tree.h (expand_expr_stmt_value): Add maybe_last argument.

	* tree.h (expand_expr_stmt_value): Add maybe_last argument.
	* c-common.h (genrtl_expr_stmt_value): Likewise.
	* stmt.c (expand_expr_stmt): Pass 1 as maybe_last.
	(expand_expr_stmt_value): Add maybe_last argument.
	Don't warn about statement with no effect if it is the last statement
	in expression statement.
	* c-semantics.c (genrtl_expr_stmt): Pass 1 as maybe_last.
	(genrtl_expr_stmt_value): Add maybe_last argument, pass it down to
	expand_expr_stmt_value.
	(expand_stmt) [EXPR_STMT]: Pass 1 as maybe_last to
	genrtl_expr_stmt_value if t is the last EXPR_STMT in its scope.
	* expr.c (expand_expr) [LABELED_BLOCK_EXPR, LOOP_EXPR]: Pass 1
	as maybe_last to expand_expr_stmt_value.

	* gcc.dg/20020104-1.c: New test.

From-SVN: r48541

1 files changed, 2 insertions, 2 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index b07d88d..04d801d 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -6453,7 +6453,7 @@ expand_expr (exp, target, tmode, modifier)
 
     case LABELED_BLOCK_EXPR:
       if (LABELED_BLOCK_BODY (exp))
-	expand_expr_stmt_value (LABELED_BLOCK_BODY (exp), 0);
+	expand_expr_stmt_value (LABELED_BLOCK_BODY (exp), 0, 1);
       /* Should perhaps use expand_label, but this is simpler and safer.  */
       do_pending_stack_adjust ();
       emit_label (label_rtx (LABELED_BLOCK_LABEL (exp)));
@@ -6468,7 +6468,7 @@ expand_expr (exp, target, tmode, modifier)
     case LOOP_EXPR:
       push_temp_slots ();
       expand_start_loop (1);
-      expand_expr_stmt_value (TREE_OPERAND (exp, 0), 0);
+      expand_expr_stmt_value (TREE_OPERAND (exp, 0), 0, 1);
       expand_end_loop ();
       pop_temp_slots ();