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tree.h (warn_about_unused_variables): Declare. 

* tree.h (warn_about_unused_variables): Declare.
	* stmt.c (warn_about_unused_variables): New function, split out
	from ...
	(expand_end_bindings): Here.

From-SVN: r29486
This commit is contained in:
Mark Mitchell 1999-09-17 22:13:07 +00:00 committed by Mark Mitchell
parent 086925d8cc
commit ba7166773b
3 changed files with 30 additions and 7 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
Fri Sep 17 15:11:20 1999 Mark Mitchell <mark@codesourcery.com>
* tree.h (warn_about_unused_variables): Declare.
* stmt.c (warn_about_unused_variables): New function, split out
from ...
(expand_end_bindings): Here.
Fri Sep 17 15:07:37 1999 Mark Mitchell <mark@codesourcery.com>
* stmt.c (preserve_subexpressions_p): Don't crash when

29
gcc/stmt.c
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@ -3492,6 +3492,25 @@ expand_nl_goto_receivers (thisblock)
emit_label (afterward);
}
/* Warn about any unused VARS (which may contain nodes other than
VAR_DECLs, but such nodes are ignored). The nodes are connected
via the TREE_CHAIN field. */
void
warn_about_unused_variables (vars)
tree vars;
{
tree decl;
if (warn_unused)
for (decl = vars; decl; decl = TREE_CHAIN (decl))
if (TREE_CODE (decl) == VAR_DECL
&& ! TREE_USED (decl)
&& ! DECL_IN_SYSTEM_HEADER (decl)
&& DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
warning_with_decl (decl, "unused variable `%s'");
}
/* Generate RTL code to terminate a binding contour.
VARS is the chain of VAR_DECL nodes for the variables bound in this
@ -3532,13 +3551,9 @@ expand_end_bindings (vars, mark_ends, dont_jump_in)
thisblock = block_stack;
if (warn_unused)
for (decl = vars; decl; decl = TREE_CHAIN (decl))
if (TREE_CODE (decl) == VAR_DECL
&& ! TREE_USED (decl)
&& ! DECL_IN_SYSTEM_HEADER (decl)
&& DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
warning_with_decl (decl, "unused variable `%s'");
/* If any of the variables in this scope were not used, warn the
user. */
warn_about_unused_variables (vars);
if (thisblock->exit_label)
{

1
gcc/tree.h
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@ -2054,6 +2054,7 @@ extern void expand_return PROTO((tree));
extern int optimize_tail_recursion PROTO((tree, struct rtx_def *));
extern void expand_start_bindings PROTO((int));
extern void expand_end_bindings PROTO((tree, int, int));
extern void warn_about_unused_variables PROTO((tree));
extern void start_cleanup_deferral PROTO((void));
extern void end_cleanup_deferral PROTO((void));
extern void mark_block_as_eh_region PROTO((void));