steven@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat Jan 1 16:15:23 2005 +0000
* emit-rtl.c (add_insn_before): Fix comment typo.
PR middle-end/17544
* c-decl.c (finish_function): If compiling C99, annotate the
compiler generated return with the current file name and line 0.
* tree-cfg.c (remove_useless_stmts_warn_notreached): Only warn if
the source line is greater than 0.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@92784
138bc75d-0d04-0410-961f-82ee72b054a4
The function remove_useless_stmts_warn_notreached refered to by steven in his
2005 commit has been removed on 2009-10-08 by m...@suse.de according to
ChangeLog-2009.
This patch removes this hack which appears to be no longer necessary.
Tested with a full bootstrap build and regression testing on x64.
Gabriel
2011-08-01 Gabriel Charette <gch...@google.com>
* decl.c (finish_function): Remove unecessary line 0 hack.
diff --git a/gcc/cp/decl.c b/gcc/cp/decl.c
index 2000bd4..9ee3c6d 100644
--- a/gcc/cp/decl.c
+++ b/gcc/cp/decl.c
@@ -13220,22 +13220,13 @@ finish_function (int flags)
{
if (DECL_MAIN_P (current_function_decl))
{
- tree stmt;
-
/* Make it so that `main' always returns 0 by default (or
1 for VMS). */
#if VMS_TARGET
- stmt = finish_return_stmt (integer_one_node);
+ finish_return_stmt (integer_one_node);
#else
- stmt = finish_return_stmt (integer_zero_node);
+ finish_return_stmt (integer_zero_node);
#endif
- /* Hack. We don't want the middle-end to warn that this
- return is unreachable, so put the statement on the
- special line 0. */
- {
- location_t linezero = linemap_line_start (line_table, 0, 1);
- SET_EXPR_LOCATION (stmt, linezero);
- }
}
if (use_eh_spec_block (current_function_decl))
--
This patch is available for review at http://codereview.appspot.com/4835047
